此次提交的代码展示了一个简单的字节流处理示例，以及注释掉的并发处理代码。主要目的是通过ByteArrayInputStream从字符串构建字节流，然后使用循环读取字节流并打印出来。虽然提交的代码不包含实际的线程池使用，但通过注释可以看出，原先可能存在对线程池的测试代码。此代码片段作为一个基础，可能用于测试或演示Java中的IO处理和并发编程。

src/main/java/cn/whaifree/test/TestCacheThreadPool.java

@@ -0,0 +1,48 @@
+package cn.whaifree.test;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.nio.charset.Charset;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class TestCacheThreadPool {
+
+    public static void main(String[] args) throws IOException {
+
+        StringBuilder stringBuilder = new StringBuilder();
+        for (int i = 0; i < 20; i++) {
+            stringBuilder.append(i);
+        }
+        ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(stringBuilder.toString().getBytes(Charset.defaultCharset()));
+
+        byte[] buffer = new byte[10];
+        int length = 0;
+
+        while ((length = byteArrayInputStream.read(buffer)) != -1) {
+            System.out.println(new String(buffer, 0, length));
+            System.out.println("\n");
+        }
+
+//        ExecutorService executorService = Executors.newCachedThreadPool();
+//        for (int i = 0; i < 10; i++) {
+//            int finalI = i;
+//            executorService.submit(new Runnable() {
+//                @Override
+//                public void run() {
+//                    try {
+//                        Thread.sleep(1000);
+//                    } catch (InterruptedException e) {
+//                        throw new RuntimeException(e);
+//                    }
+//
+//                    System.out.println(finalI
+//                            +"   "+Thread.currentThread().getName());
+//                }
+//            });
+//        }
+    }
+
+
+}