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 {

    @Override
    public 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）
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object object) throws Exception {

        System.out.println("OneInterceptor preHandle");

        return true;
    }

    @Override
    public 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）
     */
    @Override
    public 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）
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object object) throws Exception {

        System.out.println("TwoController preHandle");

        return false;
    }

    @Override
    public 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）
     */
    @Override
    public 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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Spring Boot笔记-拦截器相关（用户权限方面）

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