Java读取.properties配置文件方法示例

public class Main {

  public static void main(String[] args) throws IOException {
    //创建Properties对象
    Properties prop = new Properties();
    //读取classPath中的properties文件
    prop.load(Main.class.getClassLoader().getResourceAsStream("bean.properties"));
    //根据键取出值
    String className = prop.getProperty("className");
    System.out.println(className);
    
  }
}

public class PropertyUtil {

  private static Properties prop = new Properties();

  static {
    try {
      prop.load(PropertyUtil.class.getClassLoader().getResourceAsStream("calculator.properties"));
    } catch (IOException e) {
      throw new RuntimeException(e.getMessage());
    }
  }

  /**
   * 根据Name获取Property
   * @param name
   * @return
   */
  public static String getProperty(String name) {
    return prop.getProperty(name);
  }

  /**
   * 获取所有的Property
   * @return
   */
  public static List<String> getBeanFactoryClass() {
    List<String> list = new ArrayList<>();
    Set<String> keys = prop.stringPropertyNames();
    for (String key : keys) {
      list.add(prop.getProperty(key));
    }
    return list;
  }
}