SpringCloud Hoxton版 + SpringCloud alibaba学习笔记（1）-- 基础入门

港控/mmm° 2022-12-28 00:48 131阅读 0赞

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Cloud组件停更说明  
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### 一、IDEA新建project工作空间 ###

#### 1、New Project ####

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#### 2、聚合总工程名字 ####

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#### 3、Maven选版本 ####

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#### 4、工程名字 ####

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#### 5、字符编码 ####

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#### 6、注解生效激活 ####

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#### 7、java编译版本选8 ####

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#### 8、File Type过滤（隐藏不必要的文件和文件夹） ####

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#### 9、把src文件夹删掉 ####

![在这里插入图片描述][20201212230006305.png]

#### 10、修改父工程pom.xml文件 ####

<?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>
    
      <groupId>com.atguigu.springcloud</groupId>
      <artifactId>cloud2020</artifactId>
      <version>1.0-SNAPSHOT</version>
      <packaging>pom</packaging>
    
    
      
      <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <lombok.version>1.16.18</lombok.version>
        <mysql.version>5.1.47</mysql.version>
        <druid.version>1.1.16</druid.version>
        <mybatis.spring.boot.version>1.3.0</mybatis.spring.boot.version>
      </properties>
    
      
      <dependencyManagement>
        <dependencies>
          
          <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-dependencies</artifactId>
            <version>2.2.2.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
          </dependency>
          
          <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>Hoxton.SR1</version>
            <type>pom</type>
            <scope>import</scope>
          </dependency>
          
          <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-alibaba-dependencies</artifactId>
            <version>2.1.0.RELEASE</version>
            <type>pom</type>
            <scope>import</scope>
          </dependency>
    
          <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${ mysql.version}</version>
          </dependency>
          <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${ druid.version}</version>
          </dependency>
          <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>${ mybatis.spring.boot.version}</version>
          </dependency>
          <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${ junit.version}</version>
          </dependency>
          <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${ log4j.version}</version>
          </dependency>
          <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${ lombok.version}</version>
            <optional>true</optional>
          </dependency>
        </dependencies>
      </dependencyManagement>
    
      <build>
        <plugins>
          <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <configuration>
              <fork>true</fork>
              <addResources>true</addResources>
            </configuration>
          </plugin>
        </plugins>
      </build>
    
    </project>

packaging的方式是pom，说明这个是总的父工程  
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#### 11、Maven中的dependencyManagement和dependencies ####

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#### 12、maven中跳过单元测试 ####

点击之后，test出现横线变灰，跳过单元测试，以便节省时间  
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#### 13、父工程创建完成执行mvn:install将父工程发布到仓库方便子工程继承 ####

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### 二、Rest微服务工程构建 ###

第一个版本结构图  
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### cloud-provider-payment8001微服务提供者支付Module模块 ###

#### 1、父工程右击，新建一个module ####

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archetype可以不用选了  
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![在这里插入图片描述][20201212233021793.png]

#### 2、创建完成后请回到父工程查看pom文件变化 ####

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移出之后  
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#### 3、改payment8001的pom.xml文件 ####

<?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">
        <parent>
            <artifactId>cloud2020</artifactId>
            <groupId>com.atguigu.springcloud</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>cloud-provider-payment8001</artifactId>
    
        <dependencies>
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid-spring-boot-starter</artifactId>
                <version>1.1.10</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-jdbc</artifactId>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-devtools</artifactId>
               <scope>runtime</scope>
                <optional>true</optional>
            </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>
    
        </dependencies>
    
    </project>

#### 4、写YML，在resource下，新建application.yaml ####

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server:
      port: 8001
    
    
    spring:
      application:
        name: cloud-payment-service
      datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: org.gjt.mm.mysql.Driver
        url: jdbc:mysql://localhost:3306/db2020?useUnicode=true&characterEncoding=utf-8&useSSL=false
        username: root
        password: 123456
    
    mybatis:
      mapperLocations: classpath:mapper/*.xml
      type-aliases-package: com.atguigu.springcloud.entities

#### 5、主启动，新建个启动类 ####

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@SpringBootApplication
    public class PaymentMain8001 { 
    
        public static void main(String[] args) { 
            SpringApplication.run(PaymentMain8001.class, args);
        }
    }

#### 6、业务类 ####

##### ①、创建数据库，添加数据 #####

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##### ②、新建实体类 #####

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package com.atguigu.springcloud.entities;
    
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    
    import java.io.Serializable;
    
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class Payment implements Serializable { 
        private Long id;
        private String serial;
    }

##### 注意：这里得装lombok插件（百度） #####

##### 新建Json封装体CommonResult（前端反馈给后端的） #####

package com.atguigu.springcloud.entities;
    
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class CommonResult <T>{ 
    
        private Integer code;
        private String message;
        private T data;
    
        public CommonResult(Integer code,String message){ 
            this(code,message,null);
        }
    }

##### ③、新建dao #####

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package com.atguigu.springcloud.dao;
    
    import com.atguigu.springcloud.entities.Payment;
    import org.apache.ibatis.annotations.Mapper;
    import org.apache.ibatis.annotations.Param;
    
    @Mapper
    public interface PaymentDao { 
        public int create(Payment payment);
        public Payment getPaymentById(@Param("id") Long id);
    }

##### 新建mybatis的映射文件PaymentMapper.xml #####

![在这里插入图片描述][20201213001410857.png]

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    
    <mapper namespace="com.atguigu.springcloud.dao.PaymentDao">
    
        <resultMap id="BaseResultMap" type="com.atguigu.springcloud.entities.Payment">
            <id column="id" property="id" jdbcType="BIGINT"></id>
            <id column="serial" property="serial" jdbcType="VARCHAR"></id>
        </resultMap>
        
        <insert id="create" parameterType="Payment" useGeneratedKeys="true" keyProperty="id">
            insert into payment(serial) values(#{serial});
    
        </insert>
    
        <select id="getPaymentById" parameterType="Long" resultMap="BaseResultMap">
            select * from payment where id=#{id}
        </select>
        
    </mapper>

##### ④、service #####

接口PaymentService

package com.atguigu.springcloud.service;
    
    import com.atguigu.springcloud.entities.Payment;
    import org.apache.ibatis.annotations.Param;
    
    public interface PaymentService { 
    
        public int create(Payment payment); //写
    
        public Payment getPaymentById(@Param("id") Long id);  //读取
    }

实现类PaymentServiceImpl

package com.atguigu.springcloud.service.impl;
    
    import com.atguigu.springcloud.dao.PaymentDao;
    import com.atguigu.springcloud.entities.Payment;
    import com.atguigu.springcloud.service.PaymentService;
    import org.springframework.stereotype.Service;
    
    import javax.annotation.Resource;
    
    @Service
    public class PaymentServiceImpl implements PaymentService { 
    
        @Resource
        private PaymentDao paymentDao;
    
        public int create(Payment payment){ 
            return paymentDao.create(payment);
        }
    
        public Payment getPaymentById( Long id){ 
    
            return paymentDao.getPaymentById(id);
    
        }
    }

##### ⑤、新建controller #####

package com.atguigu.springcloud.controller;
    
    import com.atguigu.springcloud.entities.CommonResult;
    import com.atguigu.springcloud.entities.Payment;
    import com.atguigu.springcloud.service.PaymentService;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.PostMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import javax.annotation.Resource;
    
    @RestController
    @Slf4j
    public class PaymentController { 
    
        @Resource
        private PaymentService paymentService;
    
        @PostMapping(value = "/payment/create")
        public CommonResult create(Payment payment){ 
            int result = paymentService.create(payment);
            log.info("*****插入结果："+result);
            if (result>0){   //成功
                return new CommonResult(200,"插入数据库成功",result);
            }else { 
                return new CommonResult(444,"插入数据库失败",null);
            }
        }
        @GetMapping(value = "/payment/get/{id}")
        public CommonResult getPaymentById(@PathVariable("id") Long id){ 
            Payment payment = paymentService.getPaymentById(id);
            log.info("*****查询结果："+payment);
            if (payment!=null){   //说明有数据，能查询成功
                return new CommonResult(200,"查询成功",payment);
            }else { 
                return new CommonResult(444,"没有对应记录，查询ID："+id,null);
            }
        }
    }

目录结构  
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#### 7、启动PaymentMain8001，进行测试 ####

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插入数据  
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### 三、热部署Devtools ###

#### 1、在子工程pom.xml添加依赖 ####

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
        <optional>true</optional>
    </dependency>

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#### 2、在父工程pom.xml添加配置 ####

<build>
      <plugins>
        <plugin>
          <groupId>org.springframework.boot</groupId>
          <artifactId>spring-boot-maven-plugin</artifactId>
          <configuration>
            <fork>true</fork>
            <addResources>true</addResources>
          </configuration>
        </plugin>
      </plugins>
    </build>

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#### 3、开启自动编译配置 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 39]

#### 4、Update the value of，修改值。 ####

按住快捷键，ctrl+alt+shift+/，弹出弹窗，点击Registry

![在这里插入图片描述][20201213164321580.png]  
下面两个勾住即可  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 40]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 41]

#### 5、重启IDEA ####

重启之后，运行Springboot主类，随便修改java类，稍等片刻，看看控制台有没有日志打出，如果有日志打印出来，就说明修改成功了。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 42]

### 四、cloud-consumer-order80微服务消费者订单Module模块 ###

#### 1、建工程，跟cloud-provider-payment8001步骤一样 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 43]

#### 2、改cloud-consumer-order80的pom.xml文件 ####

#### 3、写YML，在resource下，新建application.yaml ####

server:
      port: 80

#### 4、新建主启动 ####

package com.atguigu.springcloud;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication
    public class OrderMain80 { 
        public static void main(String[] args) { 
            SpringApplication.run(OrderMain80.class,args);
        }
    
    }

#### 5、创建entities ####

(将cloud-provider-payment8001工程下的entities包下的两个实体类复制过来)

#### 6、不同服务之间的调用–RestTemplate ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 44]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 45]

#### 7、编写config配置类 ####

package com.atguigu.springcloud.config;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.client.RestTemplate;
    
    @Configuration
    public class ApplicationContextConfig { 
    
        @Bean
        public RestTemplate getRestTemplate(){ 
            return new RestTemplate();
        }
    
    }

#### 8、创建controller ####

package com.atguigu.springcloud.controller;
    
    import com.atguigu.springcloud.entities.CommonResult;
    import com.atguigu.springcloud.entities.Payment;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RestController;
    import org.springframework.web.client.RestTemplate;
    
    import javax.annotation.Resource;
    
    @RestController
    @Slf4j
    public class OrderController { 
    
        public static final String PAYMENT_URL = "http://localhost:8001";
    
        @Resource
        private RestTemplate restTemplate;
    
        @GetMapping("/consumer/payment/create")
        public CommonResult<Payment>   create(Payment payment){ 
            return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);  //写操作
        }
    
        @GetMapping("/consumer/payment/get/{id}")
        public CommonResult<Payment> getPayment(@PathVariable("id") Long id){ 
            return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
        }
    }

#### 9、测试 ####

先启动cloud-provider-payment8001  
再启动cloud-consumer-order80  
测试：http://localhost/consumer/payment/get/2  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 46]  
http://localhost/consumer/payment/create?serial=12222  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 47]

#### 10、补充注解 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 48]  
目录结构图  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 49]

### 五、工程重构 ###

#### 1、新建module，把共同的部分都放这里 ####

名字叫cloud-api-commons  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 50]

#### 2、改cloud-api-commons的pom.xml文件 ####

#### 3、创建entities ####

(将cloud-provider-payment8001工程下的entities包下的两个实体类复制过来)

#### 4、maven命令clean install ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 51]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 52]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 53]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V4b2R1czM_size_16_color_FFFFFF_t_70 54]

#### 5、删除entity文件 ####

删除各自的原先有过的entities文件夹，cloud-provider-payment8001，cloud-consumer-order80工程里的entities文件夹都要进行删除

#### 6、在两个工程的pom.xml引入api通用包 ####

<dependency>
         <groupId>com.atguigu.springcloud</groupId>
         <artifactId>cloud-api-commons</artifactId>
         <version>${project.version}</version>
     </dependency>

#### 7、启动两个工程，测试查询和插入是否成功 ####

### 周阳老师代码 ###

[https://github.com/zzyybs/atguigu\_spirngcloud2020][https_github.com_zzyybs_atguigu_spirngcloud2020]

### [SpringCloud思维导图下载][SpringCloud] ###

## 下一篇：[SpringCloud Hoxton版 + SpringCloud alibaba学习笔记（2）-- 服务注册与发现][SpringCloud Hoxton_ _ SpringCloud alibaba_2_--] ##

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[https_github.com_zzyybs_atguigu_spirngcloud2020]: https://github.com/zzyybs/atguigu_spirngcloud2020
[SpringCloud]: http://www.xuluowuhen.com/download-files-spring-cloud
[SpringCloud Hoxton_ _ SpringCloud alibaba_2_--]: https://blog.csdn.net/exodus3/article/details/111186774