XStream隱式集合混疊

隱式集合混疊時(shí)使用的集合是表示在XML無需顯示根。例如，在我們的例子中，我們需要一個(gè)接一個(gè)，但不是在根節(jié)點(diǎn)來顯示每一個(gè)節(jié)點(diǎn)。讓我們再次修改例子，下面的代碼添加到它。

xstream.addImplicitCollection(Student.class, "notes");

讓我們使用XStream測試上述對象序列化。

創(chuàng)建一個(gè)Java類名為XStreamTester在文件 C:\>XStream_WORKSPACE\com\yiibai\xstream.

File: XStreamTester.java

package com.yiibai.xstream;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.List;

import javax.xml.transform.OutputKeys;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.stream.StreamResult;

import org.xml.sax.InputSource;

import com.thoughtworks.xstream.XStream;
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.alias("student", Student.class);
      xstream.alias("note", Note.class);
      xstream.aliasField("name", Student.class, "studentName");
      xstream.addImplicitCollection(Student.class, "notes");
      Student student = tester.getStudentDetails();
      //Object to XML Conversion
      String xml = xstream.toXML(student);
      System.out.println(formatXml(xml));		
   }	

   private Student getStudentDetails(){
      Student student = new Student("Mahesh");
      student.addNote(new Note("first","My first assignment."));
      student.addNote(new Note("second","My Second assignment."));
      return student;
   }

   public static String formatXml(String xml){
      try{
         Transformer serializer= SAXTransformerFactory.newInstance().newTransformer();
         serializer.setOutputProperty(OutputKeys.INDENT, "yes");
         serializer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
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