package com.project.demo.service.base;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.project.demo.constant.FindConfig;
import com.project.demo.dao.base.BaseMapper;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.ParameterizedType;
import java.net.URLDecoder;
import java.security.MessageDigest;
import java.util.*;
/**
*/
@Slf4j
public class BaseService<E>{
@Autowired
private BaseMapper<E> baseMapper;
Class<E> eClass = (Class<E>)((ParameterizedType)getClass().getGenericSuperclass()).getActualTypeArguments()[0];
private final String table = humpToLine(eClass.getSimpleName());
public List selectBaseList(String select) {
List<Map<String,Object>> mapList = baseMapper.selectBaseList(select);
List<E> list = new ArrayList<>();
for (Map<String,Object> map:mapList) {
list.add(JSON.parseObject(JSON.toJSONString(map),eClass));
}
return list;
}
public int selectBaseCount(String sql) {
return baseMapper.selectBaseCount(sql);
}
public int deleteBaseSql(String sql) {
return baseMapper.deleteBaseSql(sql);
}
public int updateBaseSql(String sql) {
return baseMapper.updateBaseSql(sql);
}
public void insert(Map<String,Object> body){
E entity = JSON.parseObject(JSON.toJSONString(body),eClass);
baseMapper.insert(entity);
log.info("[{}] - 插入操作:{}",entity);
}
@Transactional
public void update(Map<String,String> query,Map<String,String> config,Map<String,Object> body){
QueryWrapper wrapper = new QueryWrapper<E>();
toWhereWrapper(query,"0".equals(config.get(FindConfig.LIKE)),wrapper);
E entity = JSON.parseObject(JSON.toJSONString(body),eClass);
baseMapper.update(entity,wrapper);
log.info("[{}] - 更新操作:{}",entity);
}
public Map<String,Object> selectToPage(Map<String,String> query,Map<String,String> config){
Map<String,Object> map = new HashMap<>();
List list = baseMapper.selectBaseList(select(query, config));
map.put("list",list);
map.put("count",baseMapper.selectBaseCount(count(query,config)));
return map;
}
public Map<String,Object> selectToList(Map<String,String> query,Map<String,String> config){
Map<String,Object> map = new HashMap<>();
List<Map<String,Object>> resultList = baseMapper.selectBaseList(selectGroupCount(query, config));
List list = new ArrayList();
for (Map<String,Object> resultMap:resultList) {
List subList = new ArrayList();
for(String key:resultMap.keySet()){//keySet获取map集合key的集合 然后在遍历key即可
subList.add(resultMap.get(key));
}
list.add(subList);
}
map.put("list",list);
return map;
}
public Integer selectSqlToInteger(String sql){
Integer value = baseMapper.selectBaseCount(sql);
return value;
}
public Map<String,Object> selectBarGroup(Map<String,String> query,Map<String,String> config){
Map<String,Object> map = new HashMap<>();
List<Map<String,Object>> resultList = baseMapper.selectBaseList(barGroup(query, config));
List list = new ArrayList();
for (Map<String,Object> resultMap:resultList) {
List subList = new ArrayList();
for(String key:resultMap.keySet()){//keySet获取map集合key的集合 然后在遍历key即可
subList.add(resultMap.get(key));
}
list.add(subList);
}
map.put("list",list);
return map;
}
// public void barGroup(Map<String,String> query,Map<String,String> config,QueryWrapper wrapper){
// if (config.get(FindConfig.GROUP_BY) != null && !"".equals(config.get(FindConfig.GROUP_BY))){
// wrapper.select(config.get(FindConfig.GROUP_BY));
// if (config.get(FindConfig.FIELD) != null && !"".equals(config.get(FindConfig.FIELD))){
// String[] fieldList = config.get(FindConfig.FIELD).split(",");
// for (int i=0;i<fieldList.length;i++)
// wrapper.select("SUM("+fieldList[i]+")");
// }
// toWhereSql(query, "0".equals(config.get(FindConfig.LIKE)),wrapper);
// wrapper.groupBy(config.get(FindConfig.GROUP_BY));
// }else {
// wrapper.select("SUM("+config.get(FindConfig.GROUP_BY)+")");
// toWhereSql(query, "0".equals(config.get(FindConfig.LIKE)),wrapper);
// }
// log.info("[{}] - 查询操作,sql: {}",wrapper.getSqlSelect());
// }
public String barGroup(Map<String,String> query,Map<String,String> config){
StringBuffer sql = new StringBuffer(" SELECT ");
if (config.get(FindConfig.GROUP_BY) != null && !"".equals(config.get(FindConfig.GROUP_BY))){
sql.append(config.get(FindConfig.GROUP_BY));
if (config.get(FindConfig.FIELD) != null && !"".equals(config.get(FindConfig.FIELD))){
String[] fieldList = config.get(FindConfig.FIELD).split(",");
for (int i=0;i<fieldList.length;i++)
sql.append(" ,SUM(").append(fieldList[i]).append(")");
}
sql.append(" FROM ").append("`").append(table).append("`");
sql.append(toWhereSql(query, "0".equals(config.get(FindConfig.LIKE))));
sql.append(" ").append("GROUP BY ").append(config.get(FindConfig.GROUP_BY));
}else {
sql.append(" SUM(").append(config.get(FindConfig.GROUP_BY)).append(") FROM ").append("`").append(table).append("`");
sql.append(toWhereSql(query, "0".equals(config.get(FindConfig.LIKE))));
}
log.info("[{}] - 查询操作,sql: {}",table,sql);
return sql.toString();
}
// public void selectGroupCount(Map<String,String> query,Map<String,String> config,QueryWrapper wrapper){
// wrapper.select("count(*) AS count_value",config.get(FindConfig.GROUP_BY));
// toWhereSql(query, "0".equals(config.get(FindConfig.LIKE)),wrapper);
// if (config.get(FindConfig.GROUP_BY) != null && !"".equals(config.get(FindConfig.GROUP_BY))){
// wrapper.groupBy(config.get(FindConfig.GROUP_BY));
// }
// log.info("[{}] - 查询操作,sql: {}",wrapper.getSqlSelect());
// }
public String selectGroupCount(Map<String,String> query,Map<String,String> config){
StringBuffer sql = new StringBuffer("select COUNT(*) AS count_value, ");
sql.append(config.get(FindConfig.GROUP_BY)).append(" ");
sql.append("from ").append("`").append(table).append("` ");
sql.append(toWhereSql(query, "0".equals(config.get(FindConfig.LIKE))));
if (config.get(FindConfig.GROUP_BY) != null && !"".equals(config.get(FindConfig.GROUP_BY))){
sql.append("group by ").append(config.get(FindConfig.GROUP_BY)).append(" ");
}
log.info("[{}] - 查询操作,sql: {}",table,sql);
return sql.toString();
}
// public void select(Map<String,String> query,Map<String,String> config,QueryWrapper wrapper){
// wr
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温馨提示
前台需求: (1)用户模块:主要包括用户的注册和登陆、用户个人信息管理和个人资料修改等功能。 (2)商品模块:主要包括商品浏览、商品信息展示、商品搜索、商品收藏、商品购买、商品评论等功能。 (3)订单模块:主要包括添加订单、查看我的订单和删除订单等功能。 (4)订单模块:主要包括生成订单、我的订单、查看订单详细信息、在线支付等功能。 后台需求: (1)用户管理:主要包括用户列表、用户冻结等功能。 (2)商品管理:主要包括商品列表、商品类目管理、商品添加、商品信息管理等功能。 (3)订单管理:主要包括订单和支付管理等功能。 本文主要通过对系统的前台系统和后台管理系统进行了功能性需求分析,对系统的安全性和可扩展性进行了非功能性需求分析。在详细的需求分析的基础上,根据系统的功能设计确定了数据库结构,实现完整的代码编写。网上购物系统使用Java语言以及mysql数据库,完成了系统的主要模块的页面设计和功能实现。本文展示了首页页面的实现效果图,并通过代码和页面介绍了用户注册功能、商品搜索功能、加入订单和查看订单功能、和查看我的订单功能、在线付款功能以及商品展示功能的实现过程。
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