jsp输出静态的图片

2个方式，jsp中直接输出静态图片：

 

img.jsp

<%@page import="javax.imageio.*"%>
<%@page import="java.awt.image.BufferedImage,java.io.*;"%>

<%
	File myGifFile = new File("e:\\aa\\haha.gif");
	BufferedImage bufi = ImageIO.read(myGifFile);
	response.reset();
	response.setContentType("image/gif");
	ImageIO.write(bufi, "gif", response.getOutputStream());
%>

 

 

img2.jsp

<%@page import="java.io.*;"%>
<%
	response.reset();
	response.setContentType("image/gif");
	response.setHeader("Cache-Control", "no-cache");
	response.setDateHeader("Expires", 0);
	java.io.FileInputStream fis = new java.io.FileInputStream(new File("e:\\aa\\haha.gif"));
	java.io.OutputStream os = response.getOutputStream();
	byte[] buf = new byte[4096];
	int bytes = 0;
	while ((bytes = fis.read(buf)) != -1)
		os.write(buf, 0, bytes);
	fis.close();
%>

 

 

评论

2 楼 spp_1987 2012-10-08  

<%@page import="java.net.URLDecoder"%>
<%@page import="java.io.File"%>
<%@page import="com.aj.general.web.JspUtils"%>
<%@ page info="Random Image Show" pageEncoding="UTF-8"
contentType="image/jpg" autoFlush="true" buffer="16kb"
import="java.io.FileInputStream"%>
<%  
String imgPath = URLDecoder.decode(request.getParameter("imgPath"), "utf-8");
ServletOutputStream sos = response.getOutputStream();  
FileInputStream fis = new FileInputStream(new File("c:\\qzimgs\\"+imgPath));  
byte[] buf = new byte[100];  //缓冲区大小  
int len = 0;  
while ((len = fis.read(buf)) != -1) {  
    sos.write(buf, 0, len);  
}  
sos.flush();  
sos.close();  
fis.close();
out.clear();
out=pageContext.pushBody();  

1 楼 spp_1987 2012-10-08  

如何 限制输出图片大小。 还有我的后台报错 出来一个异常：
严重: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:610)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:198)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118)