java - 如何使用属性从 .txt 文件取回 map ？

Question

这是将哈希表写入.txt 文件的代码!

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;
}