青海网站建设/世界营销大师排名

不得不说这种工具在进行数据封装的时候是真香，使用方法简便，封装功能强大。让我想到了以前GSON的使用，感觉还是阿里巴巴的产品香。

在maven中导入相关的坐标依赖

		<dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.70</version></dependency>

使用时候的Java代码

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** @author shiwen* @date 2020/7/9*/
public class JsonDemo {public static void main(String[] args) {Student student1 = new Student(11, "学生1", 21);Student student2 = new Student(12, "学生1", 22);Student student3 = new Student(13, "学生1", 23);List students = new ArrayList<>();students.add(student1);students.add(student2);students.add(student3);List students2 = new ArrayList<>();students2.add(student1);students2.add(student2);students2.add(student3);// string转json格式，这个是String转json格式类型 ===== 这种是输入string类型的json格式会自动转为json格式System.out.println("stringToJson：" + JSON.parseObject("{\"age\":21,\"id\":11,\"name\":\"学生1\"}"));// JSON.toJSONString是对象转String的Json类型 ===== 这种是对象转json格式System.out.println(JSON.toJSONString("{\"age\":21,\"id\":11,\"name\":\"学生1\"}"));// 这里我们把list集合类型的数据封装成json的string字符串格式 =====// string转json格式System.out.println("stringToJson：" + JSON.toJSONString(students));// json转list集合List<Student> strArray = JSON.parseArray(JSON.toJSONString(students), Student.class);System.out.println("jsonToList：" + strArray);// 单一一个student对象转换成json格式System.out.println("entityToJson：" + JSON.toJSONString(student1));// 使用HashMap进行数据的封装Map<String, Object> map = new HashMap<>();map.put("student1", student1);map.put("student2", student2);map.put("studentList1", JSON.toJSONString(students));map.put("studentList2", JSON.toJSONString(students2));String jsonString = JSON.toJSONString(map);System.out.println("mapToJsonString：" + jsonString);}}class Student{private Integer id;private String name;private Integer age;public Student() {}public Student(Integer id, String name, Integer age) {this.id = id;this.name = name;this.age = age;}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}@Overridepublic String toString() {return "Student{" +"id=" + id +", name='" + name + '\'' +", age=" + age +'}';}}

输出结果

stringToJson：{"name":"学生1","id":11,"age":21}"{\"age\":21,\"id\":11,\"name\":\"学生1\"}"stringToJson：[{"age":21,"id":11,"name":"学生1"},{"age":22,"id":12,"name":"学生1"},{"age":23,"id":13,"name":"学生1"}]jsonToList：[Student{id=11, name='学生1', age=21}, Student{id=12, name='学生1', age=22}, Student{id=13, name='学生1', age=23}]entityToJson：{"age":21,"id":11,"name":"学生1"}mapToJsonString：{"student2":{"age":22,"id":12,"name":"学生1"},"student1":{"age":21,"id":11,"name":"学生1"},"studentList2":"[{\"age\":21,\"id\":11,\"name\":\"学生1\"},{\"age\":22,\"id\":12,\"name\":\"学生1\"},{\"age\":23,\"id\":13,\"name\":\"学生1\"}]","studentList1":"[{\"age\":21,\"id\":11,\"name\":\"学生1\"},{\"age\":22,\"id\":12,\"name\":\"学生1\"},{\"age\":23,\"id\":13,\"name\":\"学生1\"}]"}