2019独角兽企业重金招聘Python工程师标准>>>
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class MainClass {
public static void main(String[] args) {
TestJsonBean();
TestJsonAttribute();
TestJsonArray();
}
@SuppressWarnings("rawtypes")
private static void TestJsonArray() {
Student student1 = new Student();
student1.setId(1);
student1.setName("jag");
student1.setSex("man");
student1.setAge(25);
student1.setHobby(new String[] { "篮球", "游戏" });
Student student2 = new Student();
student2.setId(2);
student2.setName("tom");
student2.setSex("woman");
student2.setAge(23);
student2.setHobby(new String[] { "上网", "跑步" });
List<Student> list = new ArrayList<Student>();
list.add(student1);
list.add(student2);
JSONArray jsonArray = JSONArray.fromObject(list);
System.out.println(jsonArray.toString());
System.out.println("-----------------------");
JSONArray new_jsonArray = JSONArray.fromObject(jsonArray.toArray());
Collection java_collection = JSONArray.toCollection(new_jsonArray);
if (java_collection != null && !java_collection.isEmpty()) {
Iterator it = java_collection.iterator();
while (it.hasNext()) {
JSONObject jsonObj = JSONObject.fromObject(it.next());
Student stu = (Student) JSONObject.toBean(jsonObj,
Student.class);
System.out.println(stu.getName());
}
System.out.println("-----------------------");
}
}
private static void TestJsonAttribute() {
/**
* 创建json对象并为该对象设置属性
*/
JSONObject jsonObj = new JSONObject();
jsonObj.put("Int_att", 25);// 添加int型属性
jsonObj.put("String_att", "str");// 添加string型属性
jsonObj.put("Double_att", 12.25);// 添加double型属性
jsonObj.put("Boolean_att", true);// 添加boolean型属性
// 添加JSONObject型属性
JSONObject jsonObjSon = new JSONObject();
jsonObjSon.put("id", 1);
jsonObjSon.put("name", "tom");
jsonObj.put("JSONObject_att", jsonObjSon);
// 添加JSONArray型属性
JSONArray jsonArray = new JSONArray();
jsonArray.add("array0");
jsonArray.add("array1");
jsonArray.add("array2");
jsonArray.add("array3");
jsonObj.put("JSONArray_att", jsonArray);
System.out.println(jsonObj.toString());
System.out.println("Int_att:" + jsonObj.getInt("Int_att"));
System.out.println("String_att:" + jsonObj.getString("String_att"));
System.out.println("Double_att:" + jsonObj.getDouble("Double_att"));
System.out.println("Boolean_att:" + jsonObj.getBoolean("Boolean_att"));
System.out.println("JSONObject_att:"
+ jsonObj.getJSONObject("JSONObject_att"));
System.out.println("JSONArray_att:"
+ jsonObj.getJSONArray("JSONArray_att"));
System.out.println("-----------------------");
}
/**
* java对象与json对象互相转换
*/
private static void TestJsonBean() {
/**
* 创建java对象
*/
Student student = new Student();
student.setId(1);
student.setName("jag");
student.setSex("man");
student.setAge(25);
student.setHobby(new String[] { "篮球", "上网", "跑步", "游戏" });
/**
* java对象转换成json对象,并获取json对象属性
*/
JSONObject jsonStu = JSONObject.fromObject(student);
System.out.println(jsonStu.toString());
System.out.println(jsonStu.getJSONArray("hobby"));
System.out.println("-----------------------");
/**
* json对象转换成java对象,并获取java对象属性
*/
Student stu = (Student) JSONObject.toBean(jsonStu, Student.class);
System.out.println(stu.getName());
System.out.println("-----------------------");
/**
* 创建json对象
*/
JSONObject jsonObj = new JSONObject();
jsonObj.put("id", 1);
jsonObj.put("name", "张勇");
jsonObj.put("sex", "男");
jsonObj.put("age", 24);
// jsonObj.put("hobby",new String[]{"上网","游戏","跑步","音乐"});
// System.out.println(jsonObj.toString());
/**
* json对象转换成java对象
*/
Student stud = (Student) JSONObject.toBean(jsonObj, Student.class);
System.out.println(stud.getName());
System.out.println("-----------------------");
}
}