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;

}

}

直接在地址栏请求：