Github地址:
https://github.com/xuxueli/xxl-job

中文文档地址:
https://www.xuxueli.com/xxl-job/

1.使用Idea或Eclipse导入

2.执行sql脚本(红色标记处)

3.运行xxl-job-admin(xxl-job后台管理，主要方便管理各种各样的任务)

注意:在运行之前，需要把2的sql脚本执行完毕，并修改数据库连接池。

正常启动，访问地址为:
http://localhost:8080/xxl-job-admin

效果图，如下所示:

用户名默认为admin
密码为123456

输入后，进入这个界面，如图:

这样就表示Xxl-Job成功运行了。确保运行没问题后，就可以开始下一步。

1.新建一个Maven项目，命名为blog-xxl-job。

2.导入Maven依赖

com.xuxueli xxl-job-core 2.2.0
org.springframework.cloud spring-cloud-starter-netflix-eureka-client
org.springframework.boot spring-boot-starter-web

3.新建application.yml配置文件并添加如下内容

#eureka
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka/

web port

server.port=8081

no web

#spring.main.web-environment=false

log config

logging.config=classpath:logback.xml

xxl-job admin address list, such as "http://address" or "http://address01,http://address02"

xxl.job.admin.addresses=http://127.0.0.1:8080/xxl-job-admin

xxl-job, access token

xxl.job.accessToken=

xxl-job executor appname

xxl.job.executor.appname=blog-xxl-job-executor

xxl-job executor registry-address: default use address to registry , otherwise use ip:port if address is null

xxl.job.executor.address=

xxl-job executor server-info

xxl.job.executor.ip=
xxl.job.executor.port=9999

xxl-job executor log-path

xxl.job.executor.logpath=/data/applogs/xxl-job/jobhandler

xxl-job executor log-retention-days

xxl.job.executor.logretentiondays=30

可以不用eureka，这里我的项目中用到eureka所以增加该配置。

增加logback.xml配置:

<contextName>logback</contextName>  
<property name="log.path" value="/data/applogs/xxl-job/xxl-job-executor-sample-springboot.log"/>

<appender name="console" class="ch.qos.logback.core.ConsoleAppender">  
    <encoder>  
        <pattern>%d{HH:mm:ss.SSS} %contextName \[%thread\] %-5level %logger{36} - %msg%n</pattern>  
    </encoder>  
</appender>

<appender name="file" class="ch.qos.logback.core.rolling.RollingFileAppender">  
    <file>${log.path}</file>  
    <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">  
        <fileNamePattern>${log.path}.%d{yyyy-MM-dd}.zip</fileNamePattern>  
    </rollingPolicy>  
    <encoder>  
        <pattern>%date %level \[%thread\] %logger{36} \[%file : %line\] %msg%n  
        </pattern>  
    </encoder>  
</appender>

<root level="info">  
    <appender-ref ref="console"/>  
    <appender-ref ref="file"/>  
</root>

4.编写Application类

package com.springcloud.blog.job.execute;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;

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

}

5.编写Job执行器

package com.springcloud.blog.job.execute.jobhandler;

import com.xxl.job.core.biz.model.ReturnT;
import com.xxl.job.core.handler.IJobHandler;
import com.xxl.job.core.handler.annotation.XxlJob;
import com.xxl.job.core.log.XxlJobLogger;
import com.xxl.job.core.util.ShardingUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Arrays;
import java.util.concurrent.TimeUnit;

/**
* XxlJob开发示例（Bean模式）
*

* 开发步骤：
* 1、在Spring Bean实例中，开发Job方法，方式格式要求为 "public ReturnT execute(String param)"
* 2、为Job方法添加注解 "@XxlJob(value="自定义jobhandler名称", init = "JobHandler初始化方法", destroy = "JobHandler销毁方法")"，注解value值对应的是调度中心新建任务的JobHandler属性的值。
* 3、执行日志：需要通过 "XxlJobLogger.log" 打印执行日志；
*
* @author xuxueli 2019-12-11 21:52:51
*/
@Component
public class SampleXxlJob {
private static Logger logger = LoggerFactory.getLogger(SampleXxlJob.class);

/\*\*  
 \* 1、简单任务示例（Bean模式）  
 \*/  
@XxlJob("demoJobHandler")  
public ReturnT<String> demoJobHandler(String param) throws Exception {  
    XxlJobLogger.log("XXL-JOB, Hello World.");

    for (int i = 0; i < 5; i++) {  
        XxlJobLogger.log("beat at:" + i);  
        TimeUnit.SECONDS.sleep(2);  
    }  
    return ReturnT.SUCCESS;  
}

/\*\*  
 \* 2、分片广播任务  
 \*/  
@XxlJob("shardingJobHandler")  
public ReturnT<String> shardingJobHandler(String param) throws Exception {

    // 分片参数  
    ShardingUtil.ShardingVO shardingVO = ShardingUtil.getShardingVo();  
    XxlJobLogger.log("分片参数：当前分片序号 = {}, 总分片数 = {}", shardingVO.getIndex(), shardingVO.getTotal());

    // 业务逻辑  
    for (int i = 0; i < shardingVO.getTotal(); i++) {  
        if (i == shardingVO.getIndex()) {  
            XxlJobLogger.log("第 {} 片, 命中分片开始处理", i);  
        } else {  
            XxlJobLogger.log("第 {} 片, 忽略", i);  
        }  
    }

    return ReturnT.SUCCESS;  
}

/\*\*  
 \* 3、命令行任务  
 \*/  
@XxlJob("commandJobHandler")  
public ReturnT<String> commandJobHandler(String param) throws Exception {  
    String command = param;  
    int exitValue = -1;

    BufferedReader bufferedReader = null;  
    try {  
        // command process  
        Process process = Runtime.getRuntime().exec(command);  
        BufferedInputStream bufferedInputStream = new BufferedInputStream(process.getInputStream());  
        bufferedReader = new BufferedReader(new InputStreamReader(bufferedInputStream));

        // command log  
        String line;  
        while ((line = bufferedReader.readLine()) != null) {  
            XxlJobLogger.log(line);  
        }

        // command exit  
        process.waitFor();  
        exitValue = process.exitValue();  
    } catch (Exception e) {  
        XxlJobLogger.log(e);  
    } finally {  
        if (bufferedReader != null) {  
            bufferedReader.close();  
        }  
    }

    if (exitValue == 0) {  
        return IJobHandler.SUCCESS;  
    } else {  
        return new ReturnT<String>(IJobHandler.FAIL.getCode(), "command exit value(" + exitValue + ") is failed");  
    }  
}

/\*\*  
 \* 4、跨平台Http任务  
 \* 参数示例：  
 \* "url: http://www.baidu.com\\n" +  
 \* "method: get\\n" +  
 \* "data: content\\n";  
 \*/  
@XxlJob("httpJobHandler")  
public ReturnT<String> httpJobHandler(String param) throws Exception {

    // param parse  
    if (param == null || param.trim().length() == 0) {  
        XxlJobLogger.log("param\[" + param + "\] invalid.");  
        return ReturnT.FAIL;  
    }  
    String\[\] httpParams = param.split("\\n");  
    String url = null;  
    String method = null;  
    String data = null;  
    for (String httpParam : httpParams) {  
        if (httpParam.startsWith("url:")) {  
            url = httpParam.substring(httpParam.indexOf("url:") + 4).trim();  
        }  
        if (httpParam.startsWith("method:")) {  
            method = httpParam.substring(httpParam.indexOf("method:") + 7).trim().toUpperCase();  
        }  
        if (httpParam.startsWith("data:")) {  
            data = httpParam.substring(httpParam.indexOf("data:") + 5).trim();  
        }  
    }

    // param valid  
    if (url == null || url.trim().length() == 0) {  
        XxlJobLogger.log("url\[" + url + "\] invalid.");  
        return ReturnT.FAIL;  
    }  
    if (method == null || !Arrays.asList("GET", "POST").contains(method)) {  
        XxlJobLogger.log("method\[" + method + "\] invalid.");  
        return ReturnT.FAIL;  
    }

    // request  
    HttpURLConnection connection = null;  
    BufferedReader bufferedReader = null;  
    try {  
        // connection  
        URL realUrl = new URL(url);  
        connection = (HttpURLConnection) realUrl.openConnection();

        // connection setting  
        connection.setRequestMethod(method);  
        connection.setDoOutput(true);  
        connection.setDoInput(true);  
        connection.setUseCaches(false);  
        connection.setReadTimeout(5 \* 1000);  
        connection.setConnectTimeout(3 \* 1000);  
        connection.setRequestProperty("connection", "Keep-Alive");  
        connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");  
        connection.setRequestProperty("Accept-Charset", "application/json;charset=UTF-8");

        // do connection  
        connection.connect();

        // data  
        if (data != null && data.trim().length() > 0) {  
            DataOutputStream dataOutputStream = new DataOutputStream(connection.getOutputStream());  
            dataOutputStream.write(data.getBytes("UTF-8"));  
            dataOutputStream.flush();  
            dataOutputStream.close();  
        }

        // valid StatusCode  
        int statusCode = connection.getResponseCode();  
        if (statusCode != 200) {  
            throw new RuntimeException("Http Request StatusCode(" + statusCode + ") Invalid.");  
        }

        // result  
        bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));  
        StringBuilder result = new StringBuilder();  
        String line;  
        while ((line = bufferedReader.readLine()) != null) {  
            result.append(line);  
        }  
        String responseMsg = result.toString();

        XxlJobLogger.log(responseMsg);  
        return ReturnT.SUCCESS;  
    } catch (Exception e) {  
        XxlJobLogger.log(e);  
        return ReturnT.FAIL;  
    } finally {  
        try {  
            if (bufferedReader != null) {  
                bufferedReader.close();  
            }  
            if (connection != null) {  
                connection.disconnect();  
            }  
        } catch (Exception e2) {  
            XxlJobLogger.log(e2);  
        }  
    }

}

/\*\*  
 \* 5、生命周期任务示例：任务初始化与销毁时，支持自定义相关逻辑；  
 \*/  
@XxlJob(value = "demoJobHandler2", init = "init", destroy = "destroy")  
public ReturnT<String> demoJobHandler2(String param) throws Exception {  
    XxlJobLogger.log("XXL-JOB, Hello World.");  
    return ReturnT.SUCCESS;  
}

public void init() {  
    logger.info("init");  
}

public void destroy() {  
    logger.info("destory");  
}

}

6.增加XxlJobConfig配置类

package com.springcloud.blog.job.execute.core.config;

import com.xxl.job.core.executor.impl.XxlJobSpringExecutor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class XxlJobConfig {
private Logger logger = LoggerFactory.getLogger(XxlJobConfig.class);

@Value("${xxl.job.admin.addresses}")  
private String adminAddresses;

@Value("${xxl.job.accessToken}")  
private String accessToken;

@Value("${xxl.job.executor.appname}")  
private String appname;

@Value("${xxl.job.executor.address}")  
private String address;

@Value("${xxl.job.executor.ip}")  
private String ip;

@Value("${xxl.job.executor.port}")  
private int port;

@Value("${xxl.job.executor.logpath}")  
private String logPath;

@Value("${xxl.job.executor.logretentiondays}")  
private int logRetentionDays;

@Bean  
public XxlJobSpringExecutor xxlJobExecutor() {  
    logger.info(">>>>>>>>>>> xxl-job config init.");  
    XxlJobSpringExecutor xxlJobSpringExecutor = new XxlJobSpringExecutor();  
    xxlJobSpringExecutor.setAdminAddresses(adminAddresses);  
    xxlJobSpringExecutor.setAppname(appname);  
    xxlJobSpringExecutor.setAddress(address);  
    xxlJobSpringExecutor.setIp(ip);  
    xxlJobSpringExecutor.setPort(port);  
    xxlJobSpringExecutor.setAccessToken(accessToken);  
    xxlJobSpringExecutor.setLogPath(logPath);  
    xxlJobSpringExecutor.setLogRetentionDays(logRetentionDays);

    return xxlJobSpringExecutor;  
}

}

1.配置执行器

执行器地址为(与blog-xxl-job中application.yml配置文件里的执行器地址需要保持一致，否则会注册失败，导致任务执行不了:

2.添加任务

3.任务执行成功的标志

当初选择使用Xxl-Job有这么几个原因:
第一、团队里有好几个人上一家公司或上上家公司用过。
第二、这个生态比较丰富且开源。
第三、确实非常容易上手且轻量化(轻量化的一个体现就是非侵入式)