java - 对象序列化不起作用

Question

它会执行除了保存和/或加载数据之外所需执行的所有操作。我假设问题在于加载，即使 try/catch 没有异常。这些文件是由插件创建的，但它不会加载关闭时应该保存的数据...

完整的类可以在这里找到:http://pastebin.com/pK3NCPfM

加载方法:

    public void getClans(){
        try { 
            // Load the Clans
            FileInputStream f_in = new FileInputStream("Clans.data");
            ObjectInputStream obj_in = new ObjectInputStream (f_in);
            @SuppressWarnings("unchecked")
            HashMap<String, Clan> Clans = (HashMap<String, Clan>) obj_in.readObject();
            obj_in.close();
            getLogger().info("Clans successfully loaded");
            } catch (Exception e) {
            getLogger().info("Error loading clan files...");
            getLogger().info(e.getMessage());
            } 
    }

    public void getPlayers(){
        try { 
            // Load the players that are in a clan
            FileInputStream f_in = new FileInputStream("clanPlayers.data");
            ObjectInputStream obj_in = new ObjectInputStream (f_in);
            @SuppressWarnings("unchecked")
            HashMap<String, String> clanPlayers = (HashMap<String, String>) obj_in.readObject();
            obj_in.close();
            getLogger().info("clanPlayers successfully loaded");
            } catch (Exception e) {
            getLogger().info("Error loading clanPlayer files...");
            getLogger().info(e.getMessage());
            } 
    }

更新: 我不知道为什么这行不通。如果有人能帮我修复有问题的线路，我就可以走了!

    public void getPlayers(){
        try { 
            // Load the players that are in a clan
            FileInputStream f_in = new FileInputStream("clanPlayers.data");
            ObjectInputStream obj_in = new ObjectInputStream (f_in);
            @SuppressWarnings("unchecked")
            clanPlayers = (HashMap<String, String>) obj_in.readObject(); // Error on this line. 
            //I want the HashTable ClanPlayers to be a copy of the object that was saved
            obj_in.close();
            getLogger().info("clanPlayers successfully loaded");
            } catch (Exception e) {
            getLogger().info("Error loading clanPlayer files...");
            getLogger().info(e.getMessage());
            } 
    }

Answer 1

这些方法不返回任何内容，也不初始化任何字段:仅初始化局部变量。所以它们基本上都是复杂的 noop。

此外，您不应该引发异常。捕获IOException，只有当你确实能够处理这个地方的异常时。否则，让异常传播，或者将其转换为 runeim 异常并抛出运行时异常。