參考：

https://blog.csdn.net/LookForDream_/article/details/88884316

https://zhuchengzzcc.iteye.com/blog/1838702

核心代碼

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轉換成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轉換成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;} }

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實體類

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;}@Overridepublic String toString() {return "SlaveEntity [host=" + host + ", userName=" + userName + ", port=" + port + ", remoteResultPath="+ remoteResultPath + "]";} }

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轉載于:https://www.cnblogs.com/yanghaolie/p/11110991.html

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