【Java】解析json文件

wangy

1. /*1、JsonObject
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3. 使用JsonObject解析只有一条数据的json是非常方便的例如："{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"}"
   
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5. */
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7. public static void main(String[] args) {
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8. 
   
9.                  String jsonString ="{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"}";
   
10.                  JSONObject json = JSONObject.fromObject(jsonString);
    
11.                  User user = new User();
    
12.                  user.setName(json.getString("name"));
    
13.                  user.setPassword(json.getString("password"));
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14.                  user.setEmail(json.getString("email"));
    
15.                  System.out.println(user.toString());
    
16.         }
    
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18. 2、JsonArray
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20. 使用JsonArray解析数组数据的json是非常方便的例如："[{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"},{"name":"lisi","password":"lisi123","email":"1435123@qq.com"}]"
    
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23. String json = <span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">"[{"name":"zhangsan","password":"zhangsan123","email":"10371443@qq.com"},</span><span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">{"name":"lisi","password":"lisi123","email":"1435123@qq.com"}</span><span style="color: rgb(51, 51, 51); font-family: Arial; font-size: 14px; line-height: 26px;">]"</span>;
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24.                  JSONArray jsonArray = JSONArray.fromObject(json);
    
25.                  ArrayList<User> users = new ArrayList<User>();
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26.                  for (int i = 0; i < jsonArray.size(); i++) {
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27.                          User userM = new User();
    
28.                          user.setName(jsonArray.getJSONObject(i).getString("name"));
    
29.                          user.setpassword(jsonArray.getJSONObject(i).getString("password"));
    
30.                          user.setEmail(jsonArray.getJSONObject(i).getString("email"));
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31.                          users.add(user);
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32.                 }
    
33.                  for (User user : users) {
    
34.                         System.out.println(user.toString());
    
35.                 }
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36. 
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37. 通过以上两种方式可以解析不同格式的json数据
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