Excel——读取文件后——组装成待插入数据库数据——实体映射模式

package com.it.excel.excelLearn;

import java.io.IOException;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

public class App {
    public static void main(String[] args) throws IOException {
        String filePath = "C:\\Users\\gzh\\Desktop\\test.xlsx";
        List<ExcelSheetStructure> excelSheets = ExcelUtil.readExcel(filePath);
        // 获取所需sheet页
        ExcelSheetStructure sheetStructure = null;
        for (ExcelSheetStructure sheet : excelSheets) {
            if (sheet.getSheetName().equals("产品数据")) {
                sheetStructure = sheet;
                break;
            }
        }
        if (null == sheetStructure) {
            System.out.println("导入的Excel中没有【产品数据】sheet页");
            return;
        }
        // 把非表头数据转化为可插入数据
        Map<String, String> replaceHeaderMap = new HashMap<>();
        replaceHeaderMap.put("产品编号", "productNo");
        replaceHeaderMap.put("产品名称", "productName");

        List<Map<String, Object>> notHeaderData = sheetStructure.getSheetTableList();
        // 输出为替换前的数据
        System.out.println(notHeaderData);
        // 待插入数据定义
        List<Map<String, Object>> insertData = new LinkedList<>();
        for (Map<String, Object> notHeaderRowMap : notHeaderData) {
            Map<String,Object> insertMap = new HashMap<>();
            Set<Entry<String, Object>> entrySet = notHeaderRowMap.entrySet();
            for (Entry<String, Object> entry : entrySet) {
                Set<String> replaceHeaderMapKeySet = replaceHeaderMap.keySet();
                for (String key : replaceHeaderMapKeySet) {
                    if(entry.getKey().equals(key)){
                        insertMap.put(replaceHeaderMap.get(key), entry.getValue());
                        break;
                    }
                }
            }
            insertData.add(insertMap);
        }
        // 输出新待插入数据库中的数据
        System.out.println(insertData);
        // for循环，一条一条记录插入数据库
    }
}