Spring MVC JSON

1、web.xml

<!DOCTYPE web-app PUBLIC

 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

 <display-name>Archetype Created Web Application</display-name>

 <!-- Spring 服务层的配置文件 -->

 <context-param>

  <param-name>contextConfigLocation</param-name>

  <param-value>WEB-INF/applicationContext.xml</param-value>

 </context-param>

 <!-- Spring 容器启动监听器 -->

 <listener>

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

 </listener>

 <!-- Spring MVC 的Servlet，它将加载WEB-INF/annomvc-servlet.xml 的 配置文件，以启动Spring MVC模块 -->

 <servlet>

  <servlet-name>dispatcher</servlet-name>

  <servlet-class>org.springframework.web.servlet.DispatcherServlet

  </servlet-class>

  <init-param>

   <param-name>contextConfigLocation</param-name>

   <param-value>WEB-INF/dispatcher-servlet.xml</param-value>

  </init-param>

  <load-on-startup>2</load-on-startup>

 </servlet>

 <servlet-mapping>

  <servlet-name>dispatcher</servlet-name>

  <url-pattern>*.action</url-pattern>

 </servlet-mapping>

</web-app>

2、dispatcher-servlet.xml

<?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:tx="http://www.springframework.org/schema/tx"

 xmlns:aop="http://www.springframework.org/schema/aop"

 xmlns:mvc="http://www.springframework.org/schema/mvc"

 xmlns:task="http://www.springframework.org/schema/task"

 xmlns:cache="http://www.springframework.org/schema/cache"

 xmlns:util="http://www.springframework.org/schema/util"

 xmlns:websocket="http://www.springframework.org/schema/websocket"

 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
                    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd

                    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd

                    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd

                    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd

                    http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-4.1.xsd

                    http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-4.1.xsd

                    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd">

 
 <context:component-scan base-package="com.ruoshi.controller" />

 

 <mvc:annotation-driven/> 

  

 <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->   

 <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">   

     <property name="supportedMediaTypes">   

         <list>   

             <value>text/html;charset=UTF-8</value>   

         </list>   

     </property>   

 </bean>   

  

 <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->   

 <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">   

     <property name="messageConverters">   

         <list>   

             <ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->   

         </list>   

     </property>   

 </bean> 

</beans> 

3、pom.xml

<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>ruoshi</groupId>

 <artifactId>ruoshi</artifactId>

 <packaging>war</packaging>

 <version>0.0.1-SNAPSHOT</version>

 <name>ruoshi Maven Webapp</name>

 <url>http://maven.apache.org</url>

 <properties>

  <jackson.version>2.5.4</jackson.version>

 </properties>

 <dependencies>

  <dependency>

   <groupId>junit</groupId>

   <artifactId>junit</artifactId>

   <version>3.8.1</version>

   <scope>test</scope>

  </dependency>

  <dependency>

   <groupId>org.springframework</groupId>

   <artifactId>spring-webmvc</artifactId>

   <version>4.2.4.RELEASE</version>

  </dependency>

  <dependency>

   <groupId>javax.servlet</groupId>

   <artifactId>javax.servlet-api</artifactId>

   <version>4.0.0-b01</version>

   <scope>test</scope>

  </dependency>

  <dependency>

   <groupId>jstl</groupId>

   <artifactId>jstl</artifactId>

   <version>1.2</version>

  </dependency>

  <dependency>

   <groupId>org.codehaus.jackson</groupId>

   <artifactId>jackson-asl</artifactId>

   <version>0.9.5</version>

  </dependency>

  <dependency>

   <groupId>org.codehaus.jackson</groupId>

   <artifactId>jackson-core-asl</artifactId>

   <version>1.9.13</version>

  </dependency>

  <dependency>

   <groupId>org.codehaus.jackson</groupId>

   <artifactId>jackson-mapper-asl</artifactId>

   <version>1.9.13</version>

  </dependency>

  <dependency>

   <groupId>com.fasterxml.jackson.core</groupId>

   <artifactId>jackson-annotations</artifactId>

   <version>${jackson.version}</version>

  </dependency>

  <dependency>

   <groupId>com.fasterxml.jackson.core</groupId>

   <artifactId>jackson-core</artifactId>

   <version>${jackson.version}</version>

  </dependency>

  <dependency>

   <groupId>com.fasterxml.jackson.core</groupId>

   <artifactId>jackson-databind</artifactId>

   <version>${jackson.version}</version>

  </dependency>

 </dependencies>

 <build>

  <finalName>ruoshi</finalName>

 </build>

</project>

4、Item.java

package com.ruoshi.pojo;

import java.util.Date;

public class Item {

 private Integer id;

 private String name;

 private Float price;

 private String pic;

 private Date createTime;

 private String detail;

 public Integer getId() {

  return id;

 }

 public void setId(Integer id) {

  this.id = id;

 }

 public String getName() {

  return name;

 }

 public void setName(String name) {

  this.name = name;

 }

 public Float getPrice() {

  return price;

 }

 public void setPrice(Float price) {

  this.price = price;

 }

 public String getPic() {

  return pic;

 }

 public void setPic(String pic) {

  this.pic = pic;

 }

 public Date getCreateTime() {

  return createTime;

 }

 public void setCreateTime(Date createTime) {

  this.createTime = createTime;

 }

 public String getDetail() {

  return detail;

 }

 @Override

 public String toString() {

  return "Item [id=" + id + ", name=" + name + ", price=" + price

    + ", pic=" + pic + ", createTime=" + createTime + ", detail="

    + detail + "]";

 }

 public void setDetail(String detail) {

  this.detail = detail;

 }

}

5、JSONController.java
package com.ruoshi.controller;

import java.util.Date;

import java.util.HashMap;

import java.util.LinkedList;

import java.util.List;

import java.util.Map;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.Reque
ab57
stMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import com.ruoshi.pojo.Item;

@Controller

public class JSONController {

 @RequestMapping("/xmlOrJson.action")

 @ResponseBody

 public Map<String, Object> xmlOrJson() {

     Map<String, Object> map = new HashMap<String, Object>();

     List<Item> items = new LinkedList<Item>();

  Item item = new Item();

  item.setCreateTime(new Date(System.currentTimeMillis()));

  item.setId(1);

  item.setPrice(5.1f);

  item.setName("iphone");

  item.setDetail("6s");

  items.add(item);

     map.put("list", items);

     return map;

 }

}

6、http://localhost:8080/ruoshi/xmlOrJson.action

{"list":[{"id":1,"name":"iphone","price":5.1,"pic":null,"createTime":1461205549046,"detail":"6s"}]}