Talk about the project development life cycle

Project Development Life cycle:

One: Software project development model

Spiral Development Mode:

Spiral development model suitable for the situation of uncertain pre-project requirements: For each module, a development, analysis, design, coding, testing, on-line.

Benefits Keyi can effectively reduce the risk of software, I try to make the product as far as possible to meet customer needs:

Waterfall Mode:

Waterfall Mode: First of all the modules of the project requirements analysis, when the analysis is over, only to enter the next stage of the project, that is, design, coding, testing, on-line.

Benefits: Easier to carry out project control, and project quality controls! The quality of the project is very high

The design to the military is a waterfall. Development

Waterfall development is relatively high; the top helix is suitable for enterprise project management

A development: From start to finish, how to complete the process:

Two modes:

A: Yes. All the requirements are finished, functional model design (developed together)

2: A module, design and development of a module

If a big project: One billion: One year to finish: in the early stages of the project, the customer will not

All requirements: You can use the second type; But the main functions have been decided:

In the Setup Project management module:

Requirements Analysis:

We choose the spiral development model: The database should be developed first

Requirements Analysis:

Software Engineer: What is the path to understanding the requirements?

1: A requirement document, requirement Analysis: Documents are text

When there is a problem to communicate

2: Project manager will design to project team

Development experience: Technology

Project Manager: Control + Demand Analysis

The project manager communicates with the customer:

3: System prototype of the project: (Art designer)

4. Communication with qualified (customer)

The development of the time must first look backstage

If later change the industry: are all in the same industry I mean hotel development software, later also recruit hotel development software

Requirements Analysis:

Now the first item: restaurant net; system function

1: Table Module

2: Vegetable category Module (cuisine)

3: Vegetable information (dishes)

4; Order

Detailed analysis:

1: Backstage entry of the ashamed, to be in the background home display, and just not scheduled

2: Background entry of the type of dishes, on the front page display

3. Background passers-by food information, displayed at the front desk

4: After the order is generated by the foreground, the order details are displayed in the background

Database design:

1:5 Sheets:

1: Table Management (table)

2: Category Table of the dishes

3: Variety of dishes table

4: Order form (basic information of order)

5: Order schedule (mainly of vegetable varieties)

One dining table multiple dishes: order included order

Use integers best not booler type he represents gender

Now the database is built: Key 5 tables

First Step key table

CREATE table Dinnertable (--Table primary key

ID INT PRIMARY KEY auto_increment,----table name
TableName VARCHAR (20),
Tablestatus INT DEFAULT 0,---table status, 0, idle, 1 scheduled
OrderDate DATETIME
);

Second key table

CREATE TABLE FoodType (
ID INT PRIMARY Key auto_increment,--category primary key
TypeName VARCHAR (20)--category name
);

The third table for the third table of the list of menu items below is the child table

CREATE TABLE Food (
ID INT PRIMARY Key auto_increment,--primary key
Foodname VARCHAR (20),--Dish name
foodtype_id INT,----belongs to the cuisine, foreign key field
Price DOUBLE,-----prices
Mprice DOUBLE,---member Price
Remark VARCHAR (200),--Introduction
IMG VARCHAR (100)--image
);

Fourth table order form (order basic information)

CREATE TABLE Orders (
ID INT PRIMARY Key auto_increment,-----PRIMARY key
table_id INT,-------foreign key, table number
OrderDate datetime,--Date of order
Totalprice DOUBLE,---Order total amount required for all dishes

Orderstatus INT DEFAULT 0----order status; 0; no checkout, 1 checkout

　);

---5: Order schedule (mainly for vegetable varieties)
CREATE TABLE OrderDetail (
ID INT PRIMARY Key auto_increment,--primary key
OrderId INT,--foreign key; The primary key of the order table is introduced.
food_id INT,--foreign key; Reference is the primary key of the menu information table
Foodcount INT--the number of dishes

);

--the relationship between the added menu and the food category
ALTER TABLE Food ADD CONSTRAINT fk_food_foodtype_id);
--Order Details: Relationship to the order form
ALTER TABLE orderdetail ADD CONSTRAINT orderdetail_order_id FOREIGN KEY (Order ID) REFERENCES FoodType (ID);
--Order Details: The relationship with the food information
ALTER TABLE orderdetail ADD CONSTRAINT orderdetail_food_id FOREIGN KEY (food_id) REFERENCES food (ID);

---Order Details: The relationship with the food information is written in the database.

ALTER TABLE orderdetail ADD CONSTRAINT orderdetail_food_id FOREIGN KEY (food_id) REFERENCES food (ID);

--order form: relationship with Table table

ALTER TABLE orders ADD CONSTRAINT order_table_id FOREIGN KEY (table_id) REFERENCES dinnertable (ID); The above is the complete database design is now the system design; Finally, the coding design 2-1: The front and back office to operate the background points, left and right page to distinguish: If you want to directly access the background in the JSP link to the address

Talk about the project development life cycle