Java工具类03Excel读取为Map

基于poi的二次封装，将Excel读取为List<Map>

直接上代码：

//参考
https://www.jianshu.com/p/2ba3c0bd3eb6

 1 import java.io.File;
 2 import java.io.FileInputStream;
 3 import java.io.IOException;
 4 import java.io.InputStream;
 5 import java.util.ArrayList;
 6 import java.util.HashMap;
 7 import java.util.LinkedHashMap;
 8 import java.util.List;
 9 import java.util.Map;
10 
11 import org.apache.poi.ss.usermodel.Cell;
12 import org.apache.poi.ss.usermodel.CellType;
13 import org.apache.poi.ss.usermodel.Row;
14 import org.apache.poi.ss.usermodel.Sheet;
15 import org.apache.poi.ss.usermodel.Workbook;
16 import org.apache.poi.ss.usermodel.WorkbookFactory;
17
19 /**
20  * ExcelToMapUtils 非反射读取 map
21  */
22 public class ExcelToMapUtils {
23 
24     public static List<Map<String, Object>> importExcel(String filepath, int index) {
25         List<Map<String, Object>> mapList = new ArrayList<Map<String, Object>>();
26         Workbook workbook = null;
27         try {
28             workbook = WorkbookFactory.create(new FileInputStream(filepath));
29             Sheet sheet = workbook.getSheetAt(index);//可根据index，sheetName等
30             Row row = sheet.getRow(0); //表头行
31             List<String> keys = new ArrayList<String>();
32             for (int i = 0; i < row.getLastCellNum(); i++) {
33                 Cell cell = row.getCell(i); 
34                 keys.add(String.valueOf(getValue(cell))); //取表头行的每一个元素，组装keys集合
35             }
36             //从第二行开始循环行
37             for (int i = 1; i <= sheet.getLastRowNum(); i++) {
38                 Row currentRow = sheet.getRow(i);
39                 Map<String, Object> map = new LinkedHashMap<String, Object>();
40                 //循环cell列
41                 for (int j = 0; j < currentRow.getLastCellNum(); j++) {
42                     map.put(keys.get(j), getValue(currentRow.getCell(j))); //组装Map
43                 }
44                 mapList.add(map); //组装List<Map>
45             }
46         } catch (Exception e) {
47             e.printStackTrace();
48             throw new RuntimeException("excel解析出错");
49         } finally {
50             try {
51                 if (workbook != null) {
52                     workbook.close();
53                 }
54             } catch (IOException e) {
55                 e.printStackTrace();
56             }
57         }
58         return mapList;
59     }
60 
61     private static Object getValue(Cell cell) {
62         if(cell==null) {
63             return "";
64         }
65         if (cell.getCellTypeEnum() == CellType.BOOLEAN) {
66             return cell.getBooleanCellValue();
67         } else if (cell.getCellTypeEnum() == CellType.NUMERIC) {
68             return cell.getNumericCellValue();
69         } else {
70             return String.valueOf(cell.getStringCellValue());
71         }
72     }73 }