【Java】Properties文件的解析

 public abstract class ReadProperties {

     public ReadProperties() {}

     /**
      * 回调函数，由调用者处理
      * @param key
      * @param value
      */
     public abstract void dealKeyAndValue(String key, String value);

     /**
      * 根据包路径解析
      * @param packagePath
      * @throws IOException
      */
     public void read(String packagePath) throws IOException {
         InputStream is = this.getClass().getResourceAsStream(packagePath);
         read(is);
     }

     /**
      * 根据文件的绝对路径解析
      * @param absolutePath
      * @throws IOException
      */
     public void readFile(String absolutePath) throws IOException {
         read(new File(absolutePath));
     }

     /**
      * 根据{@link File}解析
      * @param file
      * @throws IOException
      */
     public void read(File file) throws IOException {
         read(new FileInputStream(file));
     }

     /**
      * 根据{@link InputStream}解析
      * @param is
      * @throws IOException
      */
     public void read(InputStream is) throws IOException {
         Properties properties = new Properties();
         try {
             // Properties文件会出现乱码问题，以UTF-8的方式打开
             properties.load(new InputStreamReader(is, "UTF-8"));
             Enumeration<Object> keys = properties.keys();

             while (keys.hasMoreElements()) {
                 String key = (String) keys.nextElement();
                 String value = properties.getProperty(key);
                 properties.get(key);

                 dealKeyAndValue(key, value);
             }
         } finally {
             is.close();
         }
     }

 }

使用：
在src下新建一个test.properties文件如下：

执行解析：

 public class Test {

     public static void main(String[] args) throws Exception {
         new ReadProperties() {
             @Override
             public void dealKeyAndValue(String key, String value) {
                 System.out.println(key + " = " + value);
             }
         }.read("/test.properties");;
     }

 }

结果如下：