kettle gbk 转 asvii 乱码

public boolean processRow(StepMetaInterface smi, StepDataInterface sdi) throws KettleException
{
 if (first){
   first = false;

 }

 Object[] r = getRow();

 if (r == null) {
   setOutputDone();
   return false;
 }
    r = createOutputRow(r, data.outputRowMeta.size());
   
   /*中文字段 开始*/

    String DESCRIPTION = get(Fields.In, "DESCRIPTION").getString(r);

    String  DESCRIPTIONS =  getByte(DESCRIPTION) ;

    get(Fields.Out, "DESCRIPTION").setValue(r, DESCRIPTIONS);

   /*中文字段 结束 */

    putRow(data.outputRowMeta, r);

 return true;
}
/**
* 王宝超
*/
public String getByte(String s) {
 try {
  s = new String(s.getBytes("GBK"), "ISO-8859-1");
 } catch (Exception e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
  return s;
}