聊聊@RequestBody和Json之间的关系

    @RequestMapping(value="/queryAccountList.do",produces="application/json;charset=UTF-8")
    @ResponseBody
    public HashMap<String, Object> queryAccountList(@RequestBody Map<String, Object> paramsMap){
        System.out.println("paramsMap="+paramsMap);
        String  channel= (String) paramsMap.get("channel");
        String function_code=(String) paramsMap.get("function_code");
        Map<String, Object> reqParam=(Map<String, Object>)paramsMap.get("data");

var person={“name”:”zhangsan”,”sex”:”男”,”age”:”24”}//json对象
var person='{“name”:”zhangsan”,”sex”:”男”,”age”:”24”}';//json字符串

var person={"name":"zhangsan","sex":"男","age":"24"};//json对象
var personString = JSON.stringify(person);
alert(personString);

<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.51</version>
</dependency>

@Data
public class Student {
    private String id;
    private String name;
    private int age;
    private String sex;
@Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }
}

public static void main(String[] args) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        Student student = new Student();
        student.setName("good");
        String s = mapper.writeValueAsString(student);
        System.out.println(s);
        Student hd2 = mapper.readValue(s, Student.class);
        System.out.println(hd2);
    }

@Data
public class Student {
    private String id;
    private String name;
    private int age;
    private String sex;
    private HomeData homeData;
    private BigDecimal salary;
    private String[] tel;
    @Override
    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }
    @Data
    public static class HomeData{
        private Address address;
        @Override
        public String toString() {
            return ToStringBuilder.reflectionToString(this);
        }
        @Data
        public static class Address {
            private String country;
            private String city;
            @Override
            public String toString() {
                return ToStringBuilder.reflectionToString(this);
            }
        }
    }
}

public static void main(String[] args) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        Student student = new Student();
        Student.HomeData homeData = new Student.HomeData();
        Student.HomeData.Address address = new Student.HomeData.Address();
        address.setCountry("中国");
        address.setCity("上海");
        homeData.setAddress(address);
        student.setHomeData(homeData);
        String s = mapper.writeValueAsString(address);
        System.out.println(s);
        Student.HomeData.Address hd2 = mapper.readValue(s, Student.HomeData.Address.class);
        System.out.println(hd2);
    }