Jaxb工具类
package com.apusic.esb.util.jaxb;import java.io.ByteArrayInputStream;import java.io.File;import java.io.InputStream;import java.io.StringWriter;import java.io.UnsupportedEncodingException;import java.util.HashMap;import java.util.Map;import java.util.concurrent.ConcurrentHashMap;import javax.xml.bind.JAXBContext;import javax.xml.bind.JAXBException;import javax.xml.bind.Marshaller;import javax.xml.bind.Unmarshaller;import org.eclipse.core.resources.IFile;import org.eclipse.core.runtime.CoreException;import org.eclipse.core.runtime.NullProgressMonitor;import com.apusic.esb.util.UtilPlugin;/** * JAXB工具，通过使用注解，实现java对象与XML文件的相互转换 * @author TigerlChen */public class JaxbUtil {private static ConcurrentHashMap<Class<?>, JAXBContext> jaxbContextMap = new ConcurrentHashMap<Class<?>,JAXBContext>();/** * 将JAXB实现对象转换成XML格式的字符串 * @param <T> 这里的类是具体类，不能是接口 * @param tclz 转换对象实例 * @return */ public static <T> String marshToXmlBinding(Class<T> tclz,T t) throws JAXBException { JAXBContext jc = null; if(jaxbContextMap.get(tclz)==null) { Map<String, String> properties = new HashMap<String, String>(); jc = JAXBContext.newInstance(new Class<?>[]{tclz},properties); jaxbContextMap.put(tclz, jc); }else{ jc = jaxbContextMap.get(tclz); } Marshaller u = jc.createMarshaller(); // XML内容格式化 u.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); StringWriter sw = new StringWriter (); u.marshal(t, sw); return sw.toString(); } /** * 将XML格式的字符串转换成JAXB实现对象 * @param <T> 这里的类是具体类，不能是接口 * @param tclz * @param file 当目录存在文件不存在时，自动创建；当目录不存在时，将抛异常 * @return */ public static <T> void marshToXmlBinding(Class<T> tclz, T t, File file) throws JAXBException { if (tclz == null || file == null) { return ; } JAXBContext jc = null; if (jaxbContextMap.get(tclz) == null) { Map<String, String> properties = new HashMap<String, String>(); jc = JAXBContext.newInstance(new Class<?>[] {tclz}, properties); jaxbContextMap.put(tclz, jc); } else { jc = jaxbContextMap.get(tclz); } Marshaller u = jc.createMarshaller(); u.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); u.marshal(t, file); } public static <T> void marshToXmlBinding(Class<T> tclz, T t, IFile file) throws JAXBException { String str = marshToXmlBinding(tclz, t); ByteArrayInputStream stream = null; try { stream = new ByteArrayInputStream(str.getBytes("UTF8")); if (!file.exists()) { file.create(stream, true, new NullProgressMonitor()); } else { file.setContents(stream, true, false, new NullProgressMonitor()); } } catch (CoreException e) { UtilPlugin.log(e); } catch (UnsupportedEncodingException e) { UtilPlugin.log(e); } } /** * 将XML格式的字符串转换成JAXB实现对象 * @param <T> 这里的类是具体类，不能是接口 * @param tclz * @param xmlstr * @return */ @SuppressWarnings("unchecked") public static <T> T unmarshToObjBinding(Class<T> tclz,String xmlstr) { try { JAXBContext jc = null; if(jaxbContextMap.get(tclz)==null) { Map<String, String> properties = new HashMap<String, String>(); jc = JAXBContext.newInstance(new Class<?>[]{tclz},properties); jaxbContextMap.put(tclz, jc); }else{ jc = jaxbContextMap.get(tclz); } Unmarshaller un = jc.createUnmarshaller(); return (T) un.unmarshal(new ByteArrayInputStream(xmlstr.getBytes("utf-8"))); } catch (JAXBException e) { UtilPlugin.log(e); } catch (UnsupportedEncodingException e) { UtilPlugin.log(e);}return null; } /** * 将XML格式的文件转换成JAXB实现对象 * @param <T> * @param tclz * @param file * @return */ @SuppressWarnings("unchecked") public static <T> T unmarshToObjBinding(Class<T> tclz,File file) { if (tclz == null || file == null || !file.exists()) { return null; } try { JAXBContext jc = null; if(jaxbContextMap.get(tclz)==null) { Map<String, String> properties = new HashMap<String, String>(); jc = JAXBContext.newInstance(new Class<?>[]{tclz},properties); jaxbContextMap.put(tclz, jc); }else{ jc = jaxbContextMap.get(tclz); } Unmarshaller un = jc.createUnmarshaller(); return (T) un.unmarshal(file); } catch (JAXBException e) { UtilPlugin.log(e); } return null; } @SuppressWarnings("unchecked") public static <T> T unmarshToObjBinding(Class<T> tclz,InputStream inputStream) { if (tclz == null || inputStream == null) { return null; } try { JAXBContext jc = null; if(jaxbContextMap.get(tclz)==null) { Map<String, String> properties = new HashMap<String, String>(); jc = JAXBContext.newInstance(new Class<?>[]{tclz},properties); jaxbContextMap.put(tclz, jc); }else{ jc = jaxbContextMap.get(tclz); } Unmarshaller un = jc.createUnmarshaller(); return (T) un.unmarshal(inputStream); } catch (JAXBException e) { UtilPlugin.log(e); } return null; } public static <T> T unmarshToObjBinding(Class<T> tclz, IFile file) { return unmarshToObjBinding(tclz, file.getLocation().toFile()); }}?