Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;

import javax.xml.xpath.XPathFactory;
import javax.xml.transform.TransformerFactory;

import java.io.ByteArrayInputStream;
import org.xml.sax.InputSource;
import org.w3c.dom.Node;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.Transformer;
import java.io.StringWriter;

public class Main {
    public static String prettyXML(String xml, int indent) {
        try {
            // Turn xml string into a document
            Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder()
                    .parse(new InputSource(new ByteArrayInputStream(xml.getBytes("utf-8"))));

            // Remove whitespaces outside tags
            XPath xPath = XPathFactory.newInstance().newXPath();
            NodeList nodeList = (NodeList) xPath.evaluate("//text()[normalize-space()='']", document,
                    XPathConstants.NODESET);

            for (int i = 0; i < nodeList.getLength(); ++i) {
                Node node = nodeList.item(i);
                node.getParentNode().removeChild(node);
            }
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            transformerFactory.setAttribute("indent-number", indent);
            Transformer transformer = transformerFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
            transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");

            StringWriter stringWriter = new StringWriter();
            transformer.transform(new DOMSource(document), new StreamResult(stringWriter));
            return stringWriter.toString();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}