test.java

java文件操作

import java.io.*;
public class Test{
  /**
  * 以行为单位读取文件，常用于读面向行的格式化文件
  * @param fileName 文件名
  */
  public static void readFile(String fileName){
    File file = new File(fileName);
    BufferedReader reader = null;
    try {
      reader = new BufferedReader(new FileReader(file));
      String tempString = null;
      int fenzhi;
      int line = 1;
      while ((tempString = reader.readLine()) != null){
      	//tempString = reader.readLine();
      	//fenzhi= Integer.parseInt(tempString);
        System.out.println("line " + line + ": " + tempString);
        line++;
      }
      reader.close();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      if (reader != null){
        try {
          reader.close();
        } catch (IOException e1) {
        }
      }
    }
  }
  public static void main(String []args){
    readFile(args[0]);
  }
}