VTD-XML是一个 Java 库,可修改部分 XML 文件,同时保留空白格式。
下面是使用 XPath 选择 XML 文件中某些属性的代码。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();
}
}
}