mvc架构的简单登录系统，jsp

文件结构

package data;

import java.io.IOException;
import java.sql.ResultSet;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
String toJSP="";
request.setCharacterEncoding("gbk");
response.setContentType("text/html;charset=gbk");
String username=request.getParameter("username");
String password=request.getParameter("password");
String sql="select * from userChart where userId='"+username+"'" +
"&&userPassword='"+password+"'";
JdbcBean jdbc=new JdbcBean();
try{
ResultSet rs=jdbc.query(sql);
if(rs.next()){
toJSP="success.jsp";
}
else{
toJSP="error.jsp";
}
rs.close();
}
catch(Exception e){
System.out.println("������ѯ�쳣");
}
RequestDispatcher rd=request.getRequestDispatcher(toJSP);
rd.forward(request, response);
}
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
}

View Code
数据库为mysql，用户名：root；密码：admin。数据库名：trade；表名：userchart

参考:http://blog.csdn.net/lindonglian/article/details/40581117?utm_source=tuicool&utm_medium=referral
http://www.xin126.cn/show.asp?id=2504