SAX解析和特殊字符 [英] SAX parsing and special characters
本文介绍了SAX解析和特殊字符的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想使用SAX解析器从xml文件解析一些数据。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:
Why is this happening instead of getting:
cat 1 = Pies & past
cat 2 = Fruits
推荐答案
我的猜测是,您将每次调用字符
视为提供 cat
元素的完整文本。您应该对处理程序进行编码,以便连续调用字符
累积文本,并且只在 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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