xml解析Jsoup根据选择器查询以及根据Xpath查询

xml解析Jsoup根据选择器查询

selector：选择器

　　使用的方法：Elements select(String cssQuery);

　　　　语法：参考Selector类中定义的语法

public class JsoupDemo04 {
    public static void main(String[] args) throws IOException {
        //获取studen.xml的path
        String path = JsoupDemo04.class.getClassLoader().getResource("student1.xml").getPath();
        //获取Document对象
        Document document = Jsoup.parse(new File(path), "UTF-8");
        //Elements select(String cssQuery);
        //查询name标签
        Elements name = document.select("name");
        System.out.println(name);
        System.out.println("------------------");
        //查询id值为1的元素
        Elements select = document.select("#1");
        System.out.println(select);
        System.out.println("------------------");
        //获取student标签并且number属性值为aaa_0001的age子标签
        //获取student标签并且number属性值为aaa_0001
        Elements select1 = document.select("student[number='aaa_0001']");
        System.out.println(select1);
        System.out.println("------------------");
        //获取student标签并且number属性值为aaa_0001的age子标签
        Elements age = select1.select("student[number='aaa_0001']>age");
        System.out.println(age);
    }
}

 

 

 

 

 

 

xml解析根据Xpath查询

XPath：XPath即为XML路径语言（XML Path Language），它是一种用来确定XML文档中某部分位置的语言。

　　使用Jsoup的Xpath需要额外导入jar包：JsoupXpath-0.3.2.jar　　

　　查询w3cschool参考手册，使用xpath的语法完成查询

public class JsoupDemo04 {
    public static void main(String[] args) throws IOException, XpathSyntaxErrorException {
        //获取studen.xml的path
        String path = JsoupDemo04.class.getClassLoader().getResource("student1.xml").getPath();
        //获取Document对象
        Document document = Jsoup.parse(new File(path), "UTF-8");
        /**
         * 根据Xpath查询
         */
        //根据Document对象创建JXDocument对象
        JXDocument jxDocument = new JXDocument(document);
        //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("--------------------");
        //查询所有的student标签下的name标签
        List<JXNode> jxNodes1 = jxDocument.selN("//student/name");
        for (JXNode jxNode : jxNodes1) {
            System.out.println(jxNode);
        }
        System.out.println("--------------------");
        //查询所有的student标签下带有id属性的name标签
        List<JXNode> jxNodes2 = jxDocument.selN("//student/name[@id]");
        for (JXNode jxNode : jxNodes2) {
            System.out.println(jxNode);
        }
        System.out.println("--------------------");
        //查询所有的student标签下带有id属性的name标签标签id属性值为1
        List<JXNode> jxNodes3 = jxDocument.selN("//student/name[@id='1']");
        for (JXNode jxNode : jxNodes3) {
            System.out.println(jxNode);
        }
        System.out.println("--------------------");
    }
}