reading encoded JPEG Stream ?()-Java教程-爱易网页

reading encoded JPEG Stream ?()

日期：2014-05-17　浏览次数：20809 次

reading encoded JPEG Stream ?(在线等)
我的一个验证码，在本地测试的时候是没有问题的，但是放到服务器上去之后，会经常报这个错误。
下面是错误化码:

HTML code


ava.io.IOException: reading encoded JPEG Stream 
    at sun.awt.image.codec.JPEGImageEncoderImpl.writeJPEGStream(Native Method)
    at sun.awt.image.codec.JPEGImageEncoderImpl.encode(JPEGImageEncoderImpl.java:472)
    at sun.awt.image.codec.JPEGImageEncoderImpl.encode(JPEGImageEncoderImpl.java:228)
    at org.apache.jsp.pages.random_jsp._jspService(random_jsp.java:107)

下面是random.jsp的代码：

HTML code


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<%@ page autoFlush="false"  import="java.util.*,java.awt.*,java.awt.image.*,com.sun.image.codec.jpeg.*,java.util.*" %>

<%
//set Chinese Char 
//Cody by JarryLi@gmail.com;
//homepage:jiarry.126.com
request.setCharacterEncoding("GBK");
response.setCharacterEncoding("GBK");
response.setContentType("text/html; charset=GBK");
%>
<%
String chose="0123456789";
//abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
char display[]={'0',' ','0',' ','0',' ','0'},ran[]={'0','0','0','0'},temp;

Random rand=new Random();

for(int i=0;i<4;i++)
{

 temp=chose.charAt(rand.nextInt(chose.length()));

 display[i*2]=temp;

 ran[i]=temp;
 }
 
String random=String.valueOf(display);

session.setAttribute("random",String.valueOf(ran));
 %>
<%

        out.clear();
      
        response.setContentType("image/jpeg");
        response.addHeader("pragma","NO-cache");
        response.addHeader("Cache-Control","no-cache");
        response.addDateHeader("Expries",0);
        int width=80, height=30;
        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Graphics g = image.getGraphics();
        //以下填充背景颜色
        Color c = new Color(Integer.parseInt("000000",16));
        g.setColor(c);
        g.fillRect(0, 0, width, height);
       //设置字体颜色
        g.setColor(Color.WHITE);
        Font font=new Font("Arial",Font.PLAIN,20);
        g.setFont(font);
       // g.drawString(random,5,14);
        g.drawString(random,5,20);
        g.dispose();
        //ServletOutputStream outStream = response.getOutputStream();
        JPEGImageEncoder encoder =JPEGCodec.createJPEGEncoder(response.getOutputStream());
        encoder.encode(image);//就是报这个错误
 
         //outStream.close();
         out.clear();
         out = pageContext.pushBody();   
   %>

------解决方案--------------------
把这些去掉
JPEGImageEncoder encoder =JPEGCodec.createJPEGEncoder(response.getOutputStream());
encoder.encode(image);//就是报这个错误

//outStream.close();
out.clear();
out = pageContext.pushBody();
用这个试试,效果如何
ImageIO.write(image, "JPEG", response.getOutputStream());
------解决方案--------------------

探讨
把这些去掉
JPEGImageEncoder encoder =JPEGCodec.createJPEGEncoder(response.getOutputStream());
encoder.encode(image);//就是报这个错误

//outStream.close();
out.clear();
out = pageContext.pushBody();
用这个试试,效果如何
ImageIO.write(image, "JPEG", response.getOutputStream());

------解决方案--------------------

Java code

OutputStream os = response.getOutputStream();
ImageIO.write(imag

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reading encoded JPEG Stream ?()

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