SSM登陆

简单的SSM登陆

• jsp

<form action="${pageContext.request.contextPath }/user/login.action">
<label>用户名：</label>
<br>
<input type="text" name="username">
<br>
<label>密码：</label>
<br>
<input type="password" name="password">
<br>
<input type="submit" value="登陆">

</form>

• 跳转为/user/login.action
• controller层代码

@Controller
    @RequestMapping("/user")
    public class UserController {
//跳转登陆界面
    @Autowired
    private LoginService loginService;
    
        @RequestMapping("/toLogin")
        public String toLogin() {        
            return "login";
        }
//登陆操作
        @RequestMapping("login")
        public String login(String username, String password, HttpSession session) {
            
            //if(username!=null&&!("".equals(username))) {
            
            // 校验用户登录
            System.out.println(username);
            System.out.println(password);
            // 把用户名放到session中
            session.setAttribute("username", username);
            Map<String, String> parameters = new HashMap<String, String>();
            parameters.put("username", username);
            parameters.put("password", password);
            Login user = this.loginService.selectUserByUsernameAndPassword(parameters);
            if (user != null) {
                System.out.println("你真他妈的是个人才，竟然猜对了！！");
                return "redirect:/item/itemList.action";
            } else {
                System.out.println("去你妈的！账号输错了！！");
                return "redirect:/user/toLogin.action";
                
            }
        
            
            }

• Service

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

• ServiceImpl

@Service
public class LoginServiceImpl implements LoginService {
    @Autowired
    private LoginMapper loginMapper;

    @Override
    public Login selectUserByUsernameAndPassword(Map<String, String> parameters) {
        // TODO Auto-generated method stub
        return this.loginMapper.findWithLoginAndPassword(parameters);
    }

    
}

• Mapper层

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

• Mapperxml

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

• 实体类

public class Login {
    private Integer id;

    private String username;

    private String password;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username == null ? null : username.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }
}

•  数据库

• 测试

 

 

 记得写注册和登陆加密呀！！！！！！！