如何使用java servlet从mysql数据库检索图像并在HTML img标签中显示它? [英] how to retrieve image from mysql database using java servlet and show it in HTML img tag?
问题描述
如何使用java servlet从mysql数据库检索图像并将其显示在HTML img标签中?并且该ima标签应该放在一个表定义里面?
编写一个servlet,将它映射到像 showImage.html
,将图片名称作为参数传递给您。
从文件中获取字节[/ b] how to retrieve image from mysql database using java servlet and show it in HTML img tag? and also that ima tag should be placed inside a table definition ? write a servlet, map it to a url like Then read the byte[] from file and write to response OutputStream in the servlet code. To get byte[] from file
这篇关于如何使用java servlet从mysql数据库检索图像并在HTML img标签中显示它?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!< img src =showImage.html然后从文件中读取byte [],并写入Servlet代码中的响应OutputStream。
response.getOutputStream()。write(bytes);
RandomAccessFile f = new RandomAccessFile(c:\images\pic1。 png,r);
byte [] bytes = new byte [(int)f.length()];
f.read(bytes);
response.getOutputStream()。write(bytes);
showImage.html
, pass the imagename as param <img src="showImage.html?filename=new.jpg">
response.getOutputStream().write(bytes);
RandomAccessFile f = new RandomAccessFile("c:\images\pic1.png", "r");
byte[] bytes = new byte[(int)f.length()];
f.read(bytes);
response.getOutputStream().write(bytes);