SpringMVC_json数据格式

1.json数据格式

所需jar包

fastjson-1.2.47.jar

jackson-annotations-2.9.2.jar

jackson-core-2.9.2.jar

jackson-databind-2.9.2.jar

（1）配置spring-mvc.xml

<mvc:annotation-driven >

<mvc:message-converters register-defaults="true">

<bean class="

com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">

<property name="supportedMediaTypes">

<list>

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

<value>application/json</value>

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

</list>

</property>

<property name="features">

<list>

<!-- 默认的意思就是不配置这个属性，配置了就不是默认了 -->

<!-- 是否输出值为null的字段 ，默认是false -->

<value>WriteMapNullValue</value>

<value>WriteNullNumberAsZero</value>

<value>WriteNullListAsEmpty</value>

<value>WriteNullStringAsEmpty</value>

<value>WriteNullBooleanAsFalse</value>

<value>WriteDateUseDateFormat</value>

</list>

</property>

</bean>

</mvc:message-converters>

</mvc:annotation-driven>

（2）测试

@RequestMapping(value="json")

@ResponseBody()

//json数据

public Map<String,Object> Json()

{

List<PersonBO> persons = new ArrayList<PersonBO>();

PersonBO person = new PersonBO();

person.setPid("1111");

person.setName("1111");

person.setBirthday(new Date());

persons.add(person);

 

person = new PersonBO();

person.setPid("2222");

person.setName("2222");

person.setBirthday(new Date());

persons.add(person);

 

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

map.put("persons", persons);

return map;

}