poi讀取excell表格

 

最近項目須要實現一個將excell中的數據導入數據庫，在網上找到這篇文章，

 

一：導入maven依賴或相關jar包

poi-3.17.jar  下載地址：點擊打開連接
poi-ooxml-3.17.jar  下載地址：點擊打開連接
poi-ooxml-schemas-3.17.jar  下載地址：點擊打開連接

 

二：編寫ImportExcellUtils

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1. package com.debo.utils;  
2.   
3. import java.io.File;  
4. import java.io.FileInputStream;  
5. import java.io.FileNotFoundException;  
6. import java.io.IOException;  
7. import java.text.DecimalFormat;  
8. import java.text.SimpleDateFormat;  
9. import java.util.LinkedList;  
10. import java.util.List;  
11.   
12. import org.apache.poi.hssf.usermodel.HSSFCell;  
13. import org.apache.poi.hssf.usermodel.HSSFDateUtil;  
14. import org.apache.poi.hssf.usermodel.HSSFRow;  
15. import org.apache.poi.hssf.usermodel.HSSFSheet;  
16. import org.apache.poi.hssf.usermodel.HSSFWorkbook;  
17. import org.apache.poi.xssf.usermodel.XSSFCell;  
18. import org.apache.poi.xssf.usermodel.XSSFRow;  
19. import org.apache.poi.xssf.usermodel.XSSFSheet;  
20. import org.apache.poi.xssf.usermodel.XSSFWorkbook;  
21.   
22. public class ImportExcellUtils {  
23.     /**  
24.      * 對外提供讀取excel 的方法  
25.      * */  
26.     public static List<List<Object>> readExcel(File file) throws IOException {  
27.         String fileName = file.getName();  
28.         String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName  
29.                 .substring(fileName.lastIndexOf(".") + 1);  
30.         if ("xls".equals(extension)) {  
31.             return read2003Excel(file);  
32.         } else if ("xlsx".equals(extension)) {  
33.             return read2007Excel(file);  
34.         } else {  
35.             throw new IOException("不支持的文件類型");  
36.         }  
37.     }  
38.   
39.     /**  
40.      * 讀取 office 2003 excel  
41.      *   
42.      * @throws IOException  
43.      * @throws FileNotFoundException  
44.      */  
45.     private static List<List<Object>> read2003Excel(File file)  
46.             throws IOException {  
47.         List<List<Object>> list = new LinkedList<List<Object>>();  
48.         HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));  
49.         HSSFSheet sheet = hwb.getSheetAt(0);  
50.         Object value = null;  
51.         HSSFRow row = null;  
52.         HSSFCell cell = null;  
53.         int counter = 0;  
54.         for (int i = sheet.getFirstRowNum(); counter < sheet  
55.                 .getPhysicalNumberOfRows(); i++) {  
56.             row = sheet.getRow(i);  
57.             if (row == null) {  
58.                 continue;  
59.             } else {  
60.                 counter++;  
61.             }  
62.             List<Object> linked = new LinkedList<Object>();  
63.             for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {  
64.                 cell = row.getCell(j);  
65.                 if (cell == null) {  
66.                     continue;  
67.                 }  
68.                 DecimalFormat df = new DecimalFormat("0");// 格式化 number String  
69.                                                             // 字符  
70.                 SimpleDateFormat sdf = new SimpleDateFormat(  
71.                         "yyyy-MM-dd HH:mm:ss");// 格式化日期字符串  
72.                 DecimalFormat nf = new DecimalFormat("0.00");// 格式化數字  
73.                 switch (cell.getCellType()) {  
74.                 case XSSFCell.CELL_TYPE_STRING:  
75.                     System.out.println(i + "行" + j + " 列 is String type");  
76.                     value = cell.getStringCellValue();  
77.                     break;  
78.                 case XSSFCell.CELL_TYPE_NUMERIC:  
79.                     System.out.println(i + "行" + j  
80.                             + " 列 is Number type ; DateFormt:"  
81.                             + cell.getCellStyle().getDataFormatString());  
82.                     if ("@".equals(cell.getCellStyle().getDataFormatString())) {  
83.                         value = df.format(cell.getNumericCellValue());  
84.                     } else if ("General".equals(cell.getCellStyle()  
85.                             .getDataFormatString())) {  
86.                         value = nf.format(cell.getNumericCellValue());  
87.                     } else {  
88.                         value = sdf.format(HSSFDateUtil.getJavaDate(cell  
89.                                 .getNumericCellValue()));  
90.                     }  
91.                     break;  
92.                 case XSSFCell.CELL_TYPE_BOOLEAN:  
93.                     System.out.println(i + "行" + j + " 列 is Boolean type");  
94.                     value = cell.getBooleanCellValue();  
95.                     break;  
96.                 case XSSFCell.CELL_TYPE_BLANK:  
97.                     System.out.println(i + "行" + j + " 列 is Blank type");  
98.                     value = "";  
99.                     break;  
100.                 default:  
101.                     System.out.println(i + "行" + j + " 列 is default type");  
102.                     value = cell.toString();  
103.                 }  
104.                 if (value == null || "".equals(value)) {  
105.                     continue;  
106.                 }  
107.                 linked.add(value);  
108.             }  
109.             list.add(linked);  
110.         }  
111.         return list;  
112.     }  
113.   
114.     /**  
115.      * 讀取Office 2007 excel  
116.      * */  
117.     private static List<List<Object>> read2007Excel(File file)  
118.             throws IOException {  
119.         List<List<Object>> list = new LinkedList<List<Object>>();  
120.         // 構造 XSSFWorkbook 對象，strPath 傳入文件路徑  
121.         XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));  
122.         // 讀取第一章表格內容  
123.         XSSFSheet sheet = xwb.getSheetAt(0);  
124.         Object value = null;  
125.         XSSFRow row = null;  
126.         XSSFCell cell = null;  
127.         int counter = 0;  
128.         for (int i = sheet.getFirstRowNum(); counter < sheet  
129.                 .getPhysicalNumberOfRows(); i++) {  
130.             row = sheet.getRow(i);  
131.             if (row == null) {  
132.                 continue;  
133.             } else {  
134.                 counter++;  
135.             }  
136.             List<Object> linked = new LinkedList<Object>();  
137.             for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {  
138.                 cell = row.getCell(j);  
139.                 if (cell == null) {  
140.                     continue;  
141.                 }  
142.                 DecimalFormat df = new DecimalFormat("0");// 格式化 number String  
143.                                                             // 字符  
144.                 SimpleDateFormat sdf = new SimpleDateFormat(  
145.                         "yyyy-MM-dd HH:mm:ss");// 格式化日期字符串  
146.                 DecimalFormat nf = new DecimalFormat("0.00");// 格式化數字  
147.                 switch (cell.getCellType()) {  
148.                 case XSSFCell.CELL_TYPE_STRING:  
149.                     System.out.println(i + "行" + j + " 列 is String type");  
150.                     value = cell.getStringCellValue();  
151.                     break;  
152.                 case XSSFCell.CELL_TYPE_NUMERIC:  
153.                     System.out.println(i + "行" + j  
154.                             + " 列 is Number type ; DateFormt:"  
155.                             + cell.getCellStyle().getDataFormatString());  
156.                     if ("@".equals(cell.getCellStyle().getDataFormatString())) {  
157.                         value = df.format(cell.getNumericCellValue());  
158.                     } else if ("General".equals(cell.getCellStyle()  
159.                             .getDataFormatString())) {  
160.                         value = nf.format(cell.getNumericCellValue());  
161.                     } else {  
162.                         value = sdf.format(HSSFDateUtil.getJavaDate(cell  
163.                                 .getNumericCellValue()));  
164.                     }  
165.                     break;  
166.                 case XSSFCell.CELL_TYPE_BOOLEAN:  
167.                     System.out.println(i + "行" + j + " 列 is Boolean type");  
168.                     value = cell.getBooleanCellValue();  
169.                     break;  
170.                 case XSSFCell.CELL_TYPE_BLANK:  
171.                     System.out.println(i + "行" + j + " 列 is Blank type");  
172.                     value = "";  
173.                     break;  
174.                 default:  
175.                     System.out.println(i + "行" + j + " 列 is default type");  
176.                     value = cell.toString();  
177.                 }  
178.                 if (value == null || "".equals(value)) {  
179.                     continue;  
180.                 }  
181.                 linked.add(value);  
182.             }  
183.             list.add(linked);  
184.         }  
185.         return list;  
186.     }  
187.   
188. }  

三：測試

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1. package com.debo.utils;  
2.   
3. import java.io.File;  
4. import java.io.IOException;  
5. import java.util.List;  
6.   
7. public class Test {  
8.       
9.     public static void main(String[] args) throws IOException {  
10.         File file = new File("D:/2.xlsx");  
11.         List<List<Object>> readExcel = ImportExcellUtils.readExcel(file);  
12.         for (int i = 0; i < readExcel.size(); i++) {  
13.             System.out.println(readExcel.get(i));  
14.         }  
15.     }  
16.   
17. }