If the database connection fails, the connection error message may be output.

当数据库连接失败时，会输出连接错误消息。

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Look back at Listing 7 and notice that while errors are handled, it's only a very generic error message that is output to the user.

回头再来看一下清单7，并注意在对错误进行处理时，只将少数常见的错误消息输出给用户了。

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For example, when working with HTML output, you might want to redisplay the input form; however, when working with SOAP output, you'd probably want to display an error message instead.

例如，对于HTML输出，您可能想重新显示输入表单；但是，对于SOAP输出，您可能想要显示一条错误信息。

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