前几个月,做项目时整理过一些XML操作的程序。这里根据自己的编程习惯再做一下整理。XML操作最基本的是SAX,DOM了。但这里不是谈SAX,DOM怎么使用。而是从XML元素的角度谈其java的实现。XML是由多个元素组成,可以分成XMLElement、XMLSimpleElement、XMLComplexElement、XMLCollection、XMLCollectionElement等几种基本类型,从类名你基本就可以判断出该类所描述的XML对象了。
下面以一个例子来做描述:
<?xml version="1.0" encoding="GB2312"?>
<Package name = "abc">
<File name = "file">
<Sheet name = "sheet">
<Styles>
<style id = "0" name = "a">
<align>2</align>
<borders>
<border id = "0" type = "left" value = "1" />
<border id = "1" type = "right" value = "3" />
</borders>
<font name = "宋体" color = "3" height = "20" />
</style>
</Styles>
<Columns>
<Column id = "0" columnid = "0" width = "10" />
</Columns>
<Regions>
<Region id = "0" rowid = "1" columnform = "0" columnto = "3" />
</Regions>
<Cells>
<cell id = "1" row="0" column = "0" style = "a" value ="测试"/>
<cell id = "2" row="2" column = "2" value =" 测试2" />
</Cells>
</Sheet>
</File>
</Package>
该配置文件是个XML—>EXCEL的XML文件,描述了EXCEL中的一些对象,比如文件名,字体,行,列等。其中Package是一个XMLComplexElement(混合类型),Cells(单元格集)是个XMLCollection(容器类),cell (单元格)是XMLCollectionElement(容器中的元素)<cell id = "1" row="0" column = "0" style = "a" value ="测试"/>
中的id 就是XMLAttribute(属性)。所有的XML文件都是由这些基本的元素组成。定义出最基本的XML元素后,那么在程式中怎么也把它们之间的关系定义出来呢?以cell元素为例子代码如下:
public class Cell extends XMLCollectionElement {
private XMLAttribute attrRow=new XMLAttribute("row");
private XMLAttribute attrStyle=new XMLAttribute("style");
private XMLAttribute attrColumn=new XMLAttribute("column");
private XMLAttribute attrValue=new XMLAttribute("value");
private XMLInterface xmlInterface = null ;
public Cell (Cells ass) {
super(ass);
fillStructure();
}
protected void fillStructure() {
super.fillStructure();
attrId.setReadOnly(true);
isRequired=true;
complexStructure.add(attrStyle);
complexStructure.add(attrRow);
complexStructure.add(attrColumn);
complexStructure.add(attrValue);
}
}
源代码下载 http://www.51sports.org/xml.rar