@WebServlet("/coursesUrl") public class CoursesController extends HttpServlet { private static final long serialVersionUID = 1L; public CoursesController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { CoursesService coursesSerice = new CoursesService(); User user = (User) request.getSession().getAttribute("loginUser"); List<Courses> courses = coursesSerice.getCourseList(); request.setAttribute("courses", courses); request.getRequestDispatcher("/WEB-INF/pages/courses.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); }

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private static final long serialVersionUID = 1L; @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 设置响应类型和...

使用Servlet处理一个上传的文件

private static final long serialVersionUID = 1L; protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // 读取请求Body byte[] ...

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这是一个 Java 类，用于实现添加图书的 Servlet。Servlet 是 Java Web 应用程序中处理 HTTP 请求的组件，可以响应来自客户端的 GET、POST 等请求，并返回相应的响应结果。serialVersionUID 是一个序列化版本号，用于...

@WebServlet("/introduceUrl") public class IntroduceController extends HttpServlet { private static final long serialVersionUID = 1L; public IntroduceController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub request.getRequestDispatcher("/WEB-INF/pages/introduce.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个使用 Servlet 技术实现的介绍控制器，它提供了 doGet() 和 doPost() 两个方法来处理 GET 和 POST 请求。在 doGet() 方法中，它直接将请求转发到 "/WEB-INF/pages/introduce.jsp" 页面进行展示。在 doPost() ...

@WebServlet("/updateInfo") public class UpdateInfoController extends HttpServlet { private static final long serialVersionUID = 1L; public UpdateInfoController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String description = request.getParameter("description"); User user = (User) request.getSession().getAttribute("loginUser"); request.getRequestDispatcher("/infoUrl").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个Java Servlet，其中定义了一个名为UpdateInfoController的类。该类继承了HttpServlet类，实现了doGet和doPost方法。在doGet方法中，它首先从请求中获取名为description的参数，并从会话中获取名为loginUser...

@WebServlet("/admin/managecoursesUrl") public class ManageCourseController extends HttpServlet { private static final long serialVersionUID = 1L; public ManageCourseController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { CoursesService coursesSerice = new CoursesService(); List<Courses> courses = coursesSerice.getCourseList(); request.setAttribute("courses", courses); request.getRequestDispatcher("/WEB-INF/pages/manage-course.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个基于Servlet的Java Web应用程序中的ManageCourseController类。它处理/admin/managecoursesUrl的GET请求，通过CoursesService获取课程列表并将其作为属性添加到请求中，然后将请求转发到manage-course.jsp...

@WebServlet("/admin/tecoursesUrl") public class TeCourseController extends HttpServlet { private static final long serialVersionUID = 1L; public TeCourseController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { CoursesService coursesSerice = new CoursesService(); List<Courses> courses = coursesSerice.getCourseList(); request.setAttribute("courses", courses); request.getRequestDispatcher("/WEB-INF/pages/te-course.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个 Java Servlet，它处理了一个 URL 为 "/admin/tecoursesUrl" 的 GET 请求和 POST 请求。在 doGet 方法中，它使用 CoursesService 类获取了一个课程列表 courses，并将其设置为 request 属性 "courses"，然后...

@WebServlet("/admin/adminUserUrl") public class AdminUserController extends HttpServlet { private static final long serialVersionUID = 1L; public AdminUserController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { UserService userService = new UserService(); List<User>users = userService.getUserList(); request.setAttribute("users", users); request.getRequestDispatcher("/WEB-INF/pages/admin/admin-user.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个基于Servlet的Java Web应用程序中的AdminUserController类。它处理/admin/adminUserUrl的GET请求，通过UserService获取用户列表并将其作为属性添加到请求中，然后将请求转发到admin-user.jsp页面。POST请求...

@WebServlet("/buycoursesUrl") public class BuyCoursesController extends HttpServlet { private static final long serialVersionUID = 1L; public BuyCoursesController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { CoursesService coursesSerice = new CoursesService(); User user = (User) request.getSession().getAttribute("loginUser"); List<StudentBuy> StudentBuy = coursesSerice.getBuyCourseList(user.getUsername()); request.setAttribute("buys", StudentBuy); request.getRequestDispatcher("/WEB-INF/pages/buycourses.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个基于 Java Servlet 技术实现的课程信息管理系统中的购买课程的控制器类。它接收一个 HTTP GET 请求，从当前用户的会话中获取登录的用户对象，并调用 CoursesService 类的 getBuyCourseList 方法获取该用户已...

import java.io.IOException; import ja.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/login") public class LoginServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public LoginServlet() { super(); } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String username = request.getParameter("username"); String password = request.getParameter("password"); if ("admin".equals(username) && "admin".equals(password)) { response.sendRedirect("success.jsp"); } else { response.sendRedirect("fail.jsp"); } } }

代码中实现了一个名LoginServlet的Servlet类，使用@WebServlet注解将映射到了路径“/login”，当用户在浏览器中访问该路径时，就会由该Servlet类来处理请求。在doPost方法中，首先通过request.getParameter方法...

给我接受一下这段代码package com.sj.newsrelease.servlet; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @WebServlet("/LogoutServlet") public class LogoutServlet extends HttpServlet { private static final long serialVersionUID = 1L; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //1.用户注销 request.getSession().removeAttribute("user"); //2.从客户端删除自动登录的cookie Cookie cookie = new Cookie("autologin", "msg"); cookie.setPath(request.getContextPath()); cookie.setMaxAge(0); response.addCookie(cookie); response.sendRedirect(request.getContextPath()+"/login.jsp"); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }

它使用了 javax.servlet.Servlet 接口的实现，并使用了 @WebServlet 注解来指定访问该 Servlet 的 URL 路径。在 doGet() 方法中，它执行以下操作： 1. 删除当前会话中名为 "user" 的属性，即删除当前用户的会话状态...

@WebServlet("/admin/addScore") public class AddScoreController extends HttpServlet { private static final long serialVersionUID = 1L; public AddScoreController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String isbn = request.getParameter("isbn"); String courseName = request.getParameter("courseName"); String className = request.getParameter("className"); String num = request.getParameter("num"); Score score = new Score(); score.setIsbn(isbn); score.setCourseName(courseName); score.setClassName(className); score.setNum(Integer.valueOf(num)); ScoreService scoreService = new ScoreService(); scoreService.addScore(score); request.getRequestDispatcher("/admin/tecoursesUrl").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个Java Servlet，用于处理添加成绩的请求。根据请求中的参数，创建一个Score对象，设置其属性，并将其传递给ScoreService进行添加。然后，将请求重定向到"/admin/tecoursesUrl"页面。其中，doGet()方法处理...

@WebServlet("/scoreUrl") public class ScoreController extends HttpServlet { private static final long serialVersionUID = 1L; public ScoreController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // ScoreService scoreService = new ScoreService(); // StudentService studentService = new StudentService(); // User user = (User) request.getSession().getAttribute("loginUser"); // List<StudentScoreDto> scores = scoreService.getScoreListByStudentNo(user.getStudentNo()); // // Student student = studentService.getStudentByNo(user.getStudentNo()); // request.setAttribute("student", student); // request.setAttribute("scores", scores); CoursesService coursesSerice = new CoursesService(); User user = (User) request.getSession().getAttribute("loginUser"); List<Courses> courses = coursesSerice.getCourseList(); request.setAttribute("courses", courses); request.getRequestDispatcher("/WEB-INF/pages/score.jsp").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个Java Servlet，其中定义了一个名为ScoreController的类。该类继承了HttpServlet类，实现了doGet和doPost方法。在doGet方法中，它首先实例化了一个CoursesService对象，并通过调用getCoursesList方法获取了...

@WebServlet("/admin/addBuyCourse") public class AddBuyCourseController extends HttpServlet { private static final long serialVersionUID = 1L; public AddBuyCourseController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String isbn = request.getParameter("isbn"); String bookName = request.getParameter("bookName"); User user = (User) request.getSession().getAttribute("loginUser"); Date createTime = new Date(); StudentBuy buy = new StudentBuy(); buy.setIsbn(isbn); buy.setBookName(bookName); String studentNo = user.getUsername(); String username = user.getDisplayName(); buy.setStudentNo(studentNo); buy.setStudentName(username); buy.setCreateTime(createTime); CoursesService courseService = new CoursesService(); ScoreService scoreService = new ScoreService(); Score query = scoreService.getISBN(isbn); if(query != null) { request.setAttribute("msg", "isbn为"+isbn+"的教材已经存在"); request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request, response); return; } // courseService.addStudentBuy(buy); request.getRequestDispatcher("/coursesUrl").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个Java Servlet类，用于处理添加用户购买课程的请求。它接收来自客户端的HTTP请求，并从请求中获取必要的参数，如书的ISBN、书名等。接着，它从HTTP会话中获取当前登录用户的信息，并将这些信息保存到一个...

@WebServlet("/admin/updateCourse") public class UpdateCourseController extends HttpServlet { private static final long serialVersionUID = 1L; public UpdateCourseController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String isbn = request.getParameter("isbn"); String bookName = request.getParameter("bookName"); String tname = request.getParameter("tname"); Date createTime = new Date(); Courses course = new Courses(); course.setIsbn(isbn); course.setBookName(bookName); course.setTname(tname); course.setPressTime(createTime); CoursesService courseService = new CoursesService(); Courses query = courseService.getISBN(isbn); if(query == null) { request.setAttribute("msg", "isbn为"+isbn+"的课程不存在！"); request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request, response); return; } courseService.updateCourse(course); request.getRequestDispatcher("/admin/managecoursesUrl").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个基于 Java Servlet 技术实现的课程信息管理系统中的更新课程信息的控制器类。它接收一个 HTTP GET 请求，从请求参数中获取需要更新的课程的 ISBN 编号、书名、教师姓名等信息，然后创建一个 Courses 对象并...

@WebServlet("/loginUrl") public class LoginController extends HttpServlet { private static final long serialVersionUID = 1L; public LoginController() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String username = request.getParameter("username"); String password = request.getParameter("password"); UserService userService = new UserService(); LoginHistoryService loginHistoryService = new LoginHistoryService(); User res = userService.loginCheck(username, password); if(res != null) { //登录成功 //添加记录 LoginHistory loginHistory = new LoginHistory(); loginHistory.setUserId(res.getUserId()); loginHistory.setIp(request.getRemoteAddr()); loginHistory.setCreateTime(new Date()); loginHistoryService.addLoginHistory(loginHistory); //跳转 request.getSession().setAttribute("loginUser", res); request.getRequestDispatcher("/mainUrl").forward(request, response); }else { //登录失败 request.setAttribute("msg", "登录失败，请检查用户名和密码是否正确！"); request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request, response); } } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } }

这是一个基于Servlet的登录控制器，处理GET请求。它从HTTP请求参数中获取用户名和密码，然后使用UserService对象调用loginCheck方法进行登录验证。如果验证通过，它将记录登录历史并将登录用户添加到会话中，然后将...

package com.test.servlet; import java.io.IOException; 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 javax.servlet.http.HttpSession; import com.test.bean.Cart; import com.test.dao.CartDao; /** * Servlet implementation class DelCartServlet */ @WebServlet("/Servlet/DelCartServlet") public class DelCartServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public DelCartServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("utf-8"); response.setHeader("Content-type","text/html;charset=utf-8") ; String gid=request.getParameter("gid"); if(gid!=null) { HttpSession session=request.getSession(); Cart cart=(Cart)session.getAttribute("cart"); if(cart!=null) { CartDao cartdao=new CartDao(); cartdao.delGoods(cart, Integer.parseInt(gid)); session.setAttribute("cart", cart); response.getWriter().println("删除成功"); }else { response.getWriter().println("删除失败"); } }else { response.getWriter().println("参数不正确"); } response.getWriter().println("查看购物车 "); } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } } 修改删除功能，在购物车物品数量大于1的情况下点击“删除”时减少1个，等于1时删除此项商品；

private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public DelCartServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet...

@WebServlet("/admin/addCourse") public class AddCourseController extends HttpServlet { private static final long serialVersionUID = 1L; public AddCourseController() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String isbn = request.getParameter("isbn"); String bookName = request.getParameter("bookName"); String content = request.getParameter("content"); String author = request.getParameter("author"); String press = request.getParameter("press"); String tname = request.getParameter("tname"); Date createTime = new Date(); Courses course = new Courses(); course.setIsbn(isbn); course.setContent(content); course.setAuthor(author); course.setPress(press); course.setPressTime(createTime); course.setBookName(bookName); course.setTname(tname); CoursesService courseService = new CoursesService(); Courses query = courseService.getISBN(isbn); if(query != null) { request.setAttribute("msg", "isbn为"+isbn+"的教材已经存在"); request.getRequestDispatcher("/WEB-INF/pages/error.jsp").forward(request, response); return; } courseService.addCourse(course); request.getRequestDispatcher("/admin/managecoursesUrl").forward(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doGet(request, response); } }

这是一个Java Servlet类，用于处理添加课程信息的请求。它接收来自客户端的HTTP请求，并从请求中获取必要的参数，如书的ISBN、书名、作者、出版社、课程内容等。然后，它创建一个Courses对象，并将这些参数设置为...

package com.lanou.servlet.role; import java.io.IOException; 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 com.lanou.bean.Admin; import com.lanou.bean.Result; import com.lanou.bean.Role; import com.lanou.service.AdminService; import com.lanou.service.RoleMenuService; import com.lanou.service.impl.AdminServiceImpl; import com.lanou.service.impl.RoleMenuServiceImpl; import com.lanou.util.FastJSONUtil; @WebServlet("/admin/delRole") public class DeleteRole extends HttpServlet{ private static final long serialVersionUID = 1L; RoleMenuService roleMenuService = new RoleMenuServiceImpl(); @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { Role role = (Role) req.getSession().getAttribute("role"); long roleId = Long.parseLong(req.getParameter("roleId")); boolean isDelete = false; // 只有超级管理员有权限删除 if (role.getRoleId() == 1) { isDelete = roleMenuService.delRMByRoleId(roleId); } Result result = null; if (isDelete) { result = new Result(0, "删除成功", null, null); }else { result = new Result(1, "删除失败", null, null); } System.out.println(result.getCode()); resp.setContentType("type/json;charset=utf-8"); resp.getWriter().write(FastJSONUtil.entityToJson(result)); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req, resp); } }

这是一个名为DeleteRole的Servlet类，用于处理删除角色的请求。下面是代码的解析： 1. doGet()方法用于处理GET请求。 2. 从会话中获取当前登录用户的角色对象： java Role role = (Role) req....

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