webDemo.zip

package com.ww.web_demo.servlet; import com.ww.web_demo.javabean.Student; import com.ww.web_demo.service.IStudentService; import com.ww.web_demo.service.impl.StudentServiceImpl; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.List; @WebServlet("/login") public class LoginServlet extends HttpServlet { private IStudentService iStudentService=new StudentServiceImpl(); @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { //第一步：接收输入的用户名和密码 String username=req.getParameter("username");//接收form表单里面带入的参数 String password=req.getParameter("password"); //第二步：判断用户名和密码是否存在，存在，登录成功，不存在，登录失败 if("admin".equals(username)&&"admin".equals(password)){ List list=iStudentService.findAll(); req.setAttribute("list",list); req.getRequestDispatcher("main.jsp").forward(req,resp); // resp.sendRedirect("main.jsp"); }else{ resp.sendRedirect("index.jsp"); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this.doGet(req,resp); } } //public class LoginServlet implements Servlet { // @Override // public void init(ServletConfig servletConfig) throws ServletException { // // } // // @Override // public ServletConfig getServletConfig() { // return null; // } // // @Override // public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException { // //第一步：接收输入的用户名和密码 // String username=servletRequest.getParameter("username");//接收form表单里面带入的参数 // String password=servletRequest.getParameter("password"); // //第二步：判断用户名和密码是否存在，存在，登录成功，不存在，登录失败 // if("admin".equals(username)&&"admin".equals(password)){ // PrintWriter pw=servletResponse.getWriter(); // pw.write("学生信息管理系统"); // }else{ // PrintWriter pw=servletResponse.getWriter(); // pw.write("没有找到该用户"); // } // // } // // @Override // public String getServletInfo() { // return null; // } // // @Override // public void destroy() { // // } //}