java一行一行写入或读取文件

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参考地址：

http://www.cnblogs.com/linjiqin/archive/2011/03/23/1992250.html

java中提供一行一行读取的类是 BufferedReader,其有一个readLine()方法。

java中提供一行一行写入的类是 BufferedWriter,其有一个write方法。

【读取文件】

public void readLineFile(String filename){try {FileInputStream in = new FileInputStream(filename);InputStreamReader inReader = new InputStreamReader(in, "UTF-8");BufferedReader bufReader = new BufferedReader(inReader);String line = null;int i = 1;while((line = bufReader.readLine()) != null){System.out.println("第" + i + "行：" + line);i++;}bufReader.close();inReader.close();in.close();} catch (Exception e) {e.printStackTrace();System.out.println("读取" + filename + "出错！");}}

【写入文件】

public void writeLineFile(String filename, String[] content){try {FileOutputStream out = new FileOutputStream(filename);OutputStreamWriter outWriter = new OutputStreamWriter(out, "UTF-8");BufferedWriter bufWrite = new BufferedWriter(outWriter);for (int i = 0; i < content.length; i++) {bufWrite.write(content[i] + "\r\n");}bufWrite.close();outWriter.close();out.close();} catch (Exception e) {e.printStackTrace();System.out.println("读取" + filename + "出错！");}}

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