android-file Analysis-< eight >

1.SAX

The full name simple API for XML, which is an interface, is also a package, as an interface,SAX is event-driven XML A standard interface for parsing.

It scans a line of XMLandparses it, then scans the next line and parses it.

The principle of 2.SAX

The 3.SAX implementation reads a string (the content is a character written after downloading from the network).

1. Get XmlReader:

        // Create a saxparserfactory       SAXParserFactory factory = saxparserfactory.newinstance ();        = Factory.newsaxparser (). Getxmlreader ();

2. Set the content processor for XmlReader. (The content handler class needs to inherit the method in the override with another class)

// Set the content processor Reader.setcontenthandler (new  Mycontenthandler ()) for XmlReader             ;

3. Start parsing files (using XmlReader's Parse method)

// start parsing the file, ResultStr is the string we want to parse reader.parse (new InputSource (new StringReader (RESULTSTR))) ;

4.ContentHandler Class (Content processor)

1 //here inherit DefaultHandler, not contenthandler reason is2 //using the adapter mode, we need to use some of the ContentHandler methods3 //No extra methods are needed, and DefaultHandler just gives us the methods we need, no extra methods .4  Public classMycontenthandlerextendsDefaultHandler {5 String Hisname, address, money, sex, status;6 String TagName;7 8      Public voidStartdocument ()throwssaxexception {9System.out.println ("" "" "" "" "" "" ".);Ten     } One  A      Public voidEnddocument ()throwssaxexception { -System.out.println ("" "" "" "" ""); -     } the  -      Public voidstartelement (String NamespaceURI, String localname, -String QName, Attributes attr)throwssaxexception { -TagName =LocalName; +         if(Localname.equals ("Worker")) { -             //get all the properties of a label +              for(inti = 0; I < attr.getlength (); i++) { ASystem.out.println (Attr.getlocalname (i) + "=" +Attr.getvalue (i)); at             } -         } -     } -  -      Public voidendElement (String NamespaceURI, String localname, string qName) -             throwssaxexception { in         //after the Workr label is parsed, all the resulting data is printed -TagName = ""; to         if(Localname.equals ("Worker")) { +              This. PrintOut (); -         } the     } *      Public voidCharacters (Char[] ch,intStartintlength) $             throwssaxexception {Panax Notoginseng         if(Tagname.equals ("name")) -Hisname =NewString (CH, start, length); the         Else if(Tagname.equals ("Sex")) +Sex =NewString (CH, start, length); A         Else if(Tagname.equals ("status")) theStatus =NewString (CH, start, length); +         Else if(Tagname.equals ("Address")) -Address =NewString (CH, start, length); $         Else if(Tagname.equals ("Money")) $Money =NewString (CH, start, length); -     } -  the     Private voidprintout () { -System.out.print ("Name:");Wuyi System.out.println (hisname); theSystem.out.print ("Sex:"); - System.out.println (sex); WuSystem.out.print ("Status:"); - System.out.println (status); AboutSystem.out.print ("Address:"); $ System.out.println (address); -System.out.print ("Money:"); - System.out.println (money); - System.out.println (); A     } +  the}

android-file Analysis-< eight >