📄 imaging_toweb.jsp

📁 J2EE独立开发制作

💻 JSP

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<%@ page autoFlush="false"  import="java.awt.*,java.awt.image.*,com.sun.image.codec.jpeg.*,java.util.*"%>
<%@ page contentType="text/html;charset=gb2312" %>
<%    
String ImageStr = request.getParameter("ID_Text");
if(ImageStr==null || ImageStr.equals(""))    
{        
response.setContentType("text/html; charset=gb2312"); 
%>
<HTML> 
<HEAD>  
<title>将JSP在内存生成的图片显示到页面</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("将JSP在内存生成的图片显示到页面",10,20);        
g.drawString("Author:sungx[sungxmail@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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