File file = new File(pathToFile);
fileIn = new FileReader(pathToFile);
BufferedReader br = new BufferedReader(fileIn);
fileContents = new StringBuilder((int) file.length());
String line;
try {
    while ((line = br.readLine()) != null) {
    fileContents.append(line);
    fileContents.append("\n");
} ...

...
return fileContents.toString();

String myStatement = "UPDATE ...... SET CONTENT = RAWTOHEX('" + myRetunedFileContentsString + "')...