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);

}

}

}