Individual projects -WC.exe (Java implementation)

A, Github project Address: https://github.com/blanche789/wordCount/tree/master/src/main/java/com/blanche

Two, PSP form

PSP2.1	SUMMARY	Plans to complete the required time (min)	The actual time required for completion (min)
Planning	plan	45	40
Estimate	It estimated that the task requires much time and planning generally work steps	45	40
Development	Develop	880	940
Analysis	Needs analysis (including learning new technologies)	60	90
Design Spec	Generate design documents	30	-
Design Review	Design review (and colleagues reviewed the design documents)	10	-
Coding Standard	Code specifications (development of appropriate norms for the current development)	40	40
Design	Specific design	60	80
Coding	Specific coding	400	500
Code Review	Code Review	30	30
is	Test (self-test, modify the code, submit modifications)	250	200
Reporting	report	450	450
Test Report	testing report	360	370
Size Measurement	Computing workload	30	-
Postmortem & Process Improvement Plan	Later summarized, and process improvement plan	60	80
Summary	total	1375	1430

Third, the problem-solving ideas description

1, a strange development needs: at the time just to get this topic, in general, is more abstract; because in the past development, are based on a graphical interface as the primary mode of interaction, but this is to be a command line control commands to interact, so that the entire development process architecture needs to change. In the past, are the first to write graphical interface, and then make the appropriate corresponding interactive interface; and command the face of development, it needs to be the main function as the center, when the incoming commands, calls the corresponding logic operations

2, architecture design: The project I'm still using the traditional MVC development model to develop, but the view of the supplement to the main function-oriented; this project for about three minutes, the main function for the layer ( the entry code), view as a layer (-s meet demand), service to one (logic processing various needs). Wherein the service layer to the main processing logic

3, provides the interface: Since this needs six (six instructions), which relates to the output of the statistical results are four requirements. So, I designed four service implementation class (implement) in the service layer, mainly to address the needs of four instructions. Since the method to achieve four classes are the same, so I designed an interface. Using Java polymorphic thought convenient to call the method through four call interface implementation class, to avoid redundancy code

4, the regular expression refresher: When I see the demand has lines of code, comment lines, blank line, I certainly understand the need for regular expressions to match a corresponding read to judge the string, so it is necessary regular expressions learning knowledge. Secondly string to match the need to determine which methods of String Java API has about regular expressions

5, enumerate: Since a plurality of instructions, if instructions are required to judge a call that the entity class, will increase the time complexity. So I will enumerate store eight instructions, instruction and then to bind the corresponding service through the Map, in dealing with logic, it is possible to obtain the corresponding service entity classes through the corresponding instruction through key-value way to reduce traversal

6, it's the file: Because it may be possible to file directory when the user input file, so making this judgment is more complex, needs to be handled differently depending on the input, in addition, we have to consider the need for additional recursive, which add up to several layers of logical difficulty is increased, where the need for the user to enter the name of the file is parsed in order to operate file

Fourth, the design and implementation process

1, a flowchart of:

2、流程图解析：当运行程序时，用户输入相应的指令（例：-c [fileName]），从而调用main函数，main首先会判断是否需要调用图形界面和是否需要进行递归，方便后续进行不同的操作。然后会根据文件名判断当前文件是否可读；若可读，则调用read函数，传递文件和指令进入这个函数，然后根据指令调用相对于的service对文件进行读操作，从而来对其进行相应的WordCount；若不可读，则会通过正则表达式判断文件名是否含有通配符，若符合条件，则获取其所在的目录，若可递归，则进行递归操作，若不可递归，则对该目录下的所有文件进行WordCount；

3、类的目录结构