java jsoupxpath_Jsoup中Xpath的使用

?xml version= 1.0 encoding= UTF-8 ?

students

student number= heima_0001

name id= 1

xing wu /xing

ming di /ming

/name

age  name= xiaoer 19 /age

sex male /sex

/student

student number= heima_0002

name wudi /name

age 19 /age

sex male /sex

/student

/students

package cn.itcast.xml.jsoup;

import java.io.File;

import java.io.IOException;

import java.util.List;

import org.jsoup.Jsoup;

import org.jsoup.nodes.Document;

import org.jsoup.nodes.Element;

import org.jsoup.select.Elements;

import cn.wanghaomiao.xpath.exception.XpathSyntaxErrorException;

import cn.wanghaomiao.xpath.model.JXDocument;

import cn.wanghaomiao.xpath.model.JXNode;

/*

* Jsoup快速入门

*/

public class JsoupDemo6 {

public static void main(String[] args) throws IOException, XpathSyntaxErrorException {

//2.获取Document对象(是要基于xml文档才可以获取的)

//根据xml文档来获取

//2.1获取student.xml的path

String path=JsoupDemo6.class.getClassLoader().getResource( student.xml ).getPath();

//2.2解析xml文档，加载文档进内存，获取dom树(也就获取到了document对象)

Document document = Jsoup.parse(new File(path), utf-8 //字符集和文本的字符集一致

//3.根据document对象,创建JXDocument对象

JXDocument jxDocument=new JXDocument(document);

//4.结合Xpath语法来查询了

//4.1查询所有的student标签

List JXNode jxNodes = jxDocument.selN( //student

for (JXNode jxNode : jxNodes) {

System.out.println(jxNode);

}

System.out.println( ===============

//4.2查询所有student标签下的name标签

List JXNode jxNodes2 = jxDocument.selN( //student/name

for (JXNode jxNode : jxNodes2) {

System.out.println(jxNode);

}

System.out.println( ===============

//4.3查询student标签下带有id属性的name标签

List JXNode jxNodes3 = jxDocument.selN( //student/name[@id]

for (JXNode jxNode : jxNodes3) {

System.out.println(jxNode);

}

System.out.println( ===============

//4.4查询student标签下带有id属性的name标签并且id的属性值为1

List JXNode jxNodes4 = jxDocument.selN( //student/name[@id= 1 ]

for (JXNode jxNode : jxNodes4) {

System.out.println(jxNode);

}

}

}