SpringBoot 项目实现

1. 创建模块 springboot-webmvc

2. 添加 maven 依赖，设置打包方式，引入打包插件

代码语言：javascript复制

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactId>dive-in-spring-boot</artifactId>
        <groupId>com.imooc</groupId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>springboot-webmvc</artifactId>
    <packaging>war</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

3. 创建引导类

代码语言：javascript复制

package com.imooc.webmvc.bootstrap;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * Spring Boot Web MVC 引导类
 */
@SpringBootApplication(scanBasePackages = "com.imooc.webmvc")
public class SpringBootWebMvcBootstrap {
    public static void main(String[] args) {
        SpringApplication.run(SpringBootWebMvcBootstrap.class, args);
    }
}

4. 创建 Controller 和切面通知、异常处理

代码语言：javascript复制

package com.imooc.webmvc.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

@Controller
public class HelloWorldController {

    @RequestMapping("")
    public String index(@RequestParam int value) {
        return "index";
    }

}

代码语言：javascript复制

package com.imooc.webmvc.controller;

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestHeader;

@ControllerAdvice(assignableTypes = HelloWorldController.class)
public class HelloWorldControllerAdvice {

    @ModelAttribute("message")
    public String message() {
        return "Hello World !";
    }

    @ModelAttribute("acceptLanguage")
    public String acceptLanguage(@RequestHeader("Accept-Language") String acceptLanguage) {
        return acceptLanguage;
    }

    @ExceptionHandler(Throwable.class)
    public ResponseEntity<String> onException(Throwable throwable) {
        return ResponseEntity.ok(throwable.getMessage());
    }

}

5. 添加 Spring Web MVC 配置类

代码语言：javascript复制

package com.imooc.webmvc.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Spring Web MVC 配置类
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new HandlerInterceptor() {
            @Override
            public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
                System.out.println("拦截中 ...");
                return true;
            }
        });
    }
}

6. 添加 jsp 文件前后缀配置

• 创建 resources/application.properties 文件

代码语言：javascript复制

spring.mvc.view.prefix=/WEB-INF/jsp/
spring.mvc.view.suffix=.jsp

7. 创建页面文件

• 创建 src/main/webapp/WEB-INF/jsp/index.jsp 文件

代码语言：javascript复制

<jsp:root version="2.0" xmlns:jsp="http://java.sun.com/JSP/Page">
    <body>
    <message>${message}</message>
    <accept-language>${acceptLanguage}</accept-language>
    </body>
</jsp:root>

8. 打包项目

代码语言：javascript复制

mvn -DMaven.test.skip -U clean package

9. 运行项目

代码语言：javascript复制

java -jar target/springboot-webmvc-0.0.1-SNAPSHOT.war

10. 测试

1. 正常测试(http://localhost:8080/?value=1)

1. 异常测试(http://localhost:8080)

打包 http jsp java 腾讯云测试服务

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