我想使用 SAX 解析器从 xml 文件中解析一些数据.我的xml如下:
I want to parse some data from an xml file using SAX parser. My xml is as follows:
<categories>
<cat>Pies & past</cat>
<cat>Fruits</cat>
</categories>
为了解析这些数据,我扩展了 DefaultHandler.
In order to parse this data I extend DefaultHandler.
解析后的输出为:
cat 1 = Pies
cat 2 = &
cat 3 = past
cat 4 = Fruits
为什么会发生这种情况而不是得到:
Why is this happening instead of getting:
cat 1 = Pies & past
cat 2 = Fruits
我的猜测是,您将对 characters
的每次调用都视为为 cat
提供完整的文本元素.您应该对处理程序进行编码,以便对 characters
的连续调用累积文本,并且仅在 endElement
事件中捕获它:
My guess is that you are treating each call to characters
as delivering the complete text for a cat
element. You should code your handler so that successive calls to characters
accumulate the text, and you only capture it on the endElement
event:
public class CatHandler extends DefaultHandler {
private StringBuilder chars = new StringBuilder();
public void startElement(String uri, String lName, String qName, Attributes a)
{
final String name = qName == null ? lName : qName;
if ("cat".equals(name)) {
chars.setLength(0);
} else . . .
}
public void endElement(String uri, String lName, String qName) {
final String name = qName == null ? lName : qName;
if ("cat".equals(name)) {
String catName = chars.toString();
// do something with cat name
} else . . .
}
public void characters(char[] ch, int start, int length) {
chars.append(ch, start, length);
}
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