📄 login_jsp.java

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💻 JAVA
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package org.apache.jsp;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import java.sql.*;

public final class login_jsp extends org.apache.jasper.runtime.HttpJspBase
    implements org.apache.jasper.runtime.JspSourceDependent {

  private static java.util.Vector _jspx_dependants;

  public java.util.List getDependants() {
    return _jspx_dependants;
  }

  public void _jspService(HttpServletRequest request, HttpServletResponse response)
        throws java.io.IOException, ServletException {

    JspFactory _jspxFactory = null;
    PageContext pageContext = null;
    HttpSession session = null;
    ServletContext application = null;
    ServletConfig config = null;
    JspWriter out = null;
    Object page = this;
    JspWriter _jspx_out = null;
    PageContext _jspx_page_context = null;


    try {
      _jspxFactory = JspFactory.getDefaultFactory();
      response.setContentType("text/html; charset=GBK");
      pageContext = _jspxFactory.getPageContext(this, request, response,
      			null, true, 8192, true);
      _jspx_page_context = pageContext;
      application = pageContext.getServletContext();
      config = pageContext.getServletConfig();
      session = pageContext.getSession();
      out = pageContext.getOut();
      _jspx_out = out;

      out.write("\r\n");
      out.write("\r\n");
      out.write("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">\r\n");
      out.write("<html>\r\n");
      out.write("<head>\r\n");
      out.write("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">\r\n");
      out.write("<title>验证页面</title>\r\n");
      out.write("</head>\r\n");
      out.write("<body>\r\n");

String username = request.getParameter("uid");
String password = request.getParameter("upwd");
if(username != null && !username.equals("")){
try{
	/*
	 * 连接数据库
	 */
	Class.forName("org.gjt.mm.mysql.Driver");
	Connection conn=DriverManager.getConnection("jdbc:mysql://localhost/test","root","zgy01");		    
	Statement stmt=conn.createStatement();
	String sql = "select * from users where username='" + username + "'";
    sql += " and password='" + password + "'";  //准备查询语句
    ResultSet rs=stmt.executeQuery( sql );
    if( rs.next() ){ 
    	session.setAttribute("login","ok"); //验证通过之后，跳转到后续页面
    	session.setAttribute("uname",username);

      out.write("\r\n");
      out.write("\t\t");
      if (true) {
        _jspx_page_context.forward("main.jsp");
        return;
      }
      out.write(' ');
      out.write('\r');
      out.write('\n');

    }else
 		out.println("错误的用户名和密码");  //验证未通过，显示错误信息
    	out.println("<a href=index.html>返回</a>"); 
	}catch(Exception ee){
	    ee.printStackTrace();
	} 
}else{
	out.println("请先登录！");  //验证未通过，显示错误信息
	out.println("<a href=index.html>返回</a>"); 
}

      out.write("\r\n");
      out.write("</body>\r\n");
      out.write("</html>\r\n");
    } catch (Throwable t) {
      if (!(t instanceof SkipPageException)){
        out = _jspx_out;
        if (out != null && out.getBufferSize() != 0)
          out.clearBuffer();
        if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);
      }
    } finally {
      if (_jspxFactory != null) _jspxFactory.releasePageContext(_jspx_page_context);
    }
  }
}
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