SSM (IDEA) —— 实现登录注销

resources里所有配置文件和LoginInterceptor登录拦截器的实现，博主之前的文章里有一篇统一的放过代码，这里就不放了。另外StudentDao，Student，StudentExample都是通过mybatis逆向工程生成的，具体实现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方法实现
    @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","用户名或密码错误");
            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","用户名或密码错误");
            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>

    ${msg}
    <%-- 提交后的位置：/WEB-INF/jsp/login.jsp--%>
    <form action="${pageContext.request.contextPath }/login" method="post" >
        姓名：<input id="username" type="text" name="username" />
        <br />
        密码：<input id="password" type="password" name="password" />
        <br />
        <input type="submit" value="登录" />
    </form>

list

<form action="${pageContext.request.contextPath }/logout">
    <input type="submit" value="注销" />
</form>

SSM (IDEA) —— 实现登录注销

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