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--- pretty_print_xml [2014/03/06 10:23]
+++ pretty_print_xml [2021/04/05 11:23] (current)
@@ Line 1: / Line 1: @@
+====== Pretty Print XML in Java ======
+There are several ways to pretty print XML in Java.
+===== Using Xerces =====
+<sxh java>
+    public static String format(String unformattedXml) {
+        try {
+            final Document document = parseXml(unformattedXml);
+            OutputFormat format = new OutputFormat(document);
+            format.setLineWidth(65);
+            format.setIndenting(true);
+            format.setIndent(2);
+            Writer out = new StringWriter();
+            XMLSerializer serializer = new XMLSerializer(out, format);
+            serializer.serialize(document);
+            return out.toString();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+    private static Document parseXml(String in) {
+        try {
+            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+            DocumentBuilder db = dbf.newDocumentBuilder();
+            InputSource is = new InputSource(new StringReader(in));
+            return db.parse(is);
+        } catch (ParserConfigurationException e) {
+            throw new RuntimeException(e);
+        } catch (SAXException e) {
+            throw new RuntimeException(e);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+</sxh>
+===== Using Standard Java Library =====
+<sxh java>
+public static String prettyFormat(String input, int indent) {
+    try {
+        Source xmlInput = new StreamSource(new StringReader(input));
+        StringWriter stringWriter = new StringWriter();
+        StreamResult xmlOutput = new StreamResult(stringWriter);
+        TransformerFactory transformerFactory = TransformerFactory.newInstance();
+        transformerFactory.setAttribute("indent-number", indent);
+        Transformer transformer = transformerFactory.newTransformer();
+        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
+        transformer.transform(xmlInput, xmlOutput);
+        return xmlOutput.getWriter().toString();
+    } catch (Exception e) {
+        throw new RuntimeException(e); // simple exception handling, please review it
+    }
+}
+public static String prettyFormat(String input) {
+    return prettyFormat(input, 2);
+}
+</sxh>
+From http://stackoverflow.com/questions/139076/how-to-pretty-print-xml-from-java
+{{tag>devel java}}