Excel电子表格,我有一个Java程序将数据添加到新行中使用Apache POI Excel电子表格。我能第一个10行打印至电子表格,但是当我试图打印11行,它会以某种方式创建的第一行新行(没有从以前的指数继续)是这样的:将数据写入到使用Apache POI
11 Jane 300 //??
12 Jane 300 //??
Emp No. Name Salary
1 Jane 300
2 Jane 300
3 Jane 300
4 Jane 300
5 Jane 300
6 Jane 300
7 Jane 300
8 Jane 300
9 Jane 300
10 Jane 300
注意事项11日和12日上?我如何解决它们?这是我完整的Java代码:
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
public class Excel {
public static void main(String[] args) throws Exception {
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.createSheet("Sample sheet");
Map<String, Object[]> data = new HashMap<String, Object[]>();
data.put("0", new Object[] {"Emp No.", "Name", "Salary"});
for (int i=1;i<13;i++){
data.put(i + "", new Object[] {i, "Jane", "300"}); //print in different rows
}
Set<String> keyset = data.keySet();
int rownum = 0;
for (String key : keyset) {
Row row = sheet.createRow(rownum++);
Object [] objArr = data.get(key);
int cellnum = 0;
for (Object obj : objArr) {
Cell cell = row.createCell(cellnum++);
if(obj instanceof Integer)
cell.setCellValue((Integer)obj);
else if(obj instanceof Boolean)
cell.setCellValue((Boolean)obj);
else if(obj instanceof String)
cell.setCellValue((String)obj);
else if(obj instanceof Double)
cell.setCellValue((Double)obj);
}
}
try {
FileOutputStream out =
new FileOutputStream(new File("new.xls"));
workbook.write(out);
out.close();
System.out.println("Excel written successfully..");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}