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！！！！！！！