如何使用java将xlsx文件转换为csv？
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how to convert xlsx file to csv using java?
提问by Tharani
Currently I am using below code to convert Xlsx file to csv using java.Its taking more time because below code uses iterator to do this process. but I need any other better solution to convert xlsx to csv using java.Please help me
目前我正在使用下面的代码使用 java.Its 将 Xlsx 文件转换为 csv。它需要更多时间，因为下面的代码使用迭代器来完成这个过程。但我需要任何其他更好的解决方案来使用 java 将 xlsx 转换为 csv。请帮助我
public class Test1{
static void convert(File inputFile, File outputFile) {
try {
FileOutputStream fos = new FileOutputStream(outputFile);
// Get the workbook object for XLSX file
XSSFWorkbook wBook = new XSSFWorkbook(
new FileInputStream(inputFile));
// Get first sheet from the workbook
XSSFSheet sheet = wBook.getSheetAt(0);
Row row;
Cell cell;
// Iterate through each rows from first sheet
Iterator<Row> rowIterator = sheet.iterator();
while (rowIterator.hasNext()) {
row = rowIterator.next();
// For each row, iterate through each columns
Iterator<Cell> cellIterator = row.cellIterator();
while (cellIterator.hasNext()) {
cell = cellIterator.next();
switch (cell.getCellType()) {
case Cell.CELL_TYPE_BOOLEAN:
data.append(cell.getBooleanCellValue() + ",");
break;
case Cell.CELL_TYPE_NUMERIC:
data.append(cell.getNumericCellValue() + ",");
break;
case Cell.CELL_TYPE_STRING:
data.append(cell.getStringCellValue() + ",");
break;
case Cell.CELL_TYPE_BLANK:
data.append("" + ",");
break;
default:
data.append(cell + ",");
}
}
}
fos.write(data.toString().getBytes());
fos.close();
} catch (Exception ioe) {
ioe.printStackTrace();
}
}
// testing the application
public static void main(String[] args) {
// reading file from desktop
File inputFile = new File("D:\Test.xlsx");
// writing excel data to csv
File outputFile = new File("D:\Test1.csv");
convert(inputFile, outputFile);
}
}
Thanks & Regards, Tharanya B
感谢和问候， Tharanya B
回答by Hari Krishna
Try using POI API. Here is the reference link
尝试使用 POI API。这是参考链接
回答by anurag
Simple way to convert xls/xlsx into csv by using apache POI.
使用 apache POI 将 xls/xlsx 转换为 csv 的简单方法。
public class XLSXToCSVConverter {
public InputStream convertxlstoCSV(InputStream inputStream) throws IOException, InvalidFormatException {
Workbook wb = WorkbookFactory.create(inputStream);
return csvConverter(wb.getSheetAt(0));
}
private InputStream csvConverter(Sheet sheet) {
Row row = null;
String str = new String();
for (int i = 0; i < sheet.getLastRowNum()+1; i++) {
row = sheet.getRow(i);
String rowString = new String();
for (int j = 0; j < 3; j++) {
if(row.getCell(j)==null) {
rowString = rowString + Utility.BLANK_SPACE + Utility.COMMA;
}
else {
rowString = rowString + row.getCell(j)+ Utility.COMMA;
}
}
str = str + rowString.substring(0,rowString.length()-1)+ Utility.NEXT_LINE_OPERATOR;
}
System.out.println(str);
return new ByteArrayInputStream(str.getBytes(StandardCharsets.UTF_8));
}
}
Hope this will help you , Thanks.
希望这会帮助你，谢谢。
