使用JSP生成验证码，服务器上报错，请教原因? 400 报错
使用JSP生成验证码，服务器上报错，请教原因? 400 报错
项目需要用到验证码，其实也就是生成4个数字，本地是好的，能正常生成出来验证码图片，但是服务上不知道为什么会报错。所以想问下，这问题是出在哪儿？
生成验证码的代码（JSP) 如下：
<%@ page contentType="image/jpeg"
import="java.awt.*, java.awt.image.*,java.util.*,javax.imageio.*"
pageEncoding="GBK"%><%!
Color getRandColor(int fc,int bc){//给定范围获得随机颜色
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);
}
%><%
response.setContentType("image/jpeg");
response.setHeader("Pragma","No-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires", 0);
// 在内存中创建图象
int width=60, height=20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
// 获取图形上下文
Graphics g = image.getGraphics();
//生成随机类
Random random = new Random();
// 设定背景色
g.setColor(new Color(255,255,255));//白色
g.fillRect(0, 0, width, height);
//设定字体
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
//画边框
g.setColor(new Color(153,153,153));//灰色
g.drawRect(0,0,width-1,height-1);
g.setColor(new Color(163,208,233));//蓝色
for (int i=0;i<155;i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x,y,x+xl,y+yl);
}
// 取随机产生的认证码(4位数字)
String sRand="";
for (int j=0;j<4;j++){
String rand=String.valueOf(random.nextInt(10));
sRand+=rand;
g.setFont(new Font("Times New Roman",Font.PLAIN,19));
// 将认证码显示到图象中
g.setColor(new Color(153,153,153));//灰色
g.drawString(rand,13*j+6,16);
}
// 将认证码存入SESSION
session.setAttribute("ccode",sRand);
session.setAttribute("ccode_begin_time",new Long(System.currentTimeMillis()));
session.setAttribute("ccode_time",new Long(1000*60*3));
// 图象生效
g.dispose();
// 输出图象到页面
ImageIO.write(image, "JPEG", response.getOutputStream());
%> 错误信息为：
type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException at org.apache.jasper.servlet.JspServletWrapper.service(Unknown Source) at org.apache.jasper.servlet.JspServlet.serviceJspFile(Unknown Source) at org.apache.jasper.servlet.JspServlet.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationDispatcher.invoke(Unknown Source) at org.apache.catalina.core.ApplicationDispatcher.doForward(Unknown Source) at org.apache.catalina.core.ApplicationDispatcher.forward(Unknown Source) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263) at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:318) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at com.baosight.web.filter.ChangeCharsetFilter.doFilter(ChangeCharsetFilter.java:36) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.CertificatesValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContext.invoke(Unknown Source) at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorReportValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.AccessLogValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.coyote.tomcat4.CoyoteAdapter.service(Unknown Source) at org.apache.coyote.http11.Http11Processor.process(Unknown Source) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Unknown Source) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:605) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:677) at java.lang.Thread.run(Thread.java:534) root cause javax.servlet.ServletException at org.apache.jasper.runtime.PageContextImpl.handlePageException(Unknown Source) at org.apache.jsp.ccode_jsp._jspService(ccode_jsp.java:130) at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServletWrapper.service(Unknown Source) at org.apache.jasper.servlet.JspServlet.serviceJspFile(Unknown Source) at org.apache.jasper.servlet.JspServlet.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationDispatcher.invoke(Unknown Source) at org.apache.catalina.core.ApplicationDispatcher.doForward(Unknown Source) at org.apache.catalina.core.ApplicationDispatcher.forward(Unknown Source) at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063) at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263) at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:318) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at com.baosight.web.filter.ChangeCharsetFilter.doFilter(ChangeCharsetFilter.java:36) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Unknown Source) at org.apache.catalina.core.ApplicationFilterChain.doFilter(Unknown Source) at org.apache.catalina.core.StandardWrapperValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContextValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.jboss.web.tomcat.security.JBossSecurityMgrRealm.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.CertificatesValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.jboss.web.tomcat.tc4.statistics.ContainerStatsValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardContext.invoke(Unknown Source) at org.apache.catalina.core.StandardHostValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorDispatcherValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.ErrorReportValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.valves.AccessLogValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.catalina.core.StandardEngineValve.invoke(Unknown Source) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(Unknown Source) at org.apache.catalina.core.StandardPipeline.invoke(Unknown Source) at org.apache.catalina.core.ContainerBase.invoke(Unknown Source) at org.apache.coyote.tomcat4.CoyoteAdapter.service(Unknown Source) at org.apache.coyote.http11.Http11Processor.process(Unknown Source) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Unknown Source) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:605) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:677) at java.lang.Thread.run(Thread.java:534)JSP的CLass文件，我看上面的提示说是130出错了,但无从下手，不好找：
package org.apache.jsp;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.List;
import java.util.Random;
import java.util.Vector;
import javax.imageio.ImageIO;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.JspFactory;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import org.apache.jasper.runtime.HttpJspBase;
public class ccode_jsp extends HttpJspBase
{
private static Vector _jspx_includes;
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);
}
public List getIncludes()
{
return _jspx_includes;
}
public void _jspService(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
JspFactory _jspxFactory = null;
PageContext pageContext = null;
HttpSession session = null;
ServletContext application = null;
ServletConfig config = null;
JspWriter out = null;
Object page = this;
JspWriter _jspx_out = null;
try
{
_jspxFactory = JspFactory.getDefaultFactory();
response.setContentType("text/html;charset=GBK");
pageContext = _jspxFactory.getPageContext(this, request, response, null, true, 8192, true);
application = pageContext.getServletContext();
config = pageContext.getServletConfig();
session = pageContext.getSession();
out = pageContext.getOut();
_jspx_out = out;
response.setContentType("image/jpeg");
response.setHeader("Pragma", "No-cache");
response.setHeader("Cache-Control", "no-cache");
response.setDateHeader("Expires", 0L);
int width = 60; int height = 20;
BufferedImage image = new BufferedImage(width, height, 1);
Graphics g = image.getGraphics();
Random random = new Random();
g.setColor(new Color(255, 255, 255));
g.fillRect(0, 0, width, height);
g.setFont(new Font("Times New Roman", 0, 18));
g.setColor(new Color(153, 153, 153));
g.drawRect(0, 0, width - 1, height - 1);
g.setColor(new Color(163, 208, 233));
for (int i = 0; i < 155; i++) {
int x = random.nextInt(width);
int y = random.nextInt(height);
int xl = random.nextInt(12);
int yl = random.nextInt(12);
g.drawLine(x, y, x + xl, y + yl);
}
String sRand = "";
for (int j = 0; j < 4; j++) {
String rand = String.valueOf(random.nextInt(10));
sRand = sRand + rand;
g.setFont(new Font("Times New Roman", 0, 19));
g.setColor(new Color(153, 153, 153));
g.drawString(rand, 13 * j + 6, 16);
}
session.setAttribute("ccode", sRand);
session.setAttribute("ccode_begin_time", new Long(System.currentTimeMillis()));
session.setAttribute("ccode_time", new Long(180000L));
g.dispose();
ImageIO.write(image, "JPEG", response.getOutputStream());
}
catch (Throwable t)
{
out = _jspx_out;
if ((out != null) && (out.getBufferSize() != 0))
out.clearBuffer();
if (pageContext != null) pageContext.handlePageException(t); //130
}
finally {
if (_jspxFactory != null) _jspxFactory.releasePageContext(pageContext);
}
}
} 不知道意思说清楚了没有，就是这个通过一个jsp生成验证码图片，我本地能出来，但是服务器上就会报第二段代码的错误。
有没有谁遇到过类似的问题啊？
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https://developer.aliyun.com/profile/5yerqm5bn5yqg?spm=a2c6h.12873639.0.0.6eae304abcjaIB已解决，据说是流的冲突造成的。
添加以下代码，便好了。
OutputStream os = response.getOutputStream(); ImageIO.write(image, "JPEG", os); os.flush(); os.close(); os=null; response.flushBuffer(); out.clear(); out = pageContext.pushBody();
2020-06-03 20:47:04赞同 展开评论 打赏
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