解决Cannot forward after response has been committed

Posted rogear

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在是用request.getRequestDispatcher("目标地址URL").forward(request, response);时报错Cannot forward after response has been committed

字面意识是response已经提交过了不能再次提交，多次试了以后发现我的代码中有用了几次request.getRequestDispatcher("目标地址URL").forward(request, response);语句，执行到第一次的时候不会出错，后面会报错。另外应该注意该语句在使用的时候不是直接跳转页面，还会执行后面的代码。

解决方法方有两种：

1、在每个request.getRequestDispatcher("目标地址URL").forward(request, response);语句后面加一个return；

2、用一个对象装RequstDispatcher，在代码的最后使用forward方法。

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