MQ Publisher: Replace XML data using Pattern Matching

import lrapi.lr;
import java.io.*;
import java.util.*;
import com.ibm.mq.*;
import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageProducer;
import javax.jms.Session;

import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class Actions
{

    private MQQueueManager myQueueManager;
    private MQPutMessageOptions myPutMsgOptions;
    private MQQueue myQueue;

    private String xmlStr = null;
    private String finalFileName = null;
    private String xmlDocument = null;
    private Session session = null;
    private MessageProducer producer = null;
    private Connection conn = null;
    private Message message = null;
    private String Formatted_msg = null;


    public int init() throws Throwable {
try {
   MQEnvironment.hostname = "abcd.com";
   MQEnvironment.properties.put(MQC.TRANSPORT_PROPERTY,MQC.TRANSPORT_MQSERIES_CLIENT);
   MQEnvironment.channel = "SYSTEM.DEF.SVRCONN";
   MQEnvironment.port = 100;

   myQueueManager = new MQQueueManager("aa.bb.cc.dd");
   int openOptions = MQC.MQOO_OUTPUT | MQC.MQOO_INQUIRE | MQC.MQOO_FAIL_IF_QUIESCING;

   myQueue = myQueueManager.accessQueue("DI.DC.WMS.MIF.DISTRIBUTIONORDER", openOptions, null, null, null);

   myPutMsgOptions = new MQPutMessageOptions();
   myPutMsgOptions.options = MQC.MQPMO_NONE;
} catch (Exception e) {
   System.out.println(e);
}
return 0;
    }//end of init

    public int action() throws Throwable {
try {
   MQMessage myPutMessage = new MQMessage();
   myPutMessage.clearMessage();
   myPutMessage.persistence = MQC.MQPER_PERSISTENT;
   myPutMessage.format = MQC.MQFMT_STRING;
         
   FileReader fr = null;
   File f=new File("C:\\AdvXMLs\\<pInputXML>.xml");


   int fileLength = (int) f.length();
   char[] cbuf = new char[fileLength];

 
   try {
     fr = new FileReader(f);
     fr.read(cbuf);
   } catch (FileNotFoundException e) {
     lr.error_message("Could not find data file: " + f);
     lr.abort();
   } catch (IOException e) {
     lr.error_message("Error reading file: " + f);
     lr.abort();
   } finally{
   try{
if(fr!=null){
   fr.close();
}
   }catch(IOException ioe){
     lr.error_message("Error closing file reader: " + ioe);
     lr.abort();
   }
}

 
   new String(cbuf);
            String xmlDocument = String.valueOf(cbuf);
     System.out.println("Read XML:\n" +xmlDocument);

            Pattern pattern1 = Pattern.compile("(<DistributionOrderId>)+(\\d)+(</DistributionOrderId>)");
   Pattern pattern2 = Pattern.compile("(<DistroNumber>)+(\\d)+(</DistroNumber>)");
   Pattern pattern3 = Pattern.compile("(<ARAcctNbr>)+(\\d)+(</ARAcctNbr>)");
   Pattern pattern4 = Pattern.compile("(<PurchaseOrderNbr>)+(\\d)+(</PurchaseOrderNbr>)");
   Pattern pattern5 = Pattern.compile("(<AssortmentNbr>)+(\\d)+(</AssortmentNbr>)");

   Matcher m1 = pattern1.matcher(xmlDocument);
            String str2 = m1.replaceAll("<DistributionOrderId><pOrderId></DistributionOrderId>");

   Matcher m2 = pattern2.matcher(str2);
   str2 = m2.replaceAll("<DistroNumber><pOrderId></DistroNumber>");

   Matcher m3 = pattern3.matcher(str2);
   str2 = m3.replaceAll("<ARAcctNbr><pOrderId></ARAcctNbr>");

   Matcher m4 = pattern4.matcher(str2);
   str2 = m4.replaceAll("<PurchaseOrderNbr><pOrderId></PurchaseOrderNbr>");

   Matcher m5 = pattern5.matcher(str2);
   str2 = m5.replaceAll("<AssortmentNbr><pAssortmentNo></AssortmentNbr>");

   Formatted_msg =  str2;
   System.out.println("str3:\n" +str2);
           
lr.start_transaction("Create_DO");

//      myQueue.put(myPutMessage, myPutMsgOptions);
} catch (Exception e) {
   System.out.println(e);
}
       
lr.end_transaction("Create_DO", lr.AUTO);

return 0;
    }//end of action

    public int end() throws Throwable {
try {
    myQueue.close();
    myQueueManager.disconnect();
} catch (Exception e ) {
   System.out.println(e);
}
return 0;
    }//end of end
}