dom4j生成xml时添加standalone属性

[小小嗨皮]

我现在用dom4j生成xml文件时默认是<?xml version="1.0" encoding="utf-8"?>，想要变成<?xml version="1.0" encoding="UTF-8" standalone="no" ?>，不知道如何修改。

[stl0]

引用个高人解答
------------------------------------------------------------
dom4j's XMLWriter doesn't support this currently, you could
override the writeDeclaration method though:

public class StandaloneWriter extends XMLWriter {

protected void writeDeclaration() throws IOException {
  OutputFormat format = getOutputFormat();

  String encoding = format.getEncoding();

  if (!format.isSuppressDeclaration()) {
    if (encoding.equals("UTF8")) {
      writer.write("<?xml version=\"1.0\"");

      if (!format.isOmitEncoding()) {
        writer.write(" encoding=\"UTF-8\"");
      }

      writer.write(" standalone=\"true\"");
      writer.write("?>");
    } else {
      writer.write("<?xml version=\"1.0\"");

      if (!format.isOmitEncoding()) {
        writer.write(" encoding=\"" + encoding + "\"");
      }

      writer.write(" standalone=\"true\"");
      writer.write("?>");
    }

    if (format.isNewLineAfterDeclaration()) {
      println();
    }
  }
}

Regards

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