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工具类
package com.sunfreeter.util;
import com.google.gson.Gson;import com.google.gson.JsonElement;import com.google.gson.JsonObject;import com.google.gson.JsonParser;
/** * * @author freeter * @desc Json封装工具类简洁版 */public class JsonUtil { /**@author 订阅号:sunfreeter * @desc 对象转Json串 * @param object * @return */ public static String toString(Object object){ String jsonString = new Gson().toJson(object); return jsonString; }
/**@author 订阅号:sunfreeter * @desc Json串转自定义对象 * @param jsonString * @param object * @return */ public static <T> T stringToObject(String jsonString,Class<T> object){ T toObject = new Gson().fromJson(jsonString,object); return toObject; }
public static JsonObject stringToJosnObject(String jsonString){ JsonParser jsonParser = new JsonParser(); JsonElement jsonElement = jsonParser.parse(jsonString); JsonObject jsonObject = jsonElement.getAsJsonObject(); return jsonObject; }
public static String jsonObjectToJsonString(JsonObject jsonObject){ return jsonObject.toString(); }
}
测试实体类-MyClass
package com.sunfreeter.model;
import java.util.List;
/** * * @author sunfreeter * @desc 班级 */public class MyClass { private String code; private String name; private List<Student> students;public String getCode() { return code;}public void setCode(String code) { this.code = code;}public String getName() { return name;}public void setName(String name) { this.name = name;}public List<Student> getStudents() { return students;}public void setStudents(List<Student> students) { this.students = students;}}
测试实体类-Student
package com.sunfreeter.model;
/** * * @author sunfreeter * @desc 学生 */public class Student { private String sno; private String sname; private int age;public String getSno() { return sno;}public void setSno(String sno) { this.sno = sno;}public String getSname() { return sname;}public void setSname(String sname) { this.sname = sname;}public int getAge() { return age;}public void setAge(int age) { this.age = age;}}
测试主入口
package com.sunfreeter.app;
import java.util.ArrayList;import java.util.List;
import com.google.gson.JsonObject;import com.sunfreeter.model.MyClass;import com.sunfreeter.model.Student;import com.sunfreeter.util.JsonUtil;
/** * * @author 订阅号:sunfreeter * @desc 测试主入口 */public class Test {
public static void main(String[] args) { Student student=new Student(); student.setSno("s_001"); student.setSname("张三"); student.setAge(20);
Student student1=new Student(); student1.setSno("s_002"); student1.setSname("李四"); student1.setAge(30);
List<Student> list=new ArrayList<Student>(); list.add(student); list.add(student1); MyClass mc=new MyClass(); mc.setCode("c_0001"); mc.setName("一年级"); mc.setStudents(list); String ss=JsonUtil.toString(mc); System.out.println(ss); MyClass myClass = JsonUtil.stringToObject(ss, MyClass.class); System.out.println(myClass.getCode());
JsonObject jsonObject= JsonUtil.stringToJosnObject(ss); System.out.println(jsonObject.get("code").getAsString()); System.out.println(jsonObject.get("students").getAsJsonArray()); String ddd = JsonUtil.jsonObjectToJsonString(jsonObject); System.out.println(ddd); }}
原文地址:https://www.cnblogs.com/zhengjinsheng/p/11269647.html
时间: 2024-08-02 23:37:10