最近做数据导出为Excel，特地比较了一下JXL和POI的性能，顺便记录下二者的用法
先定义一下测试条件
public class TestCondition {
/**
* 生成的记录条数
*/
public static final int RECORD_COUNT = 21000;
/**
* 模板文件
*/
public static final String TEMPLATE_FILE = "E:/MyKernelPlatformWorkspace/Template/query_order.xls";
/**
* JXL生成文件位置
*/
public static final String JXL_TARGET_FILE_NAME = "E:/MyKernelPlatformWorkspace/Template/target/jxl_order.xls";
/**
* POI生成文件位置
*/
public static final String POI_TARGET_FILE_NAME = "E:/MyKernelPlatformWorkspace/Template/target/poi_order.xls";
/**
* JXL临时文件位置
*/
public static final String JXL_TEMP_DIR = "E:/MyKernelPlatformWorkspace/Template/temp";
}
然后在此测试条件下编写JXL和POI的测试类，首先是JXL的
public class JXLExcel {
/**
* 起始行
*/
private static final int start_row = 3;
private WorkbookSettings settings;
private File target;
public JXLExcel() {
this.settings = new WorkbookSettings();
//设定JXL在生成excel文件时使用临时文件
settings.setUseTemporaryFileDuringWrite(true);
settings.setTemporaryFileDuringWriteDirectory(new File(TestCondition.JXL_TEMP_DIR));
this.target = new File(TestCondition.JXL_TARGET_FILE_NAME);
}
public void execute() throws Exception {
// 读入模板文件
Workbook template = Workbook.getWorkbook(new File(TestCondition.TEMPLATE_FILE));
WritableWorkbook worbook = Workbook.createWorkbook(target, template, settings);
// 获取第一个sheet
WritableSheet sheet = worbook.getSheet(0);
Random random = new Random();
// 循环写入数据
for(int i = 0;i < TestCondition.RECORD_COUNT;i++) {
int row = i + start_row;
sheet.insertRow(row);
Label col1 = new Label(0, row, String.valueOf(i + 1));
Label col2 = new Label(1, row, String.valueOf(random.nextLong()));
Label col3 = new Label(2, row, String.valueOf(random.nextLong()));
Label col4 = new Label(3, row, "merchant" + (i +1));
jxl.write.Number col5 = new Number(4, row, random.nextDouble());
jxl.write.Number col6 = new Number(5, row, random.nextDouble());
jxl.write.Number col7 = new Number(6, row, random.nextDouble());
jxl.write.Number col8 = new Number(7, row, random.nextDouble());
Label col9 = new Label(8, row, String.valueOf(random.nextLong()));
Label col10 = new Label(9, row, "PAY");
Label col11 = new Label(10, row, "POS");
Label col12 = new Label(11, row, "2010-09-03 12:45:13");
Label col13 = new Label(12, row, "2010-09-09 12:45:13");
Label col14 = new Label(13, row, "interface" + (i + 1));
Label col15 = new Label(14, row, "18701001830");
Label col16 = new Label(15, row, "ccbc");
Label col17 = new Label(16, row, String.valueOf(random.nextLong()));
Label col18 = new Label(17, row, String.valueOf(random.nextLong()));
jxl.write.Number col19 = new Number(18, row, random.nextDouble());
jxl.write.Number col20 = new Number(19, row, random.nextDouble());
Label col21 = new Label(20, row, "payer" + (i + 1));
Label col22 = new Label(21, row, String.valueOf(random.nextLong()));
Label col23 = new Label(22, row, "192.168.1.1");
Label col24 = new Label(23, row, "192.168.1.1");
sheet.addCell(col1);
sheet.addCell(col2);
sheet.addCell(col3);
sheet.addCell(col4);
sheet.addCell(col5);
sheet.addCell(col6);
sheet.addCell(col7);
sheet.addCell(col8);
sheet.addCell(col9);
sheet.addCell(col10);
sheet.addCell(col11);
sheet.addCell(col12);
sheet.addCell(col13);
sheet.addCell(col14);
sheet.addCell(col15);
sheet.addCell(col16);
sheet.addCell(col17);
sheet.addCell(col18);
sheet.addCell(col19);
sheet.addCell(col20);
sheet.addCell(col21);
sheet.addCell(col22);
sheet.addCell(col23);
sheet.addCell(col24);
}
worbook.write();
worbook.close();
}
}
执行Main函数
public class JXLMain {
/**
* 描述：
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
long jxlStart = System.currentTimeMillis();
JXLExcel jxl = new JXLExcel();
jxl.execute();
long jxlStop = System.currentTimeMillis();
System.out.println("jxl takes : " + (jxlStop - jxlStart)/1000 + " seconds.");
}
然后是POI的
public class POIExcel {
/**
* 起始行
*/
private static final int start_row = 3;
public void execute() throws Exception {
// 读入模板文件
InputStream is = new FileInputStream(TestCondition.TEMPLATE_FILE);
POIFSFileSystem poifsFileSystem = new POIFSFileSystem(is);
HSSFWorkbook workbook = new HSSFWorkbook(poifsFileSystem);
// 获取第一个sheet
HSSFSheet sheet = workbook.getSheetAt(0);
Random random = new Random();
// 将模板的最后两行移动
sheet.shiftRows(3, 4, TestCondition.RECORD_COUNT);
OutputStream os = new FileOutputStream(
TestCondition.POI_TARGET_FILE_NAME);
// 循环写入数据
for (int i = 0; i < TestCondition.RECORD_COUNT; i++) {
int rowNum = i + start_row;
HSSFRow row = sheet.createRow(rowNum);
HSSFCell cell1 = row.createCell(0);
cell1.setCellValue(i + 1);
HSSFCell cell2 = row.createCell(1);
cell2.setCellValue(String.valueOf(random.nextLong()));
HSSFCell cell3 = row.createCell(2);
cell3.setCellValue(String.valueOf(random.nextLong()));
HSSFCell cell4 = row.createCell(3);
cell4.setCellValue("merchant" + (i +1));
HSSFCell cell5 = row.createCell(4);
cell5.setCellValue(random.nextDouble());
HSSFCell cell6 = row.createCell(5);
cell6.setCellValue(random.nextDouble());
HSSFCell cell7 = row.createCell(6);
cell7.setCellValue(random.nextDouble());
HSSFCell cell8 = row.createCell(7);
cell8.setCellValue(random.nextDouble());
HSSFCell cell9 = row.createCell(8);
cell9.setCellValue(String.valueOf(random.nextLong()));
HSSFCell cell10 = row.createCell(9);
cell10.setCellValue("PAY");
HSSFCell cell11 = row.createCell(10);
cell11.setCellValue("POS");
HSSFCell cell12 = row.createCell(11);
cell12.setCellValue(new Date());
HSSFCell cell13 = row.createCell(12);
cell13.setCellValue(new Date());
HSSFCell cell14 = row.createCell(13);
cell14.setCellValue("interface" + (i + 1));
HSSFCell cell15 = row.createCell(14);
cell15.setCellValue("18701001830");
HSSFCell cell16 = row.createCell(15);
cell16.setCellValue("ccbc");
HSSFCell cell17 = row.createCell(16);
cell17.setCellValue(String.valueOf(random.nextLong()));
HSSFCell cell18 = row.createCell(17);
cell18.setCellValue(String.valueOf(random.nextLong()));
HSSFCell cell19 = row.createCell(18);
cell19.setCellValue(random.nextDouble());
HSSFCell cell20 = row.createCell(19);
cell20.setCellValue(random.nextDouble());
HSSFCell cell21 = row.createCell(20);
cell21.setCellValue("payer" + (i + 1));
HSSFCell cell22 = row.createCell(21);
cell22.setCellValue(String.valueOf(random.nextLong()));
HSSFCell cell23 = row.createCell(22);
cell23.setCellValue("192.168.1.1");
HSSFCell cell24 = row.createCell(23);
cell24.setCellValue("192.168.1.1");
}
workbook.write(os);
os.close();
}
执行Main函数
public class POIMain {
/**
* 描述：
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
long jxlStart = System.currentTimeMillis();
POIExcel poi = new POIExcel();
poi.execute();
long jxlStop = System.currentTimeMillis();
System.out.println("poi takes : " + (jxlStop - jxlStart)/1000 + " seconds.");
}
}
经过测试发现，在默认的JVM内存下，24列数据，POI在15000行以上就会发生out of memory异常，而jxl到21000以上才会发生异常，jxl使用时急着开启使用临时文件，可以有效地提高导出性能。
另外POI支持excel2003和2007，而jxl只支持excel2003。
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