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java-mysql 搭建时，看到教程 没有添加 Class.forName（``）;

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Release： 2016-06-06 09:39:32
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mysqljava异常

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教程里没有添加这句Class.forName("com.mysql.jdbc.Driver");是正常的，而我copy的代码，没有这句却报异常
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求助，是怎么个原因啊。
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mysql java 异常
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