java解析String字符串(json格式)

需要jar包：json-lib-2.4-jdk15.jar

一、

　　String str = "{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"}";

　　此时用JSONObject：

1 String str = "{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"}";
2 JSONObject json = JSONObject.fromObject(str);
3 System.out.println(json.getString("name"));

 

 

二、

　  String jsonString = "[{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"}"

　　　　　　　　　　　　+ ",{\"name\":\"lisi\",\"password\":\"lisi123\",\"email\":\"1435123@qq.com\"}]";

　　此时用JSONArray:

String jsonString = "[{\"name\":\"zhangsan\",\"password\":\"zhangsan123\",\"email\":\"10371443@qq.com\"}"
    + ",{\"name\":\"lisi\",\"password\":\"lisi123\",\"email\":\"1435123@qq.com\"}]";
JSONArray jsonArray = JSONArray.fromObject(jsonString);
for(int i = 0 ;i < jsonArray.size() ; i++){
    System.out.println("name = "+jsonArray.getJSONObject(i).getString("name"));
    System.out.println("password = "+jsonArray.getJSONObject(i).getString("password"));
    System.out.println("email = "+jsonArray.getJSONObject(i).getString("email"));
}

 

 

如果jar包是 com.alibaba.fastjson.JSONArray;

第二个的方法可能是
JSONArray jsonArray = JSONArray.parseArray(jsonString );