Java Properties object to String

java, properties, string

Solution

public static String getPropertyAsString(Properties prop) {    
  StringWriter writer = new StringWriter();
  prop.list(new PrintWriter(writer));
  return writer.getBuffer().toString();
}

Problem

I have a Java `Properties` object that I load from an in-memory `String`, that was previously loaded into memory from the actual `.properties` file like this: ``` this.propertyFilesCache.put(file, FileUtils.fileToString(propFile)); ``` The util `fileToString` actually reads in the text from the file and the rest of the code stores it in a `HashMap` called `propertyFilesCache`. Later, I read the file text from the `HashMap` as a `String` and reload it into a Java `Properties` object like so: ``` String propFileStr = this.propertyFilesCache.get(fileName); Properties tempProps = new Properties(); try { tempProps.load(new ByteArrayInputStream(propFileStr.getBytes())); } catch (Exception e) { log.debug(e.getMessage()); } tempProps.setProperty(prop, propVal); ``` At this point, I've replaced my property in my in-memory property file and I want to get the text from the `Properties` object as if I was reading a `File` object like I did up above. Is there a simple way to do this or am I going to have to iterate over the properties and create the `String` manually?

Original source