Java怎样把文件写入到客户端的硬盘上

发布网友发布时间：2022-04-26 10:19

共1个回答

热心网友时间：2022-06-27 07:09

package test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

public class Test {
    public static void main(String[] args) throws FileNotFoundException {
        String source = "hello world!";
        String filePath = "c:\\file.txt";
        String newFilePath = "c:\\" + System.currentTimeMillis() + ".txt";

        saveFile1(source);
        saveFile2(filePath, newFilePath);

    }

    /**
     * 直接写入数据
     * @param source
     * @return
     */
    public static boolean saveFile1(String source){
        byte buf[] = source.getBytes();
        try(FileOutputStream fs = new FileOutputStream("c:\\file.txt")){
            for (int i = 0; i < buf.length; i++) {
                fs.write(buf[i]);
            }
            return true;
        }catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }
    /**
     * 读取文件另存为
     * @param filePath
     * @param newFilePath
     * @return
     */
    public static boolean saveFile2(String filePath, String newFilePath){
        File file = new File(filePath);
        if (file.exists() && file.isFile()) {
            try (FileInputStream fi = new FileInputStream(file);
                 FileOutputStream fs = new FileOutputStream(newFilePath))
            {
                int buf;
                while ((buf = fi.read()) != -1) {
                    fs.write(buf);
                }
                return true;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return false;
    }
}