java解析xml之sax解析xml示例分享

package com.test;

import java.io.file;
import java.io.fileinputstream;
import java.util.arraylist;
import java.util.list;

import javax.xml.parsers.saxparser;
import javax.xml.parsers.saxparserfactory;

import org.xml.sax.attributes;
import org.xml.sax.saxexception;
import org.xml.sax.helpers.defaulthandler;

public class saxxml {

    public static void main(string[] args) {
        file file = new file("e:/people.xml");
        try {
            saxparserfactory spf = saxparserfactory.newinstance();
            saxparser parser = spf.newsaxparser();
            saxhandler handler = new saxhandler("people");
            parser.parse(new fileinputstream(file), handler);

            list<people> peoplelist = handler.getpeoples();
            for(people people : peoplelist){
                system.out.println(people.getid()+"\t"+people.getname()+"\t"+people.getenglishname()+"\t"+people.getage());
            }
        } catch (exception e) {
            // todo auto-generated catch block
            e.printstacktrace();
        }
    }

}

class saxhandler extends defaulthandler {
    private list<people> peoples = null;
    private people people;
    private string currenttag = null;
    private string currentvalue = null;
    private string nodename = null;

    public list<people> getpeoples() {
        return peoples;
    }

    public saxhandler(string nodename) {
        this.nodename = nodename;
    }

    @override
    public void startdocument() throws saxexception {
        // todo 当读到一个开始标签的时候，会触发这个方法
        super.startdocument();

        peoples = new arraylist<people>();
    }

    @override
    public void enddocument() throws saxexception {
        // todo 自动生成的方法存根
        super.enddocument();
    }

    @override
    public void startelement(string uri, string localname, string name,
            attributes attributes) throws saxexception {
        // todo 当遇到文档的开头的时候，调用这个方法
        super.startelement(uri, localname, name, attributes);

        if (name.equals(nodename)) {
            people = new people();
        }
        if (attributes != null && people != null) {
            for (int i = 0; i < attributes.getlength(); i++) {
                if(attributes.getqname(i).equals("id")){
                    people.setid(attributes.getvalue(i));
                }
                else if(attributes.getqname(i).equals("en")){
                    people.setenglishname(attributes.getvalue(i));
                }
            }
        }
        currenttag = name;
    }

    @override
    public void characters(char[] ch, int start, int length)
            throws saxexception {
        // todo 这个方法用来处理在xml文件中读到的内容
        super.characters(ch, start, length);

        if (currenttag != null && people != null) {
            currentvalue = new string(ch, start, length);
            if (currentvalue != null && !currentvalue.trim().equals("") && !currentvalue.trim().equals("\n")) {
                if(currenttag.equals("name")){
                    people.setname(currentvalue);
                }
                else if(currenttag.equals("age")){
                    people.setage(currentvalue);
                }
            }
        }
        currenttag = null;
        currentvalue = null;
    }

    @override
    public void endelement(string uri, string localname, string name)
            throws saxexception {
        // todo 在遇到结束标签的时候，调用这个方法
        super.endelement(uri, localname, name);

        if (name.equals(nodename)) {
            peoples.add(people);
        }
    }

}