spring mvc 注解实例

package com.zt.controller; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; import com.zt.bean.Student; import com.zt.service.StudentService; @Controller public class StudentController { @Autowired private StudentService studentService; /** * 根据用户名查询集合 * @return 用户集合 */ @RequestMapping(value="/login",method=RequestMethod.GET) public ModelAndView loginForm(String user) { ModelAndView mav = new ModelAndView("login"); List<Student> ls=studentService.findAll(); mav.getModelMap().put("list", ls); return mav; } /** * 根据用户名查询用户集合 * @param name 用户名 * @return 用户集合 */ @RequestMapping(value="/getName" ,method=RequestMethod.POST) public ModelAndView loginFormByName(String name){ ModelAndView mav = new ModelAndView("login"); System.out.println("=========================================="); List<Student> ls=studentService.searchContacts(name); mav.getModelMap().put("list", ls); return mav; } /** * 根据传入的用户id跳转到用户修改页面 * @param id 用户id * @return 讲选中的用户信息传到修改页面上 */ @RequestMapping(value="/getStu",method=RequestMethod.GET) public ModelAndView getStu(int id){ ModelAndView mav = new ModelAndView("update"); Student stu=studentService.getById(id); mav.getModelMap().put("student", stu); return mav; } /** *修改用户信息 * @param id 要修改用户的id * @param name 修改用户的用户名 * @param psw 修改后的密码 * @return */ @RequestMapping(value="/updateStu",method=RequestMethod.POST) public String update(int id,String name,String psw){ Student stud=studentService.getById(id); stud.setName(name); stud.setPsw(psw); studentService.update(stud); return "redirect:login.do"; } /** * 根据传入的id删除用户 * @param id 用户id * @return 删除成功后返回用户集合页面 */ @RequestMapping(value="/delStu",method=RequestMethod.GET) public String del(int id){ studentService.delete(id); return "redirect:login.do"; } /** * 跳转到添加页面 * @return */ @RequestMapping("add") public String addjsp(){ return "add"; } /** * 添加用户 * @param name 用户名 * @param psw 密码 * @return 添加成功后跳转到显示用户界面 */ @RequestMapping(value="/addStu" ,method=RequestMethod.POST) public String add(String name,String psw){ Student stu=new Student(name,psw); studentService.save(stu); return "redirect:login.do"; } /** * 注册用户 * @param name 用户名 * @param psw 密码 * @return 注册成功后 返回到登录页面 */ @RequestMapping(value="/regaddStu" ,method=RequestMethod.POST) public String regadd(String name,String psw){ Student stu=new Student(name,psw); studentService.save(stu); return "index"; } /** * 登录 * @param name 用户名 * @param psw 密码 * @param session 用session保存用户 * @return 登录成功后 返回到显示用户界面 */ @RequestMapping(value="/gologin",method=RequestMethod.POST) public String gologin(String name,String psw,HttpSession session){ if(studentService.loginStudent(name, psw)){ session.setAttribute("user", name); System.out.println(name+"------===controller"); return "redirect:login.do"; }else { return "redirect:mes.do"; } } /** * 用户登录失败 返回错误信息 * @return */ @RequestMapping(value="/mes") public ModelAndView mes(){ ModelAndView mav=new ModelAndView("index"); mav.getModelMap().put("message", "用户名或密码错误！"); return mav; } /** * 退出 * @param request * @return */ @RequestMapping("exit") public ModelAndView exit(HttpServletRequest request){ ModelAndView mav = new ModelAndView("index"); request.getSession().removeAttribute("user"); return mav; } /** * 验证用户名是否存在 * @param response * @param request * @return * @throws IOException */ @RequestMapping("isExistName") public String isName(HttpServletResponse response,HttpServletRequest request) throws IOException{ PrintWriter out = response.getWriter(); if(request.getParameter("username")==""){ request.getSession().setAttribute("flag", "请输入查询的名字！"); } else if(studentService.isExistName(request.getParameter("username"))){ request.getSession().setAttribute("flag", "该用户名可以使用！"); out.print(true); }else{ request.getSession().setAttribute("flag", "该用户名已存在！"); out.print(false); } return "redirect:login.do"; } }