jaxb解析xml

最新推荐文章于 2023-05-18 10:45:48 发布

转载最新推荐文章于 2023-05-18 10:45:48 发布 · 483 阅读

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本文介绍如何使用Java将对象转换为XML，并通过自定义适配器实现日期对象的正确序列化和反序列化。

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import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import com.whclx.framework.common.exception.BusinessException;

public class BeanXmlUtil {

/**
* 将对象解析成XML
* @param obj
* @return
*/
public static String format(Object obj) {

  try {

   JAXBContext ctx = JAXBContext.newInstance(obj.getClass());

   ByteArrayOutputStream baos = new ByteArrayOutputStream();

   Marshaller m = ctx.createMarshaller();
   m.setProperty(Marshaller.JAXB_ENCODING, "GBK");
   m.marshal(obj, baos);

   return baos.toString();

  } catch (JAXBException e) {
   throw new IllegalStateException(e);
  }

}

/**
* 将对象解析成XML
* @param obj
* @return
*/
public static String formatUseUtf8(Object obj) {

  try {

   JAXBContext ctx = JAXBContext.newInstance(obj.getClass());

   ByteArrayOutputStream baos = new ByteArrayOutputStream();

   Marshaller m = ctx.createMarshaller();
   m.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
   m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
   m.marshal(obj, baos);

   return baos.toString();

  } catch (JAXBException e) {
   throw new IllegalStateException(e);
  }

}

/**
* 将XML解析成对象
*/
public static Object parse(String xml, Class<?> clazz) {

  xml = xml.replace("encoding=\"GBK\"", "encoding=\"UTF-8\"");

  try {
   JAXBContext ctx = JAXBContext.newInstance(clazz);
   ByteArrayInputStream bis = new ByteArrayInputStream( xml.getBytes("UTF-8") );
   Unmarshaller um = ctx.createUnmarshaller();
   return um.unmarshal(bis);

  } catch (JAXBException e) {
   throw new IllegalStateException(e);
  } catch (UnsupportedEncodingException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new BusinessException("不支持编码异常");
  }
}

/**
* 将XML解析成对象
*/
public static Object parseGBK(String xml, Class<?> clazz) {

  xml = xml.replace("encoding=\"UTF-8\"", "encoding=\"GBK\"");

  try {
   JAXBContext ctx = JAXBContext.newInstance(clazz);
   ByteArrayInputStream bis = new ByteArrayInputStream( xml.getBytes("GBK") );
   Unmarshaller um = ctx.createUnmarshaller();
   return um.unmarshal(bis);

  } catch (JAXBException e) {
   throw new IllegalStateException(e);
  } catch (UnsupportedEncodingException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   throw new BusinessException("不支持编码异常");
  }
}
}

import java.util.Date;

import javax.xml.bind.annotation.adapters.XmlAdapter;

import org.apache.commons.lang3.time.DateFormatUtils;
import org.apache.commons.lang3.time.DateUtils;

public class JavaDateXmlAdapter extends XmlAdapter<String, Date> {

/* (non-Javadoc)
* @see javax.xml.bind.annotation.adapters.XmlAdapter#unmarshal(java.lang.Object)
*/
@Override
public Date unmarshal(String v) throws Exception {
return DateUtils.parseDate(v, "yyyy-MM-dd HH:mm:ss");
}

/* (non-Javadoc)
* @see javax.xml.bind.annotation.adapters.XmlAdapter#marshal(java.lang.Object)
*/
@Override
public String marshal(Date v) throws Exception {
return DateFormatUtils.format(v, "yyyy-MM-dd HH:mm:ss");
}

}