参考：

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 convertToJava(String xml, Class 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 convertToJava(File filePath, Class 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 entityList=new LinkedList();

public LinkedList getEntityList() {

return entityList;

}

public void setEntityList(LinkedList 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 + "]";

}

}

来源：https://www.cnblogs.com/yanghaolie/p/11110991.html