var user = {
    name:"邪神",
    age: "18",
    sex:"男"
};
//對(duì)象轉(zhuǎn)為字符串
var json=JSON.stringify(user);

//字符串轉(zhuǎn)對(duì)象
var ob=JSON.parse(json);

console.log(user);
console.log(json);
console.log(ob);

==============================================

@Controller
public class controll {

    @ResponseBody  //不會(huì)進(jìn)過試圖解析器
    @RequestMapping("J1")
    public String jsonTest() throws JsonProcessingException {

        User user = new User("邪神",18,"男");
        ObjectMapper objectMapper = new ObjectMapper();
        String s = objectMapper.writeValueAsString(user);
        return s;
    }
}

<!--    JSON亂碼-->
    <mvc:annotation-driven>
    <mvc:message-converters register-defaults="true">
    <bean class="org.springframework.http.converter.StringHttpMessageConverter">
    <constructor-arg value="UTF-8"/>
    </bean>
    <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
    <property name="objectMapper">
    <bean class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean">
    <property name="failOnEmptyBeans" value="false"/>
    </bean>
    </property>
    </bean>
    </mvc:message-converters>
    </mvc:annotation-driven>