这么做之后，应该会看到类似清单5的结果。
After you do that, you should see something similar to Listing 5.
这么做之后，就消除了JDBC编程的繁琐，从而使您可以把注意力放在查询和查询结果上。
In so doing, it removes the drudgery from JDBC programming so that you can focus on queries and their results.
这样做的原因非常简单：对原始内容进行整理之后，可以得到一个很小的但是唯一的加密结果(称为摘要)，这样比对原始内容进行签名花费的时间少。
The reason for doing this is simple: Digesting the original content generates a small but unique encrypted value (digest) that takes less time to sign as compared to the original content.
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