今天一個同學需要處理一個excel文件,於是我便在網上搜了一下方法,順便自己研究一下。剛剛參考網上資料,使用poi庫測試了一下讀取excel文件,效果不錯,跟大家分享一下。
要讀取的excel文件內容如下:
第一列是數值型,第二列是字符型,代碼如下:
package poi; import java.io.FileInputStream; import java.io.InputStream; import java.util.Iterator; import org.apache.poi.hssf.extractor.ExcelExtractor; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.poifs.filesystem.POIFSFileSystem; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; /** * 測試poi讀取excel文件內容 * @author lihui * */ public class TestRead { /** * @param args */ public static void main(String[] args){ HSSFWorkbook wb = null; POIFSFileSystem fs = null; try { //設置要讀取的文件路徑 fs = new POIFSFileSystem(new FileInputStream("d:\\book1.xls")); //HSSFWorkbook相當於一個excel文件,HSSFWorkbook是解析excel2007之前的版本(xls) //之后版本使用XSSFWorkbook(xlsx) wb = new HSSFWorkbook(fs); //獲得sheet工作簿 HSSFSheet sheet = wb.getSheetAt(0); //獲得行 HSSFRow row = sheet.getRow(3); //獲得行中的列,即單元格 HSSFCell cell = row.getCell(0); //獲得單元格中的值,這里該單元格的值為數字,所以使用getNumericCellValue,如為字符串則會報錯 //如何取別的值,見print2方法 double msg = cell.getNumericCellValue(); System.out.println(msg); print1(); print2(); } catch (Exception e) { e.printStackTrace(); } } public static void print1() throws Exception { InputStream is = new FileInputStream("d:\\book1.xls"); HSSFWorkbook wb = new HSSFWorkbook(new POIFSFileSystem(is)); //A text extractor for Excel files. //Returns the textual content of the file, suitable for indexing by something like Lucene, //but not really intended for display to the user. //用來獲得整個excel文件的內容,表示為字符串 ExcelExtractor extractor = new ExcelExtractor(wb); //字符串所包含的類型,詳見api extractor.setIncludeSheetNames(true); extractor.setFormulasNotResults(false); extractor.setIncludeCellComments(true); //獲得字符串形式 String text = extractor.getText(); System.out.println(text); } public static void print2() throws Exception { HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream( "d:\\book1.xls")); HSSFSheet sheet = wb.getSheetAt(0); //迭代行 for (Iterator<Row> iter = (Iterator<Row>) sheet.rowIterator(); iter .hasNext();) { Row row = iter.next(); //迭代列 for (Iterator<Cell> iter2 = (Iterator<Cell>) row.cellIterator(); iter2 .hasNext();) { Cell cell = iter2.next(); //用於測試的文件就2列,第一列為數字,第二列為字符串 //對於數字cell.getCellType的值為HSSFCell.CELL_TYPE_NUMERIC,為0 //對於字符串cell.getCellType的值為HSSFCell.CELL_TYPE_STRING,為1 //完整的類型列表請查看api String content = cell.getCellType()==HSSFCell.CELL_TYPE_NUMERIC?cell.getNumericCellValue()+"":cell.getStringCellValue(); System.out.println(content); } } } }
下面是創建一個excel文件
1 package poi; 2 3 import java.io.FileOutputStream; 4 import java.util.Date; 5 6 import org.apache.poi.hssf.usermodel.HSSFCell; 7 import org.apache.poi.hssf.usermodel.HSSFCellStyle; 8 import org.apache.poi.hssf.usermodel.HSSFDataFormat; 9 import org.apache.poi.hssf.usermodel.HSSFFont; 10 import org.apache.poi.hssf.usermodel.HSSFHyperlink; 11 import org.apache.poi.hssf.usermodel.HSSFRow; 12 import org.apache.poi.hssf.usermodel.HSSFSheet; 13 import org.apache.poi.hssf.usermodel.HSSFWorkbook; 14 import org.apache.poi.hssf.util.CellRangeAddress; 15 import org.apache.poi.hssf.util.HSSFColor; 16 17 public class TestWrite { 18 19 /** 20 * @param args 21 */ 22 public static void main(String[] args) throws Exception { 23 // 創建Excel的工作書冊 Workbook,對應到一個excel文檔 24 HSSFWorkbook wb = new HSSFWorkbook(); 25 26 // 創建Excel的工作sheet,對應到一個excel文檔的tab 27 HSSFSheet sheet = wb.createSheet("sheet1"); 28 29 // 設置excel每列寬度 30 sheet.setColumnWidth(0, 4000); 31 sheet.setColumnWidth(1, 3500); 32 33 // 創建字體樣式 34 HSSFFont font = wb.createFont(); 35 font.setFontName("Verdana"); 36 font.setBoldweight((short) 100); 37 font.setFontHeight((short) 300); 38 font.setColor(HSSFColor.BLUE.index); 39 40 // 創建單元格樣式 41 HSSFCellStyle style = wb.createCellStyle(); 42 style.setAlignment(HSSFCellStyle.ALIGN_CENTER); 43 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); 44 style.setFillForegroundColor(HSSFColor.LIGHT_TURQUOISE.index); 45 style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); 46 47 // 設置邊框 48 style.setBottomBorderColor(HSSFColor.RED.index); 49 style.setBorderBottom(HSSFCellStyle.BORDER_THIN); 50 style.setBorderLeft(HSSFCellStyle.BORDER_THIN); 51 style.setBorderRight(HSSFCellStyle.BORDER_THIN); 52 style.setBorderTop(HSSFCellStyle.BORDER_THIN); 53 54 style.setFont(font);// 設置字體 55 56 // 創建Excel的sheet的一行 57 HSSFRow row = sheet.createRow(0); 58 row.setHeight((short) 500);// 設定行的高度 59 // 創建一個Excel的單元格 60 HSSFCell cell = row.createCell(0); 61 62 // 合並單元格(startRow,endRow,startColumn,endColumn) 63 sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 2)); 64 65 // 給Excel的單元格設置樣式和賦值 66 cell.setCellStyle(style); 67 cell.setCellValue("hello world"); 68 69 // 設置單元格內容格式 70 HSSFCellStyle style1 = wb.createCellStyle(); 71 style1.setDataFormat(HSSFDataFormat.getBuiltinFormat("h:mm:ss")); 72 73 style1.setWrapText(true);// 自動換行 74 75 row = sheet.createRow(1); 76 77 // 設置單元格的樣式格式 78 79 cell = row.createCell(0); 80 cell.setCellStyle(style1); 81 cell.setCellValue(new Date()); 82 83 // 創建超鏈接 84 HSSFHyperlink link = new HSSFHyperlink(HSSFHyperlink.LINK_URL); 85 link.setAddress("http://www.baidu.com"); 86 cell = row.createCell(1); 87 cell.setCellValue("百度"); 88 cell.setHyperlink(link);// 設定單元格的鏈接 89 90 FileOutputStream os = new FileOutputStream("e:\\workbook.xls"); 91 wb.write(os); 92 os.close(); 93 94 } 95 96 }