Spring boot 攔截器、登陸攔截
阿新 • • 發佈:2018-12-29
Springboot專案怎麼使用攔截器
在這裡小小推薦下我的個人部落格
簡書:雷園的簡書
- 建立一個攔截器並實現HandlerInterceptor介面
package com.leiyuan.bs.interceptor; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; // 攔截器 public class MyHandlerInterceptor implements HandlerInterceptor { /** * 攔截(Controller方法呼叫之前) * * @param request request * @param response response * @param o o * @return 通過與否 * @throws Exception 異常處理 */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception { // TODO 我這裡是通過使用者是否登陸進行攔截,我的使用者資訊儲存在session中,名稱為userSession,大家可以自行實現 if (request.getSession().getAttribute("userSession") == null) { // 攔截至登陸頁面 request.getRequestDispatcher("/user/toLogin").forward(request, response); // false為不通過 return false; } // true為通過 return true; } // 此方法為處理請求之後呼叫(呼叫過controller方法之後,跳轉檢視之前) @Override public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception { } // 此方法為整個請求結束之後進行呼叫 @Override public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception { } }
- 建立一個配置類MyHandlerInterceptorConfig並繼承WebMvcConfigurerAdapter類重寫addInterceptors(InterceptorRegistry registry)方法
package com.leiyuan.bs; import com.leiyuan.bs.interceptor.MyHandlerInterceptor; import org.springframework.stereotype.Component; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; // 攔截器配置類 @Component public class MyHandlerInterceptorConfig extends WebMvcConfigurerAdapter { @Override public void addInterceptors(InterceptorRegistry registry) { /** * 這裡的addPathPatterns("/**")為配置需要攔截的方法“/**”代表所有,而後excludePathPatterns("/user/toLogin")等方法為排除哪些方法不進行 攔截 */ registry.addInterceptor(new MyHandlerInterceptor()).addPathPatterns("/**").excludePathPatterns("/user/toLogin").excludePathPatterns ("/user/login").excludePathPatterns("/user/toNewUser").excludePathPatterns("/user/newUser"); super.addInterceptors(registry); } }
- 啟動專案即可看到效果了