您当前的位置: - XML code
<?xml version="1.0" encoding="utf-8" ?> - <info> <status>ok</status> <error /> - <item> <uid>819789</uid> <show>好的</show> <email /> </item> </info> - <item> <uid>819780</uid> <show>好的2</show> <email>eee@222.com<email> </item> - <item> <uid>819720</uid> <show>好的3</show> </item> </info>
如果status为ok的情况下,就读取item的属性
采用org.w3c.dom解析.
刚学JAVA.在XML上就有问题了.上网找了些.呵呵.主要是对于例如<email /> 的值为空或者没有<email>这个节点要如何判断.
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用android自带的解析器 SAX 解析起来速度非常快 而且挺简单的
如果解析status为ok 就设置一个boolean 因为SAX是逐行解析的 如果为TRUE的话 就解析下一个 如果是FALSE 就return 这样就可以了 看下sdk的文档
------解决方案--------------------
用SAX工厂类生成它 然后定义DefaultHandler 定义解析XML的规则
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser parser = factory.newSAXParser();
然后parser.pareser(xml的输入流，定义的解析规则handler);
------解决方案--------------------
直接上代码，用sax解析。
主要在startElement
characters
这两个函数里面做数据的操作。
- Java code
mButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
DefaultHttpClient client = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
HttpResponse response = null;
try {
response = client.execute(httpPost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String str = null;
try {
str = EntityUtils.toString(response.getEntity());
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
StringReader reader = new StringReader(str);
InputSource source = new InputSource(reader);
try {
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser paser = factory.newSAXParser();
XMLReader xmlReader = paser.getXMLReader();
DecodeHandler handler = new DecodeHandler();
xmlReader.setContentHandler(handler);
xmlReader.parse(source);
} catch (Exception e) {
// TODO: handle exception
}
}
});
}
public class DecodeHandler extends DefaultHandler{
@Override
public void ignorableWhitespace(char[] ch, int start, int length) throws SAXException {
// TODO Auto-generated method stub
super.ignorableWhitespace(ch, start, length);
}
@Override
public void notationDecl(String name, String publicId, String systemId) throws SAXException {
// TODO Auto-generated method stub
super.notationDecl(name, publicId, systemId);
}
@Override
public void processingInstruction(String target, String data) throws SAXException {
// TODO Auto-generated method stub
super.processingInstruction(target, data);
}
@Override
public InputSource resolveEntity(String publicId, String systemId) throws IOException,
SAXException {
// TODO Auto-generated method stub
return super.resolveEntity(publicId, systemId);
}
@Override
public void startPrefixMapping(String prefix, String uri) throws SAXException {
// TODO Auto-generated method stub
super.startPrefixMapping(prefix, uri);
}
@Override
public void unparsedEntityDecl(String name, String publicId, String systemId,
String notationName) throws SAXException {
// TODO Auto-generated method stub
super.unparsedEntityDecl(name, publicId, systemId, notationName);
}
@Override
public void warning(SAXParseException e) throws SAXException {
// TODO Auto-generated method stub
super.warning(e);
}
@Override
public void characters(char[] ch, int start, int length) throws SAXException {
// TODO Auto-generated method stub
super.characters(ch, start, length);
}
@Override
public void endDocument() throws SAXException {
// TODO Auto-generated method stub
super.endDocument();
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
// TODO Auto-generated method stub
super.endElement(uri, localName, qName);
}
@Override
public void endPrefixMapping(String prefix) throws SAXException {
// TODO Auto-generated method stub
super.endPrefixMapping(prefix);
}
@Override
public void setDocumentLocator(Locator locator) {
// TODO Auto-generated method stub
super.setDocumentLocator(locator);
}
@Override
public void skippedEntity(String name) throws SAXException {
// TODO Auto-generated method stub
super.skippedEntity(name);
}
@Override
public void startDocument() throws SAXException {
// TODO Auto-generated method stub
super.startDocument();
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws SAXException {
// TODO Auto-generated method stub
super.startElement(uri, localName, qName, attributes);
}
}