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修复 NoClassDefFoundError 的问题

src/main/java/com/ilummc/tlib/util/IO.java

@@ -0,0 +1,18 @@
+package com.ilummc.tlib.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class IO {
+
+    public static byte[] readFully(InputStream inputStream) throws IOException {
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        byte[] buf = new byte[1024];
+        int len = 0;
+        while ((len = inputStream.read(buf)) > 0) {
+            stream.write(buf, 0, len);
+        }
+        return stream.toByteArray();
+    }
+}