JSON取值前判断-牛翰网

复制代码代码如下:

 
 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);

 }

运行结果:

复制代码代码如下:

 
 null

 OezXcEiiBSKSxW0eoylIeIVb08lFhyeFsq6cUJJNo8XYLoJjqYARJOZUrnqhfvnyuq9ojibRxolf9ElS7PSM0Kz1OTNlJ8ZKJl2BfbPi0LA-nQ9uNVUE8ujLFsdCeP79_L9FmIYcmHLXWXnl-fUsVg

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