java.lang.IllegalStateException: attempt to re-open an already-closed object
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这个错误出现的原因是因为我在一个数据库操作的时候,在循环读取数据的时候,把datebase给close了,会出现这样的错误,还有一直情况就是我们在写数据库操作的时候,需要调用到其它函数的相关操作,当其它函数操作数据库关闭的时候,然后在直接执行自己写的代码,会有这个错误。
总结:在没操作数据库之前,先不要关闭相关连接。
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