我尝试在java中编写一个简单的strin替换。这是java代码。在我的测试环境（Linux Ubuntu 12.04 LTS，tomcat）工作得很好。在生产环境中，它会引起无效的反应。
如何避免这种情况....在System.out中，字符串被正确显示。错误在行
fo=fo.replaceAll("##idEelemento##", mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_NAME).toString());
这是班级：
/**
*
*/
package mdtFOP;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.List;
import java.util.UUID;
import org.alfresco.model.ContentModel;
import org.alfresco.service.cmr.model.FileInfo;
import org.alfresco.service.cmr.repository.ContentReader;
import org.alfresco.service.cmr.repository.ContentWriter;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.search.ResultSet;
import org.alfresco.service.cmr.search.SearchService;
import org.alfresco.service.namespace.QName;
/**
* @author marcello
*
*/
public class fopMDT {
private static String fo="";
/**
*
*/
public fopMDT() {
// TODO Auto-generated constructor stub
}
public static void GenerateLabelPaper(NodeRef nodeRef){
ContentReader reader=null;
System.out.println("MDT - Begin Generate label paper procedure . Class: mdtFOP. Method : GenerateLabelPaper(nodeRef) ...");
if(mdt.mdtBehaviours.fileFolderService.getFileInfo(nodeRef).isFolder()==true){
System.out.println("MDT - Try to generate A4 QR label PDF file for just created folder.");
System.out.println("MDT - Loading mdtQR stylesheet for FO transformations");
try {
System.out.println("MDT - Reading content of barcodeFile XML file");
String barcode= readBarcodeXML();
System.out.println("MDT - Locate and Iterate trought fo files in mdtAdmin site");
ResultSet fopFolder = mdt.mdtBehaviours.searchService.query(mdt.mdtBehaviours.storeRef, SearchService.LANGUAGE_XPATH, "/app:company_home/st:sites/cm:mdtadmin/cm:documentLibrary/cm:xmlTemplate/cm:FOP/cm:fo");
List<FileInfo> foFiles = mdt.mdtBehaviours.fileFolderService.listFiles(fopFolder.getNodeRef(0));
System.out.println("MDT - find " + foFiles.size() +" .fo files in mdtAdmin site folder: " +mdt.mdtBehaviours.fileFolderService.getFileInfo(fopFolder.getNodeRef(0)).getName());
for (FileInfo foFile:foFiles){System.out.println("MDT - " + foFile.getName());}
for (FileInfo foFile:foFiles){
System.out.println("MDT - Begin label creation for file "+ foFile.getName()+". Read content...");
reader = mdt.mdtBehaviours.contentService.getReader(foFile.getNodeRef(), ContentModel.PROP_CONTENT);
fo = reader.getContentString();
System.out.println("MDT - DEBUG - fo content: " + "\r" + fo);
System.out.println("MDT - Inject folder data before PDF creation from folder: " + mdt.mdtBehaviours.fileFolderService.getFileInfo(nodeRef).getName());
System.out.println("MDT - Inject idElemento: " + mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_NAME).toString());
fo=fo.replaceAll("##idEelemento##", mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_NAME).toString());
System.out.println("MDT - Inject descrizione: " + mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_DESCRIPTION).toString());
fo=fo.replaceAll("##descrizione##", mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_DESCRIPTION).toString());
System.out.println("MDT - Inject articolo: "+ mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_DESCRIPTION).toString());
fo=fo.replaceAll("##articolo##", mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_DESCRIPTION).toString());
System.out.println("MDT - Inject barcode data before PDF creation...");
fo=fo.replaceAll("<fo:inline>mdtQRCODE</fo:inline>", barcode.replaceAll("MDTQRMDTQR", mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_NAME).toString()));
String tempFileName = String.valueOf(UUID.randomUUID())+".fo";
System.out.println("MDT - Begin fo transfomation on disk for file: " + foFile.getName());
try{
System.out.println("MDT - TempFileName: " + tempFileName);
File tempFile = new File(tempFileName);
FileWriter file = new FileWriter(tempFile);
BufferedWriter out = new BufferedWriter (file);
out.write(fo);
out.close();
System.out.println("MDT - Starting FOP from command line: ");
Process fop;
String fopCommand = "/opt/fop-1.1/fop -fo "+tempFileName+" -pdf "+tempFileName+".pdf";
System.out.println("MDT - " + fopCommand);
fop= Runtime.getRuntime().exec(fopCommand);
int fopExit =fop.waitFor();
if (fopExit==0){
System.out.println("MDT - Conversion with FOP terminate WITHOUT error.");
QName contentQName = QName.createQName("{http://www.alfresco.org/model/content/1.0}content");
FileInfo pdfFile = mdt.mdtBehaviours.fileFolderService.create(nodeRef,"QR-"+tempFileName+"-"+mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_NAME).toString()+".pdf", contentQName);
NodeRef pdf = pdfFile.getNodeRef();
ContentWriter writer = mdt.mdtBehaviours.contentService.getWriter(pdf, ContentModel.PROP_CONTENT, true);
System.out.println("MDT - Put PDF label file, " +pdfFile.getName()+" in MDT folder: " + mdt.mdtBehaviours.fileFolderService.getFileInfo(nodeRef).getName() );
writer.setMimetype("application/pdf");
writer.guessEncoding();
tempFile= new File(tempFileName+".pdf");
writer.putContent(tempFile);
}
}catch (Exception e){
System.out.println("MDT - Something went wrong during FOP conversion: error Stack: "+ e.getMessage());
e.printStackTrace();
} finally {
System.out.println("MDT - Delete .fo and .pdf temporary files from disk.");
File f = new File(tempFileName);
if (f.exists()){f.delete();};
f= new File(tempFileName+".pdf");
if (f.exists()){f.delete();};
System.out.println("MDT - Temporary file deleted");
}
}
} catch (Exception e){
System.out.println("MDT - Something went wrong in FOP conversion routine: error Stack: "+ e.getMessage());
e.printStackTrace();
}
} else { System.out.println("MDT - Skip QR creation on this behaviours because node is type:content");
}
}
public static String readBarcodeXML(){
ContentReader reader=null;
ResultSet barcodeConfigFile= mdt.mdtBehaviours.searchService.query(mdt.mdtBehaviours.storeRef, SearchService.LANGUAGE_XPATH, "/app:company_home/st:sites/cm:mdtadmin/cm:documentLibrary/cm:xmlTemplate/cm:FOP/cm:barcodeConfig.properties");
reader = mdt.mdtBehaviours.contentService.getReader(barcodeConfigFile.getNodeRefs().get(0), ContentModel.PROP_CONTENT);
String barcodeXMLFileName = reader.getContentString();
System.out.println("MDT - Barcode file name from : "+ mdt.mdtBehaviours.fileFolderService.getFileInfo(barcodeConfigFile.getNodeRef(0)).getName());
ResultSet barcodeFile= mdt.mdtBehaviours.searchService.query(mdt.mdtBehaviours.storeRef, SearchService.LANGUAGE_XPATH, "/app:company_home/st:sites/cm:mdtadmin/cm:documentLibrary/cm:xmlTemplate/cm:FOP/cm:"+barcodeXMLFileName);
System.out.println("MDT - Using Barcode file name : "+ mdt.mdtBehaviours.fileFolderService.getFileInfo(barcodeFile.getNodeRef(0)).getName());
reader = mdt.mdtBehaviours.contentService.getReader(barcodeFile.getNodeRef(0), ContentModel.PROP_CONTENT);
String barcode = reader.getContentString();
System.out.println("MDT - DEBUG : QR barcode XML file content: " + "\r" + barcode);
return barcode;
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
}
}
答案 0 :(得分：0)
在应用方法之前进行null检查..
if(fo!=null)
fo=fo.replaceAll("##idEelemento##", mdt.mdtBehaviours.nodeService.getProperty(nodeRef, ContentModel.PROP_NAME).toString());
}