21 /** 22 * 利用POI操作Excel表单 23 * 24 * 需要jar包： 25 * HSSF针对03及以前版本，即.xls后缀 26 * |---poi-3.16.jar 27 * XSSF针对07及以后版本，即xlsx后缀 28 * |---poi-3.16.jar 29 * |---poi-ooxml.3.16.jar 30 * |---poi-ooxml-schemas-3.16.jar 31 * |---xmlbeans-2.6.0.jar 32 * |---commons-collections4-4.1.jar 33 * 34 * 工作簿：Workbook 35 * 工作表：Sheet 36 * 行： Row 37 * 表格：Cell 38 */ 39 public class Demo { 40 41 /** 42 * 读取Excel表格 43 * @throws IOEception 44 * @throws InvalidFormatException 45 * @throws EncryptedDocumentException 46 */ 47 @Test 48 public void readExcel() throws EncryptedDocumentException, InvalidFormatException, IOException { 49 //工作簿 50 Workbook workbook = WorkbookFactory.create(new File("src/userExce1.xls")); 51 //工作表 52 Sheet sheet = workbook.getSheetAt(0); 53 //行 54 Row row = sheet.getRow(1); 55 //列 56 Cell cell = row.getCell(0); 57 58 System.out.println("表格值为：" + cell.getStringCellValue()); 59 } 60 61 /** 62 * 创建Excel表格 63 * @throws IOException 64 * @throws InvalidFormatException 65 * @throws EncryptedDocumentException 66 */ 67 @Test 68 public void writeExcel() throws EncryptedDocumentException, InvalidFormatException, IOException { 69 //工作簿 70 Workbook workbook = new XSSFWorkbook(); 71 //工作表 72 Sheet sheet = workbook.createSheet("我的第一个sheet"); 73 //行 74 Row row = sheet.createRow(0); 75 //列 76 Cell cell = row.createCell(3); 77 78 cell.setCellValue("哈哈表格插入一个内容"); 79 80 workbook.write(new FileOutputStream("c:/test.xlsx")); 81 } 82 83 /** 84 * 读取Excel表格,修改样式和内容并保存 85 * @throws IOEception 86 * @throws InvalidFormatException 87 * @throws EncryptedDocumentException 88 */ 89 @Test 90 public void readAndModifyExcel() throws EncryptedDocumentException, InvalidFormatException, IOException { 91 92 String filename = "src/userExcel.xlsx"; 93 File file = new File(filename); 94 95 System.out.println(file.getAbsolutePath()); 96 97 Workbook workbook = WorkbookFactory.create(file); 98 Sheet sheet = workbook.getSheetAt(0); 99 100 //合并单元格，在工作表添加合并单元格101 CellRangeAddress headSpan = new CellRangeAddress(2, 2, 0, 4);102 sheet.addMergedRegion(headSpan);103 104 //在合并的位置设置表头文字105 Row row = sheet.createRow(0);106 Cell cell = row.createCell(0);107 cell.setCellValue("这是表头");108 109 //写入文本中110 String savedName = filename.matches("\\S+\\.xls") ? "c:/" + filename.replace("src/", "") : "c:/" + filename.replace("src/", "");111 workbook.write(new FileOutputStream(savedName));112 }113 114 } 工作簿
工作表（属于工作簿）行（属于工作表）单元格（属于行；由行和列确定）-------------操作excel
1、创建/读取工作簿2、创建/读取工作表3、创建/读取行4、创建/读取单元格 -----------excel样式合并单元格对象（CellRangeAddress）属于工作簿；运用于工作表
CellRangeAddress(int firstRow, int lastRow, int firstCol, int lastCol) 起始行号，结束行号，起始列号，结束列号
样式是属于工作簿的；运用于单元格字体是属于工作簿的；加载于样式；通用样式运用于单元格