将JSP在内存生成的图片显示到页面
imaging_toweb.jsp
<%@ page autoflush="false" import="java.awt.*,java.awt.image.*,com.sun.image.codec.jpeg.*,java.util.*"%>
<%
string imagestr = request.getparameter("id_text");
if(imagestr==null || imagestr.equals(""))
{
response.setcontenttype("text/html; charset=gb2312");
%>
<html>
<head>
<title>http://www.lionsky.net</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
</head>
<body>
<form id="form1" method="post">
<input type="text" id="id_text" name=id_text>
<input type=submit value="go">
</form>
</body>
</html>
<%
}
else
{
out.clear();
response.setcontenttype("image/jpeg");
response.addheader("pragma","no-cache");
response.addheader("cache-control","no-cache");
response.adddateheader("expries",0);
int width=300, height=100;
bufferedimage image = new bufferedimage(width, height, bufferedimage.type_int_rgb);
graphics g = image.getgraphics();
//以下填充背景颜色
g.setcolor(color.lightgray);
g.fillrect(0, 0, width, height);
string random="random";
//以下设置前景色
g.setcolor(color.black);
g.drawstring("http://www.knowsky.com",10,20);
g.drawstring("author:lion[lion-a@sohu.com]",10,40);
g.drawline(10,50,290,50);
g.drawstring(imagestr,10,70);
g.dispose();
servletoutputstream outstream = response.getoutputstream();
jpegimageencoder encoder =jpegcodec.createjpegencoder(outstream);
encoder.encode(image);
outstream.close();
}
%>
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