java的io操作(将字符串写入到txt文件中)

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.FileWriter;

import java.io.IOException;

import java.io.PrintStream;

import java.io.PrintWriter;

import java.io.RandomAccessFile;

 

public class WriteStringToTxt {

    public void WriteStringToFile(String filePath) {

        try {

            File file = new File(filePath);

            PrintStream ps = new PrintStream(new FileOutputStream(file));

            ps.println("http://www.jb51.net");// 往文件里写入字符串

            ps.append("http://www.jb51.net");// 在已有的基础上添加字符串

        } catch (FileNotFoundException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    public void WriteStringToFile2(String filePath) {

        try {

            FileWriter fw = new FileWriter(filePath, true);

            BufferedWriter bw = new BufferedWriter(fw);

            bw.append("在已有的基础上添加字符串");

            bw.write("abc\r\n ");// 往已有的文件上添加字符串

            bw.write("def\r\n ");

            bw.write("hijk ");

            bw.close();

            fw.close();

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    public void WriteStringToFile3(String filePath) {

        try {

            PrintWriter pw = new PrintWriter(new FileWriter(filePath));

            pw.println("abc ");

            pw.println("def ");

            pw.println("hef ");

            pw.close();

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    public void WriteStringToFile4(String filePath) {

        try {

            RandomAccessFile rf = new RandomAccessFile(filePath, "rw");

            rf.writeBytes("op\r\n");

            rf.writeBytes("app\r\n");

            rf.writeBytes("hijklllll");

            rf.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

    public void WriteStringToFile5(String filePath) {

        try {

            FileOutputStream fos = new FileOutputStream(filePath);

            String s = "http://www.jb51.netl";

            fos.write(s.getBytes());

            fos.close();

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

    }

    public static void main(String[] args) {

        String filePath = "E:\\link.txt";

        // new WriteStringToTxt().WriteStringToFile(filePath);

        // new WriteStringToTxt().WriteStringToFile2(filePath);

        // new WriteStringToTxt().WriteStringToFile3(filePath);

        // new WriteStringToTxt().WriteStringToFile4(filePath);

        new WriteStringToTxt().WriteStringToFile5(filePath);

    }

}