layout: post

手动搭建springboot

subtitle: 手动搭建springboot date: 2020-05-16 author: BY header-img: img/post-bg-kuaidi.jpg catalog: true tags: - java - springboot

手动搭建springboot

注意: 只要是命令工具请不要放到exfat或者fat分区上,请使用apfs或者hfs+等mac自带分区上,不然会出现不可预料的错误

安装 jdk ,1.8以上

# 下载地址,我使用的是zulu的: https://cn.azul.com/downloads/zulu-community/?architecture=x86-64-bit&package=jdk
# 配置到全局变量环境,查看版本
java -version

安装 maven

# 下载地址: https://maven.apache.org/download.cgi
wget https://mirrors.tuna.tsinghua.edu.cn/apache/maven/maven-3/3.9.4/binaries/apache-maven-3.9.4-bin.zip
# 配置到全局变量环境,查看版本
mvn -v

# 阿里云镜像
# 修改maven文件夹文件: apache-maven-3.6.3\conf\settings.xml,mirrors里面增加mirror
# 或者(linux)复制文件到home目录: cp apache-maven-3.6.3/conf/settings.xml ~/.m2/settings.xml
  <mirrors>
    <mirror>
      <id>nexus-aliyun</id>
      <mirrorOf>central</mirrorOf>
      <name>Nexus aliyun</name>
      <url>http://maven.aliyun.com/nexus/content/groups/public</url>
    </mirror>
  </mirrors>

创建项目官方的在线生成工具,idea就是使用的这个,可以参考https://start.spring.io/

# 项目版本[2.3.0.RELEASE]/工作文件夹[f:\spring]
# spring-boot发布版本: https://github.com/spring-projects/spring-boot/releases

创建一个工程目录,在此目录新建文件: pom.xml

# 可以通过spring cli创建项目
spring init --dependencies=web --build=maven my-project

<?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.example</groupId>
  <artifactId>myproject</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <!-- spring boot -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.0.RELEASE</version>
  </parent>
  <!-- 依赖 -->
  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
  </dependencies>

</project>

创建默认文件

# mkdir -p src\main\java\com\example
# 入口文件: touch Home.java
package com.example;

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;

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

}


# mkdir -p src\main\java\com\example\controller
# 控制器: touch HelloController.java
package com.example.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloController {

  @RequestMapping("/")
  @ResponseBody
  String index() {
    return "Hello World!";
  }

  @RequestMapping("/name")
  @ResponseBody
  String name() {
    return "Hello name!";
  }

}

# 访问 http://127.0.0.1:8080 http://127.0.0.1:8080/name 即可

运行

# 查看jar包的间接依赖: mvn dependency:tree
# 运行
mvn spring-boot:run
# 访问 http://127.0.0.1:8080/

开发工具 vscode

# 安装扩展
Java IDE Pack
vscjava.vscode-java-pack
# 包含了:
Java Extension Pack 扩展包
Spring Boot Extension Pack 扩展包

# 安装完成之后,进入插件设置,设置java_home等:

  "concourse.ls.java.home": "D:/jdk1.8.0_45",
  "spring-boot.ls.java.home": "D:/jdk1.8.0_45",
  "cloudfoundry-manifest.ls.java.home": "D:/jdk1.8.0_45",
  "maven.executable.path": "F:\\apache-maven-3.6.3\\bin\\mvn.cmd",
  "java.configuration.maven.userSettings": "F:\\apache-maven-3.6.3\\conf\\settings.xml",
  "maven.executable.preferMavenWrapper": false,

# 首次安装,请等待服务器初始化
57% Starting Java Language Server ...

构建一个可执行的 Jar 包

增加依赖 build, 原文如下:

<?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.example</groupId>
  <artifactId>myproject</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <!-- spring boot -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.0.RELEASE</version>
  </parent>
  <!-- 依赖 -->
  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
  </dependencies>
  <!-- 构建 -->
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

</project>

执行命令

# 生成
mvn package
# [INFO] Building jar: F:\spring\target\myproject-0.0.1-SNAPSHOT.jar

# 运行
java -jar F:\spring\target\myproject-0.0.1-SNAPSHOT.jar

支持热重载的原文

<?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.example</groupId>
  <artifactId>myproject</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <!-- spring boot -->
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.3.0.RELEASE</version>
  </parent>
  <!-- sourceEncoding -->
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
  </properties>
  <!-- web -->
  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- test -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
    <!-- 热更新 -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <optional>true</optional>
    </dependency>
  </dependencies>
  <!-- 构建 -->
  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

</project>

Swagger文档使用openapi3的注解语法

        <!-- swaager: spring-boot2.4+openapi3使用这个版本 -->
        <dependency>
            <groupId>com.github.xiaoymin</groupId>
            <artifactId>knife4j-openapi3-spring-boot-starter</artifactId>
            <version>4.1.0</version>
        </dependency>

redis

        <!-- redis -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

# src/main/resources/application.yml
spring:
  redis:
    host: 127.0.0.1
    port: 6379

队列, 对应版本的文档 4.13.2. AMQ

<!-- 消息队列 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-amqp</artifactId>
        </dependency>
# src/main/resources/application.yml
spring:
  rabbitmq:
    host: 172.17.0.3
    port: 5672
    username: user
    password: password
    vhost: /

package com.example.service;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.CustomExchange;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitAdmin;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class RabbitMQConfig {

    @Autowired
    private ConnectionFactory connectionFactory;

    @Bean
    public RabbitAdmin rabbitAdmin() {
        return new RabbitAdmin(connectionFactory);
    }

    @Bean
    public CustomExchange delayedExchange() {
        // 创建一个自定义交换机，类型为"x-delayed-message"
        // https://github.com/rabbitmq/rabbitmq-delayed-message-exchange
        return new CustomExchange("delayed_exchange", "x-delayed-message", true, false,
                // 设置延迟交换机的参数，指定真正的交换机类型和其他参数
                // 这里示例指定真正的交换机类型为"direct"
                // 其他参数可以根据需要进行设置
                // 更多参数设置请参考插件文档
                java.util.Collections.singletonMap("x-delayed-type", "direct"));
    }

    /**
     * 创建队列
     * @return
     */
    @Bean
    public Queue myQueue() {
        return new Queue("msg");
    }

    @Bean
    public Binding binding() {
        return BindingBuilder.bind(myQueue())
                .to(delayedExchange())
                .with("yourRoutingKey")
                .noargs();
    }

}



package com.example.service;

import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageBuilder;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class DelayedTask {
    @Autowired
    private RabbitTemplate rabbitTemplate;

    public void push() {
        // 执行延时任务逻辑
        // 将任务消息发送到消息队列，并设置延时时间
        Message delayedMessage = MessageBuilder.withBody("1".getBytes())
                .setHeader("x-delay", 5000)
                .build();

        rabbitTemplate.send("delayed_exchange", "yourRoutingKey", delayedMessage);
    }

}


package com.example.service;

import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;

@Component
public class DelayedTaskListener {
    @RabbitListener(queues = "msg")
    public void processDelayedTask(String message) {
        // 延时任务到达时执行的操作
        System.out.println("Delayed task executed: " + message);
    }
}

docker上线

# build>plugins依赖里面增加
            <!-- 打jar包 -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

# docker build --pull -t demo1 .
# docker run -itd --network=host --name=demo1 f0f97a246cae
FROM adoptopenjdk/openjdk8
RUN mkdir /work
COPY target/myproject-0.0.1-SNAPSHOT.jar /work

WORKDIR /work
EXPOSE 8081

CMD ["java", "-jar", "/work/myproject-0.0.1-SNAPSHOT.jar"]
# 自定义配置文件,可以通过参数使用正式环境的配置文件
# java -jar ./target/myproject-0.0.1-SNAPSHOT.jar --spring.config.name=application --spring.config.location=/xuniji/spring_demo/

mysql连接池数量,可以直接配置即可生效

spring:
  datasource:
    url: jdbc:mysql://www.leng2011.icu:3306/exadmin
    username: root
    password: 112233445566
    # 连接池数量
    hikari:
      maximum-pool-size: 10

# 查看连接数量
SHOW STATUS LIKE 'Threads_connected';