XML的操作——JAXB进行Java对象和XML之间的转换

JAXB(Java Architecture for XML Binding)是一种特殊的序列化/反序列化工具，可实现Java对象与XML的相互转换。@H_502_1@ 在JAXB中将一个Java对象——>XML的过程称之为Marshal，XML——>Java对象的过程称之为UnMarshal。

@XmlRootElement@H_502_1@ public class SClass@H_502_1@ {@H_502_1@ @H_404_8@private String cnum;@H_502_1@ @H_404_8@private List<Student> students;@H_502_1@ @H_404_8@public SClass()@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@super();@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ @H_404_8@public SClass(String cnum,List<Student> students)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@super();@H_502_1@ @H_404_8@this.cnum = cnum;@H_502_1@ @H_404_8@this.students = students;@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@@H_502_1@ @H_404_8@public String getCnum()@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@return cnum;@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@public void setCnum(String cnum)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@this.cnum = cnum;@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@public List<Student> getStudents()@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@return students;@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@public void setStudents(List<Student> students)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@this.students = students;@H_502_1@ @H_404_8@}@H_404_8@ @H_502_1@ }@H_502_1@ @H_502_1@ @H_502_1@ public class Student@H_502_1@ {@H_502_1@ @H_404_8@private String num;@H_502_1@ @H_404_8@private String name;@H_502_1@ @H_502_1@ @H_404_8@public Student()@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@super();@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ @H_404_8@public Student(String num,String name)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@super();@H_502_1@ @H_404_8@this.num = num;@H_502_1@ @H_404_8@this.name = name;@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ @H_404_8@public String getNum()@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@return num;@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ @H_404_8@public void setNum(String num)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@this.num = num;@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ @H_404_8@public String getName()@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@return name;@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ @H_404_8@public void setName(String name)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@this.name = name;@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ }@H_502_1@

public class JaxbTest@H_502_1@ {@H_502_1@ @H_404_8@@Test@H_502_1@ @H_404_8@public void test01() throws IOException@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@try@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@JAXBContext ctx = JAXBContext.newInstance(SClass.class);@H_502_1@ @H_404_8@Marshaller marshaller = ctx.createMarshaller();@H_502_1@ @H_404_8@List<Student> lstStudent = new ArrayList<Student>();@H_502_1@ @H_404_8@Student s1 = new Student("001","xy");@H_502_1@ @H_404_8@Student s2 = new Student("002","xy2");@H_502_1@ @H_404_8@lstStudent.add(s1);@H_502_1@ @H_404_8@lstStudent.add(s2);@H_502_1@ @H_404_8@SClass sclass = new SClass("c001",lstStudent);@H_502_1@ @H_502_1@ @H_404_8@// 生成的XML文件位置@H_502_1@ @H_404_8@String path = "D:/sclass.xml";@H_502_1@ @H_404_8@File file = new File(path);@H_502_1@ @H_404_8@if (!file.exists())@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@file.createNewFile();@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@// 编码格式@H_502_1@ @H_404_8@marshaller.setProperty(Marshaller.JAXB_ENCODING,"gb2312");@H_502_1@ @H_404_8@// 是否格式化生成的XML@H_502_1@ @H_404_8@marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT,true);@H_502_1@ @H_404_8@// 是否省略XML头信息<?xml version="1.0" encoding="gb2312" standalone="yes"?>@H_502_1@ @H_404_8@marshaller.setProperty(Marshaller.JAXB_FRAGMENT,true);@H_502_1@ @H_404_8@// 生成@H_502_1@ @H_404_8@marshaller.marshal(sclass,file);@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@catch (JAXBException e)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@e.printStackTrace();@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@}@H_502_1@ @H_502_1@ @H_404_8@@Test@H_502_1@ @H_404_8@public void test02() throws Exception@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@try@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@String path = "D:/sclass.xml";@H_502_1@ @H_404_8@InputStream is = new FileInputStream(path);@H_502_1@ @H_404_8@String content = IoUtils.getString(is);@H_502_1@ @H_404_8@JAXBContext ctx = JAXBContext.newInstance(SClass.class);@H_502_1@ @H_404_8@Unmarshaller um = ctx.createUnmarshaller();@H_502_1@ @H_404_8@SClass sclass = (SClass) um.unmarshal(new StringReader(content));@H_502_1@ @H_404_8@System.out.println(sclass.getCnum());@H_502_1@ @H_404_8@System.out.println(sclass.getStudents().get(1).getName());@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@catch (JAXBException e)@H_502_1@ @H_404_8@{@H_502_1@ @H_404_8@e.printStackTrace();@H_502_1@ @H_404_8@}@H_502_1@ @H_404_8@}@H_502_1@

}

test01 执行结果：对象——>XML，生成XML标签的顺序按照首字母的顺序@H_502_1@ <sClass>@H_502_1@ <cnum>c001</cnum>@H_502_1@ <students>@H_502_1@ <name>xy</name>@H_502_1@ <num>001</num>@H_502_1@ </students>@H_502_1@ <students>@H_502_1@ <name>xy2</name>@H_502_1@ <num>002</num>@H_502_1@ </students>@H_502_1@ </sClass>

@H_502_1@ test02执行结果：@H_502_1@ c001@H_502_1@ xy2

@H_502_1@

IoUtils可以参考我的博客：http://blog.csdn.net/woshixuye/article/details/13613805

XML的操作——JAXB进行Java对象和XML之间的转换

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