增加springmvc 全局异常处理、拦截器示例代码

spring/springmvc-base-annotation/README.md

@@ -1 +0,0 @@
-springmvc-base-annotation

spring/springmvc-base-annotation/src/main/java/com/heibaiying/config/ServletConfig.java

@@ -1,14 +1,21 @@
 package com.heibaiying.config;
 
+import com.heibaiying.exception.NoAuthExceptionResolver;
+import com.heibaiying.interceptors.MyFirstInterceptor;
+import com.heibaiying.interceptors.MySecondInterceptor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.HandlerExceptionResolver;
 import org.springframework.web.servlet.ViewResolver;
 import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 import org.springframework.web.servlet.view.InternalResourceViewResolver;
 
+import java.util.List;
+
 /**
  * @author : heibaiying
  */
@@ -32,8 +39,23 @@ public class ServletConfig implements WebMvcConfigurer {
     /**
      * 配置静态资源处理器
      */
-
     public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
         configurer.enable();
     }
+
+    /**
+     * 添加自定义拦截器
+     */
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(new MyFirstInterceptor()).addPathPatterns("/mvc/**").excludePathPatterns("mvc/login");
+        registry.addInterceptor(new MySecondInterceptor()).addPathPatterns("/mvc/**");
+    }
+
+
+    /**
+     * 添加全局异常处理器
+     */
+    public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> resolvers) {
+        resolvers.add(new NoAuthExceptionResolver());
+    }
 }

spring/springmvc-base-annotation/src/main/java/com/heibaiying/controller/HelloController.java

@@ -1,5 +1,6 @@
 package com.heibaiying.controller;
 
+import com.heibaiying.exception.NoAuthException;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 
@@ -16,4 +17,10 @@ public class HelloController {
     private String hello() {
         return "hello";
     }
+
+
+    @RequestMapping("auth")
+    private void auth() {
+        throw new NoAuthException("没有对应的访问权限！");
+    }
 }

spring/springmvc-base-annotation/src/main/java/com/heibaiying/exception/NoAuthException.java

@@ -0,0 +1,25 @@
+package com.heibaiying.exception;
+
+/**
+ * @author : heibaiying
+ * @description : 自定义无权限异常
+ */
+public class NoAuthException extends RuntimeException {
+
+    public NoAuthException() {
+        super();
+    }
+
+    public NoAuthException(String message) {
+        super(message);
+    }
+
+    public NoAuthException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public NoAuthException(Throwable cause) {
+        super(cause);
+    }
+
+}

spring/springmvc-base-annotation/src/main/java/com/heibaiying/exception/NoAuthExceptionResolver.java

@@ -0,0 +1,26 @@
+package com.heibaiying.exception;
+
+import org.springframework.web.servlet.HandlerExceptionResolver;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author : heibaiying
+ * @description : 无权限异常处理机制
+ */
+public class NoAuthExceptionResolver implements HandlerExceptionResolver {
+
+    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+        if (ex instanceof NoAuthException && !isAjax(request)) {
+            return new ModelAndView("NoAuthPage");
+        }
+        return new ModelAndView();
+    }
+
+    // 判断是否是Ajax请求
+    private boolean isAjax(HttpServletRequest request) {
+        return "XMLHttpRequest".equalsIgnoreCase(request.getHeader("X-Requested-With"));
+    }
+}

spring/springmvc-base-annotation/src/main/java/com/heibaiying/interceptors/MyFirstInterceptor.java

@@ -0,0 +1,27 @@
+package com.heibaiying.interceptors;
+
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author : heibaiying
+ * @description : spring5 中 preHandle，postHandle，afterCompletion 在接口中被声明为默认方法
+ */
+public class MyFirstInterceptor implements HandlerInterceptor {
+
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
+        System.out.println("进入第一个拦截器preHandle");
+        return true;
+    }
+
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
+        System.out.println("进入第一个拦截器postHandle");
+    }
+
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+        System.out.println("进入第一个拦截器afterCompletion");
+    }
+}

spring/springmvc-base-annotation/src/main/java/com/heibaiying/interceptors/MySecondInterceptor.java

@@ -0,0 +1,27 @@
+package com.heibaiying.interceptors;
+
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author : heibaiying
+ * @description : spring5 中 preHandle，postHandle，afterCompletion 在接口中被声明为默认方法
+ */
+public class MySecondInterceptor implements HandlerInterceptor {
+
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
+        System.out.println("进入第二个拦截器preHandle");
+        return true;
+    }
+
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
+        System.out.println("进入第二个拦截器postHandle");
+    }
+
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+        System.out.println("进入第二个拦截器afterCompletion");
+    }
+}

spring/springmvc-base-annotation/src/main/webapp/WEB-INF/jsp/NoAuthPage.jsp

@@ -0,0 +1,9 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>Title</title>
+</head>
+<body>
+    没有对应的访问权限！
+</body>
+</html>

spring/springmvc-base/pom.xml

@@ -39,6 +39,22 @@
             <artifactId>spring-webmvc</artifactId>
             <version>${spring-base-version}</version>
         </dependency>
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>javax.servlet-api</artifactId>
+            <version>4.0.1</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>fastjson</artifactId>
+            <version>1.2.54</version>
+        </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>27.0.1-jre</version>
+        </dependency>
     </dependencies>
 
 </project>

spring/springmvc-base/src/main/java/com/heibaiying/controller/HelloController.java

@@ -1,8 +1,10 @@
 package com.heibaiying.controller;
 
+import com.heibaiying.exception.NoAuthException;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 
+
 /**
  * @author : heibaiying
  * @description : hello spring
@@ -16,4 +18,10 @@ public class HelloController {
     private String hello() {
         return "hello";
     }
+
+
+    @RequestMapping("auth")
+    private void auth() {
+        throw new NoAuthException("没有对应的访问权限！");
+    }
 }

spring/springmvc-base/src/main/java/com/heibaiying/exception/NoAuthException.java

@@ -0,0 +1,25 @@
+package com.heibaiying.exception;
+
+/**
+ * @author : heibaiying
+ * @description : 自定义无权限异常
+ */
+public class NoAuthException extends RuntimeException {
+
+    public NoAuthException() {
+        super();
+    }
+
+    public NoAuthException(String message) {
+        super(message);
+    }
+
+    public NoAuthException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public NoAuthException(Throwable cause) {
+        super(cause);
+    }
+
+}

spring/springmvc-base/src/main/java/com/heibaiying/exception/NoAuthExceptionResolver.java

@@ -0,0 +1,26 @@
+package com.heibaiying.exception;
+
+import org.springframework.web.servlet.HandlerExceptionResolver;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author : heibaiying
+ * @description : 无权限异常处理机制
+ */
+public class NoAuthExceptionResolver implements HandlerExceptionResolver {
+
+    public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+        if (ex instanceof NoAuthException && !isAjax(request)) {
+            return new ModelAndView("NoAuthPage");
+        }
+        return new ModelAndView();
+    }
+
+    // 判断是否是Ajax请求
+    private boolean isAjax(HttpServletRequest request) {
+        return "XMLHttpRequest".equalsIgnoreCase(request.getHeader("X-Requested-With"));
+    }
+}

spring/springmvc-base/src/main/java/com/heibaiying/interceptors/MyFirstInterceptor.java

@@ -0,0 +1,27 @@
+package com.heibaiying.interceptors;
+
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author : heibaiying
+ * @description : spring5 中 preHandle，postHandle，afterCompletion 在接口中被声明为默认方法
+ */
+public class MyFirstInterceptor implements HandlerInterceptor {
+
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
+        System.out.println("进入第一个拦截器preHandle");
+        return true;
+    }
+
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
+        System.out.println("进入第一个拦截器postHandle");
+    }
+
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+        System.out.println("进入第一个拦截器afterCompletion");
+    }
+}

spring/springmvc-base/src/main/java/com/heibaiying/interceptors/MySecondInterceptor.java

@@ -0,0 +1,27 @@
+package com.heibaiying.interceptors;
+
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author : heibaiying
+ * @description : spring5 中 preHandle，postHandle，afterCompletion 在接口中被声明为默认方法
+ */
+public class MySecondInterceptor implements HandlerInterceptor {
+
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
+        System.out.println("进入第二个拦截器preHandle");
+        return true;
+    }
+
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
+        System.out.println("进入第二个拦截器postHandle");
+    }
+
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
+        System.out.println("进入第二个拦截器afterCompletion");
+    }
+}

spring/springmvc-base/src/main/resources/springApplication.xml

@@ -24,4 +24,21 @@
         <!-- 后缀 -->
         <property name="suffix" value=".jsp"/>
     </bean>
+
+    <!--配置拦截器-->
+    <mvc:interceptors>
+        <mvc:interceptor>
+            <mvc:mapping path="/mvc/**"/>
+            <mvc:exclude-mapping path="/mvc/login"/>
+            <bean class="com.heibaiying.interceptors.MyFirstInterceptor"/>
+        </mvc:interceptor>
+        <mvc:interceptor>
+            <mvc:mapping path="/mvc/**"/>
+            <bean class="com.heibaiying.interceptors.MySecondInterceptor"/>
+        </mvc:interceptor>
+    </mvc:interceptors>
+
+    <!--配置全局异常处理器-->
+    <bean class="com.heibaiying.exception.NoAuthExceptionResolver"/>
+
 </beans>

spring/springmvc-base/src/main/webapp/WEB-INF/jsp/NoAuthPage.jsp

@@ -0,0 +1,9 @@
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<html>
+<head>
+    <title>Title</title>
+</head>
+<body>
+    没有对应的访问权限！
+</body>
+</html>