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.comrequest.setCharacterEncoding("GBK");response.setCharacterEncoding("GBK");response.setContentType("text/html; charset=GBK");%><%String chose="0123456789";//abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZchar 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(); %>[解决办法]
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());
[解决办法]
[解决办法]
- Java code
OutputStream os = response.getOutputStream();ImageIO.write(image,"JPEG",os);os.flush();os.close();response.flushBuffer();out.clear();out = pageContext.pushBody();