Java Scala获取注解的类信息

org.reflections.Reflections

1）获得某个类型的所有子类型
2）获得标记了某个注解的所有类型／成员变量，支持注解参数匹配。
3）使用正则表达式获得所有匹配的资源文件
4）获得所有特定签名（包括参数，参数注解，返回值）的方法

<dependency>
    <groupId>org.reflections</groupId>
    <artifactId>reflections</artifactId>
    <version>0.9.11</version>
</dependency>

"org.reflections" % "reflections" % "0.9.11"

package com.today.service.financetask.job

import java.lang.annotation.*;

/**
 * 类功能描述：job 信息注解
 *
 * @author WangXueXing create at 19-5-4 上午9:14
 * @version 1.0.0
 */
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Inherited
public @interface JobInfo {
    /**
     * job id
     * @return
     */
    String jobId();

    /**
     * job name
     * @return
     */
    String jobName();

    /**
     * default cron
     * @return
     */
    String defaultCron();
}

package com.today.service.financetask.job

import java.util.Calendar

import com.today.api.checkaccount.scala.CheckAccountServiceClient
import com.today.api.checkaccount.scala.enums.FlatFormTypeEnum
import com.today.api.checkaccount.scala.request.ReconciliationRequest
import com.today.service.financetask.job.define.AbstractJob
import com.today.service.financetask.utils.JobInfo
import org.quartz.JobExecutionContext

/**
  * 自动对账
  */
@JobInfo(jobId="CHECK_ACCOUNT_PROCESS", jobName="对账系统自动对账定时任务", defaultCron="0 0 13 * * ?")
class CheckAccountJob extends AbstractJob{
  /**
    * start up the scheduled task
    *
    * @param context JobExecutionContext
    */
  override def run(context: JobExecutionContext): Unit = {
    val cal = Calendar.getInstance
    cal.add(Calendar.DATE, -1)
    new CheckAccountServiceClient().appReconciliation(new ReconciliationRequest(FlatFormTypeEnum.TODAY_APP,None))
  }
}

import com.today.service.financetask.action.DailyStatementAction
import com.today.service.financetask.job.define.AbstractJob
import com.today.service.financetask.utils.JobInfo
import org.quartz.JobExecutionContext
import org.springframework.stereotype.Service

/**
  * 日次处理定时任务处理
  *
  * @author zhangc create at 2018/5/11 14:08
  * @version 0.0.1
  */
@Service
@JobInfo(jobId="DAY_TIME_PROCESS", jobName="日次处理定时任务", defaultCron="0 30 2 * * ?")
class DayTimeProcessJob extends AbstractJob{
  /**
    * start up the scheduled task
    *
    * @param context JobExecutionContext
    */
  override def run(context: JobExecutionContext): Unit = {
    new DailyStatementAction().execute
  }
}

import java.util

import com.today.service.financetask.utils.JobInfo
import org.quartz.Job
import org.reflections.Reflections

import scala.collection.JavaConverters._
import scala.collection.mutable

/**
  * 通过注解获取所有通用Job信息
  *
  * @author BarryWang create at 2018/5/12 10:45
  * @version 0.0.1
  */
object JobEnum {
  /**
    * 获取添加JobInfo注解的类信息
    */
  val jobWithAnnotation: util.Set[Class[_]] = new Reflections("com.today.service.financetask.job").getTypesAnnotatedWith(classOf[JobInfo])

  /**
    * 获取所有job枚举值
    * @return
    */
  def values : mutable.Set[JobInfo] = jobWithAnnotation.asScala.map(getJobInfo(_))

  /**
    * 根据job class 获取job 信息
    * @param jobClass
    * @return
    */
  def getJobInfo(jobClass : Class[_]): JobInfo = jobClass.getAnnotation(classOf[JobInfo])

  /**
    * jobId与jobName映射关系
    * @return
    */
  def jobIdNameMap : Map[String, String]={
    jobWithAnnotation.asScala.map{sub =>
      val jobInfo = getJobInfo(sub)
      Map(jobInfo.jobId() -> jobInfo.jobName())
    }.fold(Map())((i,j) => i++j)
  }

  /**
    * JobObject与JobEnum映射关系
    * @return
    */
  def jobClassInfoMap: Map[String, JobInfo] = {
    jobWithAnnotation.asScala.map{sub =>
      Map(sub.getName -> getJobInfo(sub))
    }.fold(Map())((i,j) => i++j)
  }

  /**
    * jobId与JobEnum映射关系
    * @return
    */
  def jobIdInfoMap: Map[String, JobInfo] = {
    jobWithAnnotation.asScala.map{sub =>
      val jobInfo = getJobInfo(sub)
      Map(jobInfo.jobId() -> jobInfo)
    }.fold(Map())((i,j) => i++j)
  }

  /**
    * jobId与JobObject映射关系
    * @return
    */
  def jobIdClassMap: Map[String, Class[_ <: Job]] = {
    jobWithAnnotation.asScala.map{sub =>
      Map(getJobInfo(sub).jobId() -> sub.asInstanceOf[Class[_ <: Job]])
    }.fold(Map[String, Class[_ <: Job]]())((i,j) => i++j)
  }

  def main(args: Array[String]): Unit = {
    println(jobIdClassMap)
  }
}