SpringMVC整合JSP

深藏阁楼爱情的钟 2022-06-18 08:28 194阅读 0赞

## 使用jsp作为视图（其实推荐是使用thymeleaf作为视图的，但是辛苦配置了那么久，还是记录一下吧。。。） ##

完全基于Java 的配置

工程目录如图

![Center][]

###     ###

### 1. 首先用 mvn 创建一个 webapp 工程，使用pom.xml配置项目和依赖 ###

<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/maven-v4_0_0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.ly</groupId>
      <artifactId>example</artifactId>
      <packaging>war</packaging>
      <version>1.0-SNAPSHOT</version>
      <name>example Maven Webapp</name>
      <url>http://maven.apache.org</url>
      <dependencies>
        
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>4.3.6.RELEASE</version>
        </dependency>
    
        
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>4.3.6.RELEASE</version>
        </dependency>
    
        
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>4.3.6.RELEASE</version>
        </dependency>
    
        
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
          <version>4.3.6.RELEASE</version>
        </dependency>
    
        
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>4.3.6.RELEASE</version>
        </dependency>
    
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>3.8.1</version>
          <scope>test</scope>
        </dependency>
    
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
          <scope>provided</scope>
        </dependency>
    
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
          <scope>runtime</scope>
        </dependency>
    
      </dependencies>
    
      <build>
        <pluginManagement>
          <plugins>
            <plugin>
              <groupId>org.apache.tomcat.maven</groupId>
              <artifactId>tomcat7-maven-plugin</artifactId>
              <version>2.2</version>
            </plugin>
          </plugins>
        </pluginManagement>
    
        <finalName>example</finalName>
      </build>
    </project>

包括springmvc必要的依赖，javax.servlet-api，jstl（一开始不知道要后两个，弄了很久。。）

最后添加 tomcat7 的集成插件

### 2. 定义一个 controller ###

package com.ly.web.controller;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.ModelMap;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    /**
     * Created by Shower on 2017/4/1 0001.
     */
    @Controller
    public class HelloController {
        @RequestMapping(value = "/")
        public String sayHello(ModelMap modelMap) {
            modelMap.put("msg", "Hello!");
            return "hello";
        }
    }

使用@Controller注解进行配置，@RequestMapping进行地址映射，返回 jsp 模板的名称

### 3. 在WEB-INF文件夹下创建views文件夹，并在其中创建hello.jsp ###

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Hello World</title>
    </head>
    <body>
        <h2>Message: ${msg}</h2>
    </body>
    </html>

### 4. SpringMVC配置 ###

package com.ly.web;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.view.InternalResourceViewResolver;
    import org.springframework.web.servlet.view.JstlView;
    
    /**
     * Created by Shower on 2017/4/1 0001.
     */
    @Configuration
    @ComponentScan
    @EnableWebMvc
    public class WebConfig {
        @Bean
        public InternalResourceViewResolver viewResolver() {
            InternalResourceViewResolver viewResolver = new
                    InternalResourceViewResolver();
            viewResolver.setViewClass(JstlView.class);
            viewResolver.setPrefix("/WEB-INF/views/");
            viewResolver.setSuffix(".jsp");
    
            return viewResolver;
        }
    }

@Configuration和@Bean一起用来配置Bean，@ComponentScan用来扫描当前包下用注解配置的Bean，@EnableWebMVC启用注解配置SpringMVC

### 5. 配置DispatcherServlet ###

package com.ly;
    
    import com.ly.business.BusinessConfig;
    import com.ly.web.WebConfig;
    import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
    
    /**
     * Created by Shower on 2017/4/1 0001.
     */
    public class AppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
        protected Class<?>[] getRootConfigClasses() {
            return new Class<?>[] {BusinessConfig.class};
        }
    
        protected Class<?>[] getServletConfigClasses() {
            return new Class<?>[] {WebConfig.class};
        }
    
        protected String[] getServletMappings() {
            return new String[] {"/"};
        }
    }

BusinessConfig.java

package com.ly.business;
    
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    
    /**
     * Created by Shower on 2017/4/1 0001.
     */
    @Configuration
    @ComponentScan
    @EnableWebMvc
    public class BusinessConfig {
    }

### 6. 输入命令 mvn tomcat7:run 运行 ###

访问 http:localhost:8080/example/

![Center 1][]

[Center]: /images/20220618/08fba3d6fc954882a85caf1628c7ee3c.png
[Center 1]: /images/20220618/6721a58e2d644b6385329741248b11ea.png