House rental system based on JAVA+SSM (high-quality graduation project)
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1. Project background introduction:
With the development of society and the improvement of people’s living standards, the demand for housing rental market has gradually increased. In order to meet people’s needs for convenient and fast house rental services, we decided to develop a house rental system based on JAVA + SSM with front-end and back-end separation. Our goal is to provide tourists, landlords and tenants with a convenient and efficient house rental platform, so that they can easily find properties that suit their needs and conduct rental operations. Through this system, visitors can browse the system homepage, search for property information, and view property details. Landlords can register as system users, publish their own property information, and manage orders, feedback information, collection information, etc. Tenants can also register as system users, search and book properties, and perform related order management, feedback information, collection management and other operations. During the research and development process, we will use JAVA as the back-end development language and use the SSM framework to achieve front-end and back-end separation. This architecture can make system development more modular and scalable, while also providing good security and stability. In order to ensure the functional perfection and user experience of the system, we will pay attention to the following design aspects: The system is designed with three roles: tourists, landlords, and tenants. The thinking at that time was relatively simple and there was no system administrator role set up. Anyway, it was enough for some small projects.
Visitor: Not registered and logged in yet. It has permissions to log in, register, search for properties, and query details.
Landlord: The user role is a landlord, a group who needs to rent houses. It has the capabilities of logging in, modifying personal information, modifying login password, searching for housing, querying details, collecting housing, viewing rental orders, canceling orders, publishing housing information, querying and managing housing information, and managing housing status. , processing of feedback information and other permissions.
Tenant: The user role is a tenant, a group that needs to rent a house. It has the authority to log in, modify personal information, modify login password, search for properties, query details, collect properties, create rental orders, cancel orders, delete orders, make payments, evaluate properties, and fill in feedback information.
2. Project technical introduction:
Front end
Name
Description
HTML, CSS
Used to design the content and style of web pages
JavaScript, JQuery
As Develop scripting language for Web pages, add various dynamic functions to web pages, and provide users with smoother and more beautiful browsing effects
Bootstrap
A simple, intuitive and powerful front-end development framework based on HTML, CSS and JavaScript, making Web development faster
Backend
Name
Description
Spring
Spring is a lightweight open source framework in the field of Java EE programming. The framework was first proposed and subsequently created by a programmer named Rod Johnson in 2002 to solve the complexity of enterprise-level programming development and implement agile development applications. frame. Spring is an open source container framework that integrates various types of tools and implements underlying class instantiation and life cycle management through the core Bean factory. In the entire framework, various types of functions are abstracted into beans, so that the management of various functions can be realized, including dynamic loading and aspect programming.
SpringMVC
Spring MVC is a follow-up product of SpringFrameWork and has been integrated into Spring Web Flow. The Spring framework provides full-featured MVC modules for building web applications.
MyBatis Plus
MyBatis-Plus (referred to as MP) is an enhancement tool for MyBatis. It only enhances and does not change based on MyBatis. Born to simplify development and improve efficiency.
Thymeleaf
Thymeleaf is a popular template engine developed in Java language and used to render templates for XML/XHTML/HTML5 content. engine. Similar to JSP, Velocity, FreeMaker, etc., it can also be easily integrated with web frameworks such as Spring MVC as a template engine for web applications.
Druid
Druid is an efficient data query system that mainly solves aggregation queries for large amounts of time-series-based data. Data can be ingested in real time and can be checked immediately after entering Druid. At the same time, the data is almost immutable. It is usually a factual event based on time series. After the fact occurs, it is entered into Druid and the external system can query the fact.
3. Introduction to system function modules:
4. Database design:
1: comment（comment）
Field name
Type
Default value
Column comment
id
int
NULL
Primary key ID
reply_id
int
NULL
Reply comment ID
room_id
int
NULL
Room ID
user_id
int
NULL
User ID
content
text
NULL
content
rate_count
int
NULL
Number of rating stars
create_time
datetime
NULL
Creation time
update_time
datetime
NULL
Modification time
2：favor（favor）
Field name
Type
Default value
Column comment
id
int
NULL
Primary key ID
user_id
int
NULL
User ID
room_id
int
NULL
House ID
create_time
datetime
NULL
Creation time
update_time
datetime
NULL
Modification time
3: message (message)
Field name
Type
Default value
Column comment
id
int
NULL
Primary key ID
room_id
int
NULL
House ID
order_id
int
NULL
send_id
int
NULL
Sender ID
accept_id
int
NULL
Acceptor ID
title
varchar
NULL
title
content
text
NULL
content
status
varchar
NULL
status
create_time
datetime
NULL
Creation time
update_time
datetime
NULL
Modification time
remark
varchar
NULL
Handling comments
4: room（room）
Field name
Type
Default value
Column comment
id
int
NULL
Primary key ID
owner_id
int
NULL
Landlord ID
title
varchar
NULL
Title
sub_title
varchar
NULL
Subtitle
month_price
double
NULL
Monthly rental price
location
varchar
NULL
location
info
text
NULL
Description
content
text
NULL
Content
img
text
NULL
Cover
images
text
NULL
Images
create_time
datetime
NULL
Creation time
update_time
datetime
NULL
Modification time
look_count
int
NULL
Views
5: room_detail (room_detail)
Field name
Type
Default value
Column comment
id
int
NULL
Primary key ID
room_id
int
NULL
Room ID
bedroom_count
int
NULL
Number of rooms
parlour_count
int
NULL
Number of living rooms
restroom_count
int
NULL
Number of bathrooms
bathroom_count
int
NULL
Number of bathrooms
capacity
varchar
NULL
size
garage
int
NULL
Number of garages
area
varchar
NULL
Community
address
varchar
NULL
Detailed address
type
varchar
NULL
type
build_year
varchar
NULL
Year of construction
status
varchar
NULL
Status
elevator
varchar
NULL
Is there an elevator
kitchen
varchar
NULL
Is there a kitchen
free_wifi
varchar
NULL
Free Wi-Fi
window
varchar
NULL
Window
metro
varchar
NULL
Is there a subway
rent_type
varchar
NULL
Leasing method
create_time
datetime
NULL
Creation time
update_time
datetime
NULL
Modification time
< /table>
6: room_order (room_order)
Field name
Type
Default value
Column comment
id
int
NULL
Primary key ID
room_id
int
NULL
House ID
user_id
int
NULL
User ID
owner_id
int
NULL
Landlord ID
order_num
varchar
NULL
Order number
pay_order
varchar
NULL
Order serial number
title
varchar
NULL
title
sub_title
varchar
NULL
Subtitle
pay_money
double
NULL
Price
content
text
NULL
Content
attachment
varchar
NULL
Attachment file
status
varchar
NULL
status
create_time
datetime
NULL
Creation time
pay_time
datetime
NULL
Payment time
update_time
datetime
NULL
Modification time
from_time
datetime
NULL
to_time
datetime
NULL
7: user(user)
Field name
Type
Default value
Column comment
id
int
NULL
Primary key ID
name
varchar
NULL
Name
password
varchar
NULL
Login password
sex
varchar
NULL
Gender
birth
varchar
NULL
Year and month of birth
idcard_num
varchar
NULL
ID card number
phone
varchar
NULL
Mobile phone number
email
varchar
NULL
Mailbox
location
varchar
NULL
Location
about
varchar
NULL
About
role
varchar
NULL
role
create_time
datetime
NULL
Creation time
update_time
datetime
NULL
Modification time
5. Role introduction:
The system is designed with three roles: tourists, landlords, and tenants. The thinking at that time was relatively simple and there was no system administrator role set up. Anyway, it was enough for some small projects.
Visitor: Not registered and logged in yet. It has permissions to log in, register, search for properties, and query details.
Landlord: The user role is a landlord, a group who needs to rent houses. It has the capabilities of logging in, modifying personal information, modifying login password, searching for housing, querying details, collecting housing, viewing rental orders, canceling orders, publishing housing information, querying and managing housing information, and managing housing status. , processing of feedback information and other permissions.
Tenant: The user role is a tenant, a group that needs to rent a house. It has the authority to log in, modify personal information, modify login password, search for properties, query details, collect properties, create rental orders, cancel orders, delete orders, make payments, evaluate properties, and fill in feedback information.
6. Function introduction:
Introduction to visitor functions
Function module
Function description
Login and registration aspects
Register as a system user
System homepage
Browse the system homepage, search for property information, and view property details (statistical views)
Introduction to landlord functions
Function module
Function description
Login and registration aspects
Fill in user information to register an account and use email and password to log in
Personal information
Modify personal information (name, location, email, Mobile phone number, ID number, personal description, etc.), change login password
Order management
View all orders, order details, cancel orders, delete Order
Publish the property
Fill in the basic information, fill in the detailed information, upload the cover image and house photos
Housing information management
Your own published housing information, edit housing, delete housing, pause publishing, start publishing, lease expiration
Feedback information
Query all feedback information, feedback information search, delete feedback, process feedback
Collection management
Query all collection information, search for collection information, cancel collection
System homepage
Browse the system homepage, search for property information, and view property details (Statistical views), bookmark listings
Introduction to tenant functions
Function module
Function description
Login and registration aspects
Fill in user information to register an account and use email and password to log in
Personal information
Modify personal information (name, location, email, Mobile phone number, ID number, personal description, etc.), change login password
Order management
View all orders, create orders, pay orders (false Payment), order details, cancel order, delete order, comment on listings
Feedback information
Feedback information, query all feedback information, feedback information search , query details and processing opinions
Collection management
Query all collection information, search for collection information, cancel collection
System homepage
Browse the system homepage, search for property information, view property details (statistical views), and bookmark properties
< /table>
7. Development tools and environment:
Development Tools
IntelliJ IDEA 2019.2.2 is mainly used for system development, system debugging, etc.
WebStorm 2019.2.1 mainly focuses on the development of front-end pages.
Navcat mainly performs database connection, database and table building, system debugging, etc.
Development environment
JDK 1.8
Maven 3.6
MySQL 5.7
Tomcat 8.5.78
8. Project structure:
This project uses the standard SSM directory structure, and the backend uses the MVC three-tier architecture. The specific project structure is as follows:
src: source code directory
src/main/java: source code main directory
src/main/java/xxx/component: storage address of common Java components, such as login interceptor [interceptor]
src/main/java/xxx/controller: java controller class storage address [control layer]
src/main/java/xxx/entity: Java entity class storage address [Model]
Note that the version of MySQL is 5.7, and other unknown problems may occur when using other versions.
9. Code examples:
/**
Generate verification code
*/
@GetMapping("/captchaImage")
public AjaxResult getCode(HttpServletResponse response) throws IOException
{<!-- -->
AjaxResult ajax = AjaxResult.success();
boolean captchaEnabled = configService.selectCaptchaEnabled();
ajax.put("captchaEnabled", captchaEnabled);
if (!captchaEnabled)
{<!-- -->
return ajax;
}
//Save verification code information
String uuid = IdUtils.simpleUUID();
String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;
String capStr = null, code = null;
BufferedImage image = null;
// Generate verification code
String captchaType = RuoYiConfig.getCaptchaType();
if ("math".equals(captchaType))
{<!-- -->
String capText = captchaProducerMath.createText();
capStr = capText.substring(0, capText.lastIndexOf("@"));
code = capText.substring(capText.lastIndexOf("@") + 1);
image = captchaProducerMath.createImage(capStr);
}
else if ("char".equals(captchaType))
{<!-- -->
capStr = code = captchaProducer.createText();
image = captchaProducer.createImage(capStr);
}
redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
// Convert stream information to write
FastByteArrayOutputStream os = new FastByteArrayOutputStream();
try
{<!-- -->
ImageIO.write(image, "jpg", os);
}
catch (IOException e)
{<!-- -->
return AjaxResult.error(e.getMessage());
}
ajax.put("uuid", uuid);
ajax.put("img", Base64.encode(os.toByteArray()));
return ajax;
}
/**
Universal local file upload
@param multipartFile file object
@return file access link URL
/
@PostMapping("/file")
public SimpleResponse uploadImg(@RequestParam("file") MultipartFile file) {
// File extension
String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".") + 1);
File savePathFile = new File(newTomcatFolder);
if (!savePathFile.exists()) {
// If the directory does not exist, create the directory
savePathFile.mkdir();
}
// Generate unique file name from UUID
String filename = UUID.randomUUID() + "." + suffix;
try {
// Save the file to the specified directory
file.transferTo(new File(newTomcatFolder + filename));
} catch (Exception e) {
e.printStackTrace();
return SimpleResponse.error("Exception when saving file");
}
// Return to access link
return SimpleResponse.success(newTomcatHost + filename);
}
/*
User login
*/
@PostMapping("/login")
public ReturnMsg manageLogin(@RequestBody Map<String, String> param) {<!-- -->
if (StrUtil.isEmpty(param.get("username")) || StrUtil.isEmpty(param.get("password"))) {<!-- -->
return ReturnMsg.error("Wrong username or password!");
}
ManageDTO manageDTO = new ManageDTO();
manageDTO.setUserName(param.get("username"));
manageDTO.setPassWord(param.get("password"));
QueryWrapper manageDTOQueryWrapper = new QueryWrapper<>(manageDTO);
manageDTOQueryWrapper.last("limit 1");
ManageDTO adminDTOS = manageService.getOne(manageDTOQueryWrapper);
if (adminDTOS == null) return ReturnMsg.error("Wrong username or password!");
Map<String, Object> map = new HashMap<>();
map.put("avatar", StrUtil.isNotBlank(adminDTOS.getPhotoImg()) ? adminDTOS.getPhotoImg() : "https://wpimg.wallstcn.com/f778738c-e4f8-4870-b634-56703b4acafe.gif");
map.put("introduction", adminDTOS.getName() + ",Hello!");
map.put("name", adminDTOS.getName());
map.put("roles", Arrays.asList("admin"));
map.put("type", adminDTOS.getStatus());
Map<String, String> returnMap = new HashMap<>();
String uuid = UUID.randomUUID().toString();
returnMap.put("token", uuid);
userInfoMap.put(uuid, JSON.toJSONString(map));
return ReturnMsg.ok(returnMap);
}
10. System screenshot:
11. Project summary:
The implementation of the overall functional module of the house rental system based on JAVA + SSM is mainly a test of what I have learned in the past few years in college. For the system, it is mainly through the current intelligent house rental system based on JAVA + SSM The implementation of the system has begun. After a semester of graduation project implementation, it is nearing completion. So far, when I recall the system development days throughout the semester, I have gained a lot. The main task of the graduation project is to establish an intelligent house rental system based on JAVA + SSM. It mainly uses JAVA and Mysql database development tools to perform corresponding operations on each functional module of the system. Finally, the system debugging results show that the system Basically can meet the functional requirements.
The development of the house rental system platform based on JAVA + SSM has been of great help to the improvement of my university studies. It enables me to learn the technical aspects of computer knowledge and the communication aspects of interacting with people. It makes me realize that no matter what we do, we need to persevere and work hard. Only by trying and persisting in doing it, we Only then can you succeed and gain the joy of success. If you don’t try and think with knowledge, you won’t even have a chance of success. Only by doing the actual operation will you get closer and closer to success. As the road moves forward, the future The road is beautiful. Regarding the implementation of the driving school management platform, this is the first time I have completed the design of a management system. During the design process of the project, I overcame various difficulties, and in the face of these difficulties, I actively faced them, found ways to solve the problems, and better mastered the theoretical knowledge and hands-on practical ability, starting from the development of the system. By the time the design was completed, I had completed a more comprehensive, complete, and secure platform management system, which also gave me a great sense of accomplishment and made me more confident in my future life.
12. Source code acquisition:
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