据说是使用验证码页面出的错

再网上找了点,改了改.不过还是错.如下:

2010-8-11 23:08:48 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException
 at org.apache.catalina.connector.ResponseFacade.reset(ResponseFacade.java:310)
 at org.apache.jsp.jsp.image_jsp._jspService(image_jsp.java:133)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.qhit.wy.znt.filter.EncodingFilter.doFilter(EncodingFilter.java:23)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Thread.java:674)

那个at org.qhit.wy.znt.filter.EncodingFilter.doFilter(EncodingFilter.java:23)中的EncodingFilter是我写的一个过滤器类.我不是很懂.照猫画虎做的.

我操.没人回答.自己解决了.网上的说加入

 out.clear();
 out = pageContext.pushBody();

我加在了验证码页面的<%%>里的最后面.所以还是报错,只是少了一行

java.lang.IllegalStateException: getOutputStream() has already been called for this response　这个.

弄了一晚上,终于觉悟了.加在了<%%>里面最开始:

<%@ page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %>
<meta http-equiv="Content-Type" content="text/html"; charset="gbk">
<%!
Color getRandColor(int fc,int bc){
    Random random = new Random();
    if(fc>255) fc=255;
    if(bc>255) bc=255;
    int r=fc+random.nextInt(bc-fc);
    int g=fc+random.nextInt(bc-fc);
    int b=fc+random.nextInt(bc-fc);
    return new Color(r,g,b);
    }
%><%
 out.clear();
 out = pageContext.pushBody();
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);

int width=60, height=20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);.....　...

...

...　...

注意:黑体加粗的,文件开头部分最好加上那个.

　　两个<%%>　<%%>之间不要有空格和回车,更不要多余的东西,比如html标签...

　　接下来就看见加入的代码了...

不管是什么,总之我的问题是解决了,说的那么多,感觉有点迷信...不过我是怕了.怎么弄好怎么算.

希望大家有同样的问题能得到解决.