io.polaris.core.xml.Jaxb Maven / Gradle / Ivy
package io.polaris.core.xml;
import io.polaris.core.io.IO;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import java.io.*;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
/**
* JAXB（Java Architecture for XML Binding），根据XML Schema 实现xml和Bean互转。
*
* @author Qt
* @since 1.8
*/
public class Jaxb {
public static String toXml(Object bean) {
return toXml(bean, StandardCharsets.UTF_8, true);
}
public static String toXml(Object bean, Charset charset, boolean format) {
StringWriter writer;
try {
JAXBContext context = JAXBContext.newInstance(bean.getClass());
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, format);
marshaller.setProperty(Marshaller.JAXB_ENCODING, charset.name());
writer = new StringWriter();
marshaller.marshal(bean, writer);
} catch (JAXBException e) {
throw new RuntimeException(e);
}
return writer.toString();
}
public static T toBean(String xml, Class c) {
return toBean(new StringReader(xml), c);
}
public static T toBean(File file, Charset charset, Class c) throws IOException {
return toBean(new BufferedReader(new InputStreamReader(new FileInputStream(file), charset)), c);
}
@SuppressWarnings("unchecked")
public static T toBean(Reader reader, Class c) {
try {
JAXBContext context = JAXBContext.newInstance(c);
Unmarshaller unmarshaller = context.createUnmarshaller();
return (T) unmarshaller.unmarshal(reader);
} catch (JAXBException e) {
throw new RuntimeException(e);
} finally {
IO.close(reader);
}
}
}