XStream將XML映射到對對象

<?xml version="1.0" encoding="UTF-8"?>
<address-book>

</contacts>
</address-book>

這樣格式的xml我相信大家都會讀寫，然而如果是下面這種情況呢？

<?xml version="1.0" encoding="UTF-8"?>
<address-book>
    <contact id="01" type="家庭" >
        <name>張三</name>
        <address>黃山路666號</address>
        <city>阜陽</city>
        <province>安徽</province>
        <postalcode>236000</postalcode>
        <country>中國</country>
        <telephone>18056075816</telephone>
</contact>
<contact id="02" type="商務" >
        <name>李四</name>
        <address>望江西路888號</address>
        <city>合肥</city>
        <province>安徽</province>
        <postalcode>230091</postalcode>
        <country>中國</country>
        <telephone>13956921922</telephone>
</contact>
<contact id="03" type="同學" >
        <name>王五</name>
        <address>民主路3號</address>
        <city>貴港市</city>
        <province>廣西</province>
        <postalcode>537111</postalcode>
        <country>中國</country>
        <telephone>13965131384</telephone>
</contact>
</address-book>
下面我將給出具體的讀寫和修改的代碼：

新建一個Contact.class

import java.io.Serializable;

import com.thoughtworks.xstream.annotations.XStreamAsAttribute;

public class Contact implements Serializable{
@XStreamAsAttribute
private String id;//xml中的屬性需要添加註釋
@XStreamAsAttribute
private String type;//xml中的屬性需要添加註釋
private String name;
private String address;
private String city;
private String province;
private String postalcode;
private String country;
private String telephone;

public String getId() {
return id;
}

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

public String getType() {
return type;
}

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

public String getName() {
return name;
}

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

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}

public String getCity() {
return city;
}

public void setCity(String city) {
this.city = city;
}

public String getProvince() {
return province;
}

public void setProvince(String province) {
this.province = province;
}

public String getPostalcode() {
return postalcode;
}

public void setPostalcode(String postalcode) {
this.postalcode = postalcode;
}

public String getCountry() {
return country;
}

public void setCountry(String country) {
this.country = country;
}

public String getTelephone() {
return telephone;
}

public void setTelephone(String telephone) {
this.telephone = telephone;
}

@Override
public String toString() {
  return "id=" + id + ", type=" + type + ", name=" + name + ", address="
    + address + ", city=" + city + ", province=" + province
    + ", postalcode=" + postalcode + ", country=" + country
    + ", telephone=" + telephone;
}

}

新建一個Address.class

import java.util.List;

import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.annotations.XStreamImplicit;
@XStreamAlias(value="address-book")
public class Address {
@XStreamImplicit(itemFieldName="contact")
private List<Contact> address;

public List<Contact> getAddress() {
return address;
}

public void setAddress(List<Contact> address) {
this.address = address;
}

}

新建一個Test.class

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.List;
import java.util.Scanner;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

public class Test {
public static void main(String[] args) {
Test t=new Test();
Address address=t.readXml();
System.out.println("輸入id編號,從XML文件中查找聯繫人，聯繫人信息:");
Scanner sc=new Scanner(System.in);
String line=sc.nextLine();
List<Contact> list=address.getAddress();
for (Contact contact : list) {
  if(contact.getId().equals(line)){
   System.out.println(contact);
  }
}
System.out.println("將編號爲02的聯繫人的姓名和類型修改爲用戶輸入的信息（格式如：趙六,單位），並保存到XML文件中。");
String info=sc.nextLine();
Address add=t.paresInfo(address,info);
t.write(add);
}
private Address paresInfo(Address address, String info) {
String[] infos=info.split(",");
List<Contact> list=address.getAddress();
for (Contact contact : list) {
  if(contact.getId().equals("02")){
   contact.setName(infos[0]);
   contact.setType(infos[1]);
  }
}
return address;

}
private void write(Address address) {

try {
  XStream xs=new XStream(new DomDriver());
  xs.processAnnotations(Address.class);
  OutputStreamWriter osw=new FileWriter(new File("a.xml"));
  xs.toXML(address, osw);
} catch (IOException e) {
  e.printStackTrace();
}
}
public Address readXml(){
XStream xs=new XStream(new DomDriver());
xs.processAnnotations(Address.class);
InputStreamReader isr=null;
try {
  isr = new FileReader(new File("E:\\workspace\\Day24\\src\\PeopleMessage.xml"));
} catch (FileNotFoundException e) {
  e.printStackTrace();
}
Address address=(Address) xs.fromXML(isr);
String xml=xs.toXML(address);
System.out.println(xml);
return address;
}
}