?? validateservlet.java
字號:
package com.briup.web;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import java.util.Vector;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ValidateServlet extends HttpServlet {
private List<String> users
=new Vector<String>();
public void init(){
users.add("briup");
users.add("peter");
users.add("jason");
users.add("kevin");
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String username
=request.getParameter("username");
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");
PrintWriter pw=response.getWriter();
if(users.contains(username)){
pw.println(
"<font size=\"3\" color=\"red\">");
pw.println("用戶名已經(jīng)被占用!");
pw.println("</font>");
}else{
pw.println(
"<font size=\"3\" color=\"blue\">");
pw.println("可以使用此用戶名!");
pw.println("</font>");
}
pw.flush();
pw.close();
}
}
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