如何使用Apache POI读取MS Excel文件？

Question

我有一个MS-Excel文件，我想通过Apache POI读取。我之前没有做过这方面的工作，所以我不知道如何去做。谁可以帮我这个事 ？

Answer 1

public List<Record> readBooksFromExcelFile(String excelFilePath) 
     throws IOException { 

    List<Record> listBooks = new ArrayList<Record>(); 
    FileInputStream inputStream = new FileInputStream(new File(
      excelFilePath)); 

    Workbook workbook = new XSSFWorkbook(inputStream); 
    Sheet firstSheet = workbook.getSheetAt(0); 
    Iterator<Row> iterator = firstSheet.iterator(); 

    FormulaEvaluator objFormulaEvaluator = new XSSFFormulaEvaluator(
      (XSSFWorkbook) workbook); 
    DataFormatter objDefaultFormat = new DataFormatter(); 
    String cellValueStr; 

    int headingRow = 0; 

    System.out 
      .println("================== Start Reading Records From Excel =================="); 
    LogFileWriter 
      .appendToLogfile(
        "================== Start Reading Records From Excel ==================", 
        true); 

    while (iterator.hasNext()) { 

     Row nextRow = iterator.next(); 
     // to ignore the first row. 

     if (headingRow == 0) { 
      headingRow++; 
      continue; 
     } 
     Iterator<Cell> cellIterator = nextRow.cellIterator(); 
     Record aRecord = new Record(); 

     while (cellIterator.hasNext()) { 
      Cell nextCell = cellIterator.next(); 
      nextCell.setCellType(Cell.CELL_TYPE_STRING); 
      int columnIndex = nextCell.getColumnIndex(); 

      // to ignore the heading row in file. 

      switch (columnIndex) { 
      case 0: 
       // objFormulaEvaluator.evaluate(nextCell); 
       // cellValueStr = 
       // objDefaultFormat.formatCellValue(nextCell,objFormulaEvaluator); 

       cellValueStr = (String) getCellValue(nextCell); 
       cellValueStr = cellValueStr.replace(" ", ""); 
       aRecord.setIccid(cellValueStr); 

       // aRecord.setIccid((String) getCellValue(nextCell)); 
       break; 
      case 1: 
       // objFormulaEvaluator.evaluate(nextCell); 
       // cellValueStr = 
       // objDefaultFormat.formatCellValue(nextCell,objFormulaEvaluator); 
       // cellValueStr=cellValueStr.replace(" ", ""); 

       cellValueStr = (String) getCellValue(nextCell); 
       cellValueStr = cellValueStr.replace(" ", ""); 
       aRecord.setApn(cellValueStr); 
       break; 
      case 2: 
       // objFormulaEvaluator.evaluate(nextCell); 
       // cellValueStr = 
       // objDefaultFormat.formatCellValue(nextCell,objFormulaEvaluator); 
       // cellValueStr=cellValueStr.replace(" ", ""); 

       cellValueStr = (String) getCellValue(nextCell); 
       cellValueStr = cellValueStr.replace(" ", ""); 
       aRecord.setIpAddress(cellValueStr); 
       break; 
      case 3: 
       // objFormulaEvaluator.evaluate(nextCell); 
       // cellValueStr = 
       // objDefaultFormat.formatCellValue(nextCell,objFormulaEvaluator); 
       // cellValueStr=cellValueStr.replace(" ", ""); 

       cellValueStr = (String) getCellValue(nextCell); 
       cellValueStr = cellValueStr.replace(" ", ""); 
       aRecord.setPdp(cellValueStr); 
       break; 
      } 
     } 

     System.out.println("READ: " + aRecord.toString()); 
     LogFileWriter.appendToLogfile("READ: " + aRecord.toString(), true); 
     listBooks.add(aRecord); 
    } 
    // workbook.close(); 
    System.out.println("================== Finished Reading Records From Excel =================="); 
    LogFileWriter.appendToLogfile("================== Finished Reading Records From Excel ==================",true); 
    return listBooks; 
} 

private Object getCellValue(Cell cell) { 

    switch (cell.getCellType()) { 
    case Cell.CELL_TYPE_STRING: 
     return cell.getStringCellValue(); 

    case Cell.CELL_TYPE_BOOLEAN: 
     return cell.getBooleanCellValue(); 

    case Cell.CELL_TYPE_NUMERIC: 
     return cell.getNumericCellValue(); 
    } 

    return null; 
} 

这里是Record.java

public class Record { 

private String iccid; 
private String apn; 
private String ipAddress; 
private String pdp; 
public String getIccid() { 
    return iccid; 
} 
public void setIccid(String iccid) { 
    this.iccid = iccid; 
} 
public String getApn() { 
    return apn; 
} 
public void setApn(String apn) { 
    this.apn = apn; 
} 
public String getIpAddress() { 
    return ipAddress; 
} 
public void setIpAddress(String ipAddress) { 
    this.ipAddress = ipAddress; 
} 
public String getPdp() { 
    return pdp; 
} 
public void setPdp(String pdp) { 
    this.pdp = pdp; 
} 
public String toString() { 
    return "Record [iccid=" + iccid + ", apn=" + apn + ", ipAddress=" 
      + ipAddress + ", pdp=" + pdp + "]"; 
} 

}