java序列化与反序列化##
序列化xml
关键的几个类:
javax.xml.bind.JAXBContext
javax.xml.bind.Marshaller
Unmarshaller
需要注意的地方:
-
这些javabean(c#中的实体类)的时候,由于java没有属性需要自己写set和get方法。在写get和set方法的时候方法名称首单词get和set需要小写,否则会不识别。并且get和set只需要写一个标记就行例如:
public String getNo() { return this._depNo; } @XmlAttribute(name="班号") public void setNo(String NoString) { this._depNo=NoString; }
-
另外需要注意的是需要序列化的实体类需要加上@XmlRootElement 标记:
如:@XmlRootElement
public class department {
主要代码如下:
/**
* 由实体类转换为xml的demo
* @return
*/
public static String toXml() {
String retMsg = "success";
department d = new department();
d.setDepName("三年2班");
d.setNo("01");
try {
File file = new File("d:\\file.xml");
JAXBContext jaxbContext = JAXBContext.newInstance(department.class);
Marshaller jaxbMarshaller = jaxbContext.createMarshaller();
jaxbMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
jaxbMarshaller.marshal(d, file);
jaxbMarshaller.marshal(d, System.out);
} catch (Exception e) {
e.printStackTrace();
}
return retMsg;
}
/**
* 由xml转换为实体类demo
* @return
*/
public static department toDep() {
department d = new department();
try {
File file = new File("d:\\file.xml");
JAXBContext context = JAXBContext.newInstance(department.class);
Unmarshaller u = context.createUnmarshaller();
d = (department) u.unmarshal(file);
} catch (Exception e) {
e.printStackTrace();
}
return d;
}
Jaxb annotation
补充:在实际使用当中可能需要屏蔽掉不需要显示的属性,或者需要属性排序等。这时就需要用到Jaxb annotation
用法参见: http://blog.csdn.net/a9529lty/article/details/8232932