java - 以 UTF-8 序列化 DOM 文档

Question

我一直在尝试删除代码中的所有 com.sun.org.apache.xml.internal 包，用稳定的替代方案替换它们。

这是我替换的一种方法...

import com.sun.org.apache.xml.internal.serialize.LineSeparator;
import com.sun.org.apache.xml.internal.serialize.OutputFormat;
import com.sun.org.apache.xml.internal.serialize.XMLSerializer;
...
...

    /**
     * @param source
     * @param target
     * @throws IOException
     */
    protected static void serialize( Document source, Writer target ) throws IOException
    {
        OutputFormat outputFormat = new OutputFormat( (Document) source );
        outputFormat.setLineSeparator( LineSeparator.Windows );
        // format.setIndenting(true);

        outputFormat.setLineWidth( 0 );
        outputFormat.setPreserveSpace( true );

        XMLSerializer serializer = new XMLSerializer( target, outputFormat );
        serializer.asDOMSerializer();
        serializer.serialize( source );
    } // end serialize

这是我发现的替代方案...

/**
 * @param source
 * @param target
 * @throws IOException
 * @throws IllegalAccessException 
 * @throws InstantiationException 
 * @throws ClassNotFoundException 
 * @throws ClassCastException 
 */
protected static void serialize( Document source, Writer target ) throws Exception
{
    DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();
    DOMImplementationLS impl = (DOMImplementationLS) registry.getDOMImplementation( "LS" );
    LSSerializer writer = impl.createLSSerializer();
    target.write( writer.writeToString(source) );
} // end serialize

但是，它在生成的 xml 中显示出差异。

它创造

<?xml version="1.0" encoding="UTF-16"?>

如何修改它以创建 UTF-8？

Answer 1

我认为你必须使用LSOutput:

LSOutput domOutput = impl.createLSOutput();
domOutput.setEncoding(StandardCharsets.UTF_8.name());
domOutput.setCharacterStream(stringWriter);

请参阅此处的回复以了解更多详细信息:

Change the com.sun.org.apache.xml.internal.serialize.XMLSerializer & com.sun.org.apache.xml.internal.serialize.OutputFormat