文件读写

import java.io.*;

public class FileIO {

    public static void writeFileLine(String file,String data) throws IOException {
        BufferedWriter bw=null;
        try {
            bw=new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file,true),"utf-8"));
            bw.write(data);
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(bw !=null){
                bw.close();
            }
        }
    }

    public static void readFileLine(String fileName) throws IOException {
        try {
            File file=new File(fileName);
            BufferedReader br=new BufferedReader(new FileReader(file));
            String strLine=null;
            int line=1;
            while (null !=(strLine = br.readLine())){
                System.out.println(strLine);
                line++;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}