我正试图从java程序运行pig命令。我希望pig在一个遥远的hadoop集群上以mapreduce模式运行。这是初始化pigserver的方法：

Properties configuration = new Properties();
PropertiesUtil.loadPropertiesFromFile(configuration, CONF_FILE);

configuration.setProperty("mapred.job.tracker", properties.getProperty(mapredJT_property, mapredJobTracker));
configuration.setProperty("fs.default.name", properties.getProperty(hdfsURI_property, fsDefaultName));

PigServer pigServer = new PigServer(ExecType.MAPREDUCE, configuration);

我经常会遇到这样的错误：

Exception in thread "main" org.apache.pig.backend.executionengine.ExecException: ERROR 4010: Cannot find hadoop configurations in classpath (neither hadoop-site.xml nor core-site.xml was found in the classpath). If you plan to use local mode, please put -x local option in command line
    at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.init(HExecutionEngine.java:162)
    at org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.init(HExecutionEngine.java:122)
    at org.apache.pig.impl.PigContext.connect(PigContext.java:301)
    at org.apache.pig.PigServer.<init>(PigServer.java:220)
    at org.apache.pig.PigServer.<init>(PigServer.java:205)
    at org.apache.pig.PigServer.<init>(PigServer.java:197)
    at com.mycompany.testpig.idmapreduce.toto(idmapreduce.java:68)
    at com.mycompany.testpig.idmapreduce.main(idmapreduce.java:46)

我找不到方法将hadoop-site.xml和core-site.xml文件提供给pig，以便它正确启动服务器。我一直在尝试设置这里描述的变量，没有结果。我正在使用maven和netbeans来运行/测试我的程序。我还试着把这两个文件放在我的项目的根目录下（src/旁边），但没有成功。
如果你有解决办法，请告诉我！
谢谢。