excel读取

1. import java.io.BufferedWriter;  
2. import java.io.File;  
3. import java.io.FileInputStream;  
4. import java.io.FileWriter;  
5. import java.io.IOException;  
6. import java.io.InputStream;  
7. import java.text.SimpleDateFormat;  
8.   
9. import org.apache.poi.hssf.usermodel.HSSFWorkbook;  
10. import org.apache.poi.ss.usermodel.Cell;  
11. import org.apache.poi.ss.usermodel.DateUtil;  
12. import org.apache.poi.ss.usermodel.Row;  
13. import org.apache.poi.ss.usermodel.Sheet;  
14. import org.apache.poi.ss.usermodel.Workbook;  
15. import org.apache.poi.xssf.usermodel.XSSFWorkbook;  
16.   
17. public class ReadWriteExcel {  
18.   
19.     private static final String EXCEL_XLS = "xls";  
20.     private static final String EXCEL_XLSX = "xlsx";  
21.   
22.     /** 
23.      * 判断Excel的版本,获取Workbook 
24.      * @param in 
25.      * @param filename 
26.      * @return 
27.      * @throws IOException 
28.      */  
29.     public static Workbook getWorkbok(InputStream in,File file) throws IOException{  
30.         Workbook wb = null;  
31.         if(file.getName().endsWith(EXCEL_XLS)){  //Excel 2003  
32.             wb = new HSSFWorkbook(in);  
33.         }else if(file.getName().endsWith(EXCEL_XLSX)){  // Excel 2007/2010  
34.             wb = new XSSFWorkbook(in);  
35.         }  
36.         return wb;  
37.     }  
38.   
39.     /** 
40.      * 判断文件是否是excel 
41.      * @throws Exception  
42.      */  
43.     public static void checkExcelVaild(File file) throws Exception{  
44.         if(!file.exists()){  
45.             throw new Exception("文件不存在");  
46.         }  
47.         if(!(file.isFile() && (file.getName().endsWith(EXCEL_XLS) || file.getName().endsWith(EXCEL_XLSX)))){  
48.             throw new Exception("文件不是Excel");  
49.         }  
50.     }  
51.   
52.     /** 
53.      * 读取Excel测试，兼容 Excel 2003/2007/2010 
54.      * @throws Exception  
55.      */  
56.     public static void main(String[] args) throws Exception {  
57.         SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");  
58.         BufferedWriter bw = new BufferedWriter(new FileWriter(new File("E:/xxx/InsertSql.txt")));  
59.         try {  
60.             // 同时支持Excel 2003、2007  
61.             File excelFile = new File("E:/xxx.xlsx"); // 创建文件对象  
62.             FileInputStream is = new FileInputStream(excelFile); // 文件流  
63.             checkExcelVaild(excelFile);  
64.             Workbook workbook = getWorkbok(is,excelFile);  
65.             //Workbook workbook = WorkbookFactory.create(is); // 这种方式 Excel2003/2007/2010都是可以处理的  
66.   
67.             int sheetCount = workbook.getNumberOfSheets(); // Sheet的数量  
68.             /** 
69.              * 设置当前excel中sheet的下标：0开始 
70.              */  
71.             Sheet sheet = workbook.getSheetAt(0);   // 遍历第一个Sheet  
72.   
73.             // 为跳过第一行目录设置count  
74.             int count = 0;  
75.   
76.             for (Row row : sheet) {  
77.                 // 跳过第一行的目录  
78.                 if(count == 0){  
79.                     count++;  
80.                     continue;  
81.                 }  
82.                 // 如果当前行没有数据，跳出循环  
83.                 if(row.getCell(0).toString().equals("")){  
84.                     return ;  
85.                 }  
86.                 String rowValue = "";  
87.                 for (Cell cell : row) {  
88.                     if(cell.toString() == null){  
89.                         continue;  
90.                     }  
91.                     int cellType = cell.getCellType();  
92.                     String cellValue = "";  
93.                     switch (cellType) {  
94.                         case Cell.CELL_TYPE_STRING:     // 文本  
95.                             cellValue = cell.getRichStringCellValue().getString() + "#";  
96.                             break;  
97.                         case Cell.CELL_TYPE_NUMERIC:    // 数字、日期  
98.                             if (DateUtil.isCellDateFormatted(cell)) {  
99.                                 cellValue = fmt.format(cell.getDateCellValue()) + "#";  
100.                             } else {  
101.                                 cell.setCellType(Cell.CELL_TYPE_STRING);  
102.                                 cellValue = String.valueOf(cell.getRichStringCellValue().getString()) + "#";  
103.                             }  
104.                             break;  
105.                         case Cell.CELL_TYPE_BOOLEAN:    // 布尔型  
106.                             cellValue = String.valueOf(cell.getBooleanCellValue()) + "#";  
107.                             break;  
108.                         case Cell.CELL_TYPE_BLANK: // 空白  
109.                             cellValue = cell.getStringCellValue() + "#";  
110.                             break;  
111.                         case Cell.CELL_TYPE_ERROR: // 错误  
112.                             cellValue = "错误#";  
113.                             break;  
114.                         case Cell.CELL_TYPE_FORMULA:    // 公式  
115.                             // 得到对应单元格的公式  
116.                             //cellValue = cell.getCellFormula() + "#";  
117.                             // 得到对应单元格的字符串  
118.                             cell.setCellType(Cell.CELL_TYPE_STRING);  
119.                             cellValue = String.valueOf(cell.getRichStringCellValue().getString()) + "#";  
120.                             break;  
121.                         default:  
122.                             cellValue = "#";  
123.                     }  
124.                     //System.out.print(cellValue);  
125.                     rowValue += cellValue;  
126.                 }  
127.                 writeSql(rowValue,bw);  
128.                 System.out.println(rowValue);  
129.                 System.out.println();  
130.             }  
131.             bw.flush();  
132.         } catch (Exception e) {  
133.             e.printStackTrace();  
134.         } finally{  
135.             bw.close();  
136.         }  
137.     }