数据库表中Image图像的页面显示
在主jsp或servelt或bean中：从数据库中查询Image字段，以byte数组形式读取
byte[] bytes = results
.getBytes(index);
session.setAttribute("imgBlob", bytes);
显示图像的servlet代码
public class ShowImage extends HttpServlet {
private static final String CONTENT_TYPE = "image/gif";
private transient final Log log = LogFactory.getLog(getClass());
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
if (log.isDebugEnabled()) {
log.debug("Entering 'showIcon' method");
}
try {
response.setContentType(CONTENT_TYPE);
byte[] bytes = (byte[]) request.getSession().getAttribute("imgBlob");
response.setContentLength(bytes.length);
ServletOutputStream op = response.getOutputStream();
op.write(bytes);
op.flush();
op.close();
} catch (Throwable e) {
log.error(e);
}
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
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web.xml中servelt映射：
<servlet>
<servlet-name>showImage</servlet-name>
<servlet-class>com.tjad.servlet.ShowImage</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>showImage</servlet-name>
<url-pattern>/showImage</url-pattern>
</servlet-mapping>
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在jsp页面中显示图像使用：
<img src="showImage" width="100" height="150"/>
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