DIV CSS 佈局教程網

 DIV+CSS佈局教程網 >> 網頁腳本 >> JavaScript入門知識 >> JSON基礎 >> JSON取值前判斷
JSON取值前判斷
編輯:JSON基礎     

復制代碼 代碼如下:
public static void main(String[] args)throws Exception{
     String jsonStr1="{\"access_token\":\"OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyMKOSjz5SHPHGUmt6f09_762MWQ0HLnZtffDPyD2A6TgCqWlZAEsHLhIaaQVYx1lywxOWQTrr7rX13i_w1INGnw\",\"expires_in\":7200,\"openid\":\"owYTUs68SXYX83wBvm_uN4Ya****\",\"scope\":\"snsapi_base\"}";   
    String jsonStr2="{\"access_token\":\"OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyMKOSjz5SHPHGUmt6f09_762MWQ0HLnZtffDPyD2A6TgCqWlZAEsHLhIaaQVYx1lywxOWQTrr7rX13i_w1INGnw\",\"expires_in\":7200,\"refresh_token\":\"OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyuq9ojibRxolf9ElS7PSM0Kz1OTNlJ8ZKJl2BfbPi0LA-nQ9uNVUE8ujLFsdCeP79_L9FmIYcmHLXWXnl-fUsVg\",\"openid\":\"owYTUs68SXYX83wBvm_uN4Y****\",\"scope\":\"snsapi_base\"}";   
    JSONObject json1=JSONObject.fromObject(jsonStr1);
    JSONObject json2=JSONObject.fromObject(jsonStr2);
    String refresh_token_1=null;
    String refresh_token_2=null;
    if(json1.containsKey("refresh_token")){
        refresh_token_1=json1.getString("refresh_token");
    }
    if(json2.containsKey("refresh_token")){
        refresh_token_2=json2.getString("refresh_token");
    }
   
    System.out.println(refresh_token_1);
    System.out.println(refresh_token_2);
}

運行結果:

復制代碼 代碼如下:
null
OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyuq9ojibRxolf9ElS7PSM0Kz1OTNlJ8ZKJl2BfbPi0LA-nQ9uNVUE8ujLFsdCeP79_L9FmIYcmHLXWXnl-fUsVg

XML學習教程| jQuery入門知識| AJAX入門| Dreamweaver教程| Fireworks入門知識| SEO技巧| SEO優化集錦|
Copyright © DIV+CSS佈局教程網 All Rights Reserved