Java parsing XML with sax

MyHandler

package com.heli.xml.sax;/** *  parsing xml with sax Handler */import java.util.arraylist;import  java.util.HashMap;import java.util.List;import java.util.Map;import  org.xml.sax.attributes;import org.xml.sax.saxexception;import org.xml.sax.helpers.defaulthandler; public class myhandler extends defaulthandler {//  stores data for the element being parsed Private map <String, String> map = null;//  stores data private list<map<string for all parsed elements,  String>> list = null;//  the name of the element being parsed string currenttag = null;//   The element value of the element being parsed string currentvalue = null;//  begins parsing the element string nodename =  Null;public myhandler (String nodename)  {// TODO Auto-generated constructor  Stubthis.nodename = nodename;} Public list<map<string, string>> getlist ()  {return list;}   begins parsing the document, which begins the solutionWhen you analyze an XML root element, call the method @overridepublic void startdocument ()  throws saxexception {// todo  auto-generated method stub//system.out.println ("--startdocument ()--");//  initialization maplist  = new arraylist<map<string, string>> ();}   calls this method when it starts parsing each element @overridepublic void startelement (string uri, string  Localname, string qname, attributes attributes)  throws saxexception {//  TODO Auto-generated method stub//  determines that the element being parsed is not the element that begins parsing//system.out.println ("-- Startelement ()--" + qname";if  (Qname.equals (nodeName))  {map = new hashmap <String, String> ();}   Determines whether the element being parsed has a property value, and if so, takes it all out and saves it to the map object, such as: <person id= "00001" ></person>if  ( Attributes != null && map != null)  {for  (int i =  0; i < attributes.getlength ();  i++)  {map.put (Attributes.getqname (i),  attributes.getvalue (i));}} This method is called when the element currenttag = qname; //  is parsing}//  resolves to the content of each element @overridepublic void  Characters (Char[] ch, int start, int length)  throws saxexception {//  todo auto-generated method stub//system.out.println ("--characters ()--");if  ( Currenttag != null && map != null)  {currentvalue = new  string (ch, start, length);//  If the content is not empty and spaces, and is not a newline character, the element name and value are stored in the map if  (currentvalue ! = null && !currentvalue.trim (). Equals ("")  && !currentvalue.trim (). Equals ("\ n"))  {map.put (Currenttag, currentvalue);//system.out.println ("-----"  + currenttag  +  " "  + currentvalue);}   The current element has been parsed, empty it for parsing currenttag = null;currentvalue = null of the next element;}}   This method is called at the end of each element @overridEpublic void endelement (string uri, string localname, string qname)   Throws saxexception {// todo auto-generated method stub//system.out.println ("-- EndElement ()---" + qname";//  determines whether the element tag is the end of a node if  (qname.equals (nodeName))  {list.add (map ); map = null;}}   Ends parsing the document, which is called when parsing the root element end tag @overridepublic void enddocument ()  throws saxexception  {// todo auto-generated method stub//system.out.println ("--endDocument ()--"); Super.enddocument ();}}

Saxservice

Package com.heli.xml.sax;/** * Packaging parsing business class */import Java.util.list;import Java.util.map;import Javax.xml.parsers.saxparser;import Javax.xml.parsers.saxparserfactory;public class SaxService {public static List <map<string, string>> ReadXML (string uri, string NodeName) {try {//Create a factory object that parses XML saxparserfactory Parserfactory = Saxparserfactory.newinstance ();//Create an object that parses XML saxparser parser = Parserfactory.newsaxparser ();// Create a parsing helper class MyHandler MyHandler = new MyHandler ("Uncall");p Arser.parse (URI, MyHandler); return myhandler.getlist ();} catch (Exception e) {e.printstacktrace ();} finally {}return null;}}

Xmlsaxtest

package com.heli.xml.sax;/** *  Program Entry  */import java.util.ArrayList;import  Java.util.hashmap;import java.util.iterator;import java.util.map;public class xmlsaxtest  {/** *  @param  args */public static void main (String[] args)  {ArrayList<Map<String, String>> list =  (Arraylist<map<string,  String>>)  saxservice.readxml ("E:\\test.xml",  "class");for  (int i = 0 ;  i < list.size ();  i++)  {HashMap<String, String> temp =  (hashmap<string, string>)  list.get (i);iterator<string> iterator =  Temp.keyset (). Iterator ();while  (Iterator.hasnext ())  {string key = iterator.next (). ToString (); String value = temp.get (key); System.out.println ("Key:" +key +  "--value:"  + value );}} System.out.prinTLN ("--------------------------------------"); System.out.println (List.tostring ());}}

Test.xml

<?xml version= "1.0" encoding= "Utf-8"?><uncall> <result>1</result> <OnClickCall> < Response>success</response> <ActionID>123456</ActionID> <message>originate Successfully queued</message> </OnClickCall></uncall>

Java parsing XML with sax