Java中文件的操作

/*
 * Created on 2006-7-18, ReadFile.java
 */
package ite.com.stream.test;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**
 * 读取文件中的字符
 *
 * @author 覃忠君
 * @version 1.00, 2006-7-18
 *
 * @copyright 长沙亿泰科技有限公司 2006~2007
 */
public class ReadFile {
    public static void main(String[] args) {
        ReadFile rf = new ReadFile();
        rf.operationFile();
        rf.writerFileData();
        rf.readFileData();
    }

    public void operationFile() {
        File file = new File("file.txt");

        // 检查File.txt是否存在
        if (file.exists()) {
            // 删除file.txt档
            file.delete();
        } else {
            // 在目前的目录下建立一个名为file.txt的文字档
            try {
                file.createNewFile();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    public void writerFileData() {
        FileWriter fw = null;
        try {
            fw = new FileWriter("file.txt");
            // 将字串写入文件
            fw.write("大家好! \n");
            fw.write("祝大家学习JAVA愉快！\n");
            fw.write("希望大家能够深入了解JAVA技术！");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            if (null != fw) {
                try {
                    fw.close();
                    fw = null;
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

    }

    public void readFileData() {

        String filename = "file.txt";
        FileReader fr = null;
        try {
            fr = new FileReader(filename);
            int c = fr.read();

            // 判断是否已读到文件的结尾
            while (c != -1) {
                // 输出读取到的数据
                System.out.print((char) c);
                // 从文件中读取数据
                c = fr.read();

                // 判断是否为断行字节
                if (c == 13) {
                    System.out.println("*****断行字节*****");
                    // 略过一个字节
         &nb