AOP (Aspect-Oriented Programming) is generally translated into aspects of programming, but I don't touch so much, why not translate to 'face-oriented program'. Forget it, you are not authority, first experience it again.
Basic concept a lot, I have not much height, the most direct understanding, this thing can "intercept" part of the Java code (such as a method), insert external code when compiling.
When programming, this is often encountered: different methods in different classes may call the same public method. In OOP, this is unable to count, do not know how many classes, which classes call this method (unless you specifically write parameters for statistics, but this can only know during operation, statistics are incomplete At the same time, this reciprocated code cannot be reused, which makes people feel very uncomfortable. Indeed, OOP seems to have some neutral, perhaps AOP can solve this problem. I just tried it today, I came here to publish a pass, if there is something wrong, I hope that criticism is correct. I have seen a few installations, to create a directory and bat file, trouble, maybe it is different, I have a very simple installation. Gossip less, let's step by step.
1. Install:
Aspectj current version download
http://download.eclipse.org/technology/ajdt/dev/aspectj-development.jar
After downloading, such as saving to d: / download / java / aspectj, enter the directory, enter java -jar aspectj-development.jar in the command line (originally thinking, but here Upload Old is there was an error), then Next, select the JDK directory, select the installation directory, the next step is installed, for example, install it to C: /ASPectj1.5
2. Configuration: Add C: /AspectJ1.5/lib/aspectjrt.jar; join ClassPath and add C: /ASPECTJ1.5/bin to Path
3. Instance: Enter C: /ASPectj1.5/doc/examples, type ajc -sourceroots bean in the command line, indicating that all files under the BEAN.
After completing the completion, execute java bean.demo, as follows:
P1 = (0, 0)
Property X Changed from 0.0 to 5.0
Property Y Changed from 0.0 to 2.0
P1 = (5, 2)
Property X Changed from 5.0 to 6.0
Property Y Changed from 2.0 to 3.0
P1 = (6, 3)
Property X Changed from 6.0 to 12.0
Property Y Changed from 3.0 to 7.0
P1 = (12, 7)
Writing to file: (12, 7)
Reading from file: Test.tmp
Had: (12, 7)
Got: (12, 7)
How, simple.
Specific code analysis will be given in the following.
Related article links
http://www.jdon.com/aopdesign/jdon-aop.htm
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