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: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:<!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 [email protected];
//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();
%>
下面是错误化码: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:<!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 [email protected];
//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();
%>
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());
out.clear();
out = pageContext.pushBody();
ImageIO.write(image,"JPEG",os);
os.flush();
os.close();
response.flushBuffer();
out.clear();
out = pageContext.pushBody();