xml文件
<?xml version="1.0" encoding="utf-8"?>
<bookstore>
<book id="1">
<name>冰与火之歌</name>
<author>乔治马丁</author>
<year>2014</year>
<price>89</price>
</book>
<book id="2">
<name>安徒生童话</name>
<year>2004</year>
<price>77</price>
<language>english</language>
</book>
</bookstore>
handler.java类
package xmltes;
import javax.xml.stream.events.characters;
import javax.xml.stream.events.startelement;
import org.xml.sax.attributes;
import org.xml.sax.saxexception;
import org.xml.sax.helpers.defaulthandler;
public class handler extends defaulthandler{
private static int booknum = 0;
//遍历xml文件的开始标签
@override
public void startelement(string uri, string localname, string qname, attributes attributes) throws saxexception {
// 调用defaulthandler父类的startelement方法
super.startelement(uri, localname, qname, attributes);
//判断是不是有属性的标签/如book
if(qname.equals("book")){
booknum++;
system.out.println("====================开始遍历第"+booknum+"书的内容================");
//开始解析book元素
//已知book元素下属性的名称，可以根据名称判断
/* string value = attributes.getvalue("id");
system.out.println("book的属性值是" + value);*/
//如果不知道数的属性名称
int num = attributes.getlength();
for(int i=0;i<num;i++){
system.out.println("书的第" + (i+1) + "个属性名是："+attributes.getqname(i)+"===属性值是：" + attributes.getvalue(i));
}
}else if(!qname.equals("book") && !qname.equals("bookstore") ){
system.out.println("节点名是：" + qname);
}
}
//遍历xml文件的结束标签
@override
public void endelement(string uri, string localname, string qname) throws saxexception {
// todo auto-generated method stub
super.endelement(uri, localname, qname);
//判断这本书是否遍历结束
if(qname.equals("book")){
system.out.println("====================结束遍历第"+booknum+"书的内容================");
}
}
@override
public void characters(char[] ch, int start, int length) throws saxexception {
// todo auto-generated method stub
super.characters(ch, start, length);
string value = new string(ch, start, length);
if(!value.trim().equals("")){
system.out.println(value);
}
}
//用来标识解析开始
@override
public void startdocument() throws saxexception {
// todo auto-generated method stub
super.startdocument();
// system.out.println("进入标识解析开始方法");
}
//用来标识解析结束
@override
public void enddocument() throws saxexception {
// todo auto-generated method stub
super.enddocument();
// system.out.println("进入标识解析结束方法");
}
}
test类
package xmltes;
import java.io.ioexception;
import javax.xml.parsers.parserconfigurationexception;
import javax.xml.parsers.saxparser;
import javax.xml.parsers.saxparserfactory;
import org.xml.sax.saxexception;
public class saxtest {
public static void main(string[] args) {
try {
//获取一个saxparserfactory的实例
saxparserfactory factory = saxparserfactory.newinstance();
//通过factory获取saxparser实例
saxparser parser = factory.newsaxparser();
//创建一个saxparserhandler对象
handler handler = new handler();
parser.parse("001.xml", handler);
} catch (parserconfigurationexception e) {
// todo auto-generated catch block
e.printstacktrace();
} catch (saxexception e) {
// todo auto-generated catch block
e.printstacktrace();
} catch (ioexception e) {
// todo auto-generated catch block
e.printstacktrace();
}
}
}
以上就是xml文件使用sax方法读取的示例代码的详细内容。