Spring
书中描述，如下:
We believe that:
J2EE should be easier to use.
It is best to program to interfaces, rather than classes.Spring reduces to complexity cost of using interfaces to zero.
JavaBean offers a great way of configuring applications.
OO design is more important than any implementation technology, such as J2EE。
Checked exceptions are overused in Java. A platform should not force you to catch exceptions you unlikely to recover from Testability is essential and a platform such as spring should help make your code easier to test.
We aim that:
Spring should be a pleasure to use.
You application codes should not depend on Spring APIs.
Spring should not compete with good existing solutions, but should foster integration
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