添加以下两段代码即可，我是在用jsp输出图像的时候出现这个问题
out.clear();
out = pageContext.pushBody();
附上我的输出图像的JSP代码
<%@ page info="Random Image Show" pageEncoding="UTF-8" contentType="image/jpg" autoFlush="true" buffer="16kb" session="false"
import="java.io.FileInputStream"%>
<%
ServletOutputStream sos = null;
if (sos == null) sos = response.getOutputStream();
FileInputStream fis = new FileInputStream((String) request.getAttribute("filename"));
byte[] buf = new byte[1024]; //缓冲区大小
int len = 0;
while ((len = fis.read(buf)) != -1) {
sos.write(buf, 0, len);
}
sos.flush();
sos.close();
fis.close();
out.clear();
out = pageContext.pushBody();
%>