大家帮忙看一下这段代码有什么问题？（路人甲也来看看吧！）

Question

对了，使用此页面的方法如下：
<img src="showimage.jsp?picture_id=1147">

Answer 1

(IE)Tools->Internet options->General->setting->Every time visit the page->apply

Answer 2

to:gzwrj(我无知,所以我有智慧.) 
还是不行呀

Answer 3

<%@ page import="java.util.Date,java.sql.*,com.brjl.database.*,oracle.sql.*"%>
<jsp:useBean id="param" scope="page" class="com.brjl.utils.ParamUtils"/>
<%
    int pictureId=param.getIntParameter(request,"picture_id",0);
    JdbcConnect myQuery=new JdbcConnect();
    ResultSet rs = myQuery.executeQuery("SELECT * FROM picture where picture_id="+pictureId);
    int length = 0;
    if (rs.next()) 
    {
        BLOB my_blob = (BLOB)rs.getObject("picture");
        length = (int)my_blob.length();
        byte [] byte_array  = my_blob.getBytes(1, length);        response.setContentType("image/jpeg");
    
        ServletOutputStream sos = response.getOutputStream();       for(int i=0;i<byte_array.length;i++)
       {
           sos.write(byte_array[i]);
       }
//****************************************************//
sos.flush();
//*****************************************************//
    }
    rs.close();
%>

Answer 4

现在图片到是完整的出来了，但是却经常出错，问题仍没有解决，错误如下：怎么办？A Servlet Exception Has Occurred
Exception Report:
javax.servlet.ServletException: Servlet execution threw an exception
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:225)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:251)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:196)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:242)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2038)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:414)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:159)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:811)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:890)
at java.lang.Thread.run(Thread.java:536)Root Cause:
java.lang.IllegalStateException: getOutputStream() has already been called for this response
at org.apache.catalina.connector.ResponseBase.getWriter(ResponseBase.java:628)
at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:166)
at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:158)
at org.apache.jasper.runtime.JspWriterImpl.flush(JspWriterImpl.java:205)
at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:216)
at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:114)
at _0002fshowimage_0002ejspshowimage_jsp_19._jspService(_0002fshowimage_0002ejspshowimage_jsp_19.java:127)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:181)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:393)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:251)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:196)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:242)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2038)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.valves.ValveBase.invokeNext(ValveBase.java:242)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:414)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:975)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:159)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:977)
at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:811)
at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:890)
at java.lang.Thread.run(Thread.java:536)HTTP/1.1 304 Not Modified Content-Length: 0 Connection: close Date: Tue, 30 Apr 2002 01:35:23 GMT Server: Apache Tomcat/4.0-m5 (HTTP/1.1 Connector)

Answer 5

你要使用sos.close()关闭输出流的呀!