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<DIV class=pt10><B>8.3.2.5 输出异常</B></DIV>
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<P>每个DocumentHandler接口的方法都会产生SAXExceptions异常，但不会产生写文件时可能发生的IOExceptions异常。可是，由于SAXException可以封装其他异常，因此可以通过一个自定义的方法来处理异常。下面代码的黑体部分就是用来处理异常的函数：</P>
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<TD width="100%">public void characters (char buf [], int offset,
int Len)<BR>throws SAXException{ }<BR><BR><STRONG>private void emit
(String s)<BR>throws SAXException{<BR>try {<BR> out.write
(s);<BR> out.flush ();<BR>} catch (IOException e) {<BR>
throw new SAXException ("I/O error",
e);<BR>}<BR>}</STRONG><BR>...</TD></TR></TBODY></TABLE></CENTER></DIV>
<P>当emit方法被调用时，所有输入/输出错误都被封装在了SAXException中，并由SAX分析器来处理SAXException异常。</P></DIV>
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