Java get JSON data in URL __ frame

Import a related jar package

(1) First of all thank http://m.blog.csdn.net/blog/u013532827/19755907 to share, I directly use the Net.sf.json.* class packet
(2) packet download address: Http://download.csdn.net/detail/hedgehog8/4237121#comment inside the packet is still relatively full, and do not need to download points ~
(3) in the spirit of less than the introduction of the principle of jar bag, began only imported Json-lib-2.4-jdk15.jar, error: java.lang.ClassNotFoundException: org.apache.commons.lang.exception.NestableRuntimeExcept;
(4) Online check, said is also need to import
Commons-beanutils-1.7.0.jar
Commons-lang-2.1.jar
Ezmorph-1.0.2.jar
Continue importing after all import is still an error
Commons-collections-3.2.1.jar
Commons-logging-1.1.1.jar
And then it's okay.

2. Get the JSON data in the URL

public static string Loadjson (string url) {  
        StringBuilder json = new StringBuilder ();                  
        try {  
            url urlobject = new URL (URL);  
            URLConnection UC = Urlobject.openconnection ();  
            BufferedReader in = new BufferedReader (New InputStreamReader (Uc.getinputstream (), "Utf-8"));  
            String inputline = null;  
            while ((Inputline = In.readline ())!= null) {  
                json.append (inputline);  
            }  
            In.close ();  
        } catch (Malformedurlexception e) {  
            e.printstacktrace ();  
        } catch (IOException e) {  
            e.printstacktrace (); c14/>} return  
        json.tostring ();  
    

3. Get value based on key

After step 2, you can get the string of JSON, and the following will get value based on the key value

 String URL = "";  Write your own URL link, I will not publish the HA ~ String json = Loadjson (URL);   Gets the JSON string System.out.println (JSON);
        Detects if Jsonobject Jsonobject=jsonobject.fromobject (JSON) is correctly obtained;  System.out.println (Jsonobject.get ("id")); Where the ID is a key in JSON and detects whether the value can be obtained