java如何从中获取地图。txt文件使用属性？

Question

这是写哈希表的代码。txt文件

public static void save(String filename, Map<String, String> hashtable) throws IOException {
    Properties prop = new Properties();
    prop.putAll(hashtable);
    FileOutputStream fos = new FileOutputStream(filename);
    try {
       prop.store(fos, prop);
    } finally {
       fos.close();
    }
}

我们如何从该文件中取回哈希表？ 谢谢

Answer 1

以同样丑陋的方式：

@SuppressWarnings("unchecked")
public static Map<String, String> load(String filename) throws IOException {
    Properties prop = new Properties();
    FileInputStream fis = new FileInputStream(filename);
    try {
        prop.load(fis);
    } finally {
        fis.close();
    }
    return (Map) prop;
}