利用XStream在Java对象和XML之间相互转换

最近因项目需要把java对象转换为xml格式的字符串，在网上

XStream是个好东西，可以方便在Java对象和XML之间相互转换，效率和可读性都非常高，下面是我写的一个测试的例子，放出来一块看看。

需要的jar包如下：

xpp3_min-1.1.4c.jar
xstream-1.3.jar

目标：将Persons对象转换xml，再将xml转化为Persons对象。

实现源码列表：

package com.lavasoft.demo3;

import com.thoughtworks.xstream.XStream;

import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.io.StringReader;
import java.io.FileReader;
import java.io.File;
import java.io.FileNotFoundException;

import org.dom4j.io.SAXReader;
import org.dom4j.Document;
import org.dom4j.Node;
import org.dom4j.DocumentException;

/**
* Created by IntelliJ IDEA.
* File: demo3.java
* User: leizhimin
* Date: 2008-3-4 14:44:03
*/
public class XStreamDemo {
    public static void main(String args[]) {
        testBean2XML();
    }

    /**
     * 生成一个Persons对象
     *
     * @return Persons对象
     */
    public static Persons getPersons() {
        Address add1 = new Address( "type1", "郑州市经三路财富广场1");
        Address add2 = new Address( "type2", "郑州市经三路财富广场2");
        List<Address> addlist1 = new ArrayList<Address>();
        addlist1.add(add1);
        addlist1.add(add2);

        Address add3 = new Address( "type3", "郑州市经三路财富广场3");
        Address add4 = new Address( "type4", "郑州市经三路财富广场4");
        List<Address> addlist2 = new ArrayList<Address>();
        addlist2.add(add3);
        addlist2.add(add4);

        Addresses addes1 = new Addresses(addlist1);
        Addresses addes2 = new Addresses(addlist2);
        Person person1 = new Person(addes1, "6666554", "lavasoft", "man");
        Person person2 = new Person(addes2, "7777754", "yutian", "man");

        List<Person> listPerson = new ArrayList<Person>();
        listPerson.add(person1);
        listPerson.add(person2);
        Persons persons = new Persons(listPerson, "001");
        return persons;
    }

    /**
     * 利用XStream在Java对象和XML之间相互转换
     */
    public static void testBean2XML() {
        System.out.println( "将Java对象转换为xml！\n");
        Persons persons = getPersons();
        XStream xstream = new XStream();
        xstream.alias( "address", Address. class);
        xstream.alias( "addresses", Addresses. class);
        xstream.alias( "person", Person. class);
        xstream.alias( "persons", Persons. class);
        String xml = xstream.toXML(persons);
        System.out.println(xml);

        System.out.println( "\n将xml转换为Java对象！");
        Persons cre_person = (Persons) xstream.fromXML(xml);
        System.out.println(cre_person.toString());
    }
}

public class Persons {
    private String type;
    private List<Person> listPerson;

    public Persons(List<Person> listPerson, String type) {
        this.listPerson = listPerson;
        this.type = type;
    }

    public String getType() {
        return type;
    }

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

    public List<Person> getListPerson() {
        return listPerson;
    }

    public void setListPerson(List<Person> listPerson) {
        this.listPerson = listPerson;
    }

    public String toString() {
        StringBuffer sb= new StringBuffer();
        for(Iterator it=listPerson.iterator();it.hasNext();){
            Person p=(Person)it.next();
            sb.append(it.toString());
        }
        return "Persons{" +
                "type='" + type + '\'' +
                ", listPerson=" + sb.toString() +
                "}\n";
    }
}

public class Person {
    private String name;
    private String sex;
    private String tel;
    private Addresses addes;

    public Person(Addresses addes, String name, String sex, String tel) {
        this.addes = addes;
        this.name = name;
        this.sex = sex;
        this.tel = tel;
    }

    public Addresses getAddes() {
        return addes;
    }

    public void setAddes(Addresses addes) {
        this.addes = addes;
    }

    public String getName() {
        return name;
    }

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

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getTel() {
        return tel;
    }

    public void setTel(String tel) {
        this.tel = tel;
    }

    public String toString() {
        return "Person{" +
                "addes=" + addes.toString() +
                ", name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                ", tel='" + tel + '\'' +
                "}\n";
    }
}

public class Addresses {
    private List<Address> listAdd;

    public Addresses(List<Address> listAdd) {
        this.listAdd = listAdd;
    }

    public List<Address> getListAdd() {
        return listAdd;
    }

    public void setListAdd(List<Address> listAdd) {
        this.listAdd = listAdd;
    }

    public String toString() {
        StringBuffer sb= new StringBuffer();
        for(Iterator it=listAdd.iterator();it.hasNext();){
            Address add=(Address)it.next();
            sb.append(add.toString());
        }
        return "Addresses{" +
                "listAdd=" + sb.toString() +
                "}\n";
    }
}

public class Address {
    private String addType;
    private String place;

    public Address(String addType, String place) {
        this.addType = addType;
        this.place = place;
    }

    public String getAddType() {
        return addType;
    }

    public void setAddType(String addType) {
        this.addType = addType;
    }

    public String getPlace() {
        return place;
    }

    public void setPlace(String place) {
        this.place = place;
    }


    public String toString() {
        return "Address{" +
                "addType='" + addType + '\'' +
                ", place='" + place + '\'' +
                "}\n";
    }
}

运行测试类XStreamDemo，打印出结果：

将Java对象转换为xml！

< persons >
  < type >001 </ type >
  < listPerson >
    < person >
      < name >6666554 </ name >
      < sex >lavasoft </ sex >
      < tel >man </ tel >
      < addes >
        < listAdd >
          < address >
            < addType >type1 </ addType >
            < place >郑州市经三路财富广场1 </ place >
          </ address >
          < address >
            < addType >type2 </ addType >
            < place >郑州市经三路财富广场2 </ place >
          </ address >
        </ listAdd >
      </ addes >
    </ person >
    < person >
      < name >7777754 </ name >
      < sex >yutian </ sex >
      < tel >man </ tel >
      < addes >
        < listAdd >
          < address >
            < addType >type3 </ addType >
            < place >郑州市经三路财富广场3 </ place >
          </ address >
          < address >
            < addType >type4 </ addType >
            < place >郑州市经三路财富广场4 </ place >
          </ address >
        </ listAdd >
      </ addes >
    </ person >
  </ listPerson >
</ persons >

将xml转换为Java对象！
Persons{type='001', listPerson=java.util.AbstractList$ [email protected]$Itr@1cde100}


Process finished with exit code 0

查了一下资料，很多人说用json技术，但试了好几次我都没成功，后来找到xstream技术，接下来和大家一起分享