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1. 鍒涘缓涓€涓?code>BufferedReader瀵硅薄锛屽皢鏂囦欢璺緞浣滀负鍙傛暟浼犻€掔粰瀹冪殑鏋勯€犲嚱鏁般€備緥濡傦紝BufferedReader reader = new BufferedReader(new FileReader("鏂囦欢璺緞"));
2. 浣跨敤readLine()鏂规硶鏉ヨ鍙栨枃浠剁殑姣忎竴琛屻€?code>readLine()鏂规硶浼氳繑鍥炴枃浠剁殑涓嬩竴琛屽唴瀹癸紝骞跺皢鎸囬拡绉诲姩鍒版枃浠剁殑涓嬩竴琛屻€傚彲浠ュ皢杩斿洖鐨勫唴瀹逛繚瀛樺埌涓€涓瓧绗︿覆鍙橀噺涓紝浠ヤ究杩涗竴姝ュ鐞嗐€?/li>
3. 浣跨敤涓€涓惊鐜紝涓嶆柇璋冪敤readLine()鏂规硶锛岀洿鍒板畠杩斿洖null锛岃〃绀烘枃浠跺凡缁忚鍙栧畬姣曘€?/li>
4. 鍦ㄥ惊鐜腑锛屽姣忎竴琛屽唴瀹硅繘琛屽鐞嗭紝渚嬪鎵撳嵃鍒版帶鍒跺彴鎴栧瓨鍌ㄥ埌闆嗗悎涓€?/li>

浠ヤ笅鏄竴涓ず渚嬩唬鐮侊紝婕旂ず濡備綍鎸夎璇诲彇鏂囦欢鍐呭锛?/p>

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class ReadFileLineByLine {
    public static void main(String[] args) {
        try {
            BufferedReader reader = new BufferedReader(new FileReader("鏂囦欢璺緞"));

            String line;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }

            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

璇锋敞鎰忥紝涓婅堪浠ｇ爜涓殑"鏂囦欢璺緞"闇€瑕佹浛鎹负瀹為檯鏂囦欢鐨勮矾寰勩€?/p>