一、下载Xxl-Job源代码并导入本地并运行

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。

二、添加执行器(Xxl-Job源代码就一个Example，可以复用过来，你也可以选择自己新建项目，新建项目可以在Xxl-Job基础上，也可以放在其它项目中)

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:

logback

%d{HH:mm:ss.SSS} %contextName [%thread] %-5level %logger{36} - %msg%n

${log.path}

${log.path}.%d{yyyy-MM-dd}.zip

%date %level [%thread] %logger{36} [%file : %line] %msg%n

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 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 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 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(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 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 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;

}

}

三、结合Xxl-Job后台系统增加定时任务

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

四、为什么选择Xxl-Job

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)

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