refactor(set):优化SET命令的序列化实现

- 将FAST_HEADER数组替换为单一HEADER字节数组
- 移除基于键长度的快速写入逻辑- 简化RESP协议头的写入过程
- 统一使用动态长度写入方式处理键值对
- 提升代码可读性和维护性

Author: smthing

src/main/java/tech/smartboot/redisun/cmd/SetCommand.java

@@ -45,19 +45,7 @@ public class SetCommand extends Command {
     private static final BulkStrings CONSTANTS_EX = BulkStrings.of("EX");
     private static final BulkStrings CONSTANTS_PX = BulkStrings.of("PX");
     private static final BulkStrings CONSTANTS_PXAT = BulkStrings.of("PXAT");
-    //    private static final byte[] HEADER = new byte[]{RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK};
-    private static final byte[][] FAST_HEADER = new byte[][]{
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '0', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '1', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '2', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '4', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '5', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '6', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '7', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '8', '\r', '\n'},
-            {RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '9', '\r', '\n'},
-    };
+    private static final byte[] HEADER = new byte[]{RESP.RESP_DATA_TYPE_ARRAY, '3', '\r', '\n', RESP.RESP_DATA_TYPE_BULK, '3', '\r', '\n', 'S', 'E', 'T', '\r', '\n', RESP.RESP_DATA_TYPE_BULK};
     private static final byte[] PART = new byte[]{'\r', '\n', RESP.RESP_DATA_TYPE_BULK};
     // 要设置的键
     private final String key;
@@ -114,15 +102,8 @@ public void writeTo(WriteBuffer writeBuffer) throws IOException {
         }
         byte[] keyBytes = key.getBytes();
         byte[] valBytes = value.getBytes();
-        if (keyBytes.length < FAST_HEADER.length) {
-            writeBuffer.write(FAST_HEADER[keyBytes.length]);
-        } else {
-            byte[] header = FAST_HEADER[0];
-            writeBuffer.write(header, 0, header.length - 3);
-            RESP.writeInt(writeBuffer, keyBytes.length);
-        }
-//        writeBuffer.write(HEADER);
-//        RESP.writeInt(writeBuffer, keyBytes.length);
+        writeBuffer.write(HEADER);
+        RESP.writeInt(writeBuffer, keyBytes.length);
         writeBuffer.write(keyBytes);
         writeBuffer.write(PART);
         RESP.writeInt(writeBuffer, valBytes.length);

src/main/java/tech/smartboot/redisun/resp/RESP.java

@@ -56,7 +56,7 @@ public abstract class RESP<T> implements Serialization {
     public static final byte RESP_DATA_TYPE_ATTRIBUTE = '|';     // 属性 (RESP3)
     public static final byte RESP_DATA_TYPE_PUSH = '>';          // 推送消息 (RESP3)
 
-    protected static final byte[][] FAST_INT_WRITE = new byte[100][];
+    private static final byte[][] FAST_INT_WRITE = new byte[100][];
 
     static {
         for (int i = 0; i < FAST_INT_WRITE.length; i++) {