Spring Boot攔截器的使用

使用注解@Configuration

繼承WebMvcConfigurerAdapter

重寫addInterceptors添加需要攔截器地址：

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運行截圖如下：

后端攔截如下：

這里主要是依靠注冊攔截器實現(xiàn)的

這里一個攔截器可以進行多個鏈接過濾，只需在后面加入addPathPatterns即可

程序結構如下：

WebMvcConfig.java

package com.example.demo.config;import com.example.demo.interceptor.OneInterceptor; import com.example.demo.interceptor.TwoInterceptor; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;@Configuration public class WebMvcConfig extends WebMvcConfigurerAdapter {@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(new OneInterceptor()).addPathPatterns("/one/**");registry.addInterceptor(new TwoInterceptor()).addPathPatterns("/two/**");registry.addInterceptor(new OneInterceptor()).addPathPatterns("/three/**");registry.addInterceptor(new TwoInterceptor()).addPathPatterns("/three/**");super.addInterceptors(registry);} }

OneController.java

package com.example.demo.interceptor;import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping;@Controller @RequestMapping("one") public class OneController {@RequestMapping("/index")public String index(){return "index";}@RequestMapping("/index2")public String index2(){return "index2";}@RequestMapping("/index3")public String index3(){return "index3";} }

OneInterceptor.java

package com.example.demo.interceptor;import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;public class OneInterceptor implements HandlerInterceptor {/*** 在請求處理之前進行調(diào)用（Controller方法調(diào)用之前）*/@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response,Object object) throws Exception {System.out.println("OneInterceptor preHandle");return true;}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response,Object object, ModelAndView mv)throws Exception {System.out.println("OneInterceptor postHandle");}/*** 在整個請求結束之后被調(diào)用，也就是在DispatcherServlet 渲染了對應的視圖之后執(zhí)行* （主要是用于進行資源清理工作）*/@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response,Object object, Exception ex)throws Exception {System.out.println("OneInterceptor afterCompletion");} }

ThreeController.java

package com.example.demo.interceptor;import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping;@Controller @RequestMapping("three") public class ThreeController {@RequestMapping("/index")public String index(){return "index";}@RequestMapping("/index2")public String index2(){return "index2";}@RequestMapping("/index3")public String index3(){return "index3";} }

TwoController.java

package com.example.demo.interceptor;import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;@Controller @RequestMapping("two") public class TwoController{@RequestMapping("/index")public String index(){return "index";}@RequestMapping("/index2")public String index2(){return "index2";}@RequestMapping("/index3")public String index3(){return "index3";} }

TwoInterceptor.java

package com.example.demo.interceptor;import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;public class TwoInterceptor implements HandlerInterceptor {/*** 在請求處理之前進行調(diào)用（Controller方法調(diào)用之前）*/@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response,Object object) throws Exception {System.out.println("TwoController preHandle");return false;}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response,Object object, ModelAndView mv)throws Exception {System.out.println("TwoController postHandle");}/*** 在整個請求結束之后被調(diào)用，也就是在DispatcherServlet 渲染了對應的視圖之后執(zhí)行* （主要是用于進行資源清理工作）*/@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response,Object object, Exception ex)throws Exception {System.out.println("TwoController afterCompletion");} }

index相關.html

<!DOCTYPE html> <html lang="en"> <head><meta charset="UTF-8"><title>INDEX</title> </head> <body> <h1>INDEX PAGE</h1> </body> </html>

porn.xml

<?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 https://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>2.1.12.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><name>demo</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.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

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