CODE EXAMPLE FOR JAVASCRIPT

http response in json format usin gjava

package service;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.HashMap;
import java.util.Map;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedInputStream;
import cn.edu.thu.cv.util.Base64Image;

public class Client {
	public static final String IP_ADDR = "***. ***. ***. ***";//The server address should be changed to the server's IP here
	public static final int PORT = 12345;//Server port number  
	
	
	public static int register (String name, String imgPath, int opNum) {
		String imgStr = Base64Image.GetImageStr (imgPath);//It converts the image information into base64 encoding
		int isRegSuccess = 0;
		 while (true) {  
	        	Socket socket = null;
	        	try {
	        		//Create a stream socket and connect it to the specified port number on the specified host
		        	socket = new Socket (IP_ADDR, PORT);  
		        	System.out.println ("Connection has been established");        
		        	//Send data to the server  
		        	Map <String, String> map = new HashMap <String, String> ();
		        	map.put ("name", name);
		        	map.put ("img", imgStr);
		        	map.put ("op", opNum + "");
		        	//Convert json to String type  
		        	JSONObject json = new JSONObject (map);
		        	String jsonString = "";
		                jsonString = json.toString ();
		        	//Convert String to byte []
		        	//byte [] jsonByte = new byte [jsonString.length () + 1];
		        	byte [] jsonByte = jsonString.getBytes ();
		        	DataOutputStream outputStream = null;
		        	outputStream = new DataOutputStream (socket.getOutputStream ());
 	        	        System.out.println ("The length of the data sent is:" + jsonByte.length);
		        	outputStream.write (jsonByte);
		        	outputStream.flush ();
		                System.out.println ("Data transfer completed");
		                socket.shutdownOutput ();
		            
		           //Read server-side data  
		            DataInputStream inputStream = null;
		            String strInputstream = "";
		            inputStream = new DataInputStream (new BufferedInputStream (socket.getInputStream ())); 
		            strInputstream = inputStream.readUTF ();
	                System.out.println ("The input information is:" + strInputstream);
	                JSONObject js = new JSONObject (strInputstream);
		            System.out.println (js.get ("isSuccess"));
		            isRegSuccess = Integer.parseInt ((String) js.get ("isSuccess")); 
		           //Disconnect if you receive "OK"  
		            if (js! = null) {  
		                System.out.println ("The client will close the connection");  
		                Thread.sleep (500);  
		                break;  
		            }  
		            
	        	} catch (Exception e) {
	        		System.out.println ("Client exception:" + e.getMessage ()); 
	        		break;
	        	} finally {
	        		if (socket! = null) {
	        			try {
							socket.close ();
						} catch (IOException e) {
							socket = null; 
							System.out.println ("Client finally exception:" + e.getMessage ()); 
						}
	        		}
	        	}
	        }
		 return isRegSuccess;	
	}
	
    public static void main (String [] args) {  
    	  register ("gongyunfei", "D:/test1.jpg", 1);//The third parameter is the type of operation server can know what you are doing
   }  
}