OutputStream output=response.getOutputStream();
while((len=in.read(b)) >0) {
output.write(b,0,len);
}
output.flush();
而不是把response.getOutputStream().write()放到循环体内
在页面中直接写：
复制代码 代码如下:
<body bgcolor="#ffffff">
<h1>
<%
response.getOutputStream();
%>
</h1>
</body>
将会出现错误消息如下：
java.lang.IllegalStateException: getOutputStream() has already been called for this response
org.apache.catalina.connector.Response.getWriter(Response.java:604)
org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:198)
org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125)
org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118)
以上就是tomcat6下jsp出现getOutputStream() has already been called for this response异常的原因和解决方法的全部内容，希望能给大家一个参考，也希望大家多多支持脚本之家。
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