Spring Boot中使用过滤器和拦截器

26.Spring-Boot-Filter-Interceptor/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+
+	<groupId>com.springboot</groupId>
+	<artifactId>Spring-Boot-Filter-Interceptor</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<packaging>jar</packaging>
+
+	<name>Spring-Boot-Filter-Interceptor</name>
+	<description>Demo project for Spring Boot</description>
+
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>1.5.14.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+		<java.version>1.8</java.version>
+	</properties>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+
+</project>

26.Spring-Boot-Filter-Interceptor/src/main/java/cc/mrbird/Application.java

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+package cc.mrbird;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

26.Spring-Boot-Filter-Interceptor/src/main/java/cc/mrbird/config/WebConfig.java

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+package cc.mrbird.config;
+
+import cc.mrbird.filter.TimeFilter;
+import cc.mrbird.interceptor.TimeInterceptor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Configuration
+public class WebConfig extends WebMvcConfigurerAdapter {
+    @Bean
+    public FilterRegistrationBean timeFilter() {
+        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
+        TimeFilter timeFilter = new TimeFilter();
+        filterRegistrationBean.setFilter(timeFilter);
+
+        List<String> urlList = new ArrayList<>();
+        urlList.add("/*");
+
+        filterRegistrationBean.setUrlPatterns(urlList);
+        return filterRegistrationBean;
+    }
+
+    @Autowired
+    private TimeInterceptor timeInterceptor;
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(timeInterceptor);
+    }
+}

26.Spring-Boot-Filter-Interceptor/src/main/java/cc/mrbird/controller/UserController.java

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+package cc.mrbird.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("user")
+public class UserController {
+
+    @GetMapping("/{id:\\d+}")
+    public void get(@PathVariable String id) {
+        System.out.println(id);
+        // throw new RuntimeException("user not exist");
+    }
+}

26.Spring-Boot-Filter-Interceptor/src/main/java/cc/mrbird/filter/TimeFilter.java

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+package cc.mrbird.filter;
+
+import org.springframework.stereotype.Component;
+
+import javax.servlet.*;
+import javax.servlet.annotation.WebFilter;
+import java.io.IOException;
+import java.util.Date;
+
+// @Component
+// @WebFilter(urlPatterns = {"/*"})
+public class TimeFilter implements Filter {
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+        System.out.println("过滤器初始化");
+    }
+
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
+        System.out.println("开始执行过滤器");
+        Long start = new Date().getTime();
+        filterChain.doFilter(servletRequest, servletResponse);
+        System.out.println("【过滤器】耗时 " + (new Date().getTime() - start));
+        System.out.println("结束执行过滤器");
+    }
+
+    @Override
+    public void destroy() {
+        System.out.println("过滤器销毁");
+    }
+}

26.Spring-Boot-Filter-Interceptor/src/main/java/cc/mrbird/interceptor/TimeInterceptor.java

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+package cc.mrbird.interceptor;
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.method.HandlerMethod;
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.util.Date;
+
+@Component
+public class TimeInterceptor implements HandlerInterceptor {
+    @Override
+    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
+        System.out.println("处理拦截之前");
+        httpServletRequest.setAttribute("startTime", new Date().getTime());
+        System.out.println(((HandlerMethod) o).getBean().getClass().getName());
+        System.out.println(((HandlerMethod) o).getMethod().getName());
+        return true;
+    }
+
+    @Override
+    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
+        System.out.println("开始处理拦截");
+        Long start = (Long) httpServletRequest.getAttribute("startTime");
+        System.out.println("【拦截器】耗时 " + (new Date().getTime() - start));
+    }
+
+    @Override
+    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
+        System.out.println("处理拦截之后");
+        Long start = (Long) httpServletRequest.getAttribute("startTime");
+        System.out.println("【拦截器】耗时 " + (new Date().getTime() - start));
+        System.out.println("异常信息 " + e);
+    }
+}

26.Spring-Boot-Filter-Interceptor/src/main/resources/resources/error/500.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>500</title>
+</head>
+<body>
+    系统内部异常
+</body>
+</html>

26.Spring-Boot-Filter-Interceptor/src/test/java/cc/mrbird/cc/mrbird/demo/ApplicationTests.java

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+package cc.mrbird.cc.mrbird.demo;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class ApplicationTests {
+
+	@Test
+	public void contextLoads() {
+	}
+
+}