java - 读取配置文件

1. properties

	// 创建properties对象用于读取properties文件Properties properties = new Properties();properties.load(new FileReader("src/main/resources/test.properties"));String name = properties.getProperty("name");String age = properties.getProperty("age");System.out.println(name);System.out.println(age);

2. XML

(1) dom4j

maven坐标

    <dependency><groupId>dom4j</groupId><artifactId>dom4j</artifactId><version>1.1</version></dependency>

		// 获取解析器对象SAXReader xmlReader = new SAXReader();// 获取xml文件Document student = xmlReader.read(new File("student.xml"));Element root = student.getRootElement();// 获取根标签List<Element> elements = root.elements();// 获取根标签中的所有标签// 获取第一个元素的name标签的值String name = elements.get(0).element("name").getText();// 获取第一个元素的age标签的值String age = elements.get(0).element("age").getText();System.out.println(name);System.out.println(age);

(2) XPath

使用路径表达式进行解析

// 获取解析器对象SAXReader xmlReader = new SAXReader();Document student = xmlReader.read(new File("src\\main\\resources\\student.xml"));// 获取一个Node node = student.selectSingleNode("/students/student/name");System.out.println(node.getText());//获取多个List<Element> list = student.selectNodes("/students/student/*");for (Element element : list) {System.out.println(element.getText());}