SpringMVC配置返回JSON数据格式

1.pom.xml

<!-- springmvc转json(注意spring4.x整合的话,jackson版本一定要在2.4以上才行) -->
<dependency>  
    <groupId>com.fasterxml.jackson.core</groupId>  
    <artifactId>jackson-core</artifactId>  
    <version>2.8.9</version>  
</dependency>  
<dependency>  
    <groupId>com.fasterxml.jackson.core</groupId>  
    <artifactId>jackson-databind</artifactId>  
    <version>2.8.9</version>  
</dependency>

2.配置springmvc.xml

<!-- 开启注解扫描 -->
<context:component-scan base-package="com.demo.action" 
<!-- springmvc转json配置 -->
<mvc:annotation-driven></mvc:annotation-driven>

3.action层

@RequestMapping(value="/demo.action")
@ResponseBody
public ReturnObject demo(){
    ReturnObject returnObject = new ReturnObject();
    returnObject.setSuccessMessage("测试数据", Thread.currentThread().getStackTrace()[1].getMethodName());
    return

也可以这么写

@RequestMapping(value="/demo.action")
public @ResponseBody ReturnObject demo(){
    ReturnObject returnObject = new ReturnObject();
    returnObject.setSuccessMessage("测试数据", Thread.currentThread().getStackTrace()[1].getMethodName());      
    return