Java Architecture for XML Binding) 是一个业界的标准，是一项能够依据XML Schema产生Java类的技术。是一种xml与object映射绑定技术标准。
JDK5下面开发须要的jar包：activation.jar、jaxb-api.jar、 jaxb-impl.jar、 jsr173-api.jar
JDK6以上版本号已经集成JAXB2的JAR，在文件夹{JDK_HOME}/jre/lib/rt.jar中。
@XmlAccessorType 注解 的枚举常量值说明：
代码片段：
* xml字符串 转 pojo
*
* @param t
* @param xmlStr
* @return
*/
@SuppressWarnings("rawtypes")
public static Object jaxbReadXml(Class cls, String xmlStr) {
ByteArrayInputStream stream = null;
try {
JAXBContext context = JAXBContext.newInstance(cls);
stream = new ByteArrayInputStream(xmlStr.getBytes("utf-8"));
Unmarshaller um = context.createUnmarshaller();
return um.unmarshal(stream);
} catch (Exception e) {
e.printStackTrace();
logger.error("----xml转对象出错："+e.getMessage());
} finally {
if (stream != null) {
try {
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
return null;
} @SuppressWarnings("rawtypes")
public static Object jaxbReadXml(Class cls, byte[] bs) {
return jaxbReadXml(cls, new ByteArrayInputStream(bs));
} @SuppressWarnings("rawtypes")
public static Object jaxbReadXml(Class cls, InputStream in) {
try {
JAXBContext context = JAXBContext.newInstance(cls);
Unmarshaller um = context.createUnmarshaller();
return um.unmarshal(in);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
return null;
} /**
* pojo 转 xml字符串
*
* @param pojo
* @return
*/
public static <T> String jaxbWriteXml(T pojo) {
StringWriter out = null;
String xmlStr = null;
try {
JAXBContext context = JAXBContext.newInstance(pojo.getClass());
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
out = new StringWriter();
marshaller.marshal(pojo, out);
xmlStr = out.toString();
// System.out.println(xmlStr);
} catch (Exception e) {
e.printStackTrace();
logger.error("----对象转xml出错："+e.getMessage());
} finally {
if (out != null) {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return xmlStr;
}