Xpath案例

package cn.itcast.xml.jsoup;

import cn.wanghaomiao.xpath.exception.XpathSyntaxErrorException;
import cn.wanghaomiao.xpath.model.JXDocument;
import cn.wanghaomiao.xpath.model.JXNode;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

import java.io.File;
import java.io.IOException;
import java.util.List;

/**
 * @author 旗木五五开
 * @create 2020-02-13 23:35
 */
public class JsoupDemo6 {
    public static void main(String[] args) throws IOException, XpathSyntaxErrorException {
//        1.获取路径
        String path = cn.itcast.xml.jsoup.JsoupDemo1.class.getClassLoader().getResource("student.xml").getPath();
//        2.获取Document对象
        Document document = Jsoup.parse(new File(path), "utf-8");

//        3.使用支持 Xpath 语法的对象：JXDocument
//        根据document对象，创建
        JXDocument jxDocument = new JXDocument(document);

//        4.结合 Xpath 语法查询
//        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 jxNode2 : jxNodes2) {
            System.out.println(jxNode2);
        }
        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 jxNode3 : jxNodes3) {
            System.out.println(jxNode3);
        }
        System.out.println("--------------");

//        4.4查询student标签下带有id属性的name标签,并且id属性值为1
        List<JXNode> jxNodes4 = jxDocument.selN("//student/name[@id='1']");
        for (JXNode jxNode4 : jxNodes4) {
            System.out.println(jxNode4);
        }
        System.out.println("--------------");
    }

}