Android中使用Gson解析JSON数据的两种方法

 1 String jsonData = "[{\"username\":\"arthinking\",\"userId\":001},{\"username\":\"Jason\",\"userId\":002}]"; 
 2 try{ 
 3 JsonReader reader = new JsonReader(new StringReader(jsonData)); 
 4 reader.beginArray(); 
 5 while(reader.hasNext()){ 
 6 reader.beginObject(); 
 7 while(reader.hasNext()){ 
 8 String tagName = reader.nextName(); 
 9 if(tagName.equals("username")){ 
10 System.out.println(reader.nextString()); 
11 } 
12 else if(tagName.equals("userId")){ 
13 System.out.println(reader.nextString()); 
14 } 
15 } 
16 reader.endObject(); 
17 } 
18 reader.endArray(); 
19 } 
20 catch(Exception e){ 
21 e.printStackTrace(); 
22 } 

 1 public class User { 
 2 private String username ; 
 3 private int userId ; 
 4 public String getUsername() { 
 5 return username; 
 6 } 
 7 public void setUsername(String username) { 
 8 this.username = username; 
 9 } 
10 public int getUserId() { 
11 return userId; 
12 } 
13 public void setUserId(int userId) { 
14 this.userId = userId; 
15 } 
16 } 

1 String jsonData = "{\"username\":\"arthinking\",\"userId\":001}"; 
2 Gson gson = new Gson(); 
3 User user = gson.fromJson(jsonData, User.class); 
4 System.out.println(user.getUsername()); 
5 System.out.println(user.getUserId());