SSM登陆

简单的SSM登陆

 1 <form action="${pageContext.request.contextPath }/user/login.action">
 2 <label>用户名：</label>
 3 <br>
 4 <input type="text" name="username">
 5 <br>
 6 <label>密码：</label>
 7 <br>
 8 <input type="password" name="password">
 9 <br>
10 <input type="submit" value="登陆">
11 
12 </form>

跳转为/user/login.action
controller层代码

 1 @Controller
 2     @RequestMapping("/user")
 3     public class UserController {
 4 //跳转登陆界面
 5     @Autowired
 6     private LoginService loginService;
 7     
 8         @RequestMapping("/toLogin")
 9         public String toLogin() {        
10             return "login";
11         }
12 //登陆操作
13         @RequestMapping("login")
14         public String login(String username, String password, HttpSession session) {
15             
16             //if(username!=null&&!("".equals(username))) {
17             
18             // 校验用户登录
19             System.out.println(username);
20             System.out.println(password);
21             // 把用户名放到session中
22             session.setAttribute("username", username);
23             Map<String, String> parameters = new HashMap<String, String>();
24             parameters.put("username", username);
25             parameters.put("password", password);
26             Login user = this.loginService.selectUserByUsernameAndPassword(parameters);
27             if (user != null) {
28                 System.out.println("你真他妈的是个人才，竟然猜对了！！");
29                 return "redirect:/item/itemList.action";
30             } else {
31                 System.out.println("去你妈的！账号输错了！！");
32                 return "redirect:/user/toLogin.action";
33                 
34             }
35         
36             
37             }

Service

1 public interface LoginService {
2     Login selectUserByUsernameAndPassword(Map<String, String> parameters);
3 }

ServiceImpl

 1 @Service
 2 public class LoginServiceImpl implements LoginService {
 3     @Autowired
 4     private LoginMapper loginMapper;
 5 
 6     @Override
 7     public Login selectUserByUsernameAndPassword(Map<String, String> parameters) {
 8         // TODO Auto-generated method stub
 9         return this.loginMapper.findWithLoginAndPassword(parameters);
10     }
11 
12     
13 }

Mapper层

1 Login findWithLoginAndPassword(Map<String, String> parameters);

Mapperxml

1 <select id="findWithLoginAndPassword" resultMap="BaseResultMap" parameterType="cn.itcast.ssm.pojo.LoginExample" >
2     select * from login where username=#{username} and password=#{password}
3   </select>

实体类

 1 public class Login {
 2     private Integer id;
 3 
 4     private String username;
 5 
 6     private String password;
 7 
 8     public Integer getId() {
 9         return id;
10     }
11 
12     public void setId(Integer id) {
13         this.id = id;
14     }
15 
16     public String getUsername() {
17         return username;
18     }
19 
20     public void setUsername(String username) {
21         this.username = username == null ? null : username.trim();
22     }
23 
24     public String getPassword() {
25         return password;
26     }
27 
28     public void setPassword(String password) {
29         this.password = password == null ? null : password.trim();
30     }
31 }

数据库

测试

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