Cannot forward after response has beencommitted问题分析及解决
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Cannot forward after response has beencommitted:
中文意思就是已经有提交了,不能够再次转向了,然后根据JSP标签中设置的错误页面又回到了登陆页面
中文意思就是已经有提交了,不能够再次转向了,然后根据JSP标签中设置的错误页面又回到了登陆页面
由于调用了父类的super.service(req, resp):
这是因为,doPost()[doXXX()]方法就是service()执行过程中判断用户访问方式(post、get等)后,调用的响应响应方法,即执行相应的doXXX()方法去响应用户,
而显示调用父类的doPost()方法,且先执行完,就等于已经响应了一次,然后又去跳转又去响应,就会报错重复提交。所以去掉super.service(req, resp);
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