学步园

　　/**
     * 复制文件或文件夹下的文件到目标文件夹
     * */
private void copy(File src, File destDir) throws IOException {
if (!destDir.exists()) {
            destDir.mkdirs();
        } else if (!destDir.isDirectory()) {
throw new IOException("目标非文件夹");
        }

if (src.isFile()) {
            File destFile = new File(destDir, src.getName());
            BufferedInputStream in = null;
            BufferedOutputStream out = null;
try {
                in = new BufferedInputStream(new FileInputStream(src));
                out = new BufferedOutputStream(new FileOutputStream(destFile));
byte[] buf = new byte[1024];
int len = -1;
while ((len = in.read(buf)) != -1) {
                    out.write(buf, 0, len);
                }
                out.flush();
            } catch (IOException e) {
throw e;
            } finally {
if (in != null) try { in.close(); } catch (IOException e) {}
if (out != null) try { out.close(); } catch (IOException e) {}
            }

        } else {
            File[] srcFiles = src.listFiles();
for (int i = 0, len = srcFiles.length; i < len; i++) {
if (srcFiles[i].isFile()) copy(srcFiles[i], destDir);
else copy(srcFiles[i], new File(destDir, srcFiles[i].getName()));
            }
        }
    }