java代码--拦截器的实现_java拦截器实现代码-优快云博客

本文链接：https://blog.youkuaiyun.com/jiayou516/article/details/116743088

这篇博客详细介绍了如何在Java项目中实现拦截器，包括新建工程模块、配置相关依赖、编写配置文件、加密工具类，以及实现登录功能、注册拦截器并测试拦截器的完整流程。内容涵盖Swagger接口文档配置、加密解密工具类的编写，以及登录验证、拦截器功能测试等关键步骤。

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拦截器的实现

1.新建工程模块`interceptor`

准备:数据库数据

CREATE DATABASE admin_bd

USE admin_bd

DROP TABLE IF EXISTS `admin_user`;

CREATE TABLE `admin_user` (
  `admin_user_seq` INT(11) NOT NULL AUTO_INCREMENT,
  `admin_user_no` VARCHAR(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `admin_user_name` VARCHAR(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `admin_user_position` VARCHAR(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `admin_user_phone` VARCHAR(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `admin_user_email` VARCHAR(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `admin_user_password` VARCHAR(200) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `smed_role_info_bd_seq` INT(11) NOT NULL,
  `role_info_name` VARCHAR(20) COLLATE utf8mb4_unicode_ci NOT NULL,
  `admin_user_status_itype` TINYINT(2) NOT NULL,
  `create_by` BIGINT(20) NOT NULL,
  `create_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `update_by` BIGINT(20) DEFAULT NULL,
  `update_time` TIMESTAMP NULL DEFAULT NULL,
  `active_flag` CHAR(1) COLLATE utf8mb4_unicode_ci NOT NULL,
  PRIMARY KEY (`admin_user_seq`),
  KEY `smed_boss_user_bd_ix1` (`admin_user_phone`),
  KEY `smed_boss_user_bd_ix2` (`admin_user_no`) USING BTREE
) ENGINE=INNODB AUTO_INCREMENT=68 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;



INSERT  INTO `admin_user`(`admin_user_no`,`admin_user_name`,`admin_user_position`,`admin_user_phone`,`admin_user_email`,`admin_user_password`,`smed_role_info_bd_seq`,`role_info_name`,
`admin_user_status_itype`,`create_by`,`create_time`,`active_flag`) VALUES ('super','super','super','15177778888','56565@qq.com','9f95c68e7ceff25f65962a24e21b85c1',35,'最新',1,1,NOW(),'y')

2.在`pom.xml`文件中导入项目需要的相关依赖

<?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.demo</groupId>
    <artifactId>interceptor</artifactId>
    <version>1.0-SNAPSHOT</version>

    <!--  统一版本管理-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <!-- jdk版本 -->
    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- web 启动器  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- lombok插件-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--热部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
        </dependency>
        <!-- springboot集成单元测试-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>
        <!-- mybatis启动器-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!--mysql连接器-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <!-- swaggerUi接口文档的以来-->
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.7.0</version>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.7.0</version>
        </dependency>

        <!--springboot集成redis启动器-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>2.0.1.RELEASE</version>
        </dependency>
        <!-- commons包-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <!--json-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.70</version>
        </dependency>
    </dependencies>

</project>

3.编写配置文件`application.yml`

spring.datasource:
  url: jdbc:mysql://127.0.0.1:3306/admin_bd?characterEncoding=utf8&useSSL=false&serverTimezone=GMT%2B8&noAccessToProcedureBodies=true&zeroDateTimeBehavior=convertToNull
  username: root
  password: root
  type: com.zaxxer.hikari.HikariDataSource
  driver-class-name: com.mysql.jdbc.Driver
  hikari:
    connectionTimeout: 30000
    idleTimeout: 600000
    maxLifetime: 1800000
    maximumPoolSize: 50
    minimumIdle: 10
    validationTimeout: 5000
spring.redis:
  database: 0
  host: 127.0.0.1
  port: 6379
  password:
  pool:
    max-active: 8
    max-wait: -1
    max-idle: 8
    min-idle: 0
server:
  port: 10086

4.配置swagger接口文档

配置接口文档主要是为了测试方便,以及模拟项目中在请求头中获取token和userId

package com.demo.interceptor.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.ParameterBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.schema.ModelRef;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.service.Parameter;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.List