Java读取文本指定的某一行内容,使用的都是IO的方法,下面具体看例子:
/**
* @author:罗大锤
* @date: 9月6日 下午2:35:43
* @version 1.0
* @method:读取文本具体某行内容
* @parameter
* @since
* @return
*/
public class OpenTextLine {
public static void main(String[] args) throws IOException {
long timeStart = System.currentTimeMillis();
File file = new File("testData.txt");//文件路径
FileReader fileReader = new FileReader(file);
LineNumberReader reader = new LineNumberReader(fileReader);
int number = 9999999;//设置指定行数
String txt = "";
int lines = 0;
while (txt != null) {
lines++;
txt = reader.readLine();
if (lines == number) {
System.out.println("第" + reader.getLineNumber() + "的内容是:" + txt + "\n");
long timeEnd = System.currentTimeMillis();
System.out.println("总共花费:" + (timeEnd - timeStart) + "ms");
System.exit(0);
}
}
reader.close();
fileReader.close();
}
}