Design and implementation of automobile repair and maintenance management system based on java

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3.3Performance demand analysis

Performance ofthissystemfromeach< /span>Analysis;

1. Comprehensive performance analysis:possibleconfirmation designbeginning daigowa calculation,useexpressivekaliteral Format details person =13>targetperfectionsexuality;

2. Whether the system operationcan be analyzed smoothly: each function has the relationship of writing data andThe code corresponding to is analyzed through requirements analysis and feasibility analysis Display the physical data of the system, ensure the smoothness of its system;

3. Analysis of the system’s interface design: The way the software in the system is processed and analyzed isthroughdifferent codes running, canmake thesystem convenient Operation;

4. Analyze the security of the system:Make each role has different corresponding information. Be sure to use your own name when logging in to the system. If you log in with your account and password, if your account and password are incorrect, your login will fail. After successfully logging in you can operate on your owndata but not < /span> system. the security of the ensuresThis , information to view’s accountOthers

4 System design

4.1 Functional structure

In order to better understand the overall idea of this system, the system is represented in the form of a structural diagram, and the basic functions of the vehicle maintenance system are designed and implemented. The structural diagram is as follows:

4.2 Database design

4.2.1 Database E/R diagram

An ER diagram is a graph composed of specific interrelationships. The E/R diagram can clearly illustrate the interrelationships between entities involved in the system. In the system, for some of the most important or several key entities, as shown in the figure:

(1) The user registration E/R diagram is as follows:

4.2.2 Database table

The design of the database table is as follows:

Each accessory has a unique id as the primary key of the table.The accessory classification table is shown in Table 4.1

Table 4.1 Classification of accessories

Field Name	type	length	Field description	primary key	default value
id	bigint		primary key	primary key
addtime	timestamp		creation time		CURRENT_TIMESTAMP
peijianfenlei	varchar	200	Accessories classification

Each fault information has a corresponding description, and the fault information table is shown in Table 4.2.

Table 4.2 Fault information

Field Name	type	length	Field description	primary key	default value
id	bigint		primary key	primary key
addtime	timestamp		creation time		CURRENT_TIMESTAMP
guzhangmingcheng	varchar	200	Fault name
cheliangmingcheng	varchar	200	vehicle name
chepaihaoma	varchar	200	License plate number
cheliangyanse	varchar	200	vehicle color
yonghuzhanghao	varchar	200	user account
yonghuxingming	varchar	200	username
guzhangmiaoshu	longtext	4294967295	Fault description
jiejueshijian	date		Resolution time
jiejuefangfa	longtext	4294967295	Solution
yuangongzhanghao	varchar	200	Employee account
yuangongxingming	varchar	200	employee's name

The announcement has a unique id as the subject's primary key, and related instructions. The announcement information table is shown in Table 4.3.

Table 4.3 Announcement information

Field Name	type	length	Field description	primary key	default value
id	bigint		primary key	primary key
addtime	timestamp		creation time		CURRENT_TIMESTAMP
gonggaobiaoti	varchar	200	Announcement title
fengmian	varchar	200	cover
faburen	varchar	200	publisher
gonggaoshijian	date		Announcement time
gonggaoneirong	longtext	4294967295	Announcement content

5 system function implementation

After logging in to the system, managers, users and administrators must select roles as required on the login page before entering the operating system, enter their account password and click Login to complete the registration steps, as shown in Figure 5.1.

5.1 Administrator function module

After logging in to the system, the administrator can see the home page, personal management center, user information, personnel management, car information, accident information, inventory information, accessories category management, accessories information, user information, file information, statistical information and other operations , and can complete related operations for each function one by one, as shown in Figure 5.2.

6.2 System testing method

6.2.1 User registration function test

Determine whether the user has successfully registered. As shown in Table 6.1.

Table 6.1 User registration function test cases

serial number	enter	expected outcome	actual results	Test Results
1	Username: Null Password: Null	The registered user name can only be in Chinese	The registered name is only in Chinese	pass
2	Username 234553 Password: Null	Prompt password length must be 6-12 characters	Prompt password length must be 6-12 characters	pass
3	Username: tzl123 Password: 1ewe56	registration success	registration success	pass
4	Username: eew3 Password: 121189	Prompt username already exists	Registered member already exists	pass

6.2.2 User login function test

Determine whether the user's login is successful. As shown in Table 6.2.

Table 6.2 User login function test cases

serial number	enter	expected outcome	actual results	Test Results
1	Username: Null Password: Null	Prompt username or password cannot be empty	Prompt username or password cannot be empty	pass
2	Username 154812 Password: Null	Prompt username or password cannot be empty	Prompt username or password cannot be empty	pass
3	Username: zxl123 Password: 12345	Prompt that the username or password is inconsistent	Prompt that the username or password is inconsistent	pass
4	Username: 2001545 Password: 12345678	Prompt that the user does not exist	Prompt that the user does not exist	pass

6.2.3 Personal information modification function test

Whether the user can successfully submit a repair report and whether there is a return prompt when the required information is empty. As shown in Table 6.3.

Table 6.3 Personal information modification function test cases

serial number	enter	expected outcome	actual results	Test Results
1	Username: ddd	Successfully modified	Successfully modified	pass
2	Mobile number: 12346951111	Successfully modified	Successfully modified	pass
3	Address: ddd	Successfully modified	Successfully modified	pass
4	Password: ddd	Successfully modified	Successfully modified	pass