做了一个简单的定时任务。
一、依赖
<dependencies> <!-- <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-quartz</artifactId> </dependency> --> <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.2.2</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/druid-spring-boot-starter --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz</artifactId> <version>2.2.3</version> </dependency> <dependency> <groupId>org.quartz-scheduler</groupId> <artifactId>quartz-jobs</artifactId> <version>2.2.3</version> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson --> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.47</version> </dependency> <!-- spring-boot-devtools依赖包 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <optional>true</optional> <scope>true</scope> </dependency> <!-- servlet 依赖. <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <scope>provided</scope> </dependency> --> <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>org.apache.tomcat.embed</groupId> <artifactId>tomcat-embed-jasper</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies>
以上依赖的版本和顺序不要随意变动，否则会出现问题
二、application.yml
spring:
quartz:
#相关属性配置
properties:
org:
quartz:
scheduler:
instanceName: clusteredScheduler
instanceId: AUTO
jobStore:
class: org.quartz.impl.jdbcjobstore.JobStoreTX
driverDelegateClass: org.quartz.impl.jdbcjobstore.PostgreSQLDelegate
tablePrefix: QRTZ_
isClustered: true
clusterCheckinInterval: 10000
useProperties: false
dataSource: quartz
threadPool:
class: org.quartz.simpl.SimpleThreadPool
threadCount: 10
threadPriority: 5
threadsInheritContextClassLoaderOfInitializingThread: true
plugin:
jobInitializer:
class: org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin
fileNames: quartz_jobs.xml
failOnFileNotFound: true
scanInterval: 1000
wrapInUserTransaction: false
#数据库方式
job-store-type: jdbc
#初始化表结构
#jdbc:
#initialize-schema: never
datasource:
druid:
driver-class-name: org.postgresql.Driver
url: jdbc:postgresql://127.0.0.1:5432/quartz
username: admin
password: 123456
jpa:
properties:
hibernate:
temp:
use_jdbc_metadata_defaults: false
ddl-auto: create #ddl-auto:设为update表示每次都不会重新建表
show-sql: true
mvc:
view:
prefix: /WEB-INF/jsp/
suffix: .jsp
http:
encoding:
charset: UTF-8
enabled: true
force: true
mybatis:
mapperLocations: classpath:mapper/*.xml
typeAliasesPackage: tk.mapper.model
#
# application:
# name: quartz-cluster-node-second
server:
port: 8083
servlet:
context-path: /test
#####################################################################################################
# 打印日志
logging:
level:
root: INFO
org.hibernate: INFO
org.hibernate.type.descriptor.sql.BasicBinder: TRACE
org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
com.springms: DEBUG
com.lyw.timers.mapper: DEBUG
#####################################################################################################
###JSP
########################################################
自己根据情况修改下数据库的信息
三、一个初始化的任务
<?xml version="1.0" encoding="UTF-8"?>
<job-scheduling-data
xmlns="http://www.quartz-scheduler.org/xml/JobSchedulingData"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.quartz-scheduler.org/xml/JobSchedulingData http://www.quartz-scheduler.org/xml/job_scheduling_data_2_0.xsd"
version="2.0">
<pre-processing-commands>
<!-- <delete-jobs-in-group>*</delete-jobs-in-group> -->
<delete-triggers-in-group>*</delete-triggers-in-group>
</pre-processing-commands>
<processing-directives>
<overwrite-existing-data>true</overwrite-existing-data>
<ignore-duplicates>false</ignore-duplicates>
</processing-directives>
<schedule>
<job>
<name>PrvdDataJob</name>
<group>DayEnd</group>
<description>timer</description>
<job-class>com.lyw.timers.PrvdDataJob</job-class>
</job>
<trigger>
<cron>
<name>PrvdDataJobTrigger</name>
<group>Trigger_DayEnd</group>
<job-name>PrvdDataJob</job-name>
<job-group>DayEnd</job-group>
<cron-expression>*/3 * * * * ?</cron-expression>
</cron>
</trigger>
</schedule>
</job-scheduling-data>
同放于application.yml。
四、定义一个任务类
@Component("PrvdDataJob")
public class PrvdDataJob implements Job{
static Logger logger = LoggerFactory.getLogger(PrvdDataJob.class);
public PrvdDataJob() {
}
@Override
public void execute(JobExecutionContext context) throws JobExecutionException {
try {
System.out.println(((CronTrigger)context.getTrigger()).getCronExpression());
// System.out.println("我的3秒一次");
} catch (Exception e) {
throw new JobExecutionException("执行PrvdDataJob任务异常",e);
}
}
}
五、一个Service类
@Service
public class TimersService {
@Autowired
private Scheduler scheduler;
@Autowired
private TimerMapper timerMapper;
public String setTimer(TimerVo tvo) throws Exception{
return buildTimer(tvo);
}
/**
* 该方法用于获取到相应的任务，并进行设置
*/
public String buildTimer(TimerVo tvo) throws Exception{
Timer timer = new Timer();
BeanUtils.copyProperties(tvo, timer);
//查询名为triggerName的任务
timer = timerMapper.getCronTrigger(timer);
//记录上一次的expression
timer.setBeforeExpression(timer.getExpression());
String expression = "";
if(tvo.getMonth().length()>0) {
expression = tvo.getSecord()+" "+tvo.getMinute()+" "+tvo.getHour()+" "+tvo.getDay()+" "+tvo.getMonth()+" ?";
}
if(tvo.getMonth().length()<=0 && tvo.getDay().length()>0) {
expression = tvo.getSecord()+" "+tvo.getMinute()+" "+tvo.getHour()+" "+tvo.getDay()+" * ?";
}
if(tvo.getWeek().length()>0) {
expression = tvo.getSecord()+" "+tvo.getMinute()+" "+tvo.getHour()+" ? * "+tvo.getWeek();
}
timer.setExpression(expression);
//设置开始时间为time秒调一次
//数据有任务触发器
if(timer.getName() != null) {
//设置TriggerKey
TriggerKey triggerKey = TriggerKey.triggerKey(timer.getName(), timer.getGroup());
//设置JobKey
JobKey jobKey = JobKey.jobKey(timer.getJobName(), timer.getJobGroup());
//判断当前任务存在
boolean isExists = scheduler.checkExists(triggerKey);
if(isExists) {
//停止任务
// scheduler.pauseTrigger(triggerKey);
// scheduler.pauseJob(jobKey);
//更新任务时间设置
timerMapper.updateByNameAndGroup(timer);
//启动任务
scheduler.resumeJob(jobKey);
scheduler.resumeTrigger(triggerKey);
scheduler.start();
}
}
return toString(timer);
}
public String toString(Timer timer) {
String beforeExpression = timer.getBeforeExpression().replace("*", "").replace("/", "").replace("?", "").trim();
String expression = timer.getExpression().replace("*", "").replace("/", "").replace("?", "").trim();
StringBuffer sb = new StringBuffer("任务名: "+timer.getJobName());
sb.append("\r\n<br/>");
sb.append("任务所属组: "+timer.getJobGroup());
sb.append("\r\n<br/>");
sb.append("上一次时间设置:每 "+beforeExpression+" 秒执行一次");
sb.append("\r\n<br/>");
sb.append("当前的时间设置:每 "+expression+" 秒执行一次");
return sb.toString();
}
}
六、最后给下Timer和TimerVo类
public class TimerVo extends Timer{
private String month;
private String day;
private String week;
private String hour;
private String minute;
private String secord;
public String getMonth() {
return month;
}
public void setMonth(String month) {
this.month = month;
}
public String getDay() {
return day;
}
public void setDay(String day) {
this.day = day;
}
public String getWeek() {
return week;
}
public void setWeek(String week) {
this.week = week;
}
public String getHour() {
return hour;
}
public void setHour(String hour) {
this.hour = hour;
}
public String getMinute() {
return minute;
}
public void setMinute(String minute) {
this.minute = minute;
}
public String getSecord() {
return secord;
}
public void setSecord(String secord) {
this.secord = secord;
}
@Override
public String toString() {
return "TimerVo [month=" + month + ", day=" + day + ", week=" + week + ", hour=" + hour + ", minute=" + minute
+ ", secord=" + secord + "]";
}
}
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public class Timer {
private String name;
private String group;
private String expression;
private String jobName;
private String jobGroup;
private String beforeExpression;
public String getBeforeExpression() {
return beforeExpression;
}
public void setBeforeExpression(String beforeExpression) {
this.beforeExpression = beforeExpression;
}
public String getJobName() {
return jobName;
}
public void setJobName(String jobName) {
this.jobName = jobName;
}
public String getJobGroup() {
return jobGroup;
}
public void setJobGroup(String jobGroup) {
this.jobGroup = jobGroup;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getGroup() {
return group;
}
public void setGroup(String group) {
this.group = group;
}
public String getExpression() {
return expression;
}
public void setExpression(String expression) {
this.expression = expression;
}
@Override
public String toString() {
return "Timer [name=" + name + ", group=" + group + ", expression=" + expression + "]";
}
}
七、mapper层这样写
@Repository
public interface TimerMapper {
@Select("select t.trigger_name,t.trigger_group,t.job_name,t.job_group,q.cron_expression from qrtz_cron_triggers q,qrtz_triggers t where 1=1 and t.trigger_name=q.trigger_name and t.trigger_name=#{name}")
@Results({
@Result(property = "name", column = "trigger_name"),
@Result(property = "group", column = "trigger_group"),
@Result(property = "jobName", column = "job_name"),
@Result(property = "jobGroup", column = "job_group"),
@Result(property = "expression", column = "cron_expression")
})
Timer getCronTrigger(Timer timer);
@Update("update qrtz_cron_triggers set cron_expression = #{expression} where trigger_name = #{name} and trigger_group = #{group}")
void updateByNameAndGroup(Timer timer);
}
Controller就不再上代码了，这个就是方法调用了，相信大家都没问题。
总结：
1、问题最大的是数据库的建立，下载的quartz包中有SQL脚本，很坑的是在postgresql中不能一口气去执行。
2、版本间的依赖总算是摸索出了一套可用的，踩了不少坑。
3、cron表达式的按周，其实一般来说是带上星期几的，例如：每周一，每周三..
4、网上很多写法都是重新new了一个job，我是在数据库先查到那个任务，然后直接更新表达式，再启动一次任务，写法有些不同。
暂时就想到这么多了。