How do computer majors charge in winter vacation? Do a java graduation project

Research background and significance

China is a large agricultural country. Agricultural economy has always been of great significance in the whole national economic and social development. Since the 1990s, information technologies such as electronic information, network communication and automatic control have been widely used in the field of agriculture. 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 the sustainable and stable development of agriculture. It is timely and effective, especially sending farm information to farmers by mistake, realizing the informatization of farm production, management and sales, and improving the efficiency of farm management. China has always attached importance to the development of agriculture, but it lacks the pace of modernization synchronized with agricultural modernization. At present, China's agricultural information construction is still in its infancy. In terms of policy, the Chinese government has established pilot areas of information farms in many places. At the technical level, various farm management systems have also been developed and applied to various farms. Agricultural production management system with sensor is a widely used information technology. Through the investigation and research of the farm, analyze and establish the farm information management system and database, process the sensor data, and help the managers make correct decisions. Information collection and inquiry through traditional channels is very cumbersome, inefficient and difficult to grasp time. In this case, I decided to develop an online intelligent farm management system based on Java around side independent pages, including login module, ordinary user management, data analysis and display, farm plot planning and growth information management, production early warning management, production management and other modules, which are used to collect and publish relevant information. Greatly improve work efficiency and shorten working time. So that we can more conveniently experience and practice the management mode completely different from the traditional management mode. [contact for source code at the end of the article] How do computer majors charge during the winter vacation? Do a java project

Main module design:

Language Technology:

Development tools: IDEA 2021.3, navicat for mysql and postman.

Development language: java, jdk1 8,mysql5,node.js 14.

Main technologies: springboot, mybatis plus, vue, element UI, mysql, etc

Hardware environment: Windows 10 operating system, Google browser, etc.

Video presentation: How do computer majors charge during the winter vacation?

Function screenshot:

User input login address: http://localhost:8001/#/login Enter the login page Enter the account and password for login verification

Farm information management home page: the home page can be used for basic introduction, customized display, graphics and videos

Here, we use the echarts Tree Icon simulation.

User management:


Role menu:

Menu list: it can be controlled to the button level

Plot file:

Planting plan:

Means of production:

Early warning management:

Notice and announcement:

Documents: view, upload, download, etc

Paper report:


Key source code:

User login:

 * Login related
 * @author lyy
public class SysLoginController extends AbstractController {
	private SysUserService sysUserService;
	private SysUserTokenService sysUserTokenService;
	private SysCaptchaService sysCaptchaService;

	 * Verification Code
	public void captcha(HttpServletResponse response, String uuid)throws IOException {
		response.setHeader("Cache-Control", "no-store, no-cache");

		//Get picture verification code
		BufferedImage image = sysCaptchaService.getCaptcha(uuid);

		ServletOutputStream out = response.getOutputStream();
		ImageIO.write(image, "jpg", out);

	 * Sign in
	public Map<String, Object> login(@RequestBody SysLoginForm form)throws IOException {
		boolean captcha = sysCaptchaService.validate(form.getUuid(), form.getCaptcha());
//		if(!captcha){
//			return R.error("incorrect verification code");
//		}

		//User information
		SysUserEntity user = sysUserService.queryByUserName(form.getUsername());

		//Account does not exist, password error
		if(user == null || !user.getPassword().equals(new Sha256Hash(form.getPassword(), user.getSalt()).toHex())) {
			return R.error("Incorrect account or password");

		//account lockout
		if(user.getStatus() == 0){
			return R.error("Account locked,Please contact the administrator");

		//Generate a token and save it to the database
		R r = sysUserTokenService.createToken(user.getUserId());
		return r;

	 * sign out
	public R logout() {
		return R.ok();

service layer implementation:

 * System user
 * @author admin
public class SysUserServiceImpl extends ServiceImpl<SysUserDao, SysUserEntity> implements SysUserService {
	private SysUserRoleService sysUserRoleService;
	private SysRoleService sysRoleService;

	public PageUtils queryPage(Map<String, Object> params) {
		String username = (String)params.get("username");
		Long createUserId = (Long)params.get("createUserId");

		IPage<SysUserEntity> 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);

	public void saveUser(SysUserEntity user) {
		user.setCreateTime(new Date());
		//sha256 encryption
		String salt = RandomStringUtils.randomAlphanumeric(20);
		user.setPassword(new Sha256Hash(user.getPassword(), salt).toHex());
		//Check whether the role exceeds its authority
		//Save user role relationship
		sysUserRoleService.saveOrUpdate(user.getUserId(), user.getRoleIdList());

	public void update(SysUserEntity user) {
			user.setPassword(new Sha256Hash(user.getPassword(), user.getSalt()).toHex());
		//Check whether the role exceeds its authority
		//Save user role relationship
		sysUserRoleService.saveOrUpdate(user.getUserId(), user.getRoleIdList());

	public void deleteBatch(Long[] userId) {

	public boolean updatePassword(Long userId, String password, String newPassword) {
		SysUserEntity userEntity = new SysUserEntity();
		return this.update(userEntity,
				new QueryWrapper<SysUserEntity>().eq("user_id", userId).eq("password", password));

	public List<String> queryAllPerms(Long userId) {
		return baseMapper.queryAllPerms(userId);

	 * Check whether the role exceeds its authority
	private void checkRole(SysUserEntity user){
		if(user.getRoleIdList() == null || user.getRoleIdList().size() == 0){
		//If you are not a super administrator, you need to determine whether the user's role is created by yourself
		if(user.getCreateUserId() == Constant.SUPER_ADMIN){
			return ;
		//Query the role list created by the user
		List<Long> roleIdList = sysRoleService.queryRoleIdList(user.getCreateUserId());

		//Judge whether to exceed authority
			throw new RRException("The role selected by the new user is not created by himself");

Permission control:

 * Shiro to configure
 * @author admin 
public class ShiroConfig {

    public SecurityManager securityManager(OAuth2Realm oAuth2Realm) {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        return securityManager;

    public ShiroFilterFactoryBean shiroFilter(SecurityManager securityManager) {
        ShiroFilterFactoryBean shiroFilter = new ShiroFilterFactoryBean();

        //oauth filtering
        Map<String, Filter> filters = new HashMap<>();
        filters.put("oauth2", new OAuth2Filter());

        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");

        return shiroFilter;


    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor advisor = new AuthorizationAttributeSourceAdvisor();
        return advisor;
    public LifecycleBeanPostProcessor lifecycleBeanPostProcessor() {
        return new LifecycleBeanPostProcessor();

Global configuration:

# Tomcat
    uri-encoding: UTF-8
    max-threads: 1000
    min-spare-threads: 30
  port: 80
  connection-timeout: 5000ms
    context-path: /renren-fast

  # Environment dev|test|prod
    active: dev
  # jackson time formatting
    time-zone: GMT+8
    date-format: yyyy-MM-dd HH:mm:ss
      max-file-size: 100MB
      max-request-size: 100MB
      enabled: true
    throw-exception-if-no-handler-found: true

  mapper-locations: classpath*:/mapper/**/*.xml
  #For entity scanning, multiple package s are separated by commas or semicolons
  typeAliasesPackage: io.renren.modules.*.entity
    #Database related configuration
      #Primary key type AUTO: "self increment of database ID", INPUT: "user INPUT ID", ID_WORKER: "globally unique ID (unique ID of digital type)", UUID: "globally unique ID UUID";
      id-type: AUTO
      logic-delete-value: -1
      logic-not-delete-value: 0
    banner: false
  #Native configuration
    map-underscore-to-camel-case: true
    cache-enabled: false
    call-setters-on-nulls: true
    jdbc-type-for-null: 'null'

#File virtual path
  filePath: C:/Users/Administrator/Desktop/lyy/


After the recent mastery and learning of java object-oriented programming, front-end knowledge and java framework, as well as the development of this education and teaching system during this period, I have better understood the importance of java learning. In developing which system this system is, I have completed many experiments and functional tests of the land management platform. During the system development and learning stage, I learned that I am familiar with java, and then I can independently use relevant technologies. I found that it does have many conveniences, such as java integrates abstraction and encapsulation, inheritance and polymorphism, The functions of code reuse and code expansion are realized, and the speed and efficiency of the overall software development are improved. For example, when the administrator adds a user, it reports java Lang.nullpointexception. Solution: check the console print information, find that relevant information is not filled in when adding, and report to java Lang.nullpointexception, the data item with empty user information found through power-off debugging, the user's complete relevant information must be filled in when saving at the front end, or the database setting field can be empty. The main purpose of learning program design is to improve the key skills and technologies of program solutions to my actual problems.

Source code acquisition:

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Punch in article update 115 / 365 days

Keywords: Java

Added by drkylec on Sat, 15 Jan 2022 04:51:12 +0200