Java XML 序列化和反序列化

Utils 类:

 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileWriter;
 import java.io.InputStreamReader;
 import java.io.Serializable;
 import java.io.UnsupportedEncodingException;

 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import javax.xml.bind.Unmarshaller;

 /**
  * Created by Leo on 2017/2/10.
  */
 public class XmlUtils {
     @SuppressWarnings({ "unchecked", "rawtypes" })
     public static <T extends Serializable> T deserialize(String xmlFilePath, Class clazz)
             throws FileNotFoundException, JAXBException, UnsupportedEncodingException {
         JAXBContext context = JAXBContext.newInstance(clazz);
         Unmarshaller unmarshal = context.createUnmarshaller();
         FileInputStream fis = new FileInputStream(xmlFilePath);
         InputStreamReader isr = new InputStreamReader(fis, "UTF-8");
         return (T) unmarshal.unmarshal(isr);
     }

     public static <T> void serialize(T obj, String xmlFilePath) {
         FileWriter writer = null;
         try {
             JAXBContext context = JAXBContext.newInstance(obj.getClass());
             Marshaller marshal = context.createMarshaller();
             marshal.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
             marshal.marshal(obj, System.out);
             writer = new FileWriter(xmlFilePath);
             marshal.marshal(obj, writer);
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

 }

根目录对应的类：

 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlRootElement;
 import java.io.Serializable;
 import java.util.*;

 /**
  * Created by Leo on 2017/2/10.
  */
 @XmlRootElement(name = "WorkflowProcesses")
 public class WorkflowProcessList implements Serializable {

     @XmlElement(name = "WorkflowProcess")
     private List<WorkflowProcess> items;

     public WorkflowProcessList() {
         this.items = new ArrayList<WorkflowProcess>();
     }

     public void addProcess(WorkflowProcess process) {
         this.items.add(process);
     }

     public Iterator<WorkflowProcess> iterator() {
         return items.iterator();
     }

     public List<WorkflowProcess> getItems() {
         return this.items;
     }

 }

子类：

 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;

 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlAttribute;
 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlElementWrapper;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;

 @XmlType(propOrder = { "id", "name", "activities", "transitions" })
 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlRootElement(name = "wp")
 public class WorkflowProcess implements Serializable {

     @XmlAttribute(name = "Id")
     private String id;

     @XmlAttribute(name = "Name")
     private String name;

     @XmlElementWrapper(name = "Activities")
     @XmlElement(name = "Activity")
     private List<Activity> activities;

     @XmlElementWrapper(name = "Transitions")
     @XmlElement(name = "Transition")
     private List<Transition> transitions;

     public WorkflowProcess() {
         this.activities = new ArrayList<Activity>();
         this.transitions = new ArrayList<Transition>();
     }

     public String getName() {
         return this.name;
     }

     public void setName(String value) {
         this.name = value;
     }

     public String getId() {
         return this.id;
     }

     public void setId(String value) {
         this.id = value;
     }

     public void addActivity(Activity activity) {
         this.activities.add(activity);
     }

     public List<Activity> getActivities() {
         return this.activities;
     }

     public List<Transition> getTransitions() {
         return this.transitions;
     }

 }

子类2：

 import java.io.Serializable;

 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlAttribute;
 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;

 /**
  * Created by Leo on 2017/2/10.
  */
 @XmlType(name = "Activity", propOrder = { "id", "type", "name", "width", "height", "coordinate" })
 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlRootElement
 public class Activity implements Serializable {

     @XmlAttribute(name = "Id")
     private String id;

     @XmlAttribute(name = "Type")
     private String type;

     @XmlAttribute(name = "Name")
     private String name;

     @XmlAttribute(name = "Width")
     private int width;

     @XmlAttribute(name = "Height")
     private int height;

     @XmlElement(name = "Coordinates")
     private Coordinate coordinate;

     public Activity() {

     }

     public Activity(String id, String type, String name) {
         this.id = id;
         this.type = type;
         this.name = name;
     }

     public String getId() {
         return this.id;
     }

     public void setId(String value) {
         this.id = value;
     }

     public String getType() {
         return this.type;
     }

     public void setType(String value) {
         this.type = value;
     }

     public String getName() {
         return this.name;
     }

     public void setName(String value) {
         this.name = value;
     }

     public Coordinate getCoordinate() {
         return this.coordinate;
     }

     public void setCoordinate(Coordinate value) {
         this.coordinate = value;
     }

     public int getWidth() {
         return this.width;
     }

     public void setWidth(int value) {
         this.width = value;
     }

     public int getHeight() {
         return this.height;
     }

     public void setHeight(int value) {
         this.height = value;
     }

 }

子类3：

 import javax.xml.bind.annotation.XmlAccessType;
 import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlAttribute;
 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;

 /**
  * Created by Leo on 2017/2/10.
  */
 @XmlType(name = "Transition", propOrder = { "id", "from", "to", "name", "coordinate" })
 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlRootElement()
 public class Transition {

     @XmlAttribute(name = "Id")
     private String id;

     @XmlAttribute(name = "From")
     private String from;

     @XmlAttribute(name = "To")
     private String to;

     @XmlAttribute(name = "Name")
     private String name;

     @XmlElement(name = "Coordinates")
     private Coordinate coordinate;

     public String getId() {
         return this.id;
     }

     public void setId(String value) {
         this.id = value;
     }

     public String getFrom() {
         return this.from;
     }

     public void setFrom(String value) {
         this.from = value;
     }

     public String getTo() {
         return this.to;
     }

     public void setTo(String value) {
         this.to = value;
     }

     public String getName() {
         return this.name;
     }

     public void setName(String value) {
         this.name = value;
     }

     public Coordinate getCoordinate() {
         return this.coordinate;
     }

     public void setCoordinate(Coordinate value) {
         this.coordinate = value;
     }

 }