XStream提供了java.io.ObjectInputStream和java.io.ObjectOutputStream的替代实现,以便可以从XML序列化或反序列化对象流.当要处理大型对象集时,这一点特别有用,一次将一个对象保留在内存中.
ObjectOutputStream objectOutputStream = xstream.createObjectOutputStream( new FileOutputStream("test.txt"));
ObjectInputStream objectInputStream = xstream.createObjectInputStream( new FileInputStream("test.txt"));
现在让我们在XStream中使用对象流测试代码.
在C中创建一个名为XStreamTester的java类文件:\> XStream_WORKSPACE \ com\it1352\ xstream.
package com.it1352.xstream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import com.thoughtworks.xstream.XStream; import com.thoughtworks.xstream.annotations.XStreamAlias; import com.thoughtworks.xstream.io.xml.StaxDriver; public class XStreamTester { public static void main(String args[]) { XStreamTester tester = new XStreamTester(); XStream xstream = new XStream(new StaxDriver()); xstream.autodetectAnnotations(true); Student student1 = new Student("Mahesh","Parashar"); Student student2 = new Student("Suresh","Kalra"); Student student3 = new Student("Ramesh","Kumar"); Student student4 = new Student("Naresh","Sharma"); try { ObjectOutputStream objectOutputStream = xstream.createObjectOutputStream( new FileOutputStream("test.txt")); objectOutputStream.writeObject(student1); objectOutputStream.writeObject(student2); objectOutputStream.writeObject(student3); objectOutputStream.writeObject(student4); objectOutputStream.writeObject("Hello World"); objectOutputStream.close(); ObjectInputStream objectInputStream = xstream.createObjectInputStream( new FileInputStream("test.txt")); Student student5 = (Student)objectInputStream.readObject(); Student student6 = (Student)objectInputStream.readObject(); Student student7 = (Student)objectInputStream.readObject(); Student student8 = (Student)objectInputStream.readObject(); String text = (String)objectInputStream.readObject(); System.out.println(student5); System.out.println(student6); System.out.println(student7); System.out.println(student8); System.out.println(text); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } } } @XStreamAlias("student") class Student { private String firstName; private String lastName; public Student(String firstName, String lastName) { this.firstName = firstName; this.lastName = lastName; } public String getFirstName() { return firstName; } public String getLastName() { return lastName; } public String toString() { return "Student [ firstName: "+firstName+", lastName: "+ lastName+ " ]"; } }
使用 javac编译类编译如下 :
C:\XStream_WORKSPACE\com\it1352\xstream>javac XStreamTester.java
现在运行XStreamTester查看结果 :
C:\XStream_WORKSPACE\com\it1352\xstream>java XStreamTester
验证输出如下 :
Student [ firstName: Mahesh, lastName: Parashar ] Student [ firstName: Suresh, lastName: Kalra ] Student [ firstName: Ramesh, lastName: Kumar ] Student [ firstName: Naresh, lastName: Sharma ] Hello World
查看test.txt的内容 C:\> XStream_WORKSPACE \ com\it1352\ xstream 文件夹.
<?xml version = "1.0" ?> <object-stream> <student> <firstName>Mahesh</firstName> <lastName>Parashar</lastName> </student> <student> <firstName>Suresh</firstName> <lastName>Kalra</lastName> </student> <student> <firstName>Ramesh</firstName> <lastName>Kumar</lastName> </student> <student> <firstName>Naresh</firstName> <lastName>Sharma</lastName> </student> <string>Hello World</string> </object-stream>