我一直试图从xml文件中提取数据,但我不断收到此错误,我不知道我做错了什么.
10-23 14:20:29.250: WARN/System.err(3541): --------------- linked to ------------------ 10-23 14:20:29.250: WARN/System.err(3541): javax.xml.xpath.XPathExpressionException: javax.xml.transform.TransformerException: A location step was expected following the '/' or '//' token.
这是我的代码：
String pill;
URL url = new URL("file:///mnt/sdcard/cpdata/cpxml.xml");
InputSource xml = new InputSource(url.openStream());
XPath xpath = XPathFactory.newInstance().newXPath();
pill = xpath.evaluate("//data/monday/p1/",xml);
pills.add(pill);
Log.d("PILLLLLLSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS",pill);
tv.setText(pill + "hi");
这是我的xml文档：
-<data>
-<monday>
<p1>test1</p1>
<p2>test1</p2>
</monday>
-<tuesday>
<p1>test1</p1>
<p2>test1</p2>
</tuesday>
-<wednesday>
<p1>1.0</p1>
<p2>test1</p2>
</wednesday>
-<thursday>
<p1>test1</p1>
<p2>test1</p2>
</thursday>
-<friday>
<p1>test1</p1>
<p2>test1</p2>
</friday>
-<saturday>
<p1>test1</p1>
<p2>test1</p2>
</saturday>
-<sunday>
<p1>test1</p1>
<p2>test1</p2>
</sunday>
解决方法
问题很明显：
pill = xpath.evaluate(“//data/monday/p1/”,xml);
使用的XPath表达式：
data/monday/p1/
以“/”结尾,因此在语法上是非法的.
使用：
pill = xpath.evaluate("//data/monday/p1",xml);