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📄 loginservlet.java

📁 一个JSPServerlet编写的
💻 JAVA
字号:
🔍 
package regetemail;

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

public class LoginServlet extends HttpServlet {
    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();
        try {
            String userName = request.getParameter("username").trim();
            String userPwd = request.getParameter("userpassword").trim();

            if(!(userName == null && userName.equals(""))
               && !(userPwd==null && userPwd.equals(""))){
                //查询用户
                System.out.println(userName);
                System.out.println(userPwd);
                DataBaseOptor dbop = new DataBaseOptor();
                if(!dbop.getUser(userName,userPwd)){
                    System.out.println(userName);
                    System.out.println(userPwd);
                    out.println("<h3>登录失败！请核实后再登录。</h3><br />");
                    out.println("<br />");
                    out.println("<a href=\"loginservlet\">返回</a>");
                    out.close();
                }else{
                    System.out.println(userName);
                    System.out.println(userPwd);
                    out.println("<h3>恭喜您登录成功！</h3><br />");
                    out.println("<br />");
                    out.println("<a href=\"loginservlet\">返回</a>");
                    out.close();
                }
            }
        } catch (Exception ex) {
            System.out.println("登录异常："+ex.getMessage());
        }

        out.println("<html>");
        out.println("<head><title>欢迎光临</title></head>");
        out.println("<body bgcolor=\"#008080\">");
        out.println("<h1>欢迎使用本系统！</h1><br />");
        out.println("<form name =\"myform\" action=\"loginservlet\" method =\"post\">");
        out.println("<table align = \"center\" border =\"0\" width =\"80%\">");
        out.println("<tr><td>用户名：</td><td>");
        out.println("<input type=\"text\" name =\"username\"></td></tr>");
        out.println("<tr><td>密 码：</td><td>");
        out.println("<input type=\"password\" name =\"userpassword\"></td></tr>");
        out.println("<tr><td><input type=\"submit\"  value=\"登录\"></td><td>");
        out.println("&nbsp;</td></tr>");
        out.println("</form></table>");
        out.println("<br /><br />");
        out.println("<a href=\"toemailservlet\">找回密码</a>");
        out.println("</body>");
        out.println("</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() {
    }
}

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