五.URLConnection与url对象交互

package myk;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.PrintStream;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;

public class RequestURLConnection {

	/**
	 *与url对象交互
	 *java程序与服务器端的CGI进行交互
	 */
	public static void main(String[] args) {
		
		try {
			String string_vesion = URLEncoder.encode("sdghghjk");
			URL exampleURL = new URL("http://java.sun.com/cgi-bin/backwards");
			//建立连接
			URLConnection exampleConnection = exampleURL.openConnection();
			
			exampleConnection.setDoInput(true);
			exampleConnection.setDoOutput(true);
			
			//获取URLConnection的数据输出流
			PrintStream printStream = new PrintStream(new DataOutputStream(exampleConnection.getOutputStream()));
			//从输出流输出数据
			printStream.println(string_vesion);
			
			printStream.close();
			
			DataInputStream dis = new DataInputStream(exampleConnection.getInputStream());
			
			String inputLine;
			
			while((inputLine=dis.readLine())!=null){
				System.out.println(inputLine);
			}
			
			dis.close();
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

}