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(); } }