java集成kettle 示例：
方案：
启用定时任务，调用PDI生成的trans.ktr文件
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<repository>
<id>pentaho-releases</id>
<url>http://repository.pentaho.org/artifactory/repo/</url>
</repository>
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<kettle.version>6.1.0.1-196</kettle.version>
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<dependency>
<groupId>pentaho-kettle</groupId>
<artifactId>kettle-core</artifactId>
<version>${kettle.version}</version>
</dependency>
<dependency>
<groupId>com.verhas</groupId>
<artifactId>license3j</artifactId>
<version>1.0.7 </version>
</dependency>
<dependency>
<groupId>pentaho-kettle</groupId>
<artifactId>kettle-dbdialog</artifactId>
<version>${kettle.version}</version>
</dependency>
<dependency>
<groupId>pentaho-kettle</groupId>
<artifactId>kettle-engine</artifactId>
<version>${kettle.version}</version>
</dependency>
<dependency>
<groupId>pentaho</groupId>
<artifactId>metastore</artifactId>
<version>${kettle.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>19.0</version>
</dependency>
</dependencies>
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DEMO:
 211-whicoDB-in_student(table) 插入更新到 localhost-whicoDB-in_student(table) 的trans文件
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import org.pentaho.di.core.KettleEnvironment;
import org.pentaho.di.core.util.EnvUtil;
import org.pentaho.di.job.Job;
import org.pentaho.di.job.JobMeta;
import org.pentaho.di.trans.Trans;
import org.pentaho.di.trans.TransMeta;
/**
* kettle version 6.1.0.1-196
* @author jiangnan
*
*/
public class KettleUtil
{
/**
* 调用trans文件
* @param transFileName
* @throws Exception
*/
public static void callNativeTrans(String transFileName) throws Exception{
callNativeTransWithParams(null, transFileName);
}
/**
* 调用trans文件 带参数的
* @param params
* @param transFileName
* @throws Exception
*/
public static void callNativeTransWithParams(String[] params ,String transFileName) throws Exception{
// 初始化
KettleEnvironment.init();
EnvUtil.environmentInit();
TransMeta transMeta = new TransMeta(transFileName);
//转换
Trans trans = new Trans(transMeta);
//执行
trans.execute(params);
//等待结束
trans.waitUntilFinished();
//抛出异常
if(trans.getErrors()
> 0){
throw new Exception("There
are errors during transformation exception!(传输过程中发生异常)");
}
}
/**
* 调用job文件
* @param jobName
* @throws Exception
*/
public static void callNativeJob(String jobName) throws Exception{
// 初始化
KettleEnvironment.init();
JobMeta jobMeta = new JobMeta(jobName,null);
Job job = new Job(null, jobMeta);
//向Job 脚本传递参数，脚本中获取参数值：${参数名}
//job.setVariable(paraname, paravalue);
job.start();
job.waitUntilFinished();
if (job.getErrors()
> 0) {
throw new Exception("There
are errors during job exception!(执行job发生异常)");
}
}
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import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import com.stech.business.util.KettleUtil;
public class kettleTaskJob
{
private static Logger LOGGER =
LogManager.getLogger(kettleTaskJob.class.getName());
public void run() throws Exception
{
LOGGER.info("*****kettle定时任务运行开始******");
String transFileName = "D:/work/kettle/trans.ktr";
KettleUtil.callNativeTrans(transFileName);
LOGGER.info("*****kettle定时任务运行结束******");
}
public static void main(String[] args) throws Exception
{
kettleTaskJob job = new kettleTaskJob();
job.run();
}
}
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2016-11-15 11:47:33,856 INFO (VfsLog.java:136)
- Using "C:\Users\jiangnan\AppData\Local\Temp\vfs_cache" as temporary files store.
2016/11/15 11:47:34 - trans - 为了转换解除补丁开始 [trans]
2016/11/15 11:47:37 - 表输入.0 - Finished reading query, closing connection.
2016/11/15 11:47:37 - 表输入.0 - 完成处理 (I=47, O=0, R=0, W=47, U=0, E=0)
2016/11/15 11:47:38 - 插入 / 更新.0 - 完成处理 (I=47, O=47, R=47, W=47, U=0, E=0)
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异常问题解决：
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2016-11-15 13:30:41,438 INFO (VfsLog.java:136)
- Using "C:\Users\jiangnan\AppData\Local\Temp\vfs_cache" as temporary files store.
Exception in thread "main" java.lang.NoSuchMethodError: com.google.common.base.Suppliers.supplierFunction()Lcom/google/common/base/Function;
at org.pentaho.di.core.extension.ExtensionPointMap.get(ExtensionPointMap.java:120)
at org.pentaho.di.core.extension.ExtensionPointHandler.callExtensionPoint(ExtensionPointHandler.java:45)
at org.pentaho.di.trans.TransMeta.loadXML(TransMeta.java:3368)
at org.pentaho.di.trans.TransMeta.<init>(TransMeta.java:2732)
at org.pentaho.di.trans.TransMeta.<init>(TransMeta.java:2684)
at org.pentaho.di.trans.TransMeta.<init>(TransMeta.java:2661)
at org.pentaho.di.trans.TransMeta.<init>(TransMeta.java:2641)
at org.pentaho.di.trans.TransMeta.<init>(TransMeta.java:2606)
at org.pentaho.di.trans.TransMeta.<init>(TransMeta.java:2569)
at com.stech.business.util.KettleUtil.callNativeTrans(KettleUtil.java:21)
at com.stech.business.quartz.kettleTaskJob.run(kettleTaskJob.java:13)
at com.stech.business.quartz.kettleTaskJob.main(kettleTaskJob.java:19)
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