spring mvc 返回Json
1 pom文件中 添加
spring 框架的jar 4.1.2 版本
<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>4.1.2.RELEASE</version>
</dependency>
jackson json jar 包
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-core-asl -->
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-core-asl</artifactId>
<version>1.9.13</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.3</version>
</dependency>
springmvc-servlet.xml 配置
好多人说需要加入以下配置，但是我没加，也是运行正常，能返回jason格式的数据
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json;charset=UTF-8</value>
</list>
</property>
<?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: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.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"
>
<!-- scan the package and the sub package -->
<context:component-scan base-package="com.maven01.*"/>
<!-- don't handle the static resource -->
<mvc:default-servlet-handler />
<!-- if you use annotation you must configure following setting -->
<mvc:annotation-driven />
<!-- 对静态资源的处理 ，不需要dispatcher servelet-->
<mvc:resources mapping="/static/**" location="/static/"/>
<!-- configure the InternalResourceViewResolver -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
id="internalResourceViewResolver">
<!-- 前缀 -->
<property name="prefix" value="/WEB-INF/view/" />
<!-- 后缀 -->
<property name="suffix" value=".jsp" />
</bean>
</beans>
controller 的代码
package com.maven01.controller;
import java.util.ArrayList;
import java.util.List;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.maven01.dto.*;
@Controller
@RequestMapping("/mvc")
public class DemoController {
@RequestMapping("/index")
public String hello(){
return "index";
}
@RequestMapping(method=RequestMethod.GET, value="/getUser",produces="application/json")
public @ResponseBody List<UserDto> getUser(){
ArrayList<UserDto> resultList=new ArrayList<UserDto>();
for(int i=0;i<100;i++)
{
UserDto user=new UserDto(i,String.format("hbb0b0-%s", i+""));
resultList.add(user);
}
return resultList;
}
}
运行效果
