jsp下载图片

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class DownloadImageServlet extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 图片文件路径
        String imagePath = "/path/to/your/image.jpg";
        
        // 获取文件输入流
        FileInputStream fileInputStream = new FileInputStream(imagePath);
        
        // 设置响应头
        response.setContentType("image/jpeg");
        response.setHeader("Content-Disposition", "attachment; filename=image.jpg");
        
        // 获取输出流
        OutputStream outputStream = response.getOutputStream();
        
        // 缓冲区
        byte[] buffer = new byte[4096];
        int bytesRead;
        
        // 读取文件并写入输出流
        while ((bytesRead = fileInputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }
        
        // 关闭流
        fileInputStream.close();
        outputStream.close();
    }
}