tlias管理系统-拦截器Interceptor快速入门

tlias-web-management/src/main/java/com/inmind/config/Webconfig.java

@@ -0,0 +1,21 @@
+package com.inmind.config;
+
+import com.inmind.interceptor.LogincheckInterceptor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+/*
+web配置类，用来注册拦截器
+ */
+@Configuration//配置类，被spring容器管理
+public class Webconfig implements WebMvcConfigurer {
+    @Autowired
+    private LogincheckInterceptor logincheckInterceptor;
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(logincheckInterceptor).addPathPatterns("/**");//拦截所有资源
+    }
+}

tlias-web-management/src/main/java/com/inmind/filter/LoginCheckFilter.java

@@ -14,7 +14,7 @@ import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 
 @Slf4j
-@WebFilter(urlPatterns = "/*")
+//@WebFilter(urlPatterns = "/*")
 public class LoginCheckFilter implements Filter {
     @Override
     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

tlias-web-management/src/main/java/com/inmind/interceptor/LogincheckInterceptor.java

@@ -0,0 +1,36 @@
+package com.inmind.interceptor;
+/*
+登录校验的拦截器类
+ */
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+
+@Component
+public class LogincheckInterceptor implements HandlerInterceptor {
+    //ctrl+O ：提示可以重写的所有方法
+
+    //controller之前执行，有返回值，true：放行 ；false：不放行
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
+        System.out.println("preHandle执行了....");
+        return true;
+    }
+
+    //controller方法执行之后执行
+    @Override
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
+        System.out.println("postHandle执行了....");
+    }
+
+    //视图渲染完毕之后,执行
+    @Override
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
+        System.out.println("afterCompletion执行了....");
+    }
+}