如何从同一包中读取file.xml？

Question

I'm trying to read a Properties.xml file which is include in the same package where my class is.

I'm using this code to update my xml file with new values:

So far, just I wanted to read the file:

public void UPdateXML(String filename) throws Exception {
    this.filename = filename;
        System.out.println("Into update xml class");
    try {   
        InputStream fis=BACENGPropertiesFile.class.getResourceAsStream(filename);
        DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
        Document doc = docBuilder.parse((InputStream) fis);

        System.out.println(fis);
        System.out.println(doc);

    Node child = doc.getFirstChild();
        System.out.println(child);

It seems that the file exist and is being reading as an ImputStream. But when I try to parse the file to Document (doc) the value is null.

This is the exit from the server logs:

Into update xml class
java.io.BufferedInputStream@78355ed4
[#document: null]
[properties: null]

The Properties xml file has the following structure:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
 <properties>
  <entry key="dataImport.path">/Users/Admin/Documents/</entry>
 </properties>

Could somebody tell me what is wrong?

Answer 1

There is nothing wrong. Your document is not null : it is printed as:

[#document: null]

If it would be null , this would be printed:

null

By the way, why don't you load properties via Properties.loadFromXML() ?

Properties p = new Properties();
try (InputStream in = BACENGPropertiesFile.class.getResourceAsStream(filename)) {
    p.loadFromXML(in);
}

Answer 2

What package do you place the Properties.xml to ? if it's under the package of UPdateXML, please change:

InputStream fis=BACENGPropertiesFile.class.getResourceAsStream(filename);

to

InputStream fis=UPdateXML.class.getResourceAsStream(filename);

anyway, What package your xml file locate, what classes under the package you should choose.