使用poi读写excel文件

使用poi库测试了一下读取excel文件，效果不错，跟大家分享一下。

第一列是数值型，第二列是字符型，代码如下：

 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;

 /**
  * 测试poi读取excel文件内容
  * @author lihui
  *
  */
 public class TestRead {

         /**
          * @param args
          */
         public static void main(String[] args){

                 HSSFWorkbook wb = null;
                 POIFSFileSystem fs = null;
                 try {
                         //设置要读取的文件路径
                         fs = new POIFSFileSystem(new FileInputStream("d:\\book1.xls"));
                         //HSSFWorkbook相当于一个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);
                         //获得sheet工作簿
                         HSSFSheet sheet = wb.getSheetAt(0);
                         //获得行
                         HSSFRow row = sheet.getRow(3);
                         //获得行中的列，即单元格
                         HSSFCell cell = row.getCell(0);
                         //获得单元格中的值，这里该单元格的值为数字，所以使用getNumericCellValue，如为字符串则会报错
                         //如何取别的值，见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.
                 //用来获得整个excel文件的内容，表示为字符串
                 ExcelExtractor extractor = new ExcelExtractor(wb);
                 //字符串所包含的类型，详见api
                 extractor.setIncludeSheetNames(true);
                 extractor.setFormulasNotResults(false);
                 extractor.setIncludeCellComments(true);
                 //获得字符串形式
                 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();
                                 //用于测试的文件就2列，第一列为数字，第二列为字符串
                                 //对于数字cell.getCellType的值为HSSFCell.CELL_TYPE_NUMERIC，为0
                                 //对于字符串cell.getCellType的值为HSSFCell.CELL_TYPE_STRING，为1
                                 //完整的类型列表请查看api
                                 String content = cell.getCellType()==HSSFCell.CELL_TYPE_NUMERIC?cell.getNumericCellValue()+"":cell.getStringCellValue();
                                 System.out.println(content);
                         }
                 }
         }

 }

下面是创建一个excel文件

 package poi;

 import java.io.FileOutputStream;
 import java.util.Date;

 import org.apache.poi.hssf.usermodel.HSSFCell;
 import org.apache.poi.hssf.usermodel.HSSFCellStyle;
 import org.apache.poi.hssf.usermodel.HSSFDataFormat;
 import org.apache.poi.hssf.usermodel.HSSFFont;
 import org.apache.poi.hssf.usermodel.HSSFHyperlink;
 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.hssf.util.CellRangeAddress;
 import org.apache.poi.hssf.util.HSSFColor;

 public class TestWrite {

         /**
          * @param args
          */
         public static void main(String[] args) throws Exception {
                 // 创建Excel的工作书册 Workbook,对应到一个excel文档
                 HSSFWorkbook wb = new HSSFWorkbook();

                 // 创建Excel的工作sheet,对应到一个excel文档的tab
                 HSSFSheet sheet = wb.createSheet("sheet1");

                 // 设置excel每列宽度
                 sheet.setColumnWidth(0, 4000);
                 sheet.setColumnWidth(1, 3500);

                 // 创建字体样式
                 HSSFFont font = wb.createFont();
                 font.setFontName("Verdana");
                 font.setBoldweight((short) 100);
                 font.setFontHeight((short) 300);
                 font.setColor(HSSFColor.BLUE.index);

                 // 创建单元格样式
                 HSSFCellStyle style = wb.createCellStyle();
                 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
                 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
                 style.setFillForegroundColor(HSSFColor.LIGHT_TURQUOISE.index);
                 style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

                 // 设置边框
                 style.setBottomBorderColor(HSSFColor.RED.index);
                 style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
                 style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
                 style.setBorderRight(HSSFCellStyle.BORDER_THIN);
                 style.setBorderTop(HSSFCellStyle.BORDER_THIN);

                 style.setFont(font);// 设置字体

                 // 创建Excel的sheet的一行
                 HSSFRow row = sheet.createRow(0);
                 row.setHeight((short) 500);// 设定行的高度
                 // 创建一个Excel的单元格
                 HSSFCell cell = row.createCell(0);

                 // 合并单元格(startRow，endRow，startColumn，endColumn)
                 sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 2));

                 // 给Excel的单元格设置样式和赋值
                 cell.setCellStyle(style);
                 cell.setCellValue("hello world");

                 // 设置单元格内容格式
                 HSSFCellStyle style1 = wb.createCellStyle();
                 style1.setDataFormat(HSSFDataFormat.getBuiltinFormat("h:mm:ss"));

                 style1.setWrapText(true);// 自动换行

                 row = sheet.createRow(1);

                 // 设置单元格的样式格式

                 cell = row.createCell(0);
                 cell.setCellStyle(style1);
                 cell.setCellValue(new Date());

                 // 创建超链接
                 HSSFHyperlink link = new HSSFHyperlink(HSSFHyperlink.LINK_URL);
                 link.setAddress("http://www.baidu.com");
                 cell = row.createCell(1);
                 cell.setCellValue("百度");
                 cell.setHyperlink(link);// 设定单元格的链接

                 FileOutputStream os = new FileOutputStream("e:\\workbook.xls");
                 wb.write(os);
                 os.close();

         }

 }