Json例子

package com.jason;

 

import java.io.StringReader;
import java.util.ArrayList;
import java.util.List;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import com.google.gson.stream.JsonReader;

public class JsonTest {

 public static void parseObject() throws Exception
 {
  String data = "{\"name\":\"jason\",\"age\":23,\"sex\":\"男\"}";
  Gson gson = new Gson();
  StringReader reader = new StringReader(data);
  JsonReader jsonReader = new JsonReader(reader);
  jsonReader.beginObject();
  while(jsonReader.hasNext())
  {
   String attribute = jsonReader.nextName();
   String value = jsonReader.nextString();
   System.out.println(attribute+" : "+value);
  }
  jsonReader.endObject();
  reader.close();
  jsonReader.close();
 }
 public static void parseArray() throws Exception
 {
  String data = "[{\"name\":\"jason\",\"age\":23,\"sex\":\"男\"}," +
    "{\"name\":\"uqgming\",\"age\":23,\"sex\":\"男\"} ]";
  Gson gson = new Gson();
  StringReader reader = new StringReader(data);
  JsonReader jsonReader = new JsonReader(reader);
      jsonReader.beginArray();
  while(jsonReader.hasNext())
  {
   jsonReader.beginObject();
   System.out.println("学生--------");
   while(jsonReader.hasNext())
   {
    String attribute = jsonReader.nextName();
    String value = jsonReader.nextString();
    System.out.println(attribute+" : "+value);
   }
   jsonReader.endObject();
  }
  jsonReader.endArray();
  reader.close();
  jsonReader.close();
 }
 
 public static String getStringToListObject(){
  
  String jsonStr = "";
  Student stuQugming = new Student("屈光明",31,'男');
  Student stup = new Student("jason",22,'男');
  
  List<Student> list = new ArrayList<Student>();
  list.add(stuQugming);
  list.add(stup);
  
  Gson gson = new Gson();
      jsonStr = gson.toJson(list,new TypeToken<List<Student>>() {
   }.getType()); 
  
  return jsonStr;
  
 }
 
 public static List<Student> getListObjectFromJson(String jsonStr)
 {
     List<Student> list = null;
     Gson gson = new Gson();
     list = gson.fromJson(jsonStr,new TypeToken<List<Student>>() {
   }.getType());
    
     return list;
 }
 
 public static void main(String[] args) {
  try {
   String json = getStringToListObject();
   List<Student> list = getListObjectFromJson(json);
   for(Student stu:list)
   {
    System.out.println(stu);
   }
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 
 }
}