SpringMVC--SSM整合

上篇SpringMVC--请求和响应中，我们对SpringMVC的基本使用有了一定的了解，但对于后台开发还差点火候，即数据库交互，接下来通过整合Mybatis来完成SSM三大框架联合运用开发后台

一、项目配置

1. 导入依赖

代码语言：javascript复制

        <!--spring核心容器包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.5</version>
        </dependency>
        <!--spring切面包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.3.5</version>
        </dependency>
        <!--aop联盟包-->
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
        <!--德鲁伊连接池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>
        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</version>
        </dependency>
        <!--springJDBC包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.5</version>
        </dependency>
        <!--spring事务控制包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.3.5</version>
        </dependency>
        <!--spring orm 映射依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>5.3.5</version>
        </dependency>
        <!--Apache Commons日志包-->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>
        <!--log4j2 日志-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-slf4j-impl</artifactId>
            <version>2.14.0</version>
            <scope>test</scope>
        </dependency>
        <!--lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
            <scope>provided</scope>
        </dependency>
        <!--spring test测试支持包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.3.5</version>
            <scope>test</scope>
        </dependency>
        <!--junit5单元测试-->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>5.7.0</version>
            <scope>test</scope>
        </dependency>
        <!--springMVC支持包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.3.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.5</version>
        </dependency>
        <!--jsp 和Servlet  可选-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.3</version>
            <scope>provided</scope>
        </dependency>

        <!--json依赖-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.12.1</version>
        </dependency>
        <!--mybatis 核心jar包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</version>
        </dependency>
        <!--spring mybatis整合包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.3</version>
        </dependency>

加了最后两个MyBatis的依赖

2. 构建项目包

3. log4j配置文件

在resources目录下新建log4j2.xml

内容：

代码语言：javascript复制

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO">
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT">
            <PatternLayout pattern="%d{YYYY-MM-dd HH:mm:ss} [%t] %-5p %c{1}:%L - %msg%n" />
        </Console>
    </Appenders>
    <Loggers>
        <Root level="info">
            <AppenderRef ref="Console" />
        </Root>
    </Loggers>
</Configuration>

4. SpringMVC配置文件

在resources目录下新建springmvc.xml

内容：

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:c="http://www.springframework.org/schema/c"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/util
       http://www.springframework.org/schema/util/spring-util.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
    <!--包扫描 替换自己的包-->
    <context:component-scan base-package="com.aruba"/>

    <!--配置处理器映射器-->
    <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>-->
    <!--配置处理器适配器-->
    <!-- <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>-->
    <!--一个注解替换上面的两个配置-->
    <!--<mvc:annotation-driven>会自动注册RequestMappingHandlerMapping与RequestMappingHandlerAdapter两个Bean-->
    <mvc:annotation-driven/>
    <!--配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/view/"  ></property>
        <property name="suffix" value=".jsp"  ></property>
    </bean>

    <!--静态资源放行-->
<!--    <mvc:resources mapping="/js/**" location="/WEB-INF/js/"></mvc:resources>-->
</beans>

5. jdbc配置文件

在resources目录下新建jdbc.properties，存放jdbc连接信息

内容：

代码语言：javascript复制

jdbc_driver=com.mysql.cj.jdbc.Driver
jdbc_url=jdbc:mysql://127.0.0.1:3306/mydb?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
jdbc_username=root
jdbc_password=root

6. Spring配置文件

resources目录下新建applicationContext.xml，读取jdbc配置文件，并集成MyBatis

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:c="http://www.springframework.org/schema/c"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:util="http://www.springframework.org/schema/util"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/util
       http://www.springframework.org/schema/util/spring-util.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
">
    <!--读取jdbc配置-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--配置连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="username" value="${jdbc_username}"></property>
        <property name="password" value="${jdbc_password}"></property>
        <property name="url" value="${jdbc_url}"></property>
        <property name="driverClassName" value="${jdbc_driver}"></property>
    </bean>

<!--    &lt;!&ndash;配置JDBCTemplate对象,并向里面注入DataSource&ndash;&gt;-->
<!--    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">-->
<!--        &lt;!&ndash;通过set方法注入连接池&ndash;&gt;-->
<!--        <property name="dataSource" ref="dataSource"></property>-->
<!--    </bean>-->

    <!--多个包可以使用,分割-->
    <context:component-scan base-package="com.aruba"/>

    <!--配置一个事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--将数据源注入事务管理器-->
        <property name="dataSource"  ref="dataSource"></property>
    </bean>
    <!--开启事务注解-->
    <tx:annotation-driven transaction-manager="transactionManager"/>

    <!--配置mybatis-->
    <!--配置sqlSessionFactory-->
    <bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource"  ref="dataSource"></property>
        <property name="typeAliasesPackage" value="com.aruba.bean"></property>
    </bean>
    <!--配置MapperScanner 扫描mapper.xml 和接口-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--配置SQLSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="factory"></property>
        <!--扫描mapper-->
        <property name="basePackage" value="com.aruba.mapper"></property>
    </bean>

</beans>

7. 配置web.xml

代码语言：javascript复制

<?xml version="1.0" encoding="UTF-8"?>
<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">
    <!--spring核心配置文件位置-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!--spring Listener-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!--编码过滤器-->
    <filter>
        <filter-name>encFilter</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>
    </filter>
    <filter-mapping>
        <filter-name>encFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!--配置前端控制器-->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--配置springMVC核心配置文件-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!--tomcat启动就初始化-->
        <load-on-startup>1</load-on-startup>
    </servlet>

    <!--映射路径为所有servlet 除jsp-->
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

二、开发业务代码

1. 创建表

使用之间Spring--事务管理中定义的用户表：

2. 创建实体类

代码语言：javascript复制

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User implements Serializable {
    private String name;
    private Integer money;
}

3. 定义Mapper接口和xml映射文件

代码语言：javascript复制

public interface UserMapper {
    /**
     * 根据用户名查找用户
     *
     * @param name
     * @return
     */
    User findUserByUsername(String name);
}

resources下创建同名xml文件：

UserMapper.xml

内容：

代码语言：javascript复制

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.aruba.mapper.UserMapper">

    <!--User findUserByUsername(String name);-->
    <select id="findUserByUsername" resultType="user">
        select *
        from user
        where name = #{name}
    </select>

</mapper>

4. 定义Service接口和实现类

UserService 接口：

代码语言：javascript复制

public interface UserService {
    User findUser(String name);
}

UserServiceImpl 实现类：

代码语言：javascript复制

@Service
@Transactional
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    public User findUser(String name) {
        return userMapper.findUserByUsername(name);
    }
}

5. 实现Controller层代码

代码语言：javascript复制

@Controller
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("login.do")
    @ResponseBody
    public String login(String name) {
        User user = userService.findUser(name);
        if (user != null) {
            return "success";
        }

        return "login failed";
    }
}

6. html编写

代码语言：javascript复制

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
    <form action="login.do">
        用户名：<input type="text" name="name">
        <input type="submit" value="登录">
    </form>
</body>
</html>

测试结果：

项目地址：

https://gitee.com/aruba/spring-mvcstudy.git

jdbc mvc xml mybatis javascript

0 人点赞