Spring Boot笔记-拦截器相关（用户权限方面）

Spring Boot拦截器的使用

使用注解@Configuration

继承WebMvcConfigurerAdapter

重写addInterceptors添加需要拦截器地址：

运行截图如下：

后端拦截如下：

这里主要是依靠注册拦截器实现的

这里一个拦截器可以进行多个链接过滤，只需在后面加入addPathPatterns即可

程序结构如下：

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 {/*** 在请求处理之前进行调用（Controller方法调用之前）*/@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");}/*** 在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行* （主要是用于进行资源清理工作）*/@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 {/*** 在请求处理之前进行调用（Controller方法调用之前）*/@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");}/*** 在整个请求结束之后被调用，也就是在DispatcherServlet 渲染了对应的视图之后执行* （主要是用于进行资源清理工作）*/@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response,Object object, Exception ex)throws Exception {System.out.println("TwoController afterCompletion");}
}

index相关.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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