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❤️爆肝六万字最全总结Java数据库编程MyBatis(建议收藏)
❤️爆肝万字!一文最全总结之Spring从入门到入土❤️(建议收藏)
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1. Spring MVC 概述
2.1 Spring MVC是什么
Spring web mvc是表现层的框架,它是Spring框架的一部分,我们可以从Spring的整体结构中看得出来:
1.0 Spring MVC处理流程
l 1)核心控制器:处理特定请求。(例如:以*.action为后缀)
名称:DispatcherServlet 配置:是一个servlet,需要在web.xml中配置。 XML:需要确定核心XML配置文件的位置
l 2)核心XML配置文件:确定Controller位置、确定JSP页面位置
名称:springmvc.xml
l 3)控制器:开发人员编写的主要内容
名称:*Controller
l 流程示意图
2. 入门案例:查询详情 ( xml)
3.1 需求说明
在index.html中点击 Hello SpringMVC 超链接,在 show01 .jsp 页面显示信息。
2.1 思路分析
整体思路:
跟HelloServlet入门案例几乎相同 .
服务器设置一个Controller,相当于之前的Servlet,可以接收请求,把请求在转发给jsp页面.
这里的区别就是需要设置web.xml和springmvc.xml两个配置文件,前者是用来配置核心控制器,后者是用来扫描我们自己书写的Controller的.
书写步骤:
1.拷贝pom文件,SpringMVC.xml文件和web.xml配置文件核心代码.
2.创建HelloController和show01.jsp
项目结构如下:
2.2 实现步骤
2.2.1 拷贝配置文件相关代码
获取pom文件:
参见当前文档末尾的附录 <SpringMVC01_pom>
获取springmvc.xml文件
代码如下直接拷贝
代码语言:javascript复制<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd">
<!-- 扫描注解包 -->
<context:component-scan base-package="com.Maynor.controller" />
</beans>
获取Web.xml代码配置如下:
代码语言:javascript复制<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0">
<display-name>Archetype Created Web Application</display-name>
<!-- 设置核心配置器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
</web-app>
2.2.2 创建java类和jsp文件
代码语言:javascript复制创建HelloController.java
package com.Maynor.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController {
@RequestMapping("/hello.action")
public String show(Model model){
model.addAttribute("data", "嘿嘿嘿");
return "/WEB-INF/show01.jsp";
}
}
Show01.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
你好啊 老弟儿 ${data}
</body>
</html>
Index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>Hello World!</h2>
<a href="${pageContext.request.contextPath}/hello.action">入门案例</a>
</body>
</html>
测试结果:
index.jsp页面
点击入门案例结果:
3. 入门查询:查询所有(无xml)
3.2 需求说明
该需求跟上一个入门案例需求完全相同.
在index.html中点击 Hello SpringMVC 超链接,在 show01 .jsp 页面显示信息。
区别在于实现的时候:
使用 WebInitializer类代替web.xml
使用MVCConfig代替springmvc.xml
3.1 思路分析
书写步骤:
1.拷贝pom文件,书写MVCConfig和WebInitializer类.
2.创建HelloController和show01.jsp
项目结构如下:
3.2 步骤实现
3.2.1 拷贝pom文件,创建MVCConfig和WebInitializer类
Pom文件,沿用上一个案例.即附录 <SpringMVC01_pom>
MVCConfig类代码如下:
代码语言:javascript复制package com.Maynor.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@Configuration
@ComponentScan("com.Maynor.controller")
public class MVCConfig {
}
传统Web项目中,程序的入口是web.xml文件。
在spring4中提供WebApplicationInitializer接口,表示服务器启动初始化。也就是说接口实现类中编写的内容,就是web.xml文件中配置的内容。
类或方法 | 描述 |
---|---|
AnnotationConfigWebApplicationContext | WEB环境下spring工厂 |
servletContext.addFilter(name , Class) | 添加过滤器,等效 |
servletContext.addServlet(name , Class) | 添加servlet,等效 |
过滤器相关方法 ServletRegistration.Dynamic | 描述 |
---|---|
addMapping(urlPatterns) | 追加过滤路径 |
setLoadOnStartup(int) | 设置启动顺序 |
WebInitializer类代码如下:
代码语言:javascript复制package com.Maynor.config;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
public class WebInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
//1.初始化spring容器
AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
applicationContext.register(MVCConfig.class);
applicationContext.setServletContext(servletContext);
//2.设置核心控制器
ServletRegistration.Dynamic springMVCServlet = servletContext.addServlet("springmvc", new DispatcherServlet(applicationContext));
springMVCServlet.addMapping("*.action");
springMVCServlet.setLoadOnStartup(2);
}
}
3.2.2 创建HelloController和show01.jsp
代码语言:javascript复制HelloController代码:
package com.Maynor.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController {
@RequestMapping(path = "/hello.action")
public String show(Model model){
model.addAttribute("data", "呵呵呵");
return "/WEB-INF/show01.jsp";
}
}
Show01.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
来了 老弟儿 ${data}
</body>
</html>
测试结果:
练习:
查询所有. 希望得到如下结果:
参考代码:
l 编写JavaBean用于封装数据
代码语言:javascript复制public class Item {
private String name; //名称
private Float price; //价格
private String detail; //详情
l 编写业务控制器Controller
代码语言:javascript复制@Controller
@RequestMapping("/user")
public class HelloController {
@RequestMapping("showInfo")
public String showInfo(Model model){
System.out.println("展示页面");
//1 模拟数据
List<Item> list = new ArrayList<Item>();
list.add(new Item("联想笔记本", 6999f, "ThinkPad T430 联想笔记本电脑!"));
list.add(new Item("苹果手机", 8800f, "iphone X 苹果手机!"));
//设置数据
model.addAttribute("list", list);
return "/showInfo.jsp";
}
}
l 展示数据
代码语言:javascript复制<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
Created by IntelliJ IDEA.
User: 86153
Date: 2019/6/14
Time: 0:50
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<table border="1">
<tr>
<td>名称</td>
<td>价格</td>
<td>描述</td>
</tr>
<c:forEach items="${list}" var="item">
<tr>
<td>${item.name }</td>
<td>${item.price }</td>
<td>${item.detail }</td>
</tr>
</c:forEach>
</table>
</body>
</html>
配置类
代码语言:javascript复制*MVCConfig
@Configuration
@ComponentScan("com.Maynor.controller")
public class MVCConfiguration {
}
WebInitalizer
public class WebInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
//1 初始化spring容器
AnnotationConfigWebApplicationContext appliation = new AnnotationConfigWebApplicationContext();
appliation.register(MVCConfiguration.class);
appliation.setServletContext(servletContext);
//3 前端控制器
ServletRegistration.Dynamic springMvcServlet = servletContext.addServlet("springmvc", new DispatcherServlet(appliation));
springMvcServlet.addMapping("*.action");
springMvcServlet.setLoadOnStartup(2);
}
}
测试:
l 步骤2:启动,并访问
http://localhost:8080/s02/user/showInfo.action
4. SSM整合:改造UMS
需求:
改造ums 实现 查询所有用户.
示意图如下:
思路:
- 环境搭建:拷贝pom,资源文件和配置文件,初始化数据库和表,创建javaBean
- 编写功能:dao,Service,Controller
- 编写配置类:SpringConfig,MyBatisConfig,SpringMvcConfig,Web启动类.
- 测试
项目最终结构如下:
4.1 搭建环境
4.0.1 创建项目、 拷贝pom文件
代码语言:javascript复制<org.springframework.version>4.2.4.RELEASE</org.springframework.version>
<dependencies>
<!-- spring start -->
<!--spring core start-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring core end-->
<!--spring aop start-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spirng aop end-->
<!--spring aspects start-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring aspects end-->
<!--spring instrumentation start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-instrument</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring instrumentation end-->
<!--spring messaging start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring messaging end-->
<!--spring data access start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring data access end-->
<!--spring web start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-websocket</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc-portlet</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring web end -->
<!--spring test start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring test end -->
<!-- spring end -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>3.7.5</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
</dependencies>
<!-- jdk版本插件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
<showWarnings>true</showWarnings>
</configuration>
</plugin>
<!-- tomcat7插件 -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.1</version>
<configuration>
<port>8081</port>
<server>tomcat7</server>
</configuration>
</plugin>
4.0.2 拷贝UMS页面
4.0.3 配置文件
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://127.0.0.1:3306/ums_db jdbc.username=root jdbc.password=1234
4.0.4 初始化数据库和表
代码语言:javascript复制CREATE TABLE t_user (
uid INT(11) PRIMARY KEY NOT NULL AUTO_INCREMENT,
login_name VARCHAR(50) DEFAULT NULL,
login_pwd VARCHAR(32) DEFAULT NULL,
age INT(11) DEFAULT NULL,
birthday DATE DEFAULT NULL,
sex VARCHAR(1) DEFAULT NULL,
education VARCHAR(50),
telephone VARCHAR(11),
interest VARCHAR(100),
remark VARCHAR(200)
)
代码语言:javascript复制insert into `t_user`(`uid`,`login_name`,`login_pwd`,`age`,`birthday`,`sex`,`education`,`telephone`,`interest`,`remark`) values (1,'jack','1234',18,'1996-11-11','男',NULL,NULL,NULL,NULL),(2,'rose','1234',21,'1993-11-11','女',NULL,NULL,NULL,NULL),(3,'tom','1234',23,'1996-12-24','男',NULL,NULL,NULL,NULL);
4.0.5 创建JavaBean
代码语言:javascript复制@Table(name="t_user")
public class User {
@Id
private Integer uid;
private String loginName;
private String loginPwd;
private Integer age;
private String sex;
private String birthday;
private String education;
private String telephone;
private String interest; //爱好:对应数据库(内容:A,B,C)
private String[] interestArr; //爱好:对应页面表单
private String remark;
l 爱好需要特殊处理
代码语言:javascript复制 public String getInterest() {
if(interestArr != null){
interest = Arrays.toString(interestArr); //[A,B,C]
interest = interest.substring(1, interest.length() - 1); //A,B,C
}
return interest;
}
public void setInterest(String interest) {
this.interest = interest;
if(interest != null){
interestArr = interest.split(", ");
}
}
4.1 编写功能:dao、service、web、jsp页面
4.1.1 编写mapper接口(dao)
代码语言:javascript复制package com.Maynor.dao;
import com.Maynor.domain.User;
import tk.mybatis.mapper.common.Mapper;
public interface UserMapper extends Mapper<User> {
}
4.1.2 编写service接口
代码语言:javascript复制package com.Maynor.service;
import com.Maynor.domain.User;
import java.util.List;
public interface UserService {
public List<User> findAll();
}
4.1.3 编写service实现类
代码语言:javascript复制package com.Maynor.service.impl;
import com.Maynor.dao.UserMapper;
import com.Maynor.domain.User;
import com.Maynor.service.UserService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import tk.mybatis.mapper.common.Mapper;
import javax.annotation.Resource;
import java.util.List;
@Service(value = "userServiceImpl")
@Transactional
public class UserServiceImpl implements UserService {
@Resource
private UserMapper userMapper;
@Override
public List<User> findAll() {
List<User> users = userMapper.selectAll();
return users;
}
}
4.1.4 编写Controller
代码语言:javascript复制package com.Maynor.controller;
import com.Maynor.domain.User;
import com.Maynor.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
import java.util.List;
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/findAllUsers.action")
public String findAll(Model model){
List<User> userList = userService.findAll();
model.addAttribute("userList", userList);
return "/user/list.jsp";
}
}
4.1.5 编写jsp
List.jsp
Left.jsp
代码语言:javascript复制${pageContext.request.contextPath}/findAllUsers.action
4.2 编写配置类
4.2.1 spring配置类
代码语言:javascript复制package com.Maynor.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
import javax.sql.DataSource;
//配置类
@Configuration
//要扫描的包
@ComponentScan(basePackages = {"com.Maynor"})
//开启事务支持
@EnableTransactionManagement
//读取properties配置文件
@PropertySource(value = "classpath:db.properties")
public class SpringConfig {
//4.2.4 读取properties的固定代码
@Bean
public static PropertySourcesPlaceholderConfigurer create(){
return new PropertySourcesPlaceholderConfigurer();
}
//读取数据库中的相关配置
@Value("${jdbc.driver}")
private String driverClass;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
//设置德鲁伊连接池
@Bean
public DataSource dataSource(){
DruidDataSource dataSource = new DruidDataSource();
dataSource.setPassword(password);
dataSource.setUsername(username);
dataSource.setUrl(url);
dataSource.setDriverClassName(driverClass);
return dataSource;
}
//开启事务管理器
@Bean
@Resource
public DataSourceTransactionManager txManager(DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
}
4.2.2 mybatis配置类
代码语言:javascript复制package com.Maynor.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.transaction.annotation.TransactionManagementConfigurer;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
import javax.sql.DataSource;
//配置类
@Configuration
//要扫描的包
@ComponentScan(basePackages = {"com.Maynor"})
//开启事务支持
@EnableTransactionManagement
//读取properties配置文件
@PropertySource(value = "classpath:db.properties")
public class SpringConfig {
//4.2.4 读取properties的固定代码
@Bean
public static PropertySourcesPlaceholderConfigurer create(){
return new PropertySourcesPlaceholderConfigurer();
}
//读取数据库中的相关配置
@Value("${jdbc.driver}")
private String driverClass;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
//设置德鲁伊连接池
@Bean
public DataSource dataSource(){
DruidDataSource dataSource = new DruidDataSource();
dataSource.setPassword(password);
dataSource.setUsername(username);
dataSource.setUrl(url);
dataSource.setDriverClassName(driverClass);
return dataSource;
}
//开启事务管理器
@Bean
@Resource
public DataSourceTransactionManager txManager(DataSource dataSource){
return new DataSourceTransactionManager(dataSource);
}
}
4.2.3 spring mvc 配置类【无内容】
代码语言:javascript复制package com.Maynor.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
//声明为配置类
@Configuration
//设置扫描 controller
@ComponentScan("com.Maynor.controller")
public class SpringMvcConfig {
}
4.2.4 web启动配置类【新内容】
传统Web项目中,程序的入口是web.xml文件。
在spring4中提供WebApplicationInitializer接口,表示服务器启动初始化。也就是说接口实现类中编写的内容,就是web.xml文件中配置的内容。
类或方法 | 描述 |
---|---|
AnnotationConfigWebApplicationContext | WEB环境下spring工厂 |
servletContext.addFilter(name , Class) | 添加过滤器,等效 |
servletContext.addServlet(name , Class) | 添加servlet,等效 |
过滤器相关方法 ServletRegistration.Dynamic | 描述 |
---|---|
addMapping(urlPatterns) | 追加过滤路径 |
setLoadOnStartup(int) | 设置启动顺序 |
过滤器相关方法 FilterRegistration.Dynamic | 描述 |
---|---|
addMappingForUrlPatterns(null, isMatchAfter, urlPatterns) | 追加过滤路径参数2:参数3:路径 |
package com.Maynor.config;
import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.DispatcherServlet;
import javax.servlet.FilterRegistration;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
public class WebInitializer implements WebApplicationInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
//1.初始化 Spring 容器
AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
applicationContext.register(SpringMvcConfig.class);
applicationContext.register(SpringConfig.class);
applicationContext.register(MybatisConfig.class);
applicationContext.setServletContext(servletContext);
//2.设置核心控制器
ServletRegistration.Dynamic ds = servletContext.addServlet("springmvc", new DispatcherServlet(applicationContext));
ds.addMapping("*.action");
ds.setLoadOnStartup(2);
//3 post乱码配置
FilterRegistration.Dynamic encodingFilter = servletContext.addFilter("CharacterEncodingFilter", new CharacterEncodingFilter("UTF-8"));
encodingFilter.addMappingForUrlPatterns(null, true, "/*");
}
}
4.3 测试
启动项目,点击用户管理 可以看到如下效果即可.
5. 视图 解析器
5.1 分析
5.2 修改代码
l 其他代码与“查询所有”案例相同,不同内容如下:
5.2.1 编写控制器
l 业务控制器返回“视图”名称
代码语言:javascript复制@Controller
@RequestMapping("/user")
public class ItemsController {
@RequestMapping("/itemsList")
public String itemsList(Model model) throws Exception {
//1 模拟数据
List<Items> list = new ArrayList<Items>();
list.add(new Items("联想笔记本", 6999f, "ThinkPad T430 联想笔记本电脑!"));
list.add(new Items("苹果手机", 8800f, "iphone X 苹果手机!"));
//设置数据
model.addAttribute("list", list);
return "itemslist"; //"/WEB-INF/jsp/itemslist.jsp";
}
}
5.2.2 配置视图解析器
代码语言:javascript复制@Configuration
@ComponentScan("com.Maynor.controller")
public class MVCConfiguration {
@Bean
public InternalResourceViewResolver viewResolver(){
InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
viewResolver.setPrefix("/WEB-INF/jsp/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
6. SSM整合:改造UMS(添加视图解析器)
7. 参数 绑定
7.1 简单数据类型
l 在控制器的方法中,只要有对应的参数名,spring mvc就可以自动完成参数封装。
7.1.1 支持的数据类型
l 参数类型推荐使用包装数据类型,因为基础数据类型不可以为null,此时进行访问没有设置参数,程序抛异常。
| 数据类型 |
|:----|
| 整型:Integer、int |
| 字符串:String |
| 单精度:Float、float |
| 双精度:Double、double |
| 布尔型:Boolean、boolean |
7.1.2 @RequestParam
l 如果请求参数名和方法参数名不一致时,需要使用@RequestParam标记对应关系。
l 如果类型是基本类型,此时没有参数,默认抛异常。
解决方案1:可以设置默认值。
解决方案2:可以设置成 包装类型
7.2 绑定POJO类型
代码语言:javascript复制JSP页面
<form action="${pageContext.request.contextPath}/user/additems.action" method="post">
姓名:<input type="text" name="name"/> <br/>
价格:<input type="text" name="price"/> <br/>
<input type="submit" value="提交" />
</form>
控制器:
@Controller
@RequestMapping("/user")
public class ItemsController {
@RequestMapping("additems")
public String addItems(Items items){
System.out.println(items);
return "itemslist";
}
}
l 分析
l 注意:数据不能是日期,日期必须采用自定义参数绑定。
7.3 POST中文乱码
代码语言:javascript复制在web.xml文件中
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
我们采用web启动配置类的方式
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
//1 初始化spring容器
AnnotationConfigWebApplicationContext appliation = new AnnotationConfigWebApplicationContext();
appliation.register(MVCConfiguration.class);
appliation.setServletContext(servletContext);
//2 post乱码配置
FilterRegistration.Dynamic encodingFilter = servletContext.addFilter("CharacterEncodingFilter", new CharacterEncodingFilter("UTF-8"));
encodingFilter.addMappingForUrlPatterns(null, true, "/*");
//3 前端控制器
ServletRegistration.Dynamic springMvcServlet = servletContext.addServlet("springmvc", new DispatcherServlet(appliation));
springMvcServlet.addMapping("*.action");
springMvcServlet.setLoadOnStartup(2);
}
7.4 绑定包装POJO
代码语言:javascript复制提供JavaBean:QueryVo
public class QueryVo {
private Items items;
public Items getItems() {
return items;
}
public void setItems(Items items) {
this.items = items;
}
}
修改控制器
@RequestMapping("findall")
public String findAll(QueryVo queryVo){
System.out.println(queryVo.getItems());
return "itemslist";
}
JSP页面
<form action="${pageContext.request.contextPath}/user/findall.action" method="post">
姓名:<input type="text" name="items.name"/> <br/>
价格:<input type="text" name="items.price"/> <br/>
<input type="submit" value="提交findall" />
</form>
7.5 自定义参数绑定
由于日期数据有很多种格式,所以springmvc没办法把字符串转换成日期类型(不够智能,2019/01/01这种格式可以自动转,2019-01-01这种格式就不能了)。所以需要自定义参数绑定。
代码语言:javascript复制JavaBean
public class QueryVo {
private Items items;
private Date createDate;
JSP页面
<form action="${pageContext.request.contextPath}/user/findall2.action" method="post">
姓名:<input type="text" name="items.name"/> <br/>
价格:<input type="text" name="items.price"/> <br/>
日期:<input type="text" name="createDate"/> <br/>
<input type="submit" value="提交findall2" />
</form>
控制器
@RequestMapping("findall2")
public String findAll2(QueryVo queryVo){
System.out.println(queryVo.getItems());
System.out.println(queryVo.getCreateDate());
return "itemslist";
}
方式一:
1. 在MVCConfig类上添加@EnableWebMvc 注解
2. 在实体类上添加注解@DateTimeFormat
代码语言:javascript复制JavaBean
public class QueryVo {
private Items items;
private Date createDate;
JSP页面
<form action="${pageContext.request.contextPath}/user/findall2.action" method="post">
姓名:<input type="text" name="items.name"/> <br/>
价格:<input type="text" name="items.price"/> <br/>
日期:<input type="text" name="createDate"/> <br/>
<input type="submit" value="提交findall2" />
</form>
控制器
@RequestMapping("findall2")
public String findAll2(QueryVo queryVo){
System.out.println(queryVo.getItems());
System.out.println(queryVo.getCreateDate());
return "itemslist";
}
7.6 绑定数组
代码语言:javascript复制JavaBean
public class QueryVo {
private Items items;
private Date createDate;
JSP页面
<form action="${pageContext.request.contextPath}/user/findall2.action" method="post">
姓名:<input type="text" name="items.name"/> <br/>
价格:<input type="text" name="items.price"/> <br/>
日期:<input type="text" name="createDate"/> <br/>
<input type="submit" value="提交findall2" />
</form>
控制器
@RequestMapping("findall2")
public String findAll2(QueryVo queryVo){
System.out.println(queryVo.getItems());
System.out.println(queryVo.getCreateDate());
return "itemslist";
}
7.7 表单数据绑定到List
代码语言:javascript复制JavaBean
public class QueryVo {
private Items items;
private Date createDate;
JSP页面
<form action="${pageContext.request.contextPath}/user/findall2.action" method="post">
姓名:<input type="text" name="items.name"/> <br/>
价格:<input type="text" name="items.price"/> <br/>
日期:<input type="text" name="createDate"/> <br/>
<input type="submit" value="提交findall2" />
</form>
控制器
@RequestMapping("findall2")
public String findAll2(QueryVo queryVo){
System.out.println(queryVo.getItems());
System.out.println(queryVo.getCreateDate());
return "itemslist";
}
8. @RequestMapping
8.1 多路径映射
l 同时设置多个路径
代码语言:javascript复制@RequestMapping(value={"/index","/index2"})
public String index(){
return "itemslist";
}
http://localhost:8080/spring_mvc_day01_05/user/index.action
http://localhost:8080/spring_mvc_day01_05/user/index2.action
//都可以访问
8.2 窄化请求路径
@RequestMapping放在类名上边,设置请求前缀
@RequestMapping放在方法名上边,设置方法对应请求路径。
完整请求:前缀 请求路径
8.3 请求方法限定
l 限定GET方法 @RequestMapping(method = RequestMethod.GET) l 限定POST方法 @RequestMapping(method = RequestMethod.POST) l GET和POST都可以 @RequestMapping(method={RequestMethod.GET,RequestMethod.POST})
9. Controller方法返回值
9.1 返回ModelAndView
controller方法中定义ModelAndView对象并返回,对象中可添加model数据、指定view。
代码语言:javascript复制@RequestMapping("/findById")
public ModelAndView findById(){
ModelAndView modelAndview = new ModelAndView();
//设置数据
modelAndview.addObject("id", "猜猜看");
//设置视图
modelAndview.setViewName("itemslist");
return modelAndview;
}
9.2 返回void
如果方法返回void,有3种情况:request请求转发、response重定向、给前端响应Json
代码语言:javascript复制请求转发
@RequestMapping("/findById2")
public void findById2(HttpServletRequest request , HttpServletResponse response)
throws ServletException, IOException{
request.getRequestDispatcher("/index.jsp").forward(request, response);
}
重定向
@RequestMapping("/findById3")
public void findById3(HttpServletRequest request , HttpServletResponse response)
throws ServletException, IOException{
response.sendRedirect(request.getContextPath() "/index.jsp");
}
Json 处理
@RequestMapping("/findById4")
public void findById4(HttpServletRequest request , HttpServletResponse response)
throws ServletException, IOException{
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json;charset=UTF-8");
String jsonStr = "{"username":"jack"}";
response.getWriter().write(jsonStr);
}
9.3 返回字符串
9.3.1 逻辑视图名
controller方法返回字符串可以指定逻辑视图名,通过视图解析器解析为物理视图地址。
代码语言:javascript复制@RequestMapping(value={"/index","/index2"})
public String index(){
return "itemslist";
}
9.3.2 Redirect重定向
Contrller方法返回结果重定向到一个url地址,如下商品修改提交后重定向到商品查询方法,参数无法带到商品查询方法中。
代码语言:javascript复制return "redirect:其他路径";
@RequestMapping("/update")
public String update() throws ServletException, IOException{
return "redirect:queryItem.action";
}
9.3.3 forward转发
controller方法执行后继续执行另一个controller方法,如下商品修改提交后转向到商品修改页面,修改商品的id参数可以带到商品修改方法中。
代码语言:javascript复制return "forward:其他路径";
@RequestMapping("/updateSubmit")
public String updateSubmit() throws ServletException, IOException{
return "forward:editItem.action";
}
10. 异常处理器
10.1 异常处理器分析
10.2 自定义异常
代码语言:javascript复制public class CustomException extends Exception {
private static final long serialVersionUID = 8222256702797084775L;
public CustomException() {
super();
}
public CustomException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
public CustomException(String message, Throwable cause) {
super(message, cause);
}
public CustomException(String message) {
super(message);
}
public CustomException(Throwable cause) {
super(cause);
}
}
10.3 异常处理器编写
代码语言:javascript复制public class CustomException extends Exception {
private static final long serialVersionUID = 8222256702797084775L;
public CustomException() {
super();
}
public CustomException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
super(message, cause, enableSuppression, writableStackTrace);
}
public CustomException(String message, Throwable cause) {
super(message, cause);
}
public CustomException(String message) {
super(message);
}
public CustomException(Throwable cause) {
super(cause);
}
}
10.4 异常页面
代码语言:javascript复制<body>
您的操作出现错误如下:<br/>
${message }
</body>
10.5 测试程序
代码语言:javascript复制@Controller
@RequestMapping("/user")
public class ItemsController {
@RequestMapping("index")
public String index(String id) throws CustomException{
if(id == null){
throw new CustomException("没有id参数");
}
return "itemslist";
}
}
<a href="${pageContext.request.contextPath}/user/index.action">异常演示</a><br/>
异常演示
11. 上传图片
11.1 单图片上传
11.1.1 JSP页面
代码语言:javascript复制<form id="itemForm" action="${pageContext.request.contextPath }/user/upload.action" method="post" enctype="multipart/form-data">
姓名:<input type="text" name="name"/> <br/>
价格:<input type="text" name="price"/> <br/>
图片:<input type="file" name="picFile"/> <br/>
<input type="submit" value="提交" />
</form>
11.1.2 文件上传解析器
代码语言:javascript复制<form id="itemForm" action="${pageContext.request.contextPath }/user/upload.action" method="post" enctype="multipart/form-data">
姓名:<input type="text" name="name"/> <br/>
价格:<input type="text" name="price"/> <br/>
图片:<input type="file" name="picFile"/> <br/>
<input type="submit" value="提交" />
</form>
l 使用的commons-fileupload完成上传,确定导入fileupload jar包
代码语言:javascript复制<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.3</version>
</dependency>
11.1.3 Controller实现
需要使用MultipartFile类型表示一个文件上传对象。
方法名 | 描述 |
---|---|
String getOriginalFilename() | 获得原始上传文件名 |
transferTo(File file) | 将上传文件转换到一个指定的文件中 |
String getContentType() | 获取文件MIME类型,如image/pjpeg、text/plain等 |
String getName() | 获取表单中文件组件的名字 |
代码语言:javascript复制 @RequestMapping("upload")
public String upload(String name,Double price,
@RequestParam(required=false,value="picFile") MultipartFile picFile) throws Exception{
System.out.println("姓名:" name);
System.out.println("价格:" price);
String originalFileName = picFile.getOriginalFilename();
System.out.println("上传文件名:" originalFileName);
//保存文件到指定的位置
File file = new File("D:\temp", originalFileName);
picFile.transferTo(file);
return "itemslist";
}
11.2 多图片上传
11.2.1 JSP页面
代码语言:javascript复制<form id="itemForm" action="${pageContext.request.contextPath }/user/upload2.action"
method="post" enctype="multipart/form-data">
姓名:<input type="text" name="name"/> <br/>
价格:<input type="text" name="price"/> <br/>
图片:<input type="file" name="picFile"/> <br/>
图片:<input type="file" name="picFile"/> <br/>
<input type="submit" value="提交" />
</form>
11.2.2 JavaBean
代码语言:javascript复制public class QueryVo {
private String name;
private Double price;
public List<MultipartFile> picFile;
//getter and setter
11.2.3 Controller实现
代码语言:javascript复制@RequestMapping("upload2")
public String upload2(QueryVo queryVo) throws Exception{
System.out.println("姓名:" queryVo.getName());
System.out.println("价格:" queryVo.getPrice());
System.out.println("上传文件个数:" queryVo.getPicFile().size());
for(MultipartFile picFile : queryVo.getPicFile()){
String originalFileName = picFile.getOriginalFilename();
System.out.println("上传文件名:" originalFileName);
//保存文件到指定的位置
File file = new File("D:\temp", originalFileName);
picFile.transferTo(file);
}
return "itemslist";
}
12. JSON数据交互
12.1 概述
@RequestBody:将json、xml 等内容 转换 成Java对象。
@ResponseBody:将Java对象 转换 成 json、xml等内容。
12.2 前端发送ajax请求,后端获取json数据
需求:
前端发送ajax请求,后端通过VO自动获取数据打印
代码语言:javascript复制 前端代码:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<script src="${pageContext.request.contextPath}/js/jquery-3.3.1.js"></script>
<script>
$(function () {
var url = "${pageContext.request.contextPath}/tJson.action";
var params={
"name":"zhangsan",
"price":"123"
}
var callBack=function (rel) {
//后端有返回结果 就会弹窗显示, 没有就不会弹窗
alert(rel.name " " rel.price)
}
//发射
$.post(url,params,callBack,"json")
})
</script>
</head>
<body>
页面加载完毕就发射ajax
</body>
</html>
后端代码:
Qvo
public class QVo {
private String name;
private Double price;
....
}
Controller
@RequestMapping("/tJson.action")
public String testJson(QVo qvo){
//查看前端传递的json 自动转化的VO结果
System.out.println(qvo);
return "/show04.jsp";//随便转发到一个页面,不影响测试结果.
}
测试结果:
12.3 后端给前端响应Json数据.
需求:
跟上一个例子类似, 前端发送请求给后端, 后端接收数据后给前端再相应回一个json数据.
该例子中,需要直接把java对象通过SpringMvc自动转化成json数据. 需要使用两个东西完成.
1. 导入Jackson-databind坐标
2. 在方法的返回值上使用@ResponseBody注解.
具体代码如下:
代码语言:javascript复制Pom文件坐标
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.7</version>
</dependency>
Controller代码:
@RequestMapping("tj.action")
public @ResponseBody QVo getInfo(String name,Double price){
System.out.println("接收到前端数据:" name " " price);
//创建一个对象, 通过SpringMvc自动把这个对象转化成Json响应给前端
QVo qVo = new QVo("lisiguang", 220.4);
return qVo;
}
前端:
<script src="${pageContext.request.contextPath}/js/jquery-3.3.1.js"></script>
<script>
$(function () {
var url = "${pageContext.request.contextPath}/tj.action";
var params={
"name":"zhangsan",
"price":"123"
}
var callBack=function (rel) {
//后端有返回结果 就会弹窗显示, 没有就不会弹窗
alert(rel.name " " rel.price)
}
//发射
$.post(url,params,callBack,"json")
})
</script>
测试结果:
后端:
前端:
13. RESTful支持
13.1 什么是RESTful
Restful就是一个资源定位及资源操作的风格。不是标准也不是协议,只是一种风格,是对http协议的诠释。 l 资源定位:每一个URL都是一个资源。要求url中没有动词,只有名词。没有参数 Url格式:http://blog.csdn.net/beat_the_world/article/details/45621673 l 资源操作:通过HTTP请求方式确定不同的操作。 get查询资源、post新建资源(也可以修改资源)、put更新资源、delete删除资源。 一般使用时还是post和get。 @RequestMapping(value="/viewItems/{id}" , method= RequestMethod.GET ) l RESTful初体验 在URL中包含操作的数据,而不是通过参数进行传递。
13.2 添加jar包
13.3 修改web.xml,支持RESTful
代码语言:javascript复制 <!-- 前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
13.4 JSP页面
代码语言:javascript复制<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-1.12.4.js"></script>
<script type="text/javascript">
$(function(){
alert("静态资源(js)可以使用");
});
</script>
</head>
<body>
<a href="${pageContext.request.contextPath}/user/viewItems/1">查询id=1</a><br/>
<a href="${pageContext.request.contextPath}/user/viewItems/999.action">查询id=999</a><br/>
</body>
13.5 Controller实现
代码语言:javascript复制通过@RequestMapping可以设置URL模板模式映射。 @RequestMapping(value="/ viewItems/{xxx}") ,{xxx}相当于占位符,可以匹配到/viewItems/1、/viewItems/2 等路径 xxx就是占位符的名称,用于方法参数获得匹配到的数据 通过@PathVariable(“xxx”) 获得从路径匹配到的对应数据
@RequestMapping("/viewItems/{id}")
public String viewItems(@PathVariable("id") String id , Model model) {
model.addAttribute("id", id);
return "itemslist";
}
13.6 静态资源问题及解决
l 当程序运行时,首页的js代码将不能执行。
代码语言:javascript复制原因:DispatcherServlet中设置url-pattern为 /,静态资源不能成功访问。 解决:配置 mvc:resources
<!-- 确保所有注解正常使用 -->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 静态资源访问 -->
<mvc:resources location="/js/" mapping="/js/*"></mvc:resources>
14. 拦截器
14.1 概述
Spring Web MVC 的处理器拦截器类似于Servlet 开发中的过滤器Filter,用于对处理器执行前后进行处理。
自定义连接性需要实现接口:HandlerInterceptor
14.2 分析
方法名 | 描述 |
---|---|
boolean preHandle() | 在处理器(控制器)前执行。返回一个boolean值。true:继续执行处理器。false:程序直接结束。 |
void postHandle() | 在处理器方法执行后,视图显示前执行。 |
void afterCompletion() | 在视图解析成功后执行。 |
14.3 自定义 拦截器
14.3.1 JSP页面,测试入口
代码语言:javascript复制<a href="${pageContext.request.contextPath}/user/index.action">拦截器演示</a><br/>
14.3.2 控制器,测试程序
代码语言:javascript复制@Controller
@RequestMapping("/user")
public class ItemsController {
@RequestMapping("index")
public String index(String id) {
System.out.println("2.controller");
return "itemslist";
}
}
14.3.3 拦截器实现类
代码语言:javascript复制package com.Maynor.interceptor;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class MyInterceptor1 implements HandlerInterceptor {
/*
* 在方法执行之前执行
* 如果返回true 继续执行下一个拦截器
* 如果返回false,请求被终止
* @param request
* @param response
* @param handler
* @return
* @throws Exception
*/
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("MyInterceptor1拦截器的preHandle");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("MyInterceptor1拦截器的postHandle");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("MyInterceptor1拦截器的afterCompletion");
}
}
14.3.4 注册拦截器
拦截器编写完成之后,需要在SpringMVCConfiguration配置文件中注册
注册步骤:
1 SpringMVCConfiguration实现WebMvcConfigurerAdapter
2 重写AddInterceptors方法
代码语言:javascript复制public class SpringMvcConfig extends WebMvcConfigurerAdapter {
@Autowired
private MyInterceptor1 myInterceptor1;
@Override
public void addInterceptors(InterceptorRegistry registry) {
InterceptorRegistration interceptorRegistration1 = registry.addInterceptor(myInterceptor1);
interceptorRegistration1.addPathPatterns("/*");
}
//.....
}
14.3.5 执行结果
14.4 多拦截器配置
14.4.1 分析
14.4.2 拦截器实现类
代码语言:javascript复制package com.Maynor.interceptor;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@Component
public class MyInterceptor2 implements HandlerInterceptor {
/*
* 在方法执行之前执行
* 如果返回true 继续执行下一个拦截器
* 如果返回false,则程序终止
* @param request
* @param response
* @param handler
* @return
* @throws Exception
*/
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("MyInterceptor2拦截器的preHandle");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("MyInterceptor2拦截器的postHandle");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("MyInterceptor2拦截器的afterCompletion");
}
}
14.4.3 注册 拦截器
代码语言:javascript复制@Resource
private MyInterceptor1 myInterceptor1;
@Resource
private MyInterceptor2 myInterceptor2;
@Override
public void addInterceptors(InterceptorRegistry registry) {
//拦截全部
InterceptorRegistration interceptorRegistration2 = registry.addInterceptor(myInterceptor2);
interceptorRegistration2.addPathPatterns("/*");
//拦截全部
InterceptorRegistration interceptorRegistration = registry.addInterceptor(myInterceptor1);
interceptorRegistration.addPathPatterns("/*");
}
14.4.4 执行结果
15. 附录
用到的相关配置文件
15.1 SpringMVC01_pom
SpringMVC入门案例1的pom文件核心代码
Pom.xml文件
代码语言:javascript复制<properties>
<org.springframework.version>4.2.4.RELEASE</org.springframework.version>
</properties>
<dependencies>
<!-- spring start -->
<!--spring core start-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring core end-->
<!--spring aop start-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spirng aop end-->
<!--spring aspects start-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring aspects end-->
<!--spring instrumentation start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-instrument</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring instrumentation end-->
<!--spring messaging start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring messaging end-->
<!--spring data access start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring data access end-->
<!--spring web start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-websocket</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc-portlet</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring web end -->
<!--spring test start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<!--spring test end -->
<!-- spring end -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>3.7.5</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<!-- jdk版本插件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
<showWarnings>true</showWarnings>
</configuration>
</plugin>
<!-- tomcat7插件 -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.1</version>
<configuration>
<port>8080</port>
<server>tomcat7</server>
</configuration>
</plugin>
后记