java基础-IO流-2（了解）

IO流中捕获异常

package Day07_IO; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; public class IOTest07 { public static void main(String[] args) throws IOException { //利用try catch finally拷贝文件中代码出现的异常 //一次读取一个字节数组的数据 FileInputStream fis=null; FileOutputStream fos=null; try { fis = new FileInputStream("E:\\java\\javase\\basic\\javadown\\a.txt"); fos = new FileOutputStream("E:\\file\\file1\\test\\copy.txt"); byte[] b = new byte[1024]; int len; while((len=fis.read(b))!=-1){ fos.write(b,0,len); } } catch (IOException e) { e.printStackTrace(); } finally { //释放资源 if(fis!=null){ try { fis.close(); } catch (IOException e) { throw new RuntimeException(e); } } if(fos!=null){ try { fos.close(); } catch (IOException e) { throw new RuntimeException(e); } } } } }

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