java - 强化 try-with-resource 的安全问题 "Unreleased resource stream"

Question

强化安全运行不合规代码

public static A read(String path) throws IOException, ClassNotFoundException {
    try (ObjectInputStream os = new ObjectInputStream(new GZIPInputStream(new FileInputStream(path)))) {
        return (A) os.readObject();
    }
}

它说的是“未释放的资源:Streams”，但它位于 try-with-resource 内，那么可能是什么问题？请帮助我。

Answer 1

您的工具可能担心的问题是，如果 GZIPInputStream 或 ObjectInputStream 在实例化期间抛出异常，则 FileInputStream 将不会关闭。您可以尝试以下方法:

public static A read(String path) throws IOException, ClassNotFoundException {
    try (FileInputStream fileInput = new FileInputStream(path);
         GZIPInputStream gzipInput = new GZIPInputStream(fileInput);
         ObjectInputStream objectInput = new ObjectInputStream(gzipInput)) {
        return (A) objectInput.readObject();
    }
}