java常用文件操作

import java.io.*;

/**
 * Created by archur on 2016/10/17.
 */
public class FileOperate {

    // 如果文件不存在会自己创建
    public static void writeFile(String fileName,String content,boolean isAppend){
        File file = new File(fileName);

        BufferedWriter bw = null;
        try {
            if (!file.exists()) {
                file.createNewFile();
            }

            bw = new BufferedWriter(new FileWriter(fileName,isAppend));
            bw.write(content);
        } catch (IOException e) {
            e.printStackTrace();
        } finally{
            file = null;
            try {
                bw.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    // 读文件以及统计文件行数
    public static int readFile(String fileName){
        int count = 0;
        File file = new File(fileName);

        BufferedReader br = null;
        try {
            br = new BufferedReader(new FileReader(fileName));
            String str = null;
            while((str = br.readLine())!=null){
                System.out.println(str);
                count++;
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                br.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return count;
    }

}