java.lang.IllegalStateException:getOutputStream() has alread

学习时间:2026-08-11 03:53:02 阅读：5523

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

轻松的白猫

2026-08-11 03:53:02

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esponse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);