How to implement ordering applet in SpringBoot

1. Function introduction

This ordering system is mainly developed based on the SpringBoot framework and small programs. It is mainly designed to provide more convenient and efficient services for contemporary people's lives, and also to provide more efficient services for marketers. A good system manages information such as users, products, orders, etc.

The main functional modules implemented by the system are as follows:

Front desk:

1) Registration and login

2) Personal center

① Modify personal information

② Modify shipping address

③ Points

3) Product browsing

4) Product search

5 ) Shopping cart

6) Order payment backend:

1) Register and log in

2) Personal center

① Modify personal information

② Change password

3) User management

① Customer information management

② Administrator information management

4) Product management

①Product classification management

②Product information management

③Inventory and sales

5) Order management

The front desk provides user registration login and personal center , browse products, find products, add products to shopping cart, order submission and payment and other functions. The backend provides functions such as management registration and login, password modification, personal information modification, user information management, administrator information management, product information management, product distribution management, inventory and sales statistics, order management, etc.

2. Introduction to development language

The SpringBoot Vue WeChat applet is used for development, and the database uses Mysql.

3. System interface introduction

##Four, core code demonstration

/**
 * 登录相关
 */
@RequestMapping("users")
@RestController
public class UserController{
	@Autowired
	private UserService userService;
	@Autowired
	private TokenService tokenService;
	/**
	 * 登录
	 */
	@IgnoreAuth
	@PostMapping(value = "/login")
	public R login(String username, String password, String captcha, HttpServletRequest request) {
		UserEntity user = userService.selectOne(new EntityWrapper<UserEntity>().eq("username", username));
		if(user==null || !user.getPassword().equals(password)) {
			return R.error("账号或密码不正确");
		}
		String token = tokenService.generateToken(user.getId(),username, "users", user.getRole());
		return R.ok().put("token", token);
	}
	/**
	 * 注册
	 */
	@IgnoreAuth
	@PostMapping(value = "/register")
	public R register(@RequestBody UserEntity user){
//    	ValidatorUtils.validateEntity(user);
    	if(userService.selectOne(new EntityWrapper<UserEntity>().eq("username", user.getUsername())) !=null) {
    		return R.error("用户已存在");
    	}
        userService.insert(user);
        return R.ok();
    }
	/**
	 * 退出
	 */
	@GetMapping(value = "logout")
	public R logout(HttpServletRequest request) {
		request.getSession().invalidate();
		return R.ok("退出成功");
	}
	/**
     * 密码重置
     */
    @IgnoreAuth
	@RequestMapping(value = "/resetPass")
    public R resetPass(String username, HttpServletRequest request){
    	UserEntity user = userService.selectOne(new EntityWrapper<UserEntity>().eq("username", username));
    	if(user==null) {
    		return R.error("账号不存在");
    	}
    	user.setPassword("123456");
        userService.update(user,null);
        return R.ok("密码已重置为：123456");
    }
	/**
     * 列表
     */
    @RequestMapping("/page")
    public R page(@RequestParam Map<String, Object> params,UserEntity user){
        EntityWrapper<UserEntity> ew = new EntityWrapper<UserEntity>();
    	PageUtils page = userService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.allLike(ew, user), params), params));
        return R.ok().put("data", page);
    }
	/**
     * 列表
     */
    @RequestMapping("/list")
    public R list( UserEntity user){
       	EntityWrapper<UserEntity> ew = new EntityWrapper<UserEntity>();
      	ew.allEq(MPUtil.allEQMapPre( user, "user"));
        return R.ok().put("data", userService.selectListView(ew));
    }
    /**
     * 信息
     */
    @RequestMapping("/info/{id}")
    public R info(@PathVariable("id") String id){
        UserEntity user = userService.selectById(id);
        return R.ok().put("data", user);
    }
    /**
     * 获取用户的session用户信息
     */
    @RequestMapping("/session")
    public R getCurrUser(HttpServletRequest request){
    	Long id = (Long)request.getSession().getAttribute("userId");
        UserEntity user = userService.selectById(id);
        return R.ok().put("data", user);
    }
    /**
     * 保存
     */
    @PostMapping("/save")
    public R save(@RequestBody UserEntity user){
//    	ValidatorUtils.validateEntity(user);
    	if(userService.selectOne(new EntityWrapper<UserEntity>().eq("username", user.getUsername())) !=null) {
    		return R.error("用户已存在");
    	}
        userService.insert(user);
        return R.ok();
    }
    /**
     * 修改
     */
    @RequestMapping("/update")
    public R update(@RequestBody UserEntity user){
//        ValidatorUtils.validateEntity(user);
    	UserEntity u = userService.selectOne(new EntityWrapper<UserEntity>().eq("username", user.getUsername()));
    	if(u!=null && u.getId()!=user.getId() && u.getUsername().equals(user.getUsername())) {
    		return R.error("用户名已存在。");
    	}
        userService.updateById(user);//全部更新
        return R.ok();
    }
    /**
     * 删除
     */
    @RequestMapping("/delete")
    public R delete(@RequestBody Long[] ids){
        userService.deleteBatchIds(Arrays.asList(ids));
        return R.ok();
    }
}

/**
 * 订单
 * 后端接口
 * @author 小孟v：jishulearn
 * @email
 * @date 2022-06-26 09:41:24
 */
@RestController
@RequestMapping("/orders")
public class OrdersController {
    @Autowired
    private OrdersService ordersService;
    @Autowired
    private CaipinxinxiService caipinxinxiService;
    /**
     * 后端列表
     */
    @RequestMapping("/page")
    public R page(@RequestParam Map<String, Object> params,OrdersEntity orders,
		HttpServletRequest request){
    	if(!request.getSession().getAttribute("role").toString().equals("管理员")) {
    		orders.setUserid((Long)request.getSession().getAttribute("userId"));
    	}
        EntityWrapper<OrdersEntity> ew = new EntityWrapper<OrdersEntity>();
		PageUtils page = ordersService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, orders), params), params));
        return R.ok().put("data", page);
    }
    /**
     * 前端列表
     */
    @RequestMapping("/list")
    public R list(@RequestParam Map<String, Object> params,OrdersEntity orders, HttpServletRequest request){
        EntityWrapper<OrdersEntity> ew = new EntityWrapper<OrdersEntity>();
		PageUtils page = ordersService.queryPage(params, MPUtil.sort(MPUtil.between(MPUtil.likeOrEq(ew, orders), params), params));
        return R.ok().put("data", page);
    }
	/**
     * 列表
     */
    @RequestMapping("/lists")
    public R list( OrdersEntity orders){
       	EntityWrapper<OrdersEntity> ew = new EntityWrapper<OrdersEntity>();
      	ew.allEq(MPUtil.allEQMapPre( orders, "orders"));
        return R.ok().put("data", ordersService.selectListView(ew));
    }
	 /**
     * 查询
     */
    @RequestMapping("/query")
    public R query(OrdersEntity orders){
        EntityWrapper< OrdersEntity> ew = new EntityWrapper< OrdersEntity>();
 		ew.allEq(MPUtil.allEQMapPre( orders, "orders"));
		OrdersView ordersView =  ordersService.selectView(ew);
		return R.ok("查询订单成功").put("data", ordersView);
    }
    /**
     * 后端详情
     */
    @RequestMapping("/info/{id}")
    public R info(@PathVariable("id") Long id){
        OrdersEntity orders = ordersService.selectById(id);
        return R.ok().put("data", orders);
    }
    /**
     * 前端详情
     */
    @RequestMapping("/detail/{id}")
    public R detail(@PathVariable("id") Long id){
        OrdersEntity orders = ordersService.selectById(id);
        return R.ok().put("data", orders);
    }
    /**
     * 后端保存
     */
    @RequestMapping("/save")
    public R save(@RequestBody OrdersEntity orders, HttpServletRequest request){
    	orders.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());
    	//ValidatorUtils.validateEntity(orders);
    	orders.setUserid((Long)request.getSession().getAttribute("userId"));
        ordersService.insert(orders);
        return R.ok();
    }
    /**
     * 前端保存
     */
    @RequestMapping("/add")
    public R add(@RequestBody OrdersEntity orders, HttpServletRequest request){
    	orders.setId(new Date().getTime()+new Double(Math.floor(Math.random()*1000)).longValue());
    	//ValidatorUtils.validateEntity(orders);
        CaipinxinxiEntity caipinxinxiEntity = caipinxinxiService.selectById(orders.getGoodid());
        if(caipinxinxiEntity.getStore()<orders.getBuynumber()){
            return R.error("库存不足");
        }
        caipinxinxiEntity.setStore(caipinxinxiEntity.getStore()-orders.getBuynumber());
        caipinxinxiEntity.setSell(caipinxinxiEntity.getSell()+orders.getBuynumber());
        caipinxinxiService.updateById(caipinxinxiEntity);
        ordersService.insert(orders);
        return R.ok();
    }
    /**
     * 修改
     */
    @RequestMapping("/update")
    public R update(@RequestBody OrdersEntity orders, HttpServletRequest request){
        //ValidatorUtils.validateEntity(orders);
        ordersService.updateById(orders);//全部更新
        return R.ok();
    }

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