javax.xml.bind.Marshaller 使用十进制值对 unicode 字符进行编码

使用javax.xml.bind.Marshaller对Unicode字符进行编码可以确保在XML文档中正确地表示这些字符。Unicode是一个字符集，它为世界上所有的字符提供了一个唯一的标识符。在XML中，Unicode字符可以通过使用其十进制值来表示。

java
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
public class UnicodeEncodingExample {
    public static void main(String[] args) {
        try {
            // 创建JAXBContext
            JAXBContext context = JAXBContext.newInstance(YourClass.class);
            // 创建Marshaller
            Marshaller marshaller = context.createMarshaller();
            // 设置编码方式为UTF-8，并对Unicode字符进行编码
            marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
            marshaller.setProperty("com.sun.xml.bind.characterEscapeHandler",
                    new UnicodeCharacterEscapeHandler());
            // 将Java对象转换为XML，并输出到控制台
            YourClass object = new YourClass();
            marshaller.marshal(object, System.out);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
    }
}
class UnicodeCharacterEscapeHandler implements CharacterEscapeHandler {
    @Override
    public void escape(char[] ch, int start, int length, boolean isAttVal, Writer out)
            throws IOException {
        StringBuilder escaped = new StringBuilder();
        for (int i = start; i < start + length; i++) {
            char c = ch[i];
            if (c >= '\u007F') {
                escaped.append("&#x").append(Integer.toHexString(c)).append(";");
            } else {
                escaped.append(c);
            }
        }
        out.write(escaped.toString());
    }
}

java
// 导入相关类
public class UnicodeEncodingExample {
    public static void main(String[] args) {
        try {
            // 创建JAXBContext
            // 创建Marshaller
            // 设置编码方式为UTF-8，并对Unicode字符进行编码
            // 将Java对象转换为XML，并输出到控制台
        } catch (JAXBException e) {
            e.printStackTrace();
        }
    }
}
class UnicodeCharacterEscapeHandler implements CharacterEscapeHandler {
    @Override
    public void escape(char[] ch, int start, int length, boolean isAttVal, Writer out)
            throws IOException {
        StringBuilder escaped = new StringBuilder();
        for (int i = start; i < start + length; i++) {
            char c = ch[i];
            if (c >= '\u007F') {
                escaped.append("&#x").append(Integer.toHexString(c)).append(";");
            } else {
                escaped.append(c);
            }
        }
        out.write(escaped.toString());
    }
}