【急】 getOutputStream() has already been called for this response

Question

java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.Response.getWriter(Response.java:611)
at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:198)
at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:112)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125)
at org.apache.jasper.runtime.JspWriterImpl.write(JspWriterImpl.java:276)
at java.io.PrintWriter.write(PrintWriter.java:354)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:119)
at org.apache.jasper.runtime.JspWriterImpl.write(JspWriterImpl.java:326)
at org.apache.jasper.runtime.JspWriterImpl.write(JspWriterImpl.java:342)
at com.opensymphony.module.sitemesh.parser.TokenizedHTMLPage.writeBody(TokenizedHTMLPage.java:35)
at com.opensymphony.module.sitemesh.taglib.decorator.BodyTag.doEndTag(BodyTag.java:26)
at org.apache.jsp.themes.faces.nh_005fface.decorators.DecoratorMain_jsp._jspx_meth_decorator_005fbody_005f0(DecoratorMain_jsp.java:535)
at org.apache.jsp.themes.faces.nh_005fface.decorators.DecoratorMain_jsp._jspService(DecoratorMain_jsp.java:315)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)
at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
at org.apache.jsp.decorators.DecoratorMain_jsp._jspService(DecoratorMain_jsp.java:53)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:551)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:488)
at com.opensymphony.module.sitemesh.filter.PageFilter.writeDecorator(PageFilter.java:173)
at com.opensymphony.module.sitemesh.filter.PageFilter.applyDecorator(PageFilter.java:158)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:62)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.smartdot.galaxy.portal.filter.auth.URLProtectionFilter.doFilter(Unknown Source)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.smartdot.galaxy.portal.filter.auth.AuthFilter.doFilter(Unknown Source)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.smartdot.galaxy.portal.filter.ShareLdapConnectionFilter.doFilter(Unknown Source)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at com.smartdot.util.server.SetCharacterEncodingFilter.doFilter(Unknown Source)
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:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
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:291)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:595)
2011-9-26 18:18:23 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet jsp threw exception

Answer 1

我的action中的方法
if (list != null && list.size() > 0) {
// 创建一个webbook，对应一个Excel文件
HSSFWorkbook wb = new HSSFWorkbook();
// 在webbook中添加一个sheet,对应Excel文件中的sheet
HSSFSheet sheet = wb.createSheet(intStartDate + "-"
+ intEndDate + "自营|资管重仓相似度");
// 在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short
HSSFRow row = sheet.createRow((int) 0);
// 创建单元格，并设置值表头 设置表头居中
HSSFCellStyle style = wb.createCellStyle();
style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式 HSSFCell cell = row.createCell((short) 0);
cell.setCellValue("日期");
cell.setCellStyle(style);
cell = row.createCell((short) 1);
cell.setCellValue("自");
cell.setCellStyle(style);
cell = row.createCell((short) 2);
cell.setCellValue("资");
cell.setCellStyle(style);
cell = row.createCell((short) 3);
cell.setCellValue("度");
cell.setCellStyle(style); // 写入实体数据
for (int i = 0; i < list.size(); i++) {
row = sheet.createRow((int) i + 1);
HeaveweightStock s = list.get(i);
// 创建单元格，并设置值
// row.createCell((short) 0).setCellValue(
// new SimpleDateFormat("yyyy-MM-dd").format(s
// .getSyncDate()));
if (s.getSyncDate() != "" || s.getSyncDate() != null) {
row.createCell((short) 0).setCellValue(
s.getSyncDate().substring(0, 4) + "-"
+ s.getSyncDate().substring(4, 6)
+ "-"
+ s.getSyncDate().substring(6, 8));
}
row.createCell((short) 1).setCellValue(
s.getZyStockCode());
row.createCell((short) 2).setCellValue(
s.getZgStockCode());
row.createCell((short) 3).setCellValue(
s.getSimilarity() + "%");
// 合并单元格 10个一组
if ((i - 1) % 10 == 0) {
sheet.addMergedRegion(new Region(i, (short) 0,
i + 9, (short) 0));
sheet.addMergedRegion(new Region(i, (short) 3,
i + 9, (short) 3));
}
}
// 将文件存到指定位置
try {
String filename = this.startDate + "至" + this.endDate;
response.setContentType("application/ms-excel");
response.setHeader("Content-Disposition",
"attachment;filename="
+ new String((filename + ".xls")
.getBytes(), "iso-8859-1"));
OutputStream outputStream = null;
response.flushBuffer();
outputStream = response.getOutputStream();
wb.write(outputStream);
outputStream.flush();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}

Answer 2

在outputstream.close();后加上下面两句: 
out.clear();
out = pageContext.pushBody();

Answer 3

out是什么?怎么出来的?
我的方法不在jsp页面上写
是在action中写的.

Answer 4

我的写法跟你一样，也是在java代码中做的，出现同样的问题，老兄，你是怎么解决的？请指教！