XMLEncoder：
将對象寫入XML資料中
import org.dom4j.DocumentException;
import java.beans.XMLEncoder;
import java.io.*;
public class Demo{
public static void main(String[] args) throws IOException, DocumentException {
xmlEncoder();
}
//将對象寫入XML文檔中
private static void xmlEncoder() throws DocumentException, FileNotFoundException {
BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream("test.xml"));
XMLEncoder xmlEncoder = new XMLEncoder(bufferedOutputStream);
//執行個體化的類必須是public 否則會報錯
Person person = new Person();
person.setAge("10");
person.setName("bin");
person.setId("p0");
xmlEncoder.writeObject(person);
xmlEncoder.close();
}
}
對象必須有public
public class Person {
private String name;
private String age;
private String id;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
", id='" + id + '\'' +
'}';
}
}
XMLDecoder：
import org.dom4j.DocumentException;
import java.beans.XMLDecoder;
import java.io.*;
public class Demo {
public static void main(String[] args) throws IOException, DocumentException {
xmlEncoder();
}
//将對象從XML文檔中讀出來
private static void xmlEncoder() throws DocumentException, FileNotFoundException {
BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream("test.xml"));
XMLDecoder xmlDncoder = new XMLDecoder(bufferedInputStream);
Person perosn = (Person) xmlDncoder.readObject();
System.out.println(perosn.getAge());
System.out.println(perosn.getName());
System.out.println(perosn.getId());
xmlDncoder.close();
}
}
xStream工具使用：
适合用作資料傳輸
下載下傳xSream jar包
http://x-stream.github.io/download.html
下載下傳依賴包 xpp3 jar包
http://www.extreme.indiana.edu/dist/java-repository/xpp3/distributions/
使用執行個體
做資料傳輸
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.Xpp3Driver;
public class Demo {
public static void main(String[] args){
//适合用作資料傳輸
xStream();
}
private static void xStream(){
//生成xml資料
XStream xStream = new XStream(new Xpp3Driver());
//設定安全，不然會出現警告 Security framework of XStream not initialized, XStream is probably vulnerable
XStream.setupDefaultSecurity(xStream);
xStream.allowTypes(new Class[]{Person.class, Person.class});
Person person = new Person();
person.setId("p1");
person.setName("花花");
person.setAge("10");
//取别名
xStream.alias("person",Person.class);
//别名的屬性用id來設定
xStream.useAttributeFor(Person.class,"id");
String xml = xStream.toXML(person);
System.out.println(xml);
//解析xml資料
Person person1 = (Person) xStream.fromXML(xml);
System.out.println(person1);
}
}
利用xStream讀取XML和寫入XML
public class ProductClothesXML {
public static List parseclothesXML() {
List clothesList = new ArrayList<>();
XStream xStream = new XStream(new Xpp3Driver());
xStream.alias("list", clothesList.getClass());
xStream.alias("cloth", Clothes.class);
xStream.useAttributeFor(Clothes.class, "id");
BufferedInputStream bufferedInputStream = null;
try {
bufferedInputStream = new BufferedInputStream(new FileInputStream("cloth.xml"));
clothesList = (List) xStream.fromXML(bufferedInputStream);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return clothesList;
}
public static void writeClothesXML(List clothesList) {
XStream xStream = new XStream(new Xpp3Driver());
xStream.alias("list", clothesList.getClass());
xStream.alias("cloth", Clothes.class);
xStream.useAttributeFor(Clothes.class, "id");
BufferedOutputStream bufferedOutputStream = null;
try {
bufferedOutputStream = new BufferedOutputStream(new FileOutputStream("cloth.xml"));
bufferedOutputStream.write("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>".getBytes());
xStream.toXML(clothesList, bufferedOutputStream);
xStream.getClassLoader();
bufferedOutputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
cloth.xml
adidas
白色
s
10
100
棉
adidas
黑色
s
20
100
棉
adidas
黑色
M
20
500
運動
Clothes類
public class Clothes implements Serializable {
private String id;
private String brand;
private String style;
private String color;
private String size;
private int num;
private float price;
private String description;
set...
get...
}