运用Java调用Kettle Job和Trans（带参数）

1.首先创建一个kettle trans

2.对表输入进行编辑

${dateNow}为要传入的参数。

3.代码编写

首先需要把包导入

import org.pentaho.di.core.KettleEnvironment;
import org.pentaho.di.core.exception.KettleException;
import org.pentaho.di.job.Job;
import org.pentaho.di.job.JobMeta;
import org.pentaho.di.trans.Trans;
import org.pentaho.di.trans.TransMeta;

public class KettleTest {

    /**包
     * @param args
     * @throws KettleException
     */
    public static void runJob(String jobFile) throws KettleException{
        KettleEnvironment.init();
        JobMeta jm = new JobMeta(jobFile,null);
        Job job = new Job(null,jm);
        job.setVariable("dateNow", "2016-01-05");
        job.start();
        job.waitUntilFinished();
    }

    public static void runTrans(String transFile) throws KettleException{
        KettleEnvironment.init();
        TransMeta tm = new TransMeta(transFile);
        Trans trans = new Trans(tm);
        trans.setVariable("dateNow", "2016-01-03");
        trans.execute(null);
        trans.waitUntilFinished();
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String fileName = "F:\\zcr\\工作空间\\kettleWorkSpace\\kettleTrans.ktr";
        try {
            runTrans(fileName);
        } catch (KettleException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }

}

trans 通过 Trans.setVariable(String,String)传递参数。

第一个参数就是ktr中的变量，比如上面的${dateNow}。我们可以通过Trans.setVariable(dateNow,”2016-01-05”)这个个函数把2016-01-05这个字符串赋给dateNow

Job通过Job.setVariable(String,String)传递参数，用法和trans用法一致。