Spring Boot 2.x 配置拦截器

spring-boot-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>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.1.2.RELEASE</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>site.exception</groupId>
+	<artifactId>spring-boot-interceptor</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>spring-boot-interceptor</name>
+	<description>Demo project for Spring Boot</description>
+
+	<properties>
+		<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>

spring-boot-interceptor/src/main/java/site/exception/springbootinterceptor/Controller/TestController.java

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+package site.exception.springbootinterceptor.Controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author www.exception.site (exception 教程网)
+ * @date 2019/2/28
+ * @time 19:21
+ * @discription
+ **/
+@RestController
+public class TestController {
+
+    @GetMapping("/admin/test")
+    public String test() {
+        System.out.println("test");
+        return "success";
+    }
+}

spring-boot-interceptor/src/main/java/site/exception/springbootinterceptor/SpringBootInterceptorApplication.java

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+package site.exception.springbootinterceptor;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootInterceptorApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringBootInterceptorApplication.class, args);
+	}
+
+}

spring-boot-interceptor/src/main/java/site/exception/springbootinterceptor/config/WebMvcConfig.java

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+package site.exception.springbootinterceptor.config;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import site.exception.springbootinterceptor.interceptor.LoginValidationInterceptor;
+
+/**
+ * @author www.exception.site (exception 教程网)
+ * @date 2019/2/27
+ * @time 12:17
+ * @discription
+ **/
+@Configuration
+public class WebMvcConfig implements WebMvcConfigurer {
+
+    /**
+     * 配置拦截器
+     * @param interceptorRegistry
+     */
+    @Override
+    public void addInterceptors(InterceptorRegistry interceptorRegistry) {
+        // 拦截所有 /admin/** 的访问地址
+        interceptorRegistry.addInterceptor(new LoginValidationInterceptor()).addPathPatterns("/admin/**");
+    }
+}

spring-boot-interceptor/src/main/java/site/exception/springbootinterceptor/entity/User.java

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+package site.exception.springbootinterceptor.entity;
+
+import java.io.Serializable;
+
+/**
+ * @author www.exception.site (exception 教程网)
+ * @date 2019/3/1
+ * @time 21:15
+ * @discription
+ **/
+public class User implements Serializable {
+    private String usernmae;
+    private String password;
+
+    public String getUsernmae() {
+        return usernmae;
+    }
+
+    public void setUsernmae(String usernmae) {
+        this.usernmae = usernmae;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

spring-boot-interceptor/src/main/java/site/exception/springbootinterceptor/interceptor/LoginValidationInterceptor.java

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+package site.exception.springbootinterceptor.interceptor;
+
+import org.springframework.lang.Nullable;
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+import site.exception.springbootinterceptor.entity.User;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * @author www.exception.site (exception 教程网)
+ * @date 2019/2/27
+ * @time 12:19
+ * @discription 登录验证拦截器
+ **/
+public class LoginValidationInterceptor implements HandlerInterceptor {
+
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
+        System.out.println("preHandle ...");
+        User user = (User) request.getSession().getAttribute("user");
+        if (user == null) {
+            // 若未登录，重定向到登录页面
+            response.sendRedirect("login.html");
+            return false;
+        }
+        // 若已登录，继续往下执行
+        return true;
+    }
+
+    @Override
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception {
+        System.out.println("postHandle ...");
+        // controller 方法调用完毕后，执行此方法
+    }
+
+    @Override
+    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception {
+        System.out.println("afterCompletion ...");
+        // 页面渲染完成后调用此方法, 一般用来清除某些资源等
+    }
+}

spring-boot-interceptor/src/main/resources/application.properties

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+server.port=8081

spring-boot-interceptor/src/test/java/site/exception/springbootinterceptor/SpringBootInterceptorApplicationTests.java

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+package site.exception.springbootinterceptor;
+
+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 SpringBootInterceptorApplicationTests {
+
+	@Test
+	public void contextLoads() {
+	}
+
+}