Java短原语类型问题

我正在构建一个应用程序，它需要使用post方法连接服务器，并获得结果。我需要获取服务器响应的特定部分，并将其转换为不同类型的原语（从

String

到

short

，

int

，

byte

等）

因此，基本上我需要获取响应代码的一部分并将其转换为short，然后查看是否存在具有此值的

enum

元素。但问题是响应返回值

001

，在我将其转换为short并将其传递给

enum

中的

getByValue（int）

方法之后，它告诉我没有001的元素。如果我打印

short

值，我会得到

1

下面是我正在使用的代码示例：

                httppost.setEntity(new UrlEncodedFormEntity(postParameters));

            HttpResponse response = httpclient.execute(httppost);
            Log.v("Response ","Status line : "+ response.getStatusLine().toString());
            String responseBody = EntityUtils.toString(response.getEntity()); //response
            Log.v("Response ","Response : "+ responseBody);

            int objectIdentificator = Integer.parseInt(responseBody.substring(0,32));
            Log.v("Response ","Object Identificator (LONGINT) : "+ responseBody.substring(0,32));
            Log.v("Response ","Object Identificator (LONGINT) : "+ objectIdentificator);

            String type = responseBody.substring(32,35);
            Log.v("Response ","TYPE (UNSIGNED BYTE) : "+ type);
            short pType = Short.parseShort(type); // short 
            Log.v("Response ","TYPE (UNSIGNED BYTE) : "+ pType);

            String operation = responseBody.substring(35,38); //
            short operationType = Short.parseShort(operation);
            Log.v("Response ","OPERATION (UNSIGNED BYTE) : "+ operation);
            Log.v("Response ","OPERATION (UNSIGNED BYTE) : "+ operationType);

            String objectId = responseBody.substring(38, 70);
            Log.v("Response ","UID (CHAR, length 32) : "+ objectId);

            int id = Integer.parseInt(responseBody.substring(70, 102));
            Log.v("Response ","ID (LONGINT) : "+ responseBody.substring(70, 102));
            Log.v("Response ","ID (LONGINT) : "+ id);

            String size = responseBody.substring(102,134);          
            Log.v("Response ","Data Size (LONGINT) : "+ size);

            String hash = responseBody.substring(134,166);
            Log.v("Response ","Data Hash (CHAR, length 32 : "+ hash);

            String  dType = responseBody.substring(166,169);
            Log.v("Response ","Data Type (UNSIGNED BYTE) : "+ dType);
            short dataType = Short.parseShort(dType);
            Log.v("Response ","Data Type (UNSIGNED BYTE) : "+ dataType);

            String data = responseBody.substring(169, responseBody.length());
            Log.v("Response ","Data (CHAR, any length, in BASE64) : "+ data);

            byte[] first = Base64.decode(data);
            String string = new String(first, "UTF-8");

            Log.v("Response ","BASE 64 : "+ string);


            RPCPacket packet = new RPCPacket(   objectIdentificator,
                                                RPCPacketType.getPacketTypeByValue(pType),
                                                RPCOperationType.getByValue(Integer.parseInt(operation)),
                                                objectId,
                                                id,
                                                Integer.parseInt(size),
                                                hash,
                                                RPCPacketDataType.getByValue(dataType),
                                                first
                                                );


            Log.v("PacketType", "RPCPacketType : "+packet.packetTypeToStr(RPCPacketType.getPacketTypeByValue(pType)));

和packetTypeToStr代码：

public String packetTypeToStr(RPCPacketType type){

        String str=null;
        switch(type){
        case ST_OBJECT_TYPE_INFO_START: 
                str = "ST_OBJECT_TYPE_INFO_START"; 
            break;
        case ST_OBJECT_TYPE_INFO_ERROR: 
                str = "ST_OBJECT_TYPE_INFO_ERROR"; 
            break;
        case ST_OBJECT_TYPE_COLLECTION: 
                str = "ST_OBJECT_TYPE_COLLECTION"; 
            break;
        case ST_OBJECT_TYPE_CATEGORY: 
                str = "ST_OBJECT_TYPE_CATEGORY";
            break;
        case ST_OBJECT_TYPE_CARD: 
                str = "ST_OBJECT_TYPE_CARD"; 
            break;
        case ST_OBJECT_TYPE_MESSAGE: 
                str = "ST_OBJECT_TYPE_MESSAGE"; 
            break;
        case ST_OBJECT_TYPE_GENRE: 
                str = "ST_OBJECT_TYPE_GENRE"; 
            break;
        case ST_OBJECT_TYPE_TAG: 
                str = "ST_OBJECT_TYPE_TAG"; 
            break;
        case ST_OBJECT_TYPE_USER: 
                str = "ST_OBJECT_TYPE_USER"; 
            break;
        case ST_OBJECT_TYPE_MEDIA_COLLECTION: 
                str = "ST_OBJECT_TYPE_MEDIA_COLLECTION"; 
            break;
        case ST_OBJECT_TYPE_MEDIA_CATEGORY: 
                str = "ST_OBJECT_TYPE_MEDIA_CATEGORY"; 
            break;
        case ST_OBJECT_TYPE_MEDIA_CARD: 
                str = "ST_OBJECT_TYPE_MEDIA_CARD"; 
            break;
        case ST_OBJECT_TYPE_MEDIA_TAG: 
                str = "ST_OBJECT_TYPE_MEDIA_TAG"; 
            break;
        case ST_OBJECT_TYPE_INFO_END: 
                str = "ST_OBJECT_TYPE_INFO_END"; 
            break;
        case ST_OBJECT_TYPE_CARDSTATS_CATEGORY: 
                str = "ST_OBJECT_TYPE_CARDSTATS_CATEGORY"; 
            break;
        case ST_OBJECT_TYPE_CONTENT: 
                str = "ST_OBJECT_TYPE_CONTENT"; 
            break;
        case ST_OBJECT_TYPE_MEDIA_COLLECTION_BUTTON: 
                str = "ST_OBJECT_TYPE_MEDIA_COLLECTION_BUTTON"; 
            break;
        default: 
                str ="UNKNOWN "+type;
            break;
        }

        return str;
    }

例外情况是：

09-08 09:53:08.744: WARN/System.err(2509): java.lang.IllegalArgumentException: no datatype with 001 exists
09-08 09:53:08.754: WARN/System.err(2509):     at com.stampii.stampii.comm.rpc.RPCCommucatorDefines$RPCOperationType.getByValue(RPCCommucatorDefines.java:34)
09-08 09:53:08.754: WARN/System.err(2509):     at com.stampii.stampii.user.UserLogin$2.onClick(UserLogin.java:122)
09-08 09:53:08.754: WARN/System.err(2509):     at android.view.View.performClick(View.java:2408)
09-08 09:53:08.754: WARN/System.err(2509):     at android.view.View$PerformClick.run(View.java:8817)
09-08 09:53:08.754: WARN/System.err(2509):     at android.os.Handler.handleCallback(Handler.java:587)
09-08 09:53:08.754: WARN/System.err(2509):     at android.os.Handler.dispatchMessage(Handler.java:92)
09-08 09:53:08.754: WARN/System.err(2509):     at android.os.Looper.loop(Looper.java:144)
09-08 09:53:08.754: WARN/System.err(2509):     at android.app.ActivityThread.main(ActivityThread.java:4937)
09-08 09:53:08.754: WARN/System.err(2509):     at java.lang.reflect.Method.invokeNative(Native Method)
09-08 09:53:08.754: WARN/System.err(2509):     at java.lang.reflect.Method.invoke(Method.java:521)
09-08 09:53:08.754: WARN/System.err(2509):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-08 09:53:08.764: WARN/System.err(2509):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-08 09:53:08.764: WARN/System.err(2509):     at dalvik.system.NativeStart.main(Native Method)

RPC类型代码：

public enum RPCOperationType {
        O_CREATE(1),
        O_UPDATE(2),
        O_DELETE(3);

        private int value;
        private intvalue1;
        private RPCOperationType(int i){
            this.value=i;
        }
        public int getNumericType(){
            return value;
        }
        public static RPCOperationType getByValue(int i) {
             for(RPCOperationType dt : RPCOperationType.values()) {
                 if(dt.value1 == i) {
                     return dt;
                 }
             }
             throw new IllegalArgumentException("no datatype with " + i + " exists");
         }

    }

那么，有什么建议可以在不更改枚举中的id的情况下解决此问题？

---

提前谢谢

您向我们展示的代码不会引发异常。堆栈跟踪显示异常发生的位置：

at com.stampii.stampii.comm.rpc.RPCCommucatorDefines$RPCOperationType.getByValue(RPCCommucatorDefines.java:34)

因此，在第34行对

RPCCommucatorDefines.java

中的

rpcopeOptionType.getByValue（）

的调用引发了此异常。当然，您传递的是一个字符串，而不是int，顺便说一句，因为不能像在异常的错误消息中那样将短变量打印为

001

---

堆栈跟踪的前两行是最重要的一行。第一行告诉您出了什么问题，第二行告诉您异常抛出的位置。

如果需要用零填充数字，您必须使用

您没有向我们展示任何有关枚举的信息，例如如何根据ID找到枚举值。在我看来，这是重要的一点……您是说抛出了

IllegalArgumentException

？是否抛出消息“不存在具有001的数据类型”？这不太有道理，因为INT不会以这种方式打印。你能准确地告诉我们你看到了什么吗？你是如何将pType传递给getByValue的？qstion更新了更多信息如果你解析字符串，显然00将被删除，因为它们根本不会改变值。您需要将其保留为字符串。getByValue方法中引发的异常与问题中显示的异常完全相同。否。如前所述，阅读堆栈跟踪，并向我们展示rpcopeOptionType.getByValue方法的代码，该方法位于RPCCommucatorDefines.java的第34行。这段代码不可能与您向我们展示的代码相同。我在getByValue中看到，我采用字符串类型，而不是int。因此，我将其编辑为字符串，现在错误为“不存在带1的数据类型”。如果您向我们展示枚举的真实代码以及调用它的代码，这将有所帮助。你给我们看的代码没有编译。在你的循环中，你将i转换为value1，而这个值从来没有被构造函数初始化过。将其与value进行比较。正如我所说的：从枚举中删除字段value1，并将I与value进行比较，而不是将循环中的value1进行比较。您的代码仍然不能按原样编译：您有一行“private intvalue1；”，而不是“private intvalue1；”