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maven工程中,spring mvc @ResponseBody的使用
1.配置web.xml文件(确保已经导入了spring中的jar包)
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>springmvc</display-name> <servlet> <servlet-name>spring</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <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></web-app>
2.注意到上面的橙红色代码：
<servlet-name>spring</servlet-name>
在默认情况下我们还需要一个 "xxx-servlet.xml" 文件，"xxx"就是<servlet-name>标签中的spring，所以我们需要的文件为(在WEB-INF文件夹下)：spring-servlet.xml
3.spring-servlet.xml的配置如下：
<?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:tx="http://www.springframework.org/schema/tx" 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-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!-- 自动扫描的包名,我的是com.lxw.controller --> <context:component-scan base-package="com.lxw.controller" ></context:component-scan> <!-- 默认的注解映射的支持 --> <mvc:annotation-driven /></beans>
4.在pom.xml中加入如下依赖：
<dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-core-asl</artifactId> <version>1.8.5</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.8.5</version> </dependency>
5.Java代码：
1 package com.lxw.controller; 2 3 import java.util.LinkedList; 4 import java.util.List; 5 6 import org.springframework.stereotype.Controller; 7 import org.springframework.web.bind.annotation.RequestMapping; 8 import org.springframework.web.bind.annotation.ResponseBody; 9 10 @Controller11 public class ResponseBodyAnnotation {12 @RequestMapping(value="http://www.mamicode.com/topics/json")13 @ResponseBody14 public List<Topic> getTextString(){15 System.out.println("Annotation response");16 LinkedList<Topic> topics = new LinkedList<Topic>();17 topics.add(new Topic("a"));18 topics.add(new Topic("b"));19 topics.add(new Topic("c"));20 topics.add(new Topic("d"));21 topics.add(new Topic("e"));22 return topics;23 }24 class Topic{25 private String id;26 public String getId() {27 return id;28 }29 30 public void setId(String id) {31 this.id = id;32 }33 34 public int getFlag() {35 return flag;36 }37 38 public void setFlag(int flag) {39 this.flag = flag;40 }41 42 private int flag = 0;43 44 public Topic(String id) {45 this.id = id;46 }47 48 @Override49 public boolean equals(Object obj) {50 return this.id.equals(((Topic) obj).getId());51 }52 }53 }
6.运行！然后在浏览器中输入："http://localhost:port/projectname/topics/json" , port为端口号,projectname为项目名称.
7.运行过程中如果出现406错误,则可能是没导入json的jar包.http://pan.baidu.com/s/1gdqwNUb(该链接如果失效,请另想办法).
maven工程中,spring mvc @ResponseBody的使用
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