springmvc 用fasterxml.jackson返回son数据

一,引入fasterxm.jackson包

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.6.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.6.3</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.6.3</version>
</dependency>
二，配置spring-servlet.xml

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

        <property name="messageConverters">

            <list>

                <ref bean="mappingJackson2HttpMessageConverter" />

            </list>

        </property>

    </bean>

    <bean id="mappingJackson2HttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">

        <property name="supportedMediaTypes">

            <list>

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

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

                <value>application/json;charset=UTF-8</value>

            </list>

        </property>

    </bean>

三，后台controller类，使用@ReponseBody关键字可以将结果（一个包含字符串和JavaBean的Map），转换成JSON

@Controller  

@RequestMapping("/user")  

public class DemoController {  

  @RequestMapping(value = "/list", method = RequestMethod.GET)  

  @ResponseBody  

  public Map<String, Object> getUserList() {  

    logger.info("列表");  

    List<UserModel> list = new ArrayList<UserModel>();  

    UserModel um = new UserModel();  

    um.setId("1");  

    um.setUsername("sss");  

    um.setAge(222);  

    list.add(um);  

    Map<String, Object> modelMap = new HashMap<String, Object>(3);  

    modelMap.put("total", "1");  

    modelMap.put("data", list);  

    modelMap.put("success", "true");  

    return modelMap;  

  }  

}