java.lang.IllegalStateException:getOutputStream() has already been called for this response这是什么错误?源代码:生成验证码
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![java.lang.IllegalStateException:getOutputStream() has already been called for this response这是什么错误?源代码:生成验证码](/uploads/image/z/12754243-19-3.jpg?t=java.lang.IllegalStateException%3AgetOutputStream%28%29+has+already+been+called+for+this+response%E8%BF%99%E6%98%AF%E4%BB%80%E4%B9%88%E9%94%99%E8%AF%AF%3F%E6%BA%90%E4%BB%A3%E7%A0%81%EF%BC%9A%E7%94%9F%E6%88%90%E9%AA%8C%E8%AF%81%E7%A0%81)
java.lang.IllegalStateException:getOutputStream() has already been called for this response这是什么错误?源代码:生成验证码
java.lang.IllegalStateException:getOutputStream() has already been called for this response
这是什么错误?源代码:生成验证码
java.lang.IllegalStateException:getOutputStream() has already been called for this response这是什么错误?源代码:生成验证码
response的outputStream已经被调用获取过了,不能重复调用response.getOutputStream方法.
这是在JSP里写的代码吧?JSP里有一个out变量,代表response的outputStream,试一试
ImageIO.write(image,"JPEG",out);