游览器找不到服务器上PHP文件的一种原因

代码如下：

public class MyWork {
    public static void main(String[] args) throws IOException {
        FileInputStream input = new FileInputStream("input/Java的方向.png");
        FileOutputStream output = new FileOutputStream("output/Java.png");
        BufferedInputStream bInput = new BufferedInputStream(input);
        BufferedOutputStream bOutput = new BufferedOutputStream(output);
        byte[] b = new byte[1024];
        int len;
        while ((len = bInput.read(b)) != -1) {
            bOutput.write(b,0,len);
        }
        bOutput.close();
        bInput.close();
        output.close();
        input.close();
    }
}