java - 从 json 转换为带有 gson 的类似乎没有做任何事情

Question

我正在尝试使用 gson 反序列化一个 json 字符串.这是我的代码

static class ReturnPramaters {
    public ReturnPramaters()
    {
    }
    public Boolean LoginFailed = true;
    public String LoginFailedReason = "";
    public String AppPath  = "";
    public String WorkstiaonGuid = "";
    public String RDPUsername  = "";
    public String RDPPassword  = "";
    public int StartMode = -1;
    public String ServerAddress  = "";
}
public static void main(String[] args) {
    String json = sendGetRequest("http://example.com:80/Rdp/json/login","username=test&password=1234");
    Gson gson = new Gson();
    ReturnPramaters para = gson.fromJson(json, ReturnPramaters.class);
    if(para.LoginFailed)
        JOptionPane.showMessageDialog(null, para.LoginFailedReason, "Login Failed",JOptionPane.ERROR_MESSAGE);
    else {
        //...
    }
}

这是我从 get 请求中返回的 json 字符串。

"{"d":{"__type":"ReturnPramaters:#ServerApp","AppPath":"C:\\Remote Desktop Manager\\Launcher\\Launcher.exe","LoginFailed":false,"LoginFailedReason":null,"RDPPassword":"XjE2QAL","RDPUsername":"test09","ServerAddress":"example.com","StartMode":1,"WorkstiaonGuid":"96175701-f72a-44e9-8ee1-6eb756293654"}}"

但是在 ReturnPramaters para = gson.fromJson(json, ReturnPramaters.class); 之后，para 仍然具有所有未初始化的值。导致失败的原因是什么？

Answer 1

您要映射到的 JSON 似乎包装在另一个具有 d 和 _type 字段的对象中。

因此创建一个简单的包装器类:

class JsonWrapper{
    public ReturnPramaters d;
}