The origin server did not find a current representation for the target resource or is not willing to

1.The origin server did not find a current representation for the target resource or is not willing to disclose that one exists。网页显示404错误这些天学习JavaWeb，一切进行的挺顺利的，但是偶尔网页总是报404错误，所以必须得解决一下他们。具体步骤，解决404. 2

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