//1.对象
package com.hx.test;
import com.hx.entity.Person;
import net.sf.json.JSONObject;
public class JsonTest {
public static void main(String[] args) {
Person person = new Person();
person.setName("tom");
person.setAddress("UK");
person.setAge(14);
JSONObject json = JSONObject.fromObject(person);
System.out.println(json.toString());
}
}
//输出结果为:
//{"address":"UK","age":14,"name":"tom"}
//2.数组和集合
package com.hx.test;
import java.util.ArrayList;
import java.util.List;
import net.sf.json.JSONArray;
public class JsonTest {
public static void main(String[] args) {
List<String> fruit = new ArrayList<String>();
fruit.add("apple");
fruit.add("pear");
fruit.add("orange");
fruit.add("banana");
JSONArray fruits = JSONArray.fromObject(fruit);
System.out.println(fruits.toString());
}
}
//输出结果:
//["apple","pear","orange","banana"]
//2)Map集合
//Map集合比较特殊,因为 key-value键值对的对应方式,所以咱们应当用JSONObject来生成json。
package com.hx.test;
import java.util.HashMap;
import java.util.Map;
import net.sf.json.JSONObject;
public class JsonTest {
public static void main(String[] args) {
Map<String, String> map = new HashMap<String, String>();
map.put("001", "apple");
map.put("002", "pear");
map.put("003", "orange");
map.put("004", "banana");
JSONObject json = JSONObject.fromObject(map);
System.out.println(json.toString());
}
}
//输出结果:
//{"004":"banana","001":"apple","002":"pear","003":"orange"}
//3) Map集合扩展
package com.hx.test;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONObject;
public class JsonTest {
public static void main(String[] args) {
Map<String, List<String>> map = new HashMap<String, List<String>>();
List<String> strList1 = new ArrayList<String>();
strList1.add("aa");
strList1.add("bb");
strList1.add("cc");
List<String> strList2 = new ArrayList<String>();
strList2.add("dd");
strList2.add("ee");
strList2.add("ff");
List<String> strList3 = new ArrayList<String>();
strList3.add("gg");
strList3.add("hh");
strList3.add("ii");
map.put("001", strList1);
map.put("002", strList2);
map.put("003", strList3);
JSONObject json = JSONObject.fromObject(map);
System.out.println(json.toString());
}
}
//输出结果:
//{"001":["aa","bb","cc"],"002":["dd","ee","ff"],"003":["gg","hh","ii"]}
/*
和json-lib相比,Gson操作就相当的更简单了
不管是对象还是数组,还是上面较复杂的map集合,
操作都是一样的,Gson是出自google,应为比较小巧,所以其自己系统android上面用的也 是这个。
*/
//因为操作都一样,所以在这里只给大家演示一种情况。
//别忘了导jar包:[i]gson-2.1.jar[/i]
package com.hx.test;
import com.google.gson.Gson;
import com.hx.entity.Person;
public class GsonTest {
public static void main(String[] args) {
Person person = new Person();
person.setAddress("UK");
person.setAge(14);
person.setName("tom");
Gson gson = new Gson();
System.out.println(gson.toJson(person));
}
}
//输出结果:
//{"name":"tom","age":14,"address":"UK"}