维护状态缩进中的XML格式

Question

我有一个XML文件，我打开并编辑节点中的几个属性，然后将其保存回来，但由于某种原因，保存的XML没有像以前那样正确缩进。

下面是我保存XML文件的代码:

    TransformerFactory transformerFactory = TransformerFactory.newInstance();       
    Transformer transformer = transformerFactory.newTransformer();
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    DOMSource source = new DOMSource(doc);
    StreamResult result = new StreamResult(new File(Path));
    transformer.transform(source, result); 

虽然我指定了

transformer.setOutputProperty(OutputKeys.INDENT, "yes"); 

XML没有正确缩进，我想让XML处于以前的状态(除了所做的更改)

任何帮助都将是非常感激的。

Answer 1

您需要启用'INDENT'并设置变压器的缩进量:

transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");

看看这是否有效。

Answer 2

VTD-XML是一个Java库，可以修改XML文件的部分内容，同时保留空白格式。

下面的代码使用XPath在XML文件中选择某些属性。代码修改所选属性的值，然后将结果写入输出文件。

import com.ximpleware.AutoPilot;
import com.ximpleware.ModifyException;
import com.ximpleware.NavException;
import com.ximpleware.TranscodeException;
import com.ximpleware.VTDGen;
import com.ximpleware.VTDNav;
import com.ximpleware.XMLModifier;
import com.ximpleware.XPathEvalException;
import com.ximpleware.XPathParseException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
public class TransformFile
{
    public static void main(String[] args)
        throws IOException, XPathParseException, ModifyException, NavException,
        XPathEvalException, TranscodeException
    {
        String inFilename = "input.xml";
        String outFilename = "output.xml";
        transform(inFilename, outFilename);
    }
    public static void transform(String inXmlFilePath, String outXmlFilePath)
        throws XPathParseException, ModifyException, XPathEvalException,
        NavException, IOException, TranscodeException
    {
        String xpath =
            "//Configuration[starts-with(@Name, 'Release')]/Tool[@Name = 'VCCLCompilerTool']/@BrowseInformation[. = '0']";
        OutputStream fos = new FileOutputStream(outXmlFilePath);
        try {
            VTDGen vg = new VTDGen();
            vg.parseFile(inXmlFilePath, false);
            VTDNav vn = vg.getNav();
            AutoPilot ap = new AutoPilot(vn);
            ap.selectXPath(xpath);
            XMLModifier xm = new XMLModifier(vn);
            int attrNodeIndex;
            while ((attrNodeIndex = ap.evalXPath()) != -1) {
                // An attribute value node always immediately follows an
                // attribute node.
                int attrValIndex = attrNodeIndex + 1;
                xm.updateToken(attrValIndex, "1");
            }
            xm.output(fos);
        }
        finally {
            fos.close();
        }
    }
}