SrpingMVC 返回JSON

springmvc配置文件需加入

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1. <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />  
2. <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
3.     <property name="messageConverters">  
4.         <list>  
5.             <ref bean="mappingJacksonHttpMessageConverter" />  
6.         </list>  
7.     </property>  
8. </bean>  
9. <bean id="mappingJacksonHttpMessageConverter"  
10.     class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">  
11.     <property name="supportedMediaTypes">  
12.         <list>  
13.             <value>text/html;charset=UTF-8</value>  
14.         </list>  
15.     </property>  
16. </bean>  
17. <context:annotation-config />  

注入springmvc配置文件中不要加入

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1. <!-- 使用注解解析  也就是DefaultAnnotationHandlerMapping  -->  
2. <mvc:annotation-driven/>  

需要2个Jar包

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1. <dependency>  
2.     <groupId>org.codehaus.jackson</groupId>  
3.     <artifactId>jackson-core-asl</artifactId>  
4.     <version>1.8.4</version>  
5. </dependency>  
6. <dependency>  
7.     <groupId>org.codehaus.jackson</groupId>  
8.     <artifactId>jackson-mapper-asl</artifactId>  
9.     <version>1.8.4</version>  
10. </dependency>  

使用如下：

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1. @RequestMapping(value = "/create!save.do")  
2. @ResponseBody  
3. public Object create(@ModelAttribute User user) throws Exception {  
4.     userService.insert(user);  
5.     return user;  
6. }