添加io内容，ByteArrayInputStream

byhieg · byhieg · commit 6ad35e5a2bcc · 2017-02-21T23:52:28.000+08:00
diff --git a/src/main/java/cn/byhieg/iotutorial/bytestreamio/ByteArrayInputStreamExample.java b/src/main/java/cn/byhieg/iotutorial/bytestreamio/ByteArrayInputStreamExample.java
@@ -0,0 +1,50 @@
+package cn.byhieg.iotutorial.bytestreamio;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+
+/**
+ * Created by byhieg on 17/2/21.
+ * Mail to byhieg@gmail.com
+ */
+public class ByteArrayInputStreamExample {
+
+    public String readFromArray(byte[] bytes) {
+        StringBuffer sb = new StringBuffer();
+        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
+        int tmp;
+        while ((tmp = bais.read()) != -1) {
+            sb.append(Integer.toHexString(tmp));
+        }
+        return sb.toString();
+    }
+
+    public void readMarkAndReset(byte[] bytes,int mark) {
+        StringBuffer sb = new StringBuffer();
+        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
+        bais.mark(mark);
+
+        bais.skip(mark + 1);
+        int tmp;
+        while ((tmp = bais.read()) != -1) {
+            sb.append(Integer.toHexString(tmp));
+        }
+
+        System.out.println("越过标记后的字符串");
+        System.out.println(sb.toString());
+
+        bais.reset();
+        sb.setLength(0);
+
+        int m;
+        while ((m = bais.read()) != -1) {
+            sb.append(Integer.toHexString(m));
+        }
+
+        System.out.println("重置之后的字符串");
+        System.out.println(sb.toString());
+    }
+
+
+
+}
diff --git a/src/main/java/cn/byhieg/iotutorial/bytestreamio/read_file.txt b/src/main/java/cn/byhieg/iotutorial/bytestreamio/read_file.txt
@@ -0,0 +1,5 @@
+I don't know what I do now is right, those are wrong, and when I finally die then I know these.
+So what  I can do now is to try to do everything well, and then wait to die .
+Sometimes I can be very happy to talk to everyone, can be very presumptuous, but no one knows,
+it is but very deliberately camouflage, camouflage; I can make him very happy very happy,
+but couldn't find the source of happiness, just giggle.
diff --git a/src/test/java/cn/byhieg/iotutorialtest/ByteArrayInputStreamExampleTest.java b/src/test/java/cn/byhieg/iotutorialtest/ByteArrayInputStreamExampleTest.java
@@ -0,0 +1,25 @@
+package cn.byhieg.iotutorialtest;
+
+import cn.byhieg.iotutorial.bytestreamio.ByteArrayInputStreamExample;
+import junit.framework.TestCase;
+
+/**
+ * Created by byhieg on 17/2/21.
+ * Mail to byhieg@gmail.com
+ */
+public class ByteArrayInputStreamExampleTest extends TestCase {
+    public void testReadFromArray() throws Exception {
+        byte[] bytes = new byte[]{0x1,0x2,0x3,0x4,0x5,0x6,0x7};
+        ByteArrayInputStreamExample example = new ByteArrayInputStreamExample();
+        System.out.println(example.readFromArray(bytes));
+    }
+
+
+    public void testReadMarkAndReset() throws Exception {
+        byte[] bytes = new byte[]{0x1,0x2,0x3,0x4,0x5,0x6,0x7};
+        ByteArrayInputStreamExample example = new ByteArrayInputStreamExample();
+        example.readMarkAndReset(bytes,2);
+        System.out.println("++++++++++++++++++++");
+    }
+
+}
