尚筹网：登录功能

爱被打了一巴掌 2023-06-25 02:10 36阅读 0赞

# 登录流程分析 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70]

# handler方法 #

![在这里插入图片描述][20191226163329334.png]  
所在工程：atcrowdfunding-admin-2-component  
全类名：com.atguigu.crowd.funding.handler.AdminHandler

@RequestMapping("/admin/do/login")
    public String doLogin(
    		@RequestParam("loginAcct") String loginAcct,
    		@RequestParam("userPswd") String userPswd,
    		Model model,
    		HttpSession session) {
        
    	
    	// 调用adminService的login方法执行登录业务逻辑，返回查询到的Admin对象
    	Admin admin = adminService.login(loginAcct, userPswd);
    	
    	// 判断admin是否为null
    	if(admin == null) {
        
    		
    		model.addAttribute("MESSAGE", "登录账号或密码不正确！请核对后再登录！");
    		
    		return "admin-login";
    	}
    	
    	session.setAttribute("LOGIN-ADMIN", admin);
    	
    	return "admin-main";
    }

# 后台主页面 #

所在工程：atcrowdfunding-admin-1-webui  
文件位置：  
![在这里插入图片描述][20191224141802370.png]  
内容：

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>❤汇聚点滴的力量，成就非凡的伟业❤</title>
    </head>
    <body>
    	<h1>后台主页面</h1>
    	${sessionScope['LOGIN-ADMIN'] }
    </body>
    </html>

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 1]

# service方法 #

@Override
    public Admin login(String loginAcct, String userPswd) {
        
    	
    	// 根据loginAcct查询数据库
    	AdminExample adminExample = new AdminExample();
    	
    	adminExample.createCriteria().andLoginAcctEqualTo(loginAcct);
    	
    	// 执行查询
    	List<Admin> list = adminMapper.selectByExample(adminExample);
    	
    	if(!CrowdFundingUtils.collectionEffective(list)) {
        
    		
    		// 如果查询结果集合无效，则直接返回null
    		return null;
    	}
    	
    	// 获取唯一集合元素
    	Admin admin = list.get(0);
    	
    	// 确认admin不为null
    	if(admin == null) {
        
    		
    		return null;
    	}
    	
    	// 比较密码
    	String userPswdDataBase = admin.getUserPswd();
    	
    	String userPswdBroswer = CrowdFundingUtils.md5(userPswd);
    	
    	if(Objects.equals(userPswdBroswer, userPswdDataBase)) {
        
    		
    		// 如果两个密码相等那么说明登录能够成功，返回Admin对象
    		return admin;
    	}
    	
    	return null;
    }

在spring-persist-tx.xml配置文件中加入事务属性配置

<tx:method name="login" read-only="true"/>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191224123456830.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg==,size_16,color_FFFFFF,t_70
[20191226163329334.png]: https://img-blog.csdnimg.cn/20191226163329334.png
[20191224141802370.png]: https://img-blog.csdnimg.cn/20191224141802370.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191224144344229.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3poaXpoZW5nZ3Vhbg==,size_16,color_FFFFFF,t_70