8 楼

Acaleph

2008-07-03

我的程序，虽然结果出来了，但后台总是抛错：

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java.lang.IllegalStateException: STREAM

at org.mortbay.jetty.Response.getWriter(Response.java:585)

at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:17

1)

at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.jav

a:164)

at org.apache.jasper.runtime.JspWriterImpl.flush(JspWriterImpl.java:219)

at org.apache.struts2.components.ActionComponent.end(ActionComponent.jav

a:150)

at org.apache.struts2.views.jsp.ComponentTagSupport.doEndTag(ComponentTa

gSupport.java:43)

at org.apache.jsp.Servlet_jsp._jspx_meth_s_action_0(org.apache.jsp.Servl

et_jsp:150)

at org.apache.jsp.Servlet_jsp._jspService(org.apache.jsp.Servlet_jsp:85)

at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:93)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper

.java:373)

at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:4

70)

at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:364)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487

)

at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:3

62)

at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.jav

a:216)

at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:1

81)

at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:7

26)

at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

at org.mortbay.jetty.servlet.Dispatcher.include(Dispatcher.java:192)

at org.apache.struts2.dispatcher.ServletDispatcherResult.doExecute(Servl

etDispatcherResult.java:141)

at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResul

tSupport.java:178)

at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(Default

ActionInvocation.java:348)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:253)

at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doInte

rcept(DefaultWorkflowInterceptor.java:221)

at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept

(MethodFilterInterceptor.java:86)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(V

alidationInterceptor.java:150)

at org.apache.struts2.interceptor.validation.AnnotationValidationInterce

ptor.doIntercept(AnnotationValidationInterceptor.java:48)

at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept

(MethodFilterInterceptor.java:86)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.interc

ept(ConversionErrorInterceptor.java:123)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept

(ParametersInterceptor.java:167)

at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept

(MethodFilterInterceptor.java:86)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.inter

cept(StaticParametersInterceptor.java:105)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(Checkbox

Interceptor.java:83)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUp

loadInterceptor.java:207)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(

ModelDrivenInterceptor.java:74)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.inte

rcept(ScopedModelDrivenInterceptor.java:127)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at org.apache.struts2.interceptor.ProfilingActivationInterceptor.interce

pt(ProfilingActivationInterceptor.java:107)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.interce

pt(DebuggingInterceptor.java:206)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(Cha

iningInterceptor.java:115)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInt

erceptor.java:143)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(Pr

epareInterceptor.java:121)

at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept

(MethodFilterInterceptor.java:86)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(Ser

vletConfigInterceptor.java:170)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasI

nterceptor.java:123)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.inter

cept(ExceptionMappingInterceptor.java:176)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:224)

at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(Default

ActionInvocation.java:223)

at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTim

erStack.java:455)

at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionI

nvocation.java:221)

at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.j

ava:50)

at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.jav

a:504)

at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatc

her.java:419)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet

Handler.java:1084)

at org.springframework.web.filter.CharacterEncodingFilter.doFilterIntern

al(CharacterEncodingFilter.java:96)

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR

equestFilter.java:75)

at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(Servlet

Handler.java:1084)

at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:3

60)

at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.jav

a:216)

at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:1

81)

at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:7

26)

at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)

at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHand

lerCollection.java:206)

at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.

java:114)

at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:1

52)

at org.mortbay.jetty.Server.handle(Server.java:324)

at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:50

5)

at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpCo

nnection.java:828)

at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)

at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)

at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)

at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.ja

va:395)

at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool

.java:450)

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程序代码

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package com.easybea.system.action;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.image.BufferedImage;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.Map;

import java.util.Random;

import javax.imageio.ImageIO;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.config.Result;

import org.apache.struts2.config.Results;

import org.apache.struts2.interceptor.ServletRequestAware;

import org.apache.struts2.interceptor.ServletResponseAware;

import org.apache.struts2.interceptor.SessionAware;

import com.opensymphony.xwork2.ActionSupport;

import com.sun.image.codec.jpeg.JPEGCodec;

import com.sun.image.codec.jpeg.JPEGImageEncoder;

@Results(@Result(name = "success", value = "/Servlet.jsp"))

public class SafeImageAction extends ActionSupport implements SessionAware,

ServletRequestAware, ServletResponseAware {

private Map session;

private HttpServletRequest request;

private HttpServletResponse response;

private BufferedImage image;

private ByteArrayOutputStream output;

private InputStream imageStream;

javax.servlet.ServletOutputStream imageOut;

private static final long serialVersionUID = 1L;

private static final String CHARARRAY[] = { "0", "1", "2", "3", "4", "5",

"6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i",

"j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",

"w", "x", "y", "z" };

public SafeImageAction() {

}

public String execute() throws IOException {

response.setContentType("image/jpeg");

response.setHeader("Pragma", "No-cache");

response.setHeader("Cache-Control", "no-cache");

response.setDateHeader("Expires", 0L);

output = new ByteArrayOutputStream();

// HttpSession session = request.getSession();

int width = 60;

int height = 20;

// image = new BufferedImage(width, height, 1);

image = new BufferedImage(width, height, BufferedImage.TYPE_3BYTE_BGR);

Graphics g = image.getGraphics();

Random random = new Random();

g.setColor(getRandColor(200, 250));

g.fillRect(0, 0, width, height);

g.setFont(new Font("Arial", 0, 19));

g.setColor(getRandColor(160, 200));

for (int i = 0; i < 155; i++) {

int x = random.nextInt(width + 100);

int y = random.nextInt(height + 100);

int xl = random.nextInt(10);

int yl = random.nextInt(12);

g.drawOval(x, y, x + xl, y + yl);

}

String sRand = "";

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

String rand = getRandChar(random.nextInt(36));

sRand = (new StringBuilder()).append(sRand).append(rand).toString();

g.setColor(new Color(20 + random.nextInt(110), 20 + random

.nextInt(110), 20 + random.nextInt(110)));

g.drawString(rand, 13 * i + 6, 16);

}

// session().setAttribute("rand", sRand);

// session.put("rand", sRand);

g.dispose();

try {

ImageIO.write(image, "jpg", output);

} catch (IOException e) {

System.out.println("生成验证码有误： " + e);

}

imageOut = response.getOutputStream();

JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(imageOut);

encoder.encode(image);

this.imageStream = new ByteArrayInputStream(output.toByteArray());

output.close();

return SUCCESS;

}

public void setServletResponse(HttpServletResponse response) {

this.response = response;

}

public void setServletRequest(HttpServletRequest request) {

this.request = request;

}

private 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);

}

private String getRandChar(int randNumber) {

return CHARARRAY[randNumber];

}

public void setSession(Map session) {

this.session = session;

}

public BufferedImage getImage() {

return image;

}

public void setImage(BufferedImage image) {

this.image = image;

}

public javax.servlet.ServletOutputStream getImageOut() {

return imageOut;

}

public void setImageOut(javax.servlet.ServletOutputStream imageOut) {

this.imageOut = imageOut;

}

}

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