java如何解析xml？

技术点： getResourceAsStream方法，dom4j的SaxReader解析xml

1.加载磁盘xml文件到内存中(InputStream)

package com.example.utils;
 
import java.io.InputStream;
 
public class Resource {
    public static InputStream load(String path) {
        return Resource.class.getClassLoader().getResourceAsStream(path);
    }
}

2.引入dom4j的jar依赖包

    <dependencies>
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>
    </dependencies>

3.使用SaxReader类解析xml的内存输入流InputStream

    public Properties parse(InputStream in) throws DocumentException {
        Properties prop = new Properties();
        SAXReader saxReader = new SAXReader();
        Document document = saxReader.read(in);
        Element rootElement = document.getRootElement();
        List<Element> list = rootElement.selectNodes("//property");
        for (Element element : list) {
            String name = element.attributeValue("name");
            String value = element.attributeValue("value");
            prop.setProperty(name, value);
        }
        return prop;
    }