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;
    }

}