通过java的i/o机制进行图片流的存储

Posted 2020-10-30 明明一颗大白菜

思路：首先把原有的图片以流的方式读取出来，再以流的方式存储到目标文件：

package imgStream;

import java.io.*;

public class ImgStream {
    public static void main(String srga[]) {
        File source = new File("user.jpg");
        File desk = new File("G:\\learn\\javademoS\\imgs");
        if (!desk.exists()) {
            desk.mkdir();
        }
        try {
            FileInputStream inputStream = new FileInputStream(source);
            FileOutputStream outputStream = new FileOutputStream(new File("G:\\learn\\javademoS\\imgs\\fang.jpg"));
            int ch = inputStream.read();
            while (ch != -1) {//当流结束时返回-1
                outputStream.write(ch);
                ch = inputStream.read();
            }
            inputStream.close();
            outputStream.close();
            System.out.println("写入流成功");
        } catch (FileNotFoundException e) {
            System.out.println("文件不存在：" + e.getMessage());
        } catch (IOException e) {
            System.out.println("文件读取错误：" + e.getMessage());
        }
    }
}