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我试图在现有的Excel文件。但是，当我在写它删除我以前的数据追加数据的使用Apache POI在Java中
文件追加数据现有的Excel文件excelRead
package Excel;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.xssf.usermodel.XSSFWorkbook;
public class ExcelRead {
static int passRowCount;
int rowCount;
Sheet guru99Sheet;
Workbook guru99Workbook = null;
public void readExcel(String filePath, String fileName, String sheetName) throws IOException, InterruptedException {
// Create a object of File class to open xlsx file
System.out.println(filePath + "\\" + fileName);
File file = new File(filePath + "\\" + fileName);
// Create an object of FileInputStream class to read excel file
FileInputStream inputStream = new FileInputStream(file);
// Find the file extension by spliting file name in substring and
// getting only extension name
String fileExtensionName = fileName.substring(fileName.indexOf("."));
// Check condition if the file is xlsx file
if (fileExtensionName.equals(".xlsx")) {
System.out.println("in xlsx");
// If it is xlsx file then create object of XSSFWorkbook class
guru99Workbook = new XSSFWorkbook(inputStream);
}
// Check condition if the file is xls file
else if (fileExtensionName.equals(".xls")) {
// If it is xls file then create object of XSSFWorkbook class
guru99Workbook = new HSSFWorkbook(inputStream);
}
// Read sheet inside the workbook by its name
guru99Sheet = guru99Workbook.getSheet(sheetName);
System.out.println("getFirstRowNum: " + guru99Sheet.getFirstRowNum());
Thread.sleep(1000);
// Find number of rows in excel file
rowCount = (guru99Sheet.getLastRowNum()) - (guru99Sheet.getFirstRowNum());
System.out.println("rowcount: " + rowCount);
setRowCount(rowCount);
// Create a loop over all the rows of excel file to read it
for(
int i = 1;i<rowCount;i++)
{
Thread.sleep(1000);
// System.out.println("i: " + i);
Row row = guru99Sheet.getRow(i);
// System.out.println("getLastCellNum : " + row.getLastCellNum());
// Create a loop to print cell values in a row
for (int j = 1; j < row.getLastCellNum(); j++) {
Thread.sleep(1000);
// System.out.println("j: " + j);
// Print excel data in console
System.out.print(row.getCell(j).getStringCellValue() + " ");
// System.out.println("\n");
}
System.out.println();
}
}
public void setRowCount(int rc){
passRowCount =rc;
}
public int getRowCount(){
return passRowCount;
}
}
文件MainFile
package Excel;
import java.io.IOException;
public class MainFile {
public static void main(String[] args) throws IOException, InterruptedException {
ExcelRead objExcelFile = new ExcelRead();
// Prepare the path of excel file
String filePath = System.getProperty("user.dir") + "\\src\\Excel\\";
// Call read file method of the class to read data
objExcelFile.readExcel(filePath, "TestCase2.xlsx", "Java Books");
AppendDataInExcel appendData = new AppendDataInExcel();
appendData.append();
}
}
AppendDataInExcel
package Excel;
import java.io.File;
import java.io.FileOutputStream;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class AppendDataInExcel {
ExcelRead excelRead = new ExcelRead();
public void append() {
int rowc = excelRead.getRowCount();
System.out.println("rowCountIn Append: " + rowc);
appendWrite(rowc);
}
public void appendWrite(int rowc) {
Object[][] bookData = { { "geography", "ali", "e" }, { "chemistry", "Joeloch", "f" }, { "Code", "rahul", "g" },
{ "phyysics", "banl", "h" }, };
for (Object[] aBook : bookData) {
Row row = s.createRow(++rowc);
System.out.println("Row: " + row.getRowNum());
int columnCount = 0;
for (Object field : aBook) {
Cell cell = row.createCell(++columnCount);
if (field instanceof String) {
cell.setCellValue((String) field);
} else if (field instanceof Integer) {
cell.setCellValue((Integer) field);
}
}
}
try {
FileOutputStream outputStream = new FileOutputStream(
new File(System.getProperty("user.dir") + "\\src\\Excel\\TestCase2.xlsx"));
workbook.write(outputStream);
System.out.println("Wrote in Excel");
} catch (Exception e) {
System.out.println("Exception: " + e);
}
}
}
有时整个以前的excel数据deleted.Just希望解决方案追加数据在现有行的末尾。这个概念用于记录我的测试脚本的执行与时间戳。每当我运行脚本它会写在现有的Excel中，所以我可以看到我执行的所有历史记录
嗨，实际上，如果我创建字符串sheetName =“Java Books”，XSSFWorkbook workbook = new XSSFWorkbook（）; XSSFSheet sheet = workbook..getSheet（sheetName）;在方法appendWrite（）中。我可以写在Excel中，但它打开了新的Excel。但是当我试图从类ExcelRead传递XSSFSheet和XSSFWorkbook的实例，然后Excel变成空白。所以我应该修改我的代码。 – DoubtClear