Append the String in xml file-CodePudding

I have an xml file and String data, I want to add the String in xml file, I am beginner to Java, confusing how to open the xml and append String before xml syntax start. Below is the xml file

<?xml version="1.0"?>
-<AppHdr xmlns="urn:iso:std:iso:20022:tech:xsd:head.001.001.02">
-<Fr>
-<FIId>
-<Fin>
<BIC>AAA</BIC>
</Fin>
</FIId>
</Fr>
</AppHdr>

String value="Hello Append with xml";

Final output

Hello Append with xml<?xml version="1.0"?>
-<AppHdr xmlns="urn:iso:std:iso:20022:tech:xsd:head.001.001.02">
-<Fr>
-<FIId>
-<Fin>
<BIC>AAA</BIC>
</Fin>
</FIId>
</Fr>
</AppHdr>

CodePudding user response：

Try like this

try {
  File mFile = new File("C:\\name.xml");//path to file with name of file
  FileInputStream fis = new FileInputStream(mFile);
  BufferedReader br = new BufferedReader(new InputStreamReader(fis));
  StringBuilder result = new StringBuilder("Hello Append with xml");
  String line = "";
  while( (line = br.readLine()) != null){
    result.append(line);
    result.append(System.getProperty("line.separator"));
  }

  mFile.delete();
  FileOutputStream fos = new FileOutputStream(mFile);
  fos.write(result.toString().getBytes());
  fos.flush();
} catch (IOException e) {
  //exception handling
}

UPD: added this line result.append(System.getProperty("line.separator"));