一、Java操作写入普通的03和07版本的Excel二、关于03和07版本的大数据写入并比较时间三、07版本升级版的写入（SXSSFWorkbook）用到的pom文件
一、Java操作写入普通的03和07版本的Excel String PATH="/公共路径/";
@Test
public void testWrite03() throws Exception {
//1,创建一个工作簿
Workbook workbook=new HSSFWorkbook();
//2.创建一个工作表
Sheet sheet=workbook.createSheet("普通的统计表");
//3,创建一个行(1.1)
Row row1=sheet.createRow(0);
//4.创建一个单元格
Cell cell11 = row1.createCell(0);
cell11.setCellValue("第一行第一列标题");
//(1.2)
Cell cell12 = row1.createCell(1);
cell12.setCellValue("12");
// 第二行
Row row2 = sheet.createRow(1);
Cell cell21 = row2.createCell(0);
cell21.setCellValue("第二行第一列标题时间");
Cell cell22 = row2.createCell(1);
String times = new DateTime().toString("yyyy-MM-dd HH:mm:ss");
cell22.setCellValue(times);
//生成一张表
FileOutputStream fileOutputStream = new FileOutputStream(PATH+"普通03的统计表03.xls");
//输出
workbook.write(fileOutputStream);
//关闭留
fileOutputStream.close();
System.out.println("生成成功");
}
@Test
public void testWrite07() throws Exception {
//1,创建一个工作簿
Workbook workbook=new XSSFWorkbook();
//2.创建一个工作表
Sheet sheet=workbook.createSheet("普通07统计表");
//3,创建一个行(1.1)
Row row1=sheet.createRow(0);
//4.创建一个单元格
Cell cell11 = row1.createCell(0);
cell11.setCellValue("第一行第一列标题");
//(1.2)
Cell cell12 = row1.createCell(1);
cell12.setCellValue("12");
// 第二行
Row row2 = sheet.createRow(1);
Cell cell21 = row2.createCell(0);
cell21.setCellValue("第二行第一列标题时间");
Cell cell22 = row2.createCell(1);
String times = new DateTime().toString("yyyy-MM-dd HH:mm:ss");
cell22.setCellValue(times);
//生成一张表(IO流)
FileOutputStream fileOutputStream = new FileOutputStream(PATH+"普通07版本的统计表07.xlsx");
//输出
workbook.write(fileOutputStream);
//关闭留
fileOutputStream.close();
System.out.println("生成成功");
}
二、关于03和07版本的大数据写入并比较时间
String PATH="/公共路径/";
@Test
public void testWrite03BigData() throws Exception {
//用了多少时间
long begin=System.currentTimeMillis();
//创建一个工作簿
Workbook workbook = new HSSFWorkbook();
//创建一张表
Sheet sheet = workbook.createSheet();
//写入数据
for (int rowNum=0;rowNum<65536;rowNum++){
Row row = sheet.createRow(rowNum);
for (int cellNum=0;cellNum<10;cellNum++){
Cell cell = row.createCell(cellNum);
cell.setCellValue(cellNum);
}
}
System.out.println("over");
FileOutputStream fileOutputStream = new FileOutputStream(PATH+"testWrite03BigData大数据03.xls");
workbook.write(fileOutputStream);
fileOutputStream.close();
long end=System.currentTimeMillis();
System.out.println((double) (end-begin)/1000);
}
//耗时较长，优化
@Test
public void testWrite07BigData() throws Exception {
//耗时较长
//用了多少时间
long begin=System.currentTimeMillis();
//创建一个工作簿
Workbook workbook = new XSSFWorkbook();
//创建一张表
Sheet sheet = workbook.createSheet();
//写入数据
for (int rowNum=0;rowNum<65537;rowNum++){
Row row = sheet.createRow(rowNum);
for (int cellNum=0;cellNum<10;cellNum++){
Cell cell = row.createCell(cellNum);
cell.setCellValue(cellNum);
}
}
System.out.println("over");
FileOutputStream fileOutputStream = new FileOutputStream(PATH+"testWrite07BigData大数据07.xlsx");
workbook.write(fileOutputStream);
fileOutputStream.close();
long end=System.currentTimeMillis();
System.out.println((double) (end-begin)/1000);
}
三、07版本升级版的写入（SXSSFWorkbook）
String PATH="/公共路径/";
@Test
public void testWrite07BigDataS() throws Exception {
//耗时较长
//用了多少时间
long begin=System.currentTimeMillis();
//创建一个工作簿
Workbook workbook = new SXSSFWorkbook();
//创建一张表
Sheet sheet = workbook.createSheet();
//写入数据
for (int rowNum=0;rowNum<65537;rowNum++){
Row row = sheet.createRow(rowNum);
for (int cellNum=0;cellNum<10;cellNum++){
Cell cell = row.createCell(cellNum);
cell.setCellValue(cellNum);
}
}
System.out.println("over");
FileOutputStream fileOutputStream = new FileOutputStream(PATH+"testWrite07BigDataS大数据07.xlsx");
workbook.write(fileOutputStream);
fileOutputStream.close();
//清除临时文件
((SXSSFWorkbook) workbook).dispose();
long end=System.currentTimeMillis();
System.out.println((double) (end-begin)/1000);
}
用到的pom文件
org.apache.poi
poi
3.9
org.apache.poi
poi-ooxml
3.9
joda-time
joda-time
2.10.1
junit
junit
4.12
