毕设选题推荐基于python的django框架餐厅点餐订餐服务评价系统

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一、开发介绍

1.1 开发环境

• 开发语言：Python2.1图片展示

• 数据库：MySQL

• 系统架构：B/S

• 后端：Django

• 前端：Vue+HTML+CSS+JavaScript+jQuery

• 工具：PyCharm

二、系统介绍

2.1图片展示

注册登录页面：

前台页面功能：前台页面功能：首页、菜品信息、菜品资讯、个人中心、后台管理

管理员后台页面：
功能：首页、个人中心、用户管理、菜品分类管理、菜品信息管理、餐桌管理、菜品订单管理、菜品评价管理、系统管理

用户后台页面：
功能：首页、注册、登录、个人中心、菜品订单管理、菜品评价管理、我的收藏管理

三、部分代码设计

3.1.Mybatis-Plus工具类-部分代码如下：

/**
 * Mybatis-Plus工具类
 */
public class MPUtil {
	public static final char UNDERLINE = '_';

	
	//mybatis plus allEQ 表达式转换
		public static Map allEQMapPre(Object bean,String pre) {
		   Map<String, Object> map =BeanUtil.beanToMap(bean);
		  return camelToUnderlineMap(map,pre);
	   }

		//mybatis plus allEQ 表达式转换
		public static Map allEQMap(Object bean) {
		   Map<String, Object> map =BeanUtil.beanToMap(bean);
		   return camelToUnderlineMap(map,"");
	   }

		public static Wrapper allLikePre(Wrapper wrapper,Object bean,String pre) {
			   Map<String, Object> map =BeanUtil.beanToMap(bean);
			   Map result = camelToUnderlineMap(map,pre);
			 
			return genLike(wrapper,result);
		}
	
		public static Wrapper allLike(Wrapper wrapper,Object bean) {
			  Map result = BeanUtil.beanToMap(bean, true, true);			 
			return genLike(wrapper,result);
		}
	
	
		public static Wrapper genLike( Wrapper wrapper,Map param) {
			Iterator<Map.Entry<String, Object>> it = param.entrySet().iterator();
			int i=0;
			while (it.hasNext()) {
				if(i>0) wrapper.and();
				Map.Entry<String, Object> entry = it.next();
				String key = entry.getKey();
				String value = (String) entry.getValue();
				wrapper.like(key, value);
				i++;
			}
			return wrapper;
		}
		
		public static Wrapper likeOrEq(Wrapper wrapper,Object bean) {
			  Map result = BeanUtil.beanToMap(bean, true, true);			 
			return genLikeOrEq(wrapper,result);
		}
		
		public static Wrapper genLikeOrEq( Wrapper wrapper,Map param) {
			Iterator<Map.Entry<String, Object>> it = param.entrySet().iterator();
			int i=0;
			while (it.hasNext()) {
				if(i>0) wrapper.and();
				Map.Entry<String, Object> entry = it.next();
				String key = entry.getKey();
				if(entry.getValue().toString().contains("%")) {
					wrapper.like(key, entry.getValue().toString().replace("%", ""));
				} else {
					wrapper.eq(key, entry.getValue());
				}
				i++;
			}
			return wrapper;
		}
		
		public static Wrapper allEq(Wrapper wrapper,Object bean) {
			  Map result = BeanUtil.beanToMap(bean, true, true);			 
			return genEq(wrapper,result);
		}
	
	
		public static Wrapper genEq( Wrapper wrapper,Map param) {
			Iterator<Map.Entry<String, Object>> it = param.entrySet().iterator();
			int i=0;
			while (it.hasNext()) {
				if(i>0) wrapper.and();
				Map.Entry<String, Object> entry = it.next();
				String key = entry.getKey();
				wrapper.eq(key, entry.getValue());
				i++;
			}
			return wrapper;
		}
	
	
		public static Wrapper between(Wrapper wrapper,Map<String, Object> params) {
			for(String key : params.keySet()) {
				String columnName = "";
				if(key.endsWith("_start")) {
					columnName = key.substring(0, key.indexOf("_start"));
					if(StringUtils.isNotBlank(params.get(key).toString())) {
						wrapper.ge(columnName, params.get(key));
					}
				}
				if(key.endsWith("_end")) {
					columnName = key.substring(0, key.indexOf("_end"));
					if(StringUtils.isNotBlank(params.get(key).toString())) {
						wrapper.le(columnName, params.get(key));
					}
				}
			}
			return wrapper;
		}
	
		public static Wrapper sort(Wrapper wrapper,Map<String, Object> params) {
			String order = "";
			if(params.get("order") != null && StringUtils.isNotBlank(params.get("order").toString())) {
				order = params.get("order").toString();
			}
			if(params.get("sort") != null && StringUtils.isNotBlank(params.get("sort").toString())) {
				if(order.equalsIgnoreCase("desc")) {
					wrapper.orderDesc(Arrays.asList(params.get("sort")));
				} else {
					wrapper.orderAsc(Arrays.asList(params.get("sort")));
				}
			}
			return wrapper;
		}
	
	
	/**
	 * 驼峰格式字符串转换为下划线格式字符串
	 * 
	 * @param param
	 * @return
	 */
	public static String camelToUnderline(String param) {
		if (param == null || "".equals(param.trim())) {
			return "";
		}
		int len = param.length();
		StringBuilder sb = new StringBuilder(len);
		for (int i = 0; i < len; i++) {
			char c = param.charAt(i);
			if (Character.isUpperCase(c)) {
				sb.append(UNDERLINE);
				sb.append(Character.toLowerCase(c));
			} else {
				sb.append(c);
			}
		}
		return sb.toString();
	}

	public static void main(String[] ages) {
		System.out.println(camelToUnderline("ABCddfANM"));
	}
	
	public static Map camelToUnderlineMap(Map param, String pre) {

		Map<String, Object> newMap = new HashMap<String, Object>();
		Iterator<Map.Entry<String, Object>> it = param.entrySet().iterator();
		while (it.hasNext()) {
			Map.Entry<String, Object> entry = it.next();
			String key = entry.getKey();
			String newKey = camelToUnderline(key);
			if (pre.endsWith(".")) {
				newMap.put(pre + newKey, entry.getValue());
			} else if (StringUtils.isEmpty(pre)) {
				newMap.put(newKey, entry.getValue());
			} else {

				newMap.put(pre + "." + newKey, entry.getValue());
			}
		}
		return newMap;
	}
}

3.2.校验工具类-部分代码如下：

/**
 * hibernate-validator校验工具类
 */
public class ValidatorUtils {
    private static Validator validator;

    static {
        validator = Validation.buildDefaultValidatorFactory().getValidator();
    }

    /**
     * 校验对象
     * @param object        待校验对象
     * @param groups        待校验的组
     * @throws EIException  校验不通过，则报EIException异常
     */
    public static void validateEntity(Object object, Class<?>... groups)
            throws EIException {
        Set<ConstraintViolation<Object>> constraintViolations = validator.validate(object, groups);
        if (!constraintViolations.isEmpty()) {
        	ConstraintViolation<Object> constraint = (ConstraintViolation<Object>)constraintViolations.iterator().next();
            throw new EIException(constraint.getMessage());
        }
    }
    
    
}

3.3.查询参数工具类-部分代码如下：

/**
 * 查询参数
 */
public class Query<T> extends LinkedHashMap<String, Object> {
	private static final long serialVersionUID = 1L;
    /**
     * mybatis-plus分页参数
     */
    private Page<T> page;
    /**
     * 当前页码
     */
    private int currPage = 1;
    /**
     * 每页条数
     */
    private int limit = 10;

    public Query(JQPageInfo pageInfo) {
    	//分页参数
        if(pageInfo.getPage()!= null){
            currPage = pageInfo.getPage();
        }
        if(pageInfo.getLimit()!= null){
            limit = pageInfo.getLimit();
        }

    
        //防止SQL注入（因为sidx、order是通过拼接SQL实现排序的，会有SQL注入风险）
        String sidx = SQLFilter.sqlInject(pageInfo.getSidx());
        String order = SQLFilter.sqlInject(pageInfo.getOrder());
        

        //mybatis-plus分页
        this.page = new Page<>(currPage, limit);

        //排序
        if(StringUtils.isNotBlank(sidx) && StringUtils.isNotBlank(order)){
            this.page.setOrderByField(sidx);
            this.page.setAsc("ASC".equalsIgnoreCase(order));
        }
    }
    
    
    public Query(Map<String, Object> params){
        this.putAll(params);

        //分页参数
        if(params.get("page") != null){
            currPage = Integer.parseInt((String)params.get("page"));
        }
        if(params.get("limit") != null){
            limit = Integer.parseInt((String)params.get("limit"));
        }

        this.put("offset", (currPage - 1) * limit);
        this.put("page", currPage);
        this.put("limit", limit);

        //防止SQL注入（因为sidx、order是通过拼接SQL实现排序的，会有SQL注入风险）
        String sidx = SQLFilter.sqlInject((String)params.get("sidx"));
        String order = SQLFilter.sqlInject((String)params.get("order"));
        this.put("sidx", sidx);
        this.put("order", order);

        //mybatis-plus分页
        this.page = new Page<>(currPage, limit);

        //排序
        if(StringUtils.isNotBlank(sidx) && StringUtils.isNotBlank(order)){
            this.page.setOrderByField(sidx);
            this.page.setAsc("ASC".equalsIgnoreCase(order));
        }

    }

    public Page<T> getPage() {
        return page;
    }

    public int getCurrPage() {
        return currPage;
    }

    public int getLimit() {
        return limit;
    }
}

总结

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