使用java将xml格式化

将生成的xml用ie浏览器打开，就可以见到漂亮的缩进的xml schema.

但是每次都这样也不方便。在java程序中，直接使用jdk的javax.xml.transform.Transformer即可完成。

而且如果有节点未被匹配，也能通过错误提示及时发现。

 

  先贴代码如下:

   

import java.io.File;
import java.io.StringReader;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.xml.sax.InputSource;

public class XmlUtils {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		SaveXMLWithIndent("<node><content>test</content><anotherNode/></node>","demo.xml");
	}
	
	
	public static void SaveXMLWithIndent(String xml,String fileName) {
		try {
			Document doc = getDocumentFromString(xml);
			DOMSource src = new DOMSource(doc);
			//StreamResult sr = new StreamResult(System.out);
			StreamResult sr = new StreamResult(new File(fileName));
			TransformerFactory tf = TransformerFactory.newInstance();
			Transformer t = tf.newTransformer();
			t.setOutputProperty(OutputKeys.INDENT, "yes");
			t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
			t.setOutputProperty(OutputKeys.METHOD, "xml");
			t.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
			t.transform(src, sr);
			
		}catch(Exception e) {
			e.printStackTrace();
		}
	}
	
	
	public static Document getDocumentFromString(String xml) throws Exception {
        Document doc = null;
        DocumentBuilderFactory factory =  DocumentBuilderFactory.newInstance();
        factory.setNamespaceAware(true);
        DocumentBuilder builder = factory.newDocumentBuilder();
        doc = builder.parse(new InputSource(new StringReader(xml)));
        return doc;
    }

}

 

   最后效果如下:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<node>
  <content>test</content>
  <anotherNode/>
</node>