SpringCloud(第 048 篇)使用AOP統一處理Web請求日誌

SpringCloud(第 048 篇)使用AOP統一處理Web請求日誌

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一、大致介紹

1、AOP是Spring框架中的一個重要內容,它通過對既有程序定義一個切入點,然後在其前後切入不同的執行內容,比如常見的有:打開數據庫連接/關閉數據庫連接、打開事務/關閉事務、記錄日誌等;
2、基於AOP不會破壞原來程序邏輯,因此它可以很好的對業務邏輯的各個部分進行隔離,從而使得業務邏輯各部分之間的耦合度降低,提高程序的可重用性,同時提高了開發的效率。

二、實現步驟

2.1 添加 maven 引用包

<?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>

    <artifactId>springms-aop-weblog</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>com.springms.cloud</groupId>
        <artifactId>springms-spring-cloud</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>

    <dependencies>
        <!-- 訪問數據庫模塊 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <!-- web模塊 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- h2數據庫模塊 -->
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- 支持Apache Solr搜索平臺,包括spring-data-solr -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-solr</artifactId>
        </dependency>
    </dependencies>

</project>

2.2 添加應用配置文件(springms-aop-weblog\src\main\resources\application.yml)

server:
  port: 8350
spring:
  application:
    name: springms-aop-weblog  #全部小寫
  jpa:
    generate-ddl: false
    show-sql: true
    hibernate:
      ddl-auto: none
  datasource:
    platform: h2
    schema: classpath:schema.sql
    data: classpath:data.sql

2.3 添加 H2 數據庫腳本(springms-aop-weblog\src\main\resources\schema.sql)

drop table user if exists;

CREATE TABLE USER(
    id BIGINT GENERATED by default as identity,
    username VARCHAR(40),
    name VARCHAR(20),
    age int(3),
    balance DECIMAL(10, 2),
    PRIMARY KEY(id)
);

2.4 插入 H2 數據庫一些初始化數據(springms-aop-weblog\src\main\resources\data.sql)

INSERT into user (id, username, name, age, balance) values (1, 'user1', '張三', 20, 100.00);
INSERT into user (id, username, name, age, balance) values (2, 'user2', '李四', 22, 100.00);
INSERT into user (id, username, name, age, balance) values (3, 'user3', '王五', 24, 100.00);
INSERT into user (id, username, name, age, balance) values (4, 'user4', '趙六', 26, 100.00);
INSERT into user (id, username, name, age, balance) values (5, 'user5', '李逵', 27, 100.00);
INSERT into user (id, username, name, age, balance) values (6, 'user6', '張遠', 10, 100.00);
INSERT into user (id, username, name, age, balance) values (7, 'user7', '迪拜', 60, 100.00);
INSERT into user (id, username, name, age, balance) values (8, 'user8', '哈士奇', 40, 100.00);
INSERT into user (id, username, name, age, balance) values (9, 'user9', '關羽', 30, 100.00);

2.5 添加訪問底層數據模型的DAO接口(springms-aop-weblog\src\main\java\com\springms\cloud\repository\UserRepository.java)

package com.springms.cloud.repository;

import com.springms.cloud.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends JpaRepository<User, Long> {

}

2.6 添加實體用戶類User(springms-aop-weblog\src\main\java\com\springms\cloud\entity\User.java)

package com.springms.cloud.entity;

import java.math.BigDecimal;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class User {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  private Long id;

  @Column
  private String username;

  @Column
  private String name;

  @Column
  private Short age;

  @Column
  private BigDecimal balance;

  public Long getId() {
    return this.id;
  }

  public void setId(Long id) {
    this.id = id;
  }

  public String getUsername() {
    return this.username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getName() {
    return this.name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Short getAge() {
    return this.age;
  }

  public void setAge(Short age) {
    this.age = age;
  }

  public BigDecimal getBalance() {
    return this.balance;
  }

  public void setBalance(BigDecimal balance) {
    this.balance = balance;
  }
}

2.7 添加Web層日誌切面@Order(1)(springms-aop-weblog\src\main\java\com\springms\cloud\controller\UserController.java)

package com.springms.cloud.aop;

import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;

/****************************************************************************************
 實現AOP的切面主要有以下幾個要素:

 使用@Aspect註解將一個java類定義爲切面類
 使用@Pointcut定義一個切入點,可以是一個規則表達式,比如下例中某個package下的所有函數,也可以是一個註解等。
 根據需要在切入點不同位置的切入內容
 使用@Before在切入點開始處切入內容
 使用@After在切入點結尾處切入內容
 使用@AfterReturning在切入點return內容之後切入內容(可以用來對處理返回值做一些加工處理)
 使用@Around在切入點前後切入內容,並自己控制何時執行切入點自身的內容
 使用@AfterThrowing用來處理當切入內容部分拋出異常之後的處理邏輯
 使用@Order(i)註解來標識切面的優先級。i的值越小,優先級越高
 ****************************************************************************************/


/****************************************************************************************
 執行日誌順序:

 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) URL : http://localhost:8350/simple/1
 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) HTTP_METHOD : GET
 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) IP : 127.0.0.1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) CLASS_METHOD : com.springms.cloud.controller.SimpleProviderUserAopWebLogController.findById
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) ARGS : [1]
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) URL : http://localhost:8350/simple/1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) HTTP_METHOD : GET
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) IP : 127.0.0.1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) CLASS_METHOD : com.springms.cloud.controller.SimpleProviderUserAopWebLogController.findById
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) ARGS : [1]
 Hibernate: select user0_.id as id1_0_0_, user0_.age as age2_0_0_, user0_.balance as balance3_0_0_, user0_.name as name4_0_0_, user0_.username as username5_0_0_ from user user0_ where user0_.id=?
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doAfterReturning) RESPONSE : User@1249202
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doAfterReturning) SPEND TIME : 42
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doAfterReturning) RESPONSE : User@1249202
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doAfterReturning) SPEND TIME : 43

 總結:doBefore 方法先從優先級到低優先級依次執行完,然後 doAfterReturning 方法從低優先級到高優先級依次執行完;也就是進入從高到低,出來從低到高;
 ****************************************************************************************/


/**
 * Web層日誌切面。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/10/19
 *
 */
@Aspect
@Order(1)
@Component
public class WebLogHeadAspect {


    // private static final org.slf4j.Logger logger = LoggerFactory.getLogger(PreZuulFilter.class);

    private Logger logger = Logger.getLogger(getClass());

    ThreadLocal<Long> startTime = new ThreadLocal<>();

    private static final String PRE_TAG = "(Order(1))************** ";

    @Pointcut("execution(public * com.springms.cloud.controller..*.*(..))")
    public void webLog(){}

    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        startTime.set(System.currentTimeMillis());

        // 接收到請求,記錄請求內容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        // 記錄下請求內容
        logger.info(PRE_TAG + "(doBefore) URL : " + request.getRequestURL().toString());
        logger.info(PRE_TAG + "(doBefore) HTTP_METHOD : " + request.getMethod());
        logger.info(PRE_TAG + "(doBefore) IP : " + request.getRemoteAddr());
        logger.info(PRE_TAG + "(doBefore) CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        logger.info(PRE_TAG + "(doBefore) ARGS : " + Arrays.toString(joinPoint.getArgs()));

    }

    @AfterReturning(returning = "ret", pointcut = "webLog()")
    public void doAfterReturning(Object ret) throws Throwable {
        // 處理完請求,返回內容
        logger.info(PRE_TAG + "(doAfterReturning) RESPONSE : " + ret);
        logger.info(PRE_TAG + "(doAfterReturning) SPEND TIME : " + (System.currentTimeMillis() - startTime.get()));
    }
}

2.8 添加Web層日誌切面@Order(5)(springms-aop-weblog\src\main\java\com\springms\cloud\controller\UserController.java)

package com.springms.cloud.aop;

import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.util.Arrays;

/****************************************************************************************
 實現AOP的切面主要有以下幾個要素:

 使用@Aspect註解將一個java類定義爲切面類
 使用@Pointcut定義一個切入點,可以是一個規則表達式,比如下例中某個package下的所有函數,也可以是一個註解等。
 根據需要在切入點不同位置的切入內容
 使用@Before在切入點開始處切入內容
 使用@After在切入點結尾處切入內容
 使用@AfterReturning在切入點return內容之後切入內容(可以用來對處理返回值做一些加工處理)
 使用@Around在切入點前後切入內容,並自己控制何時執行切入點自身的內容
 使用@AfterThrowing用來處理當切入內容部分拋出異常之後的處理邏輯
 使用@Order(i)註解來標識切面的優先級。i的值越小,優先級越高
 ****************************************************************************************/

/****************************************************************************************
 執行日誌順序:

 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) URL : http://localhost:8350/simple/1
 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) HTTP_METHOD : GET
 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) IP : 127.0.0.1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) CLASS_METHOD : com.springms.cloud.controller.SimpleProviderUserAopWebLogController.findById
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) ARGS : [1]
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) URL : http://localhost:8350/simple/1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) HTTP_METHOD : GET
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) IP : 127.0.0.1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) CLASS_METHOD : com.springms.cloud.controller.SimpleProviderUserAopWebLogController.findById
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) ARGS : [1]
 Hibernate: select user0_.id as id1_0_0_, user0_.age as age2_0_0_, user0_.balance as balance3_0_0_, user0_.name as name4_0_0_, user0_.username as username5_0_0_ from user user0_ where user0_.id=?
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doAfterReturning) RESPONSE : User@1249202
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doAfterReturning) SPEND TIME : 42
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doAfterReturning) RESPONSE : User@1249202
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doAfterReturning) SPEND TIME : 43

 總結:doBefore 方法先從優先級到低優先級依次執行完,然後 doAfterReturning 方法從低優先級到高優先級依次執行完;也就是進入從高到低,出來從低到高;
 ****************************************************************************************/


/**
 * Web層日誌切面。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/10/19
 *
 */
@Aspect
@Order(5)
@Component
public class WebLogFiveAspect {


    // private static final org.slf4j.Logger logger = LoggerFactory.getLogger(PreZuulFilter.class);

    private Logger logger = Logger.getLogger(getClass());

    ThreadLocal<Long> startTime = new ThreadLocal<>();

    private static final String PRE_TAG = "(Order(5))============== ";

    @Pointcut("execution(public * com.springms.cloud.controller..*.*(..))")
    public void webLog(){}

    @Before("webLog()")
    public void doBefore(JoinPoint joinPoint) throws Throwable {
        startTime.set(System.currentTimeMillis());

        // 接收到請求,記錄請求內容
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        // 記錄下請求內容
        logger.info(PRE_TAG + "(doBefore) URL : " + request.getRequestURL().toString());
        logger.info(PRE_TAG + "(doBefore) HTTP_METHOD : " + request.getMethod());
        logger.info(PRE_TAG + "(doBefore) IP : " + request.getRemoteAddr());
        logger.info(PRE_TAG + "(doBefore) CLASS_METHOD : " + joinPoint.getSignature().getDeclaringTypeName() + "." + joinPoint.getSignature().getName());
        logger.info(PRE_TAG + "(doBefore) ARGS : " + Arrays.toString(joinPoint.getArgs()));

    }

    @AfterReturning(returning = "ret", pointcut = "webLog()")
    public void doAfterReturning(Object ret) throws Throwable {
        // 處理完請求,返回內容
        logger.info(PRE_TAG + "(doAfterReturning) RESPONSE : " + ret);
        logger.info(PRE_TAG + "(doAfterReturning) SPEND TIME : " + (System.currentTimeMillis() - startTime.get()));
    }
}

2.9 添加用戶Web訪問層Controller(springms-aop-weblog\src\main\java\com\springms\cloud\controller\UserController.java)

package com.springms.cloud.controller;

import com.springms.cloud.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

import com.springms.cloud.repository.UserRepository;

/**
 * 用戶微服務Controller。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/10/19
 *
 */
@RestController
public class AopWebLogController {

    @Autowired
    private UserRepository userRepository;

    @GetMapping("/simple/{id}")
    public User findById(@PathVariable Long id) {
        return this.userRepository.findOne(id);
    }
}

2.10 添加微服務啓動類(springms-aop-weblog\src\main\java\com\springms\cloud\MsAopWebLogApplication.java)

package com.springms.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * 使用AOP統一處理Web請求日誌。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/10/19
 *
 */
@SpringBootApplication
public class MsAopWebLogApplication {

    public static void main(String[] args) {
        SpringApplication.run(MsAopWebLogApplication.class, args);
        System.out.println("【【【【【【 AopWebLog微服務 】】】】】】已啓動.");
    }
}

三、測試

/****************************************************************************************
 一、簡單用戶微服務類(實現AOP的切面打印日誌):

 1、啓動 springms-aop-weblog 模塊服務,啓動1個端口;
 2、在瀏覽器輸入地址 http://localhost:8350/simple/1 可以看到日誌信息成功的被打印出來到控制檯上。;

 執行日誌順序:

 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) URL : http://localhost:8350/simple/1
 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) HTTP_METHOD : GET
 2017-10-19 20:22:35.810  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) IP : 127.0.0.1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) CLASS_METHOD : com.springms.cloud.controller.SimpleProviderUserAopWebLogController.findById
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doBefore) ARGS : [1]
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) URL : http://localhost:8350/simple/1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) HTTP_METHOD : GET
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) IP : 127.0.0.1
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) CLASS_METHOD : com.springms.cloud.controller.SimpleProviderUserAopWebLogController.findById
 2017-10-19 20:22:35.811  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doBefore) ARGS : [1]
 Hibernate: select user0_.id as id1_0_0_, user0_.age as age2_0_0_, user0_.balance as balance3_0_0_, user0_.name as name4_0_0_, user0_.username as username5_0_0_ from user user0_ where user0_.id=?
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doAfterReturning) RESPONSE : User@1249202
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] com.springms.cloud.aop.WebLogFiveAspect        : (Order(5))============== (doAfterReturning) SPEND TIME : 42
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doAfterReturning) RESPONSE : User@1249202
 2017-10-19 20:22:35.853  INFO 9014 --- [nio-8350-exec-1] WebLogHeadAspect    : (Order(1))************** (doAfterReturning) SPEND TIME : 43

 總結:doBefore 方法先從優先級到低優先級依次執行完,然後 doAfterReturning 方法從低優先級到高優先級依次執行完;也就是進入從高到低,出來從低到高;
 ****************************************************************************************/

四、下載地址

https://gitee.com/ylimhhmily/SpringCloudTutorial.git

SpringCloudTutorial交流QQ羣: 235322432

SpringCloudTutorial交流微信羣: 微信溝通羣二維碼圖片鏈接

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