SSM (IDEA) —— 實現登入登出
阿新 • • 發佈：2018-12-09
resources裡所有配置檔案和LoginInterceptor登入攔截器的實現，博主之前的文章裡有一篇統一的放過程式碼，這裡就不放了。另外StudentDao，Student，StudentExample都是通過mybatis逆向工程生成的，具體實現方法博主之前文章也有
StudentService
package com.etc.service; import com.etc.dao.StudentDao; import com.etc.entity.Student; import com.etc.entity.StudentExample; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class StudentService { @Autowired private StudentDao studentDao; public boolean login(Student student){ StudentExample example = new StudentExample(); example.createCriteria().andUsernameEqualTo(student.getUsername()). andPasswordEqualTo(student.getPassword()); List result = studentDao.selectByExample(example); return result.size()>0; } }
StudentController
package com.etc.controller; import com.etc.entity.Student; import com.etc.service.StudentService; import org.omg.CORBA.Request; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.http.HttpRequest; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.support.RedirectAttributes; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; @Controller public class StudentController { @Autowired private StudentService service; @RequestMapping("/tologin") public String tologin(){ System.out.println("tologin"); return "login"; } /* ModelAndView方法實現 @RequestMapping("/login") public ModelAndView login(HttpSession session, ModelAndView modelAndView, Student student){ System.out.println("login:"+student.getUsername()); session.setAttribute("username",student.getUsername()); if (service.login(student)){ modelAndView.setViewName("list"); return modelAndView; }else { modelAndView.addObject("msg","使用者名稱或密碼錯誤"); modelAndView.setViewName("login"); return modelAndView; } }*/ @RequestMapping("/login") public String login(HttpSession session, Model model, Student student){ System.out.println("login:"+student.getUsername()); session.setAttribute("username",student.getUsername()); if (service.login(student)){ return "list"; }else { model.addAttribute("msg","使用者名稱或密碼錯誤"); return "login"; } } @RequestMapping("/logout") public String logout(HttpSession session){ System.out.println("logout"); session.invalidate(); return "login"; } }
index
<body>
<h2>Hello World!</h2>
<jsp:forward page="/WEB-INF/jsp/login.jsp"/>
</body>login
${msg} <%-- 提交後的位置：/WEB-INF/jsp/login.jsp--%> <form action="${pageContext.request.contextPath }/login" method="post" > 姓名：<input id="username" type="text" name="username" /> <br /> 密碼：<input id="password" type="password" name="password" /> <br /> <input type="submit" value="登入" /> </form>
list
<form action="${pageContext.request.contextPath }/logout">
<input type="submit" value="登出" />
</form>