“This is the ninth day of my participation in the First Challenge 2022. For details: First Challenge 2022”
Research Background significance
China is a big agricultural country, agricultural economy in the whole national economy and social development has always had very important significance. Since the 1990s, electronic information, network communication, automatic control and other information technology has been widely used in the agricultural field. At present, China’s agricultural development has developed from traditional agriculture to modern agriculture. Agricultural informatization is the process of using information technology to promote sustainable and stable agriculture. It timely, effective, especially by mistake to farm information he sent to the hands of farmers, realize farm production, management, sales information, improve the efficiency of farm management. China has always attached importance to the development of agriculture, but the lack of agricultural modernization can not keep pace with the pace of modernization. At present, the construction of agricultural informatization in China is still in its infancy. In terms of policy, the Chinese government has built pilot areas of informationized farms in many places. At the technical level, all kinds of farm management systems are also developed and applied to all kinds of farms. Agricultural production management system with sensors is a widely used information technology. Through investigation and research on farms, analysis and establishment of database and farm information management system, processing sensor data, help managers to make correct decisions. Information collection and inquiry through traditional channels is very tedious and inefficient, and it is difficult to grasp the time. In this case, I decided to develop a set of Java based around side separate pages online intelligent farm management system including the login module, common user management, data analysis and display, farm plot plans to grow information management, management, production of early warning management, production management, and other modules, used to collect and publish the relevant information. Greatly improve efficiency and shorten time. So that we can more convenient experience and practice with the traditional way of management completely different.
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Main module design:
Language Technology:
Development tools: IDEA 2021.3, Navicat for mysql, Postman.
Development language: Java, JDk1.8, mysql5, Node.js 14.
Hardware environment: Windows 10 operating system, Google Browser, etc.
Main technologies: Springboot, Mybatis – Plus, Vue, Element UI, mysql, etc
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Function screenshots:
Enter the login address http://localhost:8001/#/login to access the login page and enter the account password for login authentication
User management:
Character Menu:
Menu list: Specific control down to the button level
Plot File:
Planting plan:
Means of production:
Notice and Announcement:
File information: view upload and download
Thesis Report:
Key source code:
User login:
/** * Login related **@author lyy
*/
@RestController
public class SysLoginController extends AbstractController {
@Autowired
private SysUserService sysUserService;
@Autowired
private SysUserTokenService sysUserTokenService;
@Autowired
private SysCaptchaService sysCaptchaService;
/** * Verification code */
@GetMapping("captcha.jpg")
public void captcha(HttpServletResponse response, String uuid)throws IOException {
response.setHeader("Cache-Control"."no-store, no-cache");
response.setContentType("image/jpeg");
// Get the image verification code
BufferedImage image = sysCaptchaService.getCaptcha(uuid);
ServletOutputStream out = response.getOutputStream();
ImageIO.write(image, "jpg", out);
IOUtils.closeQuietly(out);
}
/** * login */
@PostMapping("/sys/login")
public Map<String, Object> login(@RequestBody SysLoginForm form)throws IOException {
boolean captcha = sysCaptchaService.validate(form.getUuid(), form.getCaptcha());
// if(!captcha){
// return r.ror (" Verification code is not correct ");
/ /}
// User information
SysUserEntity user = sysUserService.queryByUserName(form.getUsername());
// The account does not exist or the password is incorrect
if(user == null| |! user.getPassword().equals(new Sha256Hash(form.getPassword(), user.getSalt()).toHex())) {
return R.error("Incorrect account number or password");
}
// The account is locked
if(user.getStatus() == 0) {return R.error("Account has been locked. Please contact your administrator.");
}
// Generate tokens and save them to the database
R r = sysUserTokenService.createToken(user.getUserId());
return r;
}
/** * exit */
@PostMapping("/sys/logout")
public R logout(a) {
sysUserTokenService.logout(getUserId());
returnR.ok(); }}Copy the codeService layer implementation:
/** * System user **@author admin
*/
@Service("sysUserService")
public class SysUserServiceImpl extends ServiceImpl<SysUserDao.SysUserEntity> implements SysUserService {
@Autowired
private SysUserRoleService sysUserRoleService;
@Autowired
private SysRoleService sysRoleService;
@Override
public PageUtils queryPage(Map<String, Object> params) {
String username = (String)params.get("username");
Long createUserId = (Long)params.get("createUserId");
IPage<SysUserEntity> page = this.page(
new Query<SysUserEntity>().getPage(params),
new QueryWrapper<SysUserEntity>()
.like(StringUtils.isNotBlank(username),"username", username) .eq(createUserId ! =null."create_user_id", createUserId)
);
return new PageUtils(page);
}
@Override
public List<String> queryAllPerms(Long userId) {
return baseMapper.queryAllPerms(userId);
}
@Override
public List<Long> queryAllMenuId(Long userId) {
return baseMapper.queryAllMenuId(userId);
}
@Override
public SysUserEntity queryByUserName(String username) {
return baseMapper.queryByUserName(username);
}
@Override
@Transactional
public void saveUser(SysUserEntity user) {
user.setCreateTime(new Date());
/ / sha256 encryption
String salt = RandomStringUtils.randomAlphanumeric(20);
user.setPassword(new Sha256Hash(user.getPassword(), salt).toHex());
user.setSalt(salt);
this.save(user);
// Check whether the role oversteps its authority
checkRole(user);
// Save the relationship between the user and the role
sysUserRoleService.saveOrUpdate(user.getUserId(), user.getRoleIdList());
}
@Override
@Transactional
public void update(SysUserEntity user) {
if(StringUtils.isBlank(user.getPassword())){
user.setPassword(null);
}else{
user.setPassword(new Sha256Hash(user.getPassword(), user.getSalt()).toHex());
}
this.updateById(user);
// Check whether the role oversteps its authority
checkRole(user);
// Save the relationship between the user and the role
sysUserRoleService.saveOrUpdate(user.getUserId(), user.getRoleIdList());
}
@Override
public void deleteBatch(Long[] userId) {
this.removeByIds(Arrays.asList(userId));
}
@Override
public boolean updatePassword(Long userId, String password, String newPassword) {
SysUserEntity userEntity = new SysUserEntity();
userEntity.setPassword(newPassword);
return this.update(userEntity,
new QueryWrapper<SysUserEntity>().eq("user_id", userId).eq("password", password));
}
/** * Check whether the role is unauthorized */
private void checkRole(SysUserEntity user){
if(user.getRoleIdList() == null || user.getRoleIdList().size() == 0) {return;
}
// If the user is not a super administrator, check whether the user role is created by itself
if(user.getCreateUserId() == Constant.SUPER_ADMIN){
return ;
}
// Query the role list created by the user
List<Long> roleIdList = sysRoleService.queryRoleIdList(user.getCreateUserId());
// Determine if you have exceeded your authority
if(! roleIdList.containsAll(user.getRoleIdList())){throw new RRException("Role selected by new user, not created by myself"); }}}Copy the codePermission control:
/** * Shiro configuration **@author admin
*/
@Configuration
public class ShiroConfig {
@Bean("securityManager")
public SecurityManager securityManager(OAuth2Realm oAuth2Realm) {
DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
securityManager.setRealm(oAuth2Realm);
securityManager.setRememberMeManager(null);
return securityManager;
}
@Bean("shiroFilter")
public ShiroFilterFactoryBean shiroFilter(SecurityManager securityManager) {
ShiroFilterFactoryBean shiroFilter = new ShiroFilterFactoryBean();
shiroFilter.setSecurityManager(securityManager);
/ / request filtering
Map<String, Filter> filters = new HashMap<>();
filters.put("oauth2".new OAuth2Filter());
shiroFilter.setFilters(filters);
Map<String, String> filterMap = new LinkedHashMap<>();
filterMap.put("/webjars/**"."anon");
filterMap.put("/druid/**"."anon");
filterMap.put("/app/**"."anon");
filterMap.put("/sys/login"."anon");
filterMap.put("/swagger/**"."anon");
filterMap.put("/v2/api-docs"."anon");
filterMap.put("/swagger-ui.html"."anon");
filterMap.put("/swagger-resources/**"."anon");
filterMap.put("/captcha.jpg"."anon");
filterMap.put("/aaa.txt"."anon");
filterMap.put("/virtuel/**"."anon");
filterMap.put("/ * *"."oauth2");
shiroFilter.setFilterChainDefinitionMap(filterMap);
return shiroFilter;
}
@Bean("lifecycleBeanPostProcessor")
public LifecycleBeanPostProcessor lifecycleBeanPostProcessor(a) {
return new LifecycleBeanPostProcessor();
}
@Bean
public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
AuthorizationAttributeSourceAdvisor advisor = new AuthorizationAttributeSourceAdvisor();
advisor.setSecurityManager(securityManager);
returnadvisor; }}Copy the codeGlobal configuration:
# Tomcat
server:
tomcat:
uri-encoding: UTF-8
max-threads: 1000
min-spare-threads: 30
port: 8080
connection-timeout: 5000ms
servlet:
context-path: /renren-fast
spring:
Environmental dev # | test | prod
profiles:
active: dev
# Jackson time formatting
jackson:
time-zone: GMT+8
date-format: yyyy-MM-dd HH:mm:ss
servlet:
multipart:
max-file-size: 100MB
max-request-size: 100MB
enabled: true
mvc:
throw-exception-if-no-handler-found: true
# resources:
# add-mappings: false
#mybatis
mybatis-plus:
mapper-locations: classpath*:/mapper/**/*.xml
# Entity scan, separate multiple packages with commas or semicolons
typeAliasesPackage: io.renren.modules.*.entity
global-config:
# Database configuration
db-config:
# primary key type AUTO:" database ID increment ", INPUT:" user INPUT ID", ID_WORKER:" global unique ID", UUID:" global unique ID UUID";
id-type: AUTO
logic-delete-value: - 1
logic-not-delete-value: 0
banner: false
# Native configuration
configuration:
map-underscore-to-camel-case: true
cache-enabled: false
call-setters-on-nulls: true
jdbc-type-for-null: 'null'
# file virtual path
virtuel:
# filePath: D:/training/
filePath: C:/Users/Administrator/Desktop/lyy/
Copy the codeConclusion:
Through the recent mastery and learning of Java object-oriented programming, front-end knowledge and Java framework, as well as the development of this period of education and teaching system, I have learned more about the importance of Java learning. Which is in the development of the system, I finished the multiple management platform of the experiment and the plot management functional testing, phase of the study of system development, from I know to be familiar with Java, and then to independent use relevant technology, I found it really have a lot of convenience, such as Java collection of abstraction and encapsulation and inheritance and polymorphism in the integral whole, Realizing the functions of code reuse and code expansion, improving the speed and efficiency of the overall software development. Such as the administrator to add users to Java. Lang. NullPointException, solution: View console print information, find did not fill in the relevant information, when you add to Java. Lang NullPointException, through debugging found power user information is empty items of data, in the front you must fill in the user in the complete information or database setting field can be null can be solve, The main purpose of my study of programming is to improve my key skills and techniques in programming solutions to practical problems.
Source code:
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