Java 输入输出流总结

1. 运用BufferedInputStream 读取文件流和BufferedOutputStream写文件流：

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) {
			}
		}
	}

 

2. BufferedReader 读取文件流和BufferedWriter写文件流：

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) {
			}
		}
	}