c# - 使用 JSON 响应从 Java 调用 C# Web 服务

Question

在我们的工作编程环境中，我们有 Java 和 C# 开发人员。我有一个用 C# 创建的 Web 服务，Java 开发人员正在尝试使用它。我一直在编写 Java 来使用此 Web 服务，虽然我得到了 json 结果，但它的格式错误。

这是我在 C# 方面的内容:

[WebMethod]
public static LinkedList<string> GetInfo(string InfoID, string Username, string Password)
{
    LinkedList<string> Result = new LinkedList<string>();
    try
    {
        // Do some stuff I can't show you to get the information...
        foreach (Result from data operations)
        {
            Result.AddLast(sample1);
            Result.AddLast(sample2);
            Result.AddLast(sample3);
            Result.AddLast(BD));
            Result.AddLast(CN);
            Result.AddLast(Name);
            Result.AddLast("###");
        }
    }catch(Exception exc)
    {
        Result.AddLast(exc.ToString());
        return Result;
    }            
    return Result;
}

那么这是 Java 端:

try {
    String uri = "http://example.com/service.asmx/GetInfo";

    URL url = new URL(uri);
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();

    // Setup Connection Properties
    connection.setRequestMethod("POST");
    connection.setDoInput(true);
    connection.setDoOutput(true);
    connection.setRequestProperty("Content-Type", "application/json");
    connection.setRequestProperty("charset", "utf-8");
    connection.setRequestProperty("Accept", "application/json");            
    connection.setChunkedStreamingMode(0);
    connection.connect();

    // Create the JSON Going out
    byte[] parameters = "{'InfoID':'123456789','Username':'usernametoken','Password':'passwordtoken'}".getBytes("UTF-8");


    // Start doing stuff                
    DataOutputStream os = new DataOutputStream(connection.getOutputStream());
    os.write(parameters);
    os.close();         
    InputStream response;                   

    // Check for error , if none store response
    if(connection.getResponseCode() == 200){response = connection.getInputStream();}
    else{response = connection.getErrorStream();}

    InputStreamReader isr = new InputStreamReader(response);
    StringBuilder sb = new StringBuilder();
    BufferedReader br = new BufferedReader(isr);
    String read = br.readLine();

    while(read != null){
        sb.append(read);
        read = br.readLine();
    }   
    // Print the String     
    System.out.println(sb.toString());

    // Creat JSON off of String
    JSONObject token = new JSONObject(sb.toString());

    // print JSON
    System.out.println("Tokener: " + token.toString());
    response.close();

} catch(IOException exc) {
    System.out.println("There was an error creating the HTTP Call: " + exc.toString());
}

我得到的回复是这种形式......

{"d":["Sample1","Sample2","Sample3","BD","CN","Name","###","Sample1","Sample2","Sample3","BD","CN","Name","###","Sample1","Sample2","Sample3","BD","CN","Name","###"]}

我想知道是否有更好的方法来发送响应，使得 JSON 看起来像这样:

{"1":["Sample1","Sample2","Sample3","BD","CN","Name","###"],"2":["Sample1","Sample2","Sample3","BD","CN","Name","###"],"3":["Sample1","Sample2","Sample3","BD","CN","Name","###"],"4":["Sample1","Sample2","Sample3","BD","CN","Name","###"]}

Answer 1

好的，我想我在这里看到了你的问题。您希望将数据序列化为

{"1":["Sample1","Sample2","Sample3","BD","CN","Name","###"],"2":["Sample1","Sample2","Sample3","BD","CN","Name","###"],"3":["Sample1","Sample2","Sample3","BD","CN","Name","###"] ... etc

然而，您正在序列化的数据结构是单个链表，这就是它被序列化为单个长列表的原因。您需要做的是更改数据结构。 Dictionary 是完美的，因为它很容易序列化为 JSON。

[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
[WebMethod]
public static Dictionary<int,LinkedList<string>> GetInfo(string InfoID, string Username, string Password)
{
    var Result = new Dictionary<int,LinkedList<string>>();
    try
    {
        // Do some stuff I can't show you to get the information...

        foreach (Result from data operations)
        {
            var newList = new LinkedList<string>();     
            newList.AddLast(sample1);
            newList.AddLast(sample2);
            newList.AddLast(sample3);
            newList.AddLast(BD));
            newList.AddLast(CN);
            newList.AddLast(Name);
            newList.AddLast("###");
            int number = something //the number before the list
            Result.add( number, newList);
        }
    }catch(Exception exc)
    {
        .
        .
        .
    }            
    return Result;
}