参考:
https://blog.csdn.net/LookForDream_/article/details/88884316
https://zhuchengzzcc.iteye.com/blog/1838702
核心代码
import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.StringReader; import java.io.StringWriter; import javax.xml.bind.JAXBContext; import javax.xml.bind.Marshaller; import javax.xml.bind.Unmarshaller; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import dns.rsdnscount.entity.SlaveEntity; import dns.rsdnscount.entity.SlavesEntity; public class XmlUtils { private static Logger logger = LoggerFactory.getLogger(XmlUtils.class); public static void main(String[] args) { /* SlavesEntity list=new SlavesEntity(); SlaveEntity ent=new SlaveEntity(); ent.setHost("master"); ent.setPort("3306"); ent.setUserName("user1"); ent.setRemoteResultPath("/home/user"); list.getEntitys().add(ent); SlaveEntity ent2=new SlaveEntity(); ent2.setHost("master2"); ent2.setPort("3306"); ent2.setUserName("user2"); ent2.setRemoteResultPath("/home/user2"); list.getEntitys().add(ent2); String xxx=convertToXml(list,"utf-8",true); System.out.println(xxx);*/ try { SlavesEntity ents=convertToJava(new File("conf/slaves.xml"), SlavesEntity.class); for (SlaveEntity ent : ents.getEntityList()) { System.out.println(ent); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * JavaBean转换成xml * * @param obj * @param encoding * @return */ public static String convertToXml(Object obj, String encoding, boolean format) { String result = null; StringWriter writer = null; try { JAXBContext context = JAXBContext.newInstance(obj.getClass()); Marshaller marshaller = context.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, format); marshaller.setProperty(Marshaller.JAXB_ENCODING, encoding); writer = new StringWriter(); marshaller.marshal(obj, writer); result = writer.toString(); } catch (Exception e) { logger.error(e.getMessage(), e); } finally { if (writer != null){ try { writer.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } /** * xml转换成JavaBean * * @param xml * @param c * @return */ @SuppressWarnings("unchecked") public static <T> T convertToJava(String xml, Class<T> c) { if (xml == null || xml.equals("")) return null; T t = null; StringReader reader = null; try { JAXBContext context = JAXBContext.newInstance(c); Unmarshaller unmarshaller = context.createUnmarshaller(); reader = new StringReader(xml); t = (T) unmarshaller.unmarshal(reader); } catch (Exception e) { logger.error(e.getMessage(), e); } finally { if (reader != null) reader.close(); } return t; } @SuppressWarnings("unchecked") public static <T> T convertToJava(File filePath, Class<T> c) throws IOException { if (!filePath.exists()) return null; T t = null; FileReader reader = null; try { JAXBContext context = JAXBContext.newInstance(c); Unmarshaller unmarshaller = context.createUnmarshaller(); reader = new FileReader(filePath); t = (T) unmarshaller.unmarshal(reader); } catch (Exception e) { logger.error(e.getMessage(), e); } finally { if (reader != null) reader.close(); } return t; } }
实体类
import java.util.LinkedList; import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlElementWrapper; import javax.xml.bind.annotation.XmlRootElement; @XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name="slavesList") public class SlavesEntity{ @XmlElementWrapper(required=true,name="entitys") @XmlElement(name="entity") LinkedList<SlaveEntity> entityList=new LinkedList<SlaveEntity>(); public LinkedList<SlaveEntity> getEntityList() { return entityList; } public void setEntityList(LinkedList<SlaveEntity> entityList) { this.entityList = entityList; } }
import javax.xml.bind.annotation.XmlAccessType; import javax.xml.bind.annotation.XmlAccessorType; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlType; @XmlAccessorType(XmlAccessType.FIELD) @XmlType(propOrder = { "host", "port", "userName", "remoteResultPath", }) public class SlaveEntity { String host; String userName; String port; @XmlElement(required=false,name="remoteResultPath") String remoteResultPath; public String getHost() { return host; } public void setHost(String host) { this.host = host; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getPort() { return port; } public void setPort(String port) { this.port = port; } public String getRemoteResultPath() { return remoteResultPath; } public void setRemoteResultPath(String remoteResultPath) { this.remoteResultPath = remoteResultPath; } @Override public String toString() { return "SlaveEntity [host=" + host + ", userName=" + userName + ", port=" + port + ", remoteResultPath=" + remoteResultPath + "]"; } }