<%@page import="java.io.OutputStream"%>

<%@page import="java.io.FileInputStream"%>

<%@page import="java.io.InputStream"%>

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%

String path=request.getRealPath("/");

response.setContentType("image/png");

InputStream is=new FileInputStream(path+"img/2.png");

byte[] content=new byte[is.available()];

is.read(content);

OutputStream os=response.getOutputStream();

os.write(content,0,content.length);

%>

一月 12, 2018 11:45:53 上午 org.apache.catalina.core.StandardWrapperValve invoke

严重: Servlet.service() for servlet [jsp] in context with path [/jsp2] threw exception [java.lang.IllegalStateException: getOutputStream() has already been called for this response] with root cause

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

    at org.apache.catalina.connector.Response.getWriter(Response.java:624)

    at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:211)

    at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:118)

    at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:111)

    at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:184)

    at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:120)

    at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:75)

    at org.apache.jsp.重新定向_jsp._jspService(重新定向_jsp.java:143)

    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)

    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:443)

    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:386)

    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:330)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)

    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)

    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)

    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)

    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)

    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Unknown Source)

 /*

  * Generated by the Jasper component of Apache Tomcat

  * Version: Apache Tomcat/8.5.24

  * Generated at: 2018-01-12 04:05:33 UTC

  * Note: The last modified time of this file was set to

  *       the last modified time of the source file after

  *       generation to assist with modification tracking.

  */

 package org.apache.jsp;

 import javax.servlet.*;

 import javax.servlet.http.*;

 import javax.servlet.jsp.*;

 import java.io.OutputStream;

 import java.io.FileInputStream;

 import java.io.InputStream;

 public final class 重新定向_jsp extends org.apache.jasper.runtime.HttpJspBase

     implements org.apache.jasper.runtime.JspSourceDependent,

                  org.apache.jasper.runtime.JspSourceImports {

   private static final javax.servlet.jsp.JspFactory _jspxFactory =

           javax.servlet.jsp.JspFactory.getDefaultFactory();

   private static java.util.Map<java.lang.String,java.lang.Long> _jspx_dependants;

   private static final java.util.Set<java.lang.String> _jspx_imports_packages;

   private static final java.util.Set<java.lang.String> _jspx_imports_classes;

   static {

     _jspx_imports_packages = new java.util.HashSet<>();

     _jspx_imports_packages.add("javax.servlet");

     _jspx_imports_packages.add("javax.servlet.http");

     _jspx_imports_packages.add("javax.servlet.jsp");

     _jspx_imports_classes = new java.util.HashSet<>();

     _jspx_imports_classes.add("java.io.OutputStream");

     _jspx_imports_classes.add("java.io.FileInputStream");

     _jspx_imports_classes.add("java.io.InputStream");

   }

   private volatile javax.el.ExpressionFactory _el_expressionfactory;

   private volatile org.apache.tomcat.InstanceManager _jsp_instancemanager;

   public java.util.Map<java.lang.String,java.lang.Long> getDependants() {

     return _jspx_dependants;

   }

   public java.util.Set<java.lang.String> getPackageImports() {

     return _jspx_imports_packages;

   }

   public java.util.Set<java.lang.String> getClassImports() {

     return _jspx_imports_classes;

   }

   public javax.el.ExpressionFactory _jsp_getExpressionFactory() {

     if (_el_expressionfactory == null) {

       synchronized (this) {

         if (_el_expressionfactory == null) {

           _el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();

         }

       }

     }

     return _el_expressionfactory;

   }

   public org.apache.tomcat.InstanceManager _jsp_getInstanceManager() {

     if (_jsp_instancemanager == null) {

       synchronized (this) {

         if (_jsp_instancemanager == null) {

           _jsp_instancemanager = org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(getServletConfig());

         }

       }

     }

     return _jsp_instancemanager;

   }

   public void _jspInit() {

   }

   public void _jspDestroy() {

   }

   public void _jspService(final javax.servlet.http.HttpServletRequest request, final javax.servlet.http.HttpServletResponse response)

       throws java.io.IOException, javax.servlet.ServletException {

     final java.lang.String _jspx_method = request.getMethod();

     if (!"GET".equals(_jspx_method) && !"POST".equals(_jspx_method) && !"HEAD".equals(_jspx_method) && !javax.servlet.DispatcherType.ERROR.equals(request.getDispatcherType())) {

       response.sendError(HttpServletResponse.SC_METHOD_NOT_ALLOWED, "JSPs only permit GET POST or HEAD");

       return;

     }

     final javax.servlet.jsp.PageContext pageContext;

     javax.servlet.http.HttpSession session = null;

     final javax.servlet.ServletContext application;

     final javax.servlet.ServletConfig config;

     javax.servlet.jsp.JspWriter out = null;

     final java.lang.Object page = this;

     javax.servlet.jsp.JspWriter _jspx_out = null;

     javax.servlet.jsp.PageContext _jspx_page_context = null;

     try {

       response.setContentType("text/html; charset=UTF-8");

       pageContext = _jspxFactory.getPageContext(this, request, response,

                   null, true, 8192, true);

       _jspx_page_context = pageContext;

       application = pageContext.getServletContext();

       config = pageContext.getServletConfig();

       session = pageContext.getSession();

       out = pageContext.getOut();

       _jspx_out = out;

       out.write("\r\n");//注意此处out被调用

       out.write("\r\n");

       out.write("\r\n");

       out.write("\r\n");

 String path=request.getRealPath("/");

 response.setContentType("image/png");

 InputStream is=new FileInputStream(path+"img/2.png");

 byte[] content=new byte[is.available()];

 is.read(content);

 OutputStream os=response.getOutputStream();

 os.write(content,0,content.length);

     } catch (java.lang.Throwable t) {

       if (!(t instanceof javax.servlet.jsp.SkipPageException)){

         out = _jspx_out;

         if (out != null && out.getBufferSize() != 0)

           try {

             if (response.isCommitted()) {

               out.flush();

             } else {

               out.clearBuffer();

             }

           } catch (java.io.IOException e) {}

         if (_jspx_page_context != null) _jspx_page_context.handlePageException(t);

         else throw new ServletException(t);

       }

     } finally {

       _jspxFactory.releasePageContext(_jspx_page_context);

     }

   }

 }