java拦截器拦截登录和注册
时间: 2023-12-21 16:04:58 浏览: 33
以下是Java拦截器拦截登录和注册的示例代码:
1. 定义拦截器类LoginInterceptor,实现HandlerInterceptor接口,重写preHandle方法,用于拦截请求并进行登录验证。
```java
public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
HttpSession session = request.getSession();
// 判断用户是否已登录
if (session.getAttribute("user") == null) {
// 未登录,跳转到登录页面
response.sendRedirect("/login");
return false;
}
return true;
}
}
```
2. 在Spring配置文件中配置拦截器,并指定需要拦截的请求路径。
```xml
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/register"/>
<mvc:mapping path="/login"/>
<mvc:mapping path="/user/**"/>
<bean class="com.example.interceptor.LoginInterceptor"/>
</mvc:interceptor>
</mvc:interceptors>
```
3. 在Controller中处理登录和注册请求。
```java
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/register")
public String register(User user) {
userService.register(user);
return "redirect:/login";
}
@RequestMapping("/login")
public String login(User user, HttpSession session) {
User loginUser = userService.login(user);
if (loginUser != null) {
session.setAttribute("user", loginUser);
return "redirect:/user/home";
} else {
return "redirect:/login";
}
}
}
```