java xml格式化_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(“test”,”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(“{外链网址已屏蔽}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:

test