Java代码

1. import java.io.BufferedInputStream;
2. import java.io.File;
3. import java.io.FileInputStream;
4. import java.io.FileNotFoundException;
5. import java.io.IOException;
6. import java.text.DecimalFormat;
7. import java.text.SimpleDateFormat;
8. import java.util.ArrayList;
9. import java.util.Arrays;
10. import java.util.Date;
11. import java.util.List;
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.poifs.filesystem.POIFSFileSystem;
18. public class ExcelOperate {
19. public static void main(String[] args) throws Exception {
20. File file = new File("ExcelDemo.xls");
21. String[][] result = getData(file, 1);
22. int rowLength = result.length;
23. for(int i=0;i<rowLength;i++) {
24. for(int j=0;j<result[i].length;j++) {
25. System.out.print(result[i][j]+"\t\t");
26. }
27. System.out.println();
28. }
29. }
30. public static String[][] getData(File file, int ignoreRows)
31. throws FileNotFoundException, IOException {
32. List<String[]> result = new ArrayList<String[]>();
33. int rowSize = 0;
34. BufferedInputStream in = new BufferedInputStream(new FileInputStream(
35. file));
36. // 打开HSSFWorkbook
37. POIFSFileSystem fs = new POIFSFileSystem(in);
38. HSSFWorkbook wb = new HSSFWorkbook(fs);
39. HSSFCell cell = null;
40. for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {
41. HSSFSheet st = wb.getSheetAt(sheetIndex);
42. // 第一行为标题，不取
43. for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {
44. HSSFRow row = st.getRow(rowIndex);
45. if (row == null) {
46. continue;
47. }
48. int tempRowSize = row.getLastCellNum() + 1;
49. if (tempRowSize > rowSize) {
50. rowSize = tempRowSize;
51. }
52. String[] values = new String[rowSize];
53. Arrays.fill(values, "");
54. boolean hasValue = false;
55. for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {
56. String value = "";
57. cell = row.getCell(columnIndex);
58. if (cell != null) {
59. // 注意：一定要设成这个，否则可能会出现乱码
60. cell.setEncoding(HSSFCell.ENCODING_UTF_16);
61. switch (cell.getCellType()) {
62. case HSSFCell.CELL_TYPE_STRING:
63. value = cell.getStringCellValue();
64. break;
65. case HSSFCell.CELL_TYPE_NUMERIC:
66. if (HSSFDateUtil.isCellDateFormatted(cell)) {
67. Date date = cell.getDateCellValue();
68. if (date != null) {
69. value = new SimpleDateFormat("yyyy-MM-dd")
70. .format(date);
71. } else {
72. value = "";
73. }
74. } else {
75. value = new DecimalFormat("0").format(cell
76. .getNumericCellValue());
77. }
78. break;
79. case HSSFCell.CELL_TYPE_FORMULA:
80. // 导入时如果为公式生成的数据则无值
81. if (!cell.getStringCellValue().equals("")) {
82. value = cell.getStringCellValue();
83. } else {
84. value = cell.getNumericCellValue() + "";
85. }
86. break;
87. case HSSFCell.CELL_TYPE_BLANK:
88. break;
89. case HSSFCell.CELL_TYPE_ERROR:
90. value = "";
91. break;
92. case HSSFCell.CELL_TYPE_BOOLEAN:
93. value = (cell.getBooleanCellValue() == true ? "Y"
94. : "N");
95. break;
96. default:
97. value = "";
98. }
99. }
100. if (columnIndex == 0 && value.trim().equals("")) {
101. break;
102. }
103. values[columnIndex] = rightTrim(value);
104. hasValue = true;
105. }