原文https://www.cnblogs.com/wangyang108/p/6030420.html
Excel是我们平时工作中比较常用的用于存储二维表数据的，JAVA也可以直接对Excel进行操作，在这篇博客中将为大家介绍两种操作Excel的方式，分别为：jxl和poi。
对于两者的区别网上有测试如下：
测试结果
类型 数据量(行) 执行时间(ms) 执行时间(ms) 执行时间(ms) 平均时间(ms)
POI 1000 579 562 532 558
JXL 1000 500 469 484 484
POI 5000 984 984 969 979
JXL 5000 922 860 890 891
POI 10000 1609 1594 1641 1615
JXL 10000 1437 1453 1406 1432
POI 30000 3782 3765 3828 3792
JXL 30000 3922 3906 3922 3917
POI 50000 5953 6484 5859 6099
JXL 50000 6765 7421 6984 7057
在小数据量时jxl快于poi，在大数据量时poi要快于jxl。但差距都不明显。
（一）jxl
写Excel
import java.io.File; import java.io.IOException; import jxl.Workbook; import jxl.write.Label; import jxl.write.WritableSheet; import jxl.write.WritableWorkbook; import jxl.write.WriteException; /** * jxl写Excel * * @author jianggujin * */ public class JxlWriteDemo { public static void main(String[] args) throws IOException, WriteException { File xlsFile = new File("jxl.xls"); // 创建一个工作簿 WritableWorkbook workbook = Workbook.createWorkbook(xlsFile); // 创建一个工作表 WritableSheet sheet = workbook.createSheet("sheet1", 0); for (int row = 0; row < 10; row++) { for (int col = 0; col < 10; col++) { // 向工作表中添加数据 sheet.addCell(new Label(col, row, "data" + row + col)); } } workbook.write(); workbook.close(); } }
读Excel
import java.io.File; import java.io.IOException; import jxl.Sheet; import jxl.Workbook; import jxl.read.biff.BiffException; /** * jxl读excel * * @author jianggujin * */ public class JxlReadDemo { public static void main(String[] args) throws BiffException, IOException { File xlsFile = new File("jxl.xls"); // 获得工作簿对象 Workbook workbook = Workbook.getWorkbook(xlsFile); // 获得所有工作表 Sheet[] sheets = workbook.getSheets(); // 遍历工作表 if (sheets != null) { for (Sheet sheet : sheets) { // 获得行数 int rows = sheet.getRows(); // 获得列数 int cols = sheet.getColumns(); // 读取数据 for (int row = 0; row < rows; row++) { for (int col = 0; col < cols; col++) { System.out.printf("%10s", sheet.getCell(col, row) .getContents()); } System.out.println(); } } } workbook.close(); } }
（二）poi
写Excel
import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; /** * Poi写Excel * * @author jianggujin * */ public class PoiWriteDemo { public static void main(String[] args) throws IOException { // 创建工作薄 HSSFWorkbook workbook = new HSSFWorkbook(); // 创建工作表 HSSFSheet sheet = workbook.createSheet("sheet1"); for (int row = 0; row < 10; row++) { HSSFRow rows = sheet.createRow(row); for (int col = 0; col < 10; col++) { // 向工作表中添加数据 rows.createCell(col).setCellValue("data" + row + col); } } File xlsFile = new File("poi.xls"); FileOutputStream xlsStream = new FileOutputStream(xlsFile); workbook.write(xlsStream); } }
读Excel
import java.io.File; import java.io.IOException; import org.apache.poi.openxml4j.exceptions.InvalidFormatException; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.usermodel.WorkbookFactory; /** * Poi写Excel * * @author jianggujin * */ public class PoiReadDemo { public static void main(String[] args) throws IOException, InvalidFormatException { File xlsFile = new File("poi.xls"); // 获得工作簿 Workbook workbook = WorkbookFactory.create(xlsFile); // 获得工作表个数 int sheetCount = workbook.getNumberOfSheets(); // 遍历工作表 for (int i = 0; i < sheetCount; i++) { Sheet sheet = workbook.getSheetAt(i); // 获得行数 int rows = sheet.getLastRowNum() + 1; // 获得列数，先获得一行，在得到改行列数 Row tmp = sheet.getRow(0); if (tmp == null) { continue; } int cols = tmp.getPhysicalNumberOfCells(); // 读取数据 for (int row = 0; row < rows; row++) { Row r = sheet.getRow(row); for (int col = 0; col < cols; col++) { System.out.printf("%10s", r.getCell(col).getStringCellValue()); } System.out.println(); } } } }
