服務器驗證提交的表單程序 java – JAVA編程語言程序開發技術文章

//服務器驗證提交的表單程序點擊下載源碼http://up.aiwalls.com/2012/0317/20120317112753397.rar

package cn.itcast.day_24;

import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.URLDecoder;

public class Server {

public static void main(String[] args) throws Exception {
System.out.println("服務已開啟,監聽9999端口");
//創建服務器
ServerSocket serversocket = new ServerSocket(9999);
while(true){
 //等待客服端的請求
 final Socket socket = serversocket.accept();
 new Thread(){
 @Override
 public void run(){
 try {
 //創建輸入流輸出流
 InputStream in = socket.getInputStream();
 PrintStream ps = new PrintStream(socket.getOutputStream());
 //OutputStream out = socket.getOutputStream();

 //讀取從客服端發來的消息
 byte[] buffer = new byte[1024 * 1024];
 int len = in.read(buffer);
 String request = new String(buffer, 0, len);
 System.out.println(request);

 //從客服端發出的數據中查看到,關鍵的內容數據都是放在最後,並且換瞭兩次行,從而有瞭截取內容的方法
 int index = request.indexOf("\r\n\r\n"); //拿到換兩次行的索引
 String content = request.substring(index + 4); //把索引加4就得到瞭內容數據

 //使用getParameter方法獲取鍵的值
 String username = getParameter(content,"username");
 String password = getParameter(content,"password");
 String gender = getParameter(content,"gender");
 String interest = getParameter(content,"interest");
 String city = getParameter(content,"city");
 String photo = getParameter(content,"photo");

 System.out.println("username=" + username); //打印出讀取到的內容
 System.out.println("password=" + password);
 System.out.println("gender=" + gender);
 System.out.println("interest=" + interest);
 System.out.println("city=" + city);
 System.out.println("photo=" + photo);

 String mes = "註冊成功"; //開始時默認設置註冊成功

 if("".equals(username) || username == null) //判斷用戶名密碼等是否為空
 mes = "用戶名必須填寫";
 else if("".equals(password) || password == null)
 mes = "密碼必須填寫";
 else if("".equals(gender) || gender == null)
 mes = "性別必須選擇";
 else if("".equals(interest) || interest == null)
 mes = "興趣必須選擇";
 else if("".equals(city) || city == null)
 mes = "城市必須選擇";
 else if("".equals(photo) || photo == null)
 mes = "頭像必須上傳";

 //以寫代碼的方式,判斷是否成功
 //out.write(("").getBytes());

 /*ps.println("<html>");
 ps.println("<head>");
 ps.println("<title>" + "註冊結果"+ "</title>");
 ps.println("</head>");

 ps.println("<body>");
 ps.println(("") + mes + "");

 ps.println("</body>");
 ps.println("</html>");*/

 //新建兩個文件,判斷是否註冊成功,讀取文件的內容,暫時存儲到ByteArrayOutputStream中
 FileInputStream fis = new FileInputStream("註冊成功".equals(mes) ? "page/success.html" : "page/fale.html");
 ByteArrayOutputStream baos = new ByteArrayOutputStream();
 while((len = fis.read(buffer)) != -1)
 baos.write(buffer, 0, len);

 fis.close();
 baos.close();

 //ByteArrayOutputStream的toByteArray方法創建瞭一個新的數組,把新的數組傳到string中,創建瞭一個新的字符串
 String response = new String(baos.toByteArray());
 //使用新的字符串替換掉文件中的"變量"
 response = response.replace("變量", mes);
 //System.out.println(response);
 //打印出服務器返回的註冊成功或失敗的數據
 ps.println(response + " ");

 //打印出用戶註冊的信息
 ps.println("username=" + username + " ");
 ps.println("password=" + password + " ");
 ps.println("gender=" + gender + " ");
 ps.println("interest=" + interest + " ");
 ps.println("city=" + city + " ");
 ps.println("photo=" + photo + " ");

 //關閉本線程的流
 socket.close();
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }


 }
 }.start();
}

}

//獲取鍵值的方法,並且對值進行解碼
public static String getParameter(String content, String key) throws UnsupportedEncodingException{
String[] entryArr = content.split("&");
for (String contents : entryArr) {
   String[] arr = contents.split("=");
   if(arr[0].equals(key))
    return arr.length == 2 ? URLDecoder.decode(arr[1], "GBK") : "";
}
return null;
}
}

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