login.java

Java+Web+会话+聊天室希望对兄弟们有点儿帮助

package pchat;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import pchat.*;
import java.sql.*;

public class Login extends HttpServlet {
    public Login() {
        try {
            jbInit();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

    LoginData ld = new LoginData();
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    //Initialize global variables
    public void init() throws ServletException {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        response.setContentType(CONTENT_TYPE);
        PrintWriter out = response.getWriter();
        request.setCharacterEncoding("GB2312");
        String name = null;
        name = request.getParameter("txtName");
        String pass = null;
        pass = request.getParameter("txtPassword");
        String rpass = null;
        rpass = request.getParameter("txtRPassword");
        if (!name.equals("")) {
            if (!ld.Ishave(name) == true) { //判断用户名是否存在
                if (!pass.equals("") || rpass.equals("")) {
                    if (pass.equals(rpass)) {
                       if( ld.noteData(name, pass)==false){
                           // System.out.println("来了"+name+pass);
                           response.sendRedirect("Sm.html");
                       }
                       else
                           response.sendRedirect("have.html");
                    } else
                        response.sendRedirect("Login.html");
                } else
                    response.sendRedirect("Login.html");
            } else
                response.sendRedirect("error.html");

        } else
            response.sendRedirect("Login.html");

        out.close();
    }

    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }

    //Clean up resources
    public void destroy() {
    }

    private void jbInit() throws Exception {
    }
}