Java. Lang. illegalstateexception: getwriter () has already been called for this response solution

Java. Lang. illegalstateexception: getwriter () has already been called for this response

Perform the followingCodeAn error is reported,

Outputstream out = getresponse (). getoutputstream ();

 

The reason is that response. getwriter () is opened in the Code and is not closed. It is difficult to troubleshoot one by one because there are many call points.

View the code and see usingwriter = true in response. Then you can set this flag to false.

Response. Reset ();. Pay attention that the cache disappears after reset and the settings disappear.

 

Outputstream and writer cannot be obtained at the same time in a response.