Java 输入输出流总结

protected static void writeFile2(String inputPath, String outputPath) {
        BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        try {
            bis = new BufferedInputStream(new FileInputStream(inputPath));
            bos = new BufferedOutputStream(new FileOutputStream(outputPath));
            int buffer = 1024 * 1024;
            byte[] data = new byte[buffer];
            int len;
            while ((len = bis.read(data)) != -1) {
                bos.write(data, 0, len);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (bis != null) {
                    bis.close();
                }
                if (bos != null) {
                    bos.close();
                }
            } catch (IOException e) {
            }
        }
    }

protected static String readFile(String inputPath) {
        BufferedReader br = null;
        try {
            br = new BufferedReader(new InputStreamReader(new FileInputStream(
                    inputPath)));
            StringBuffer result = new StringBuffer();
            String lineString = null;
            while ((lineString = br.readLine()) != null) {
                result.append(lineString);
                result.append("\n");
            }
            return result.toString();

        } catch (IOException e) {
            e.printStackTrace();
            return null;
        } finally {
            try {
                if (br != null) {
                    br.close();
                }
            } catch (IOException e) {
            }
        }

    }

protected static void writeFile(String inputString, String outputPath)
            {
        BufferedWriter bw = null;
        try {
            bw = new BufferedWriter(new FileWriter(outputPath));
            bw.write(inputString);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (bw != null) {
                    bw.close();
                }
            } catch (IOException e) {
            }
        }
    }