如何使用GSon公开一个方法？ [英] How to expose a method using GSon?

问题描述

使用Play Framework，我通过GSON序列化我的模型。我指定哪些字段是暴露的，哪些不是。

这很好用，但我也想用@expose方法。当然，这太简单了。

我该怎么做？

感谢您的帮助！ / p>

  public class Account extends Model {
 @Expose 
 public String username; 
 
 @Expose 
 public String email; 
 
公共字符串密码; 
 
 @Expose //当然，这不起作用
 public String getEncodedPassword（）{
 // ... 
} 
} 
  

解决方案

我遇到这个问题的最佳解决方案是制作一个专用序列化程序：

  public class AccountSerializer实现JsonSerializer< Account> {
 
 @Override 
 public JsonElement serialize（Account account，Type type，JsonSerializationContext context）{
 JsonObject root = new JsonObject（）; 
 root.addProperty（id，account.id）; 
 root.addProperty（email，account.email）; 
 root.addProperty（encodedPassword，account.getEncodedPassword（））; 
 
返回root; 
} 
 
} 
  

并且像这样使用它我的看法：

pre $ g $ c $ gsonBuilder gson = new GsonBuilder（）;
gson.registerTypeAdapter（Account.class，new AccountSerializer（））;
Gson parser = gson.create（）;
renderJSON（parser.toJson（json））;

但是，有一个方法可以使用 @Expose 会很好：它会避免仅仅为了显示方法而使用序列化程序！

Using Play Framework, I serialize my models via GSON. I specify which fields are exposed and which aren't.

This works great but I'd also like to @expose method too. Of course, this is too simple.

How can I do it ?

Thanks for your help !

public class Account extends Model {
    @Expose
    public String username;

    @Expose
    public String email;

    public String password;

    @Expose // Of course, this don't work
    public String getEncodedPassword() {
        // ...
    }
}

解决方案

The best solution I came with this problem was to make a dedicated serializer :

public class AccountSerializer implements JsonSerializer<Account> {

    @Override
    public JsonElement serialize(Account account, Type type, JsonSerializationContext context) {
        JsonObject root = new JsonObject();
        root.addProperty("id", account.id);
        root.addProperty("email", account.email);
        root.addProperty("encodedPassword", account.getEncodedPassword());

        return root;
    }

}

And to use it like this in my view:

GsonBuilder gson = new GsonBuilder();
gson.registerTypeAdapter(Account.class, new AccountSerializer());
Gson parser = gson.create();
renderJSON(parser.toJson(json));

But having @Expose working for a method would be great: it would avoid making a serializer just for showing methods!

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