s-day09-JDK7之前IO异常的处理方式(重点)

2026-08-11 13:53:42 +08:00
parent 5dabbccb3b
commit 572c6ddedd
1 changed files with 49 additions and 0 deletions
@@ -0,0 +1,49 @@
+package com.inmind.io_exception05;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+/*
+JDK7之前IO异常的处理方式(重点)
+ */
+public class Demo13 {
+    public static void main(String[] args)  {
+        FileInputStream fis = null;
+        FileOutputStream fos = null;
+        try {
+            //文件复制（边读边写）
+            fis = new FileInputStream("3.jpg");
+            fos = new FileOutputStream("4.jpg");
+
+            byte[] bytes = new byte[1024];
+            int len;
+
+            while ((len = fis.read(bytes)) != -1) {
+                fos.write(bytes, 0, len);
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }finally {
+            //资源的释放
+            if (fis != null) {
+                try {
+                    fis.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+                fis = null;//避免内存泄漏
+            }
+
+            if (fos != null) {
+                try {
+                    fos.close();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+                fos = null;
+            }
+
+        }
+    }
+}