java中一行太长怎么办? java文件一行一行读取

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！");
		}		
	}