package com.wzw.submitdata.utils;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class NetUtil {


	/**
	 * 使用GET訪問去訪問網路
	 * @param username
	 * @param password
	 * @return 伺服器返回的結果
	 */
	public static String loginOfGet(String username,String password){
		HttpURLConnection conn=null;
		try {
			String data="username="+username+"&password="+password;
			URL url=new URL("http://192.168.1.4:8080/AndroidServer/LoginServlet?"+data);
			conn=(HttpURLConnection) url.openConnection();
			conn.setRequestMethod("GET");
			conn.setConnectTimeout(10000);
			conn.setReadTimeout(5000);
			conn.connect();
			int code=conn.getResponseCode();
			if(code==200){
				InputStream is=conn.getInputStream();
				String state=getStringFromInputStream(is);
				return state;
			}
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			if(conn!=null){
				conn.disconnect();
			}
		}
		
		
		return null;
	}
	

	/**
	 * 使用POST訪問去訪問網路
	 * @param username
	 * @param password
	 * @return
	 */
	public static String LoginOfPost(String username,String password){
		HttpURLConnection conn=null;
		try {
			URL url=new URL("http://192.168.1.4:8080/AndroidServer/LoginServlet");
			conn=(HttpURLConnection) url.openConnection();
			conn.setRequestMethod("POST");
			conn.setConnectTimeout(10000);
			conn.setReadTimeout(5000);
			conn.setDoOutput(true);
			//post請求的引數
			String data="username="+username+"&password="+password;
			OutputStream out=conn.getOutputStream();
			out.write(data.getBytes());
			out.flush();
			out.close();
			
			
			conn.connect();
			int code=conn.getResponseCode();
			if(code==200){
				InputStream is=conn.getInputStream();
				String state=getStringFromInputStream(is);
				return state;
			}
			
			
			
		} catch (Exception e) {
			e.printStackTrace();
		}finally{
			if(conn!=null){
				conn.disconnect();
			}
		}
		
		
		
		return null;
	}
	
	
	
	/**
	 * 根據輸入流返回一個字串
	 * @param is
	 * @return
	 * @throws Exception 
	 */
	private static String getStringFromInputStream(InputStream is) throws Exception{
	
		ByteArrayOutputStream baos=new ByteArrayOutputStream();
		byte[] buff=new byte[1024];
		int len=-1;
		while((len=is.read(buff))!=-1){
			baos.write(buff, 0, len);
		}
		is.close();
		String html=baos.toString();
		baos.close();
		
		
		return html;
	}
}