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@ -14,62 +14,69 @@ import javax.servlet.http.HttpSession;
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import java.io.IOException;
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import java.sql.ResultSet;
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/**
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* 处理用户登录请求的Servlet
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* 根据用户选择的身份(学生/教师/管理员)进行不同的验证逻辑
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*/
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@WebServlet("/LoginServlet")
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public class LoginServlet extends HttpServlet {
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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// 设置请求和响应的字符编码，防止中文乱码
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req.setCharacterEncoding("utf-8");
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resp.setCharacterEncoding("utf-8");
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resp.setContentType("text/html;charset=utf-8");
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// 从请求参数中获取用户输入的用户名、密码和身份
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String userName = req.getParameter("userName");
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String psw = req.getParameter("psw");
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String identity = req.getParameter("identity1");
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// 打印日志用于调试
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System.out.println(userName);
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System.out.println(psw);
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System.out.println(identity);
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// 根据用户选择的身份进行不同的验证逻辑
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if (identity.equals("学生")){//学生身份
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boolean flag = false;
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String sql = "select * from student where sname = ? and spsw = ?";
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Object[] objects = {userName, psw};
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ResultSet resultSet = StuDao.login(sql, objects);
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String sno = null;
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boolean flag = false; // 标记是否验证成功
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String sql = "select * from student where sname = ? and spsw = ?"; // SQL查询语句
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Object[] objects = {userName, psw}; // SQL查询参数
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ResultSet resultSet = StuDao.login(sql, objects); // 执行数据库查询
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String sno = null; // 学生学号
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try {
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if (resultSet.next()){
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flag = true;
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sno = resultSet.getString("sno");
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if (resultSet.next()){ // 如果查询结果不为空
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flag = true; // 验证成功
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sno = resultSet.getString("sno"); // 获取学生学号
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}
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} catch (Exception e) {
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e.printStackTrace();
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e.printStackTrace(); // 打印异常堆栈信息
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}finally {
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JdbcUtils.close(resultSet);
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JdbcUtils.close(resultSet); // 关闭结果集，释放资源
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}
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if (flag){
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if (flag){ // 验证成功
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System.out.println("登录成功!");
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//创建会话，处理请求要用
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// 创建会话，存储用户信息
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HttpSession session = req.getSession();
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session.setAttribute("userName", userName);
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// 创建请求属性对象，处理请求要用
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session.setAttribute("sno", sno);
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session.setAttribute("userName", userName); // 存储用户名
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session.setAttribute("sno", sno); // 存储学号
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System.out.println(sno);
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// 设置跳转信息并转发到提示页面
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req.setAttribute("httpUrl","/view/stu/stumainview.jsp");
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req.setAttribute("info", "登录成功!即将跳转至后台首页!");
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req.setAttribute("title","登录成功");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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// resp.sendRedirect(req.getContextPath() + "/view/stu/stumainview.jsp");
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}else {
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}else { // 验证失败
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System.out.println("用户名或密码错误!请重新登录!");
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//返回登录成功的信息
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// 设置错误信息并转发到提示页面
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req.setAttribute("httpUrl","/view/login/login.jsp");
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req.setAttribute("info", "登录失败!用户名或密码错误!即将跳转至登录页面!");
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req.setAttribute("title","登录失败");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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}
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}else
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if (identity.equals("教师")){//教师身份
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}else if (identity.equals("教师")){//教师身份
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boolean flag = false;
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String sql = "select * from teacher where tname = ? and tpsw = ?";
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Object[] objects = {userName, psw};
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@ -87,13 +94,13 @@ public class LoginServlet extends HttpServlet {
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}
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if (flag){
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System.out.println("登录成功!");
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//创建会话，处理请求要用
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// 创建会话，存储用户信息
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HttpSession session = req.getSession();
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session.setAttribute("userName", userName);
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// 创建请求属性对象，处理请求要用
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session.setAttribute("tno", tno);
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System.out.println(tno);
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// 设置跳转信息并转发到提示页面
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req.setAttribute("httpUrl","/view/tea/teamainview.jsp");
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req.setAttribute("info", "登录成功!即将跳转至后台首页!");
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req.setAttribute("title","登录成功");
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@ -101,72 +108,68 @@ public class LoginServlet extends HttpServlet {
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// resp.sendRedirect(req.getContextPath() + "/view/guide/mainview_guide.jsp");
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}else {
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System.out.println("用户名或密码错误!请重新登录!");
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//返回登录成功的信息
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// 设置错误信息并转发到提示页面
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req.setAttribute("httpUrl","/view/login/login.jsp");
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req.setAttribute("info", "登录失败!用户名或密码错误!即将跳转至登录页面!");
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req.setAttribute("title","登录失败");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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}
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}else {//如果是管理员
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boolean flag = false;
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String sql = "select * from admin where adname = ? and adpsw = ? and belong = ?";
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Object[] objects = {userName, psw, identity};
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ResultSet resultSet = SchoAdminDao.login(sql, objects);
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// String belong = null;
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try {
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if (resultSet.next()){
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flag = true;
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// belong = resultSet.getString("belong");
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}
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} catch (Exception e) {
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e.printStackTrace();
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}finally {
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JdbcUtils.close(resultSet);
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boolean flag = false;
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String sql = "select * from admin where adname = ? and adpsw = ? and belong = ?";
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Object[] objects = {userName, psw, identity};
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ResultSet resultSet = SchoAdminDao.login(sql, objects);
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try {
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if (resultSet.next()){
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flag = true;
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}
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} catch (Exception e) {
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e.printStackTrace();
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}finally {
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JdbcUtils.close(resultSet);
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}
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if (flag){
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if (identity.equals("学校")){//学校管理员
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System.out.println("登录成功!");
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HttpSession session = req.getSession();
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// 创建会话属性对象，处理请求要用
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session.setAttribute("belong", identity);
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System.out.println(identity);
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// session.setAttribute("belong", belong);
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// System.out.println(belong);
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if (flag){ // 管理员验证成功
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req.setAttribute("httpUrl","/view/schoadmin/schomainview.jsp");
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req.setAttribute("info", "登录成功!即将跳转至后台首页!");
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req.setAttribute("title","登录成功");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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}else {//二级学院管理员
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System.out.println("登录成功!");
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//创建会话，处理请求要用
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HttpSession session = req.getSession();
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// 创建请求属性对象，处理请求要用
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session.setAttribute("belong", identity);
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System.out.println(identity);
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if (identity.equals("学校")){//学校管理员
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System.out.println("登录成功!");
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HttpSession session = req.getSession();
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session.setAttribute("belong", identity); // 存储管理员所属单位
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System.out.println(identity);
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req.setAttribute("httpUrl","/view/deptadmin/deptmainview.jsp");
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req.setAttribute("info", "登录成功!即将跳转至后台首页!");
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req.setAttribute("title","登录成功");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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// resp.sendRedirect(req.getContextPath() + "/view/guide/mainview_guide.jsp");
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}
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// 设置跳转信息并转发到提示页面
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req.setAttribute("httpUrl","/view/schoadmin/schomainview.jsp");
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req.setAttribute("info", "登录成功!即将跳转至后台首页!");
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req.setAttribute("title","登录成功");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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}else {//二级学院管理员
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System.out.println("登录成功!");
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// 创建会话，存储用户信息
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HttpSession session = req.getSession();
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session.setAttribute("belong", identity);
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System.out.println(identity);
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}else {
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System.out.println("用户名或密码错误!请重新登录!");
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//返回登录成功的信息
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req.setAttribute("httpUrl","/view/login/login.jsp");
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req.setAttribute("info", "登录失败!用户名或密码错误!即将跳转至登录页面!");
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req.setAttribute("title","登录失败");
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// 设置跳转信息并转发到提示页面
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req.setAttribute("httpUrl","/view/deptadmin/deptmainview.jsp");
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req.setAttribute("info", "登录成功!即将跳转至后台首页!");
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req.setAttribute("title","登录成功");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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// resp.sendRedirect(req.getContextPath() + "/view/guide/mainview_guide.jsp");
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}
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}else {
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System.out.println("用户名或密码错误!请重新登录!");
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// 设置错误信息并转发到提示页面
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req.setAttribute("httpUrl","/view/login/login.jsp");
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req.setAttribute("info", "登录失败!用户名或密码错误!即将跳转至登录页面!");
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req.setAttribute("title","登录失败");
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req.getRequestDispatcher("/view/alluse/info.jsp").forward(req, resp);
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}
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}
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}
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@Override
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protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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doGet(req, resp);
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doGet(req, resp); // 对于POST请求，直接调用doGet方法处理
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}
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}
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}
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刘嘉成