java中怎么把资料存放在磁盘里?

发布网友发布时间：2022-05-27 18:14

共2个回答

热心网友时间：2023-11-13 07:25

//写入文件方法，参数：文件名，待写入字符串数组，是否追加到文件
public void writeLinesToFile(String filename,String[] linesToWrite,boolean appendToFile)
{
PrintWriter pw = null;
try {

if (appendToFile) {

//If the file already exists, start writing at the end of it.
pw = new PrintWriter(new FileWriter(filename, true));

}
else {
pw = new PrintWriter(new FileWriter(filename));
//this is equal to:
//pw = new PrintWriter(new FileWriter(filename, false));

}

for (int i = 0; i < linesToWrite.length; i++) {
pw.println(linesToWrite[i]);

}
pw.flush();

}
catch (IOException e) {
e.printStackTrace();
}
finally {

//Close the PrintWriter
if (pw != null)
pw.close();

}

}

热心网友时间：2023-11-13 07:25

文件流呀，你先把你从控制台得到的数据保存起来，再写到流里追问能给张截图吗？

追答int chinese;
StringBuffer sb = new StringBuffer();
Scanner sc = new Scanner(System.in);
System.out.println("请输入您的语文成绩：");
chinese = sc.nextInt();
System.out.println("您的语文成绩："+chinese);
sb.append("Chinese:"+chinese);
File file = new File("d:\\stu.txt");
if(!file.exists()){
file.createNewFile();
}
FileOutputStream fos = new FileOutputStream(file);
fos.write(sb.toString().getBytes());
fos.close();