Question

我正在编写一个java代码，我必须比较两个excel表，无论格式如何（xls或xlsx），并复制与新excel表不同的行。然后我读到了可以接受这两种格式的WorkbookFactory。 以下是我创建的代码段：请帮助!!

    import org.apache.poi.ss.usermodel.Workbook;
    import org.apache.poi.ss.usermodel.WorkbookFactory;
    import org.apache.poi.xssf.usermodel.XSSFWorkbook;
    import org.apache.poi.ss.usermodel.CellStyle;
    import org.apache.poi.ss.usermodel.IndexedColors;

    class Compare extends CopyRow
    {   
     //<-------VARIABLES DECLARATION & INITIALISATION----->

      Workbook outputWorkbook,workbook1,workbook2;
 Sheet excel1Sheet,excel2Sheet,newSheet;

       public void compare(String fileA,String fileB)

         {
    try
    {
      if(fileA.endsWith(".xls")outputWorkbook = new XSSFWorkbook(new FileInputStream("C:/Documents and Settings/eclipse/workspace/CompareExcelV2/output.xls"));
else
outputWorkbook = new XSSFWorkbook(new FileInputStream("C:/Documents and Settings/eclipse/workspace/CompareExcelV2/output.xlsx"))
      workbook1 = WorkbookFactory.create(new File(fileA));
      workbook2 = WorkbookFactory.create(new File(fileB));

      CellStyle excel1Red = new workbook1.createCellStyle(); **//ERROR HERE**
 CellStyle excel2Green = new workbook2.createCellStyle(); **//ERROR HERE**
      CellStyle newStyle = new outputWorkbook.createCellStyle();**//ERROR HERE**

     }
   catch {}

}

我无法创建CellStyle。我收到以下错误：

workbook1 cannot be resolved to a type

workbook2 cannot be resolved to a type

outputWorkbook cannot be resolved to a type

Answer 1

如果我们接受您的代码：

if(fileA.endsWith(".xls")outputWorkbook = new XSSFWorkbook(new FileInputStream("C:/Documents and Settings/eclipse/workspace/CompareExcelV2/output.xls"));
else outputWorkbook = new XSSFWorkbook(new FileInputStream("C:/Documents and Settings/eclipse/workspace/CompareExcelV2/output.xlsx"))
workbook1 = WorkbookFactory.create(new File(fileA));
workbook2 = WorkbookFactory.create(new File(fileB));

然后还有一些事情。一个是opening from a File is lower memory than from a stream，第二个是您的代码似乎没有做您想做的事情。当我怀疑你只想要一个以后保存的新空文件时，你似乎是根据文件打开outputWorkbook。相反，如下所示：

final String path = "C:/Documents and Settings/eclipse/workspace/CompareExcelV2/";
Workbook outputWorkbook;
FileOutputStream outputTo;
if (fileA.endsWith(".xls") {
   outputWorkbook = new HSSFWorkbook();
   outputTo = new FileOutputStream(path + "output.xls");
} else {
   outputWorkbook = new XSSFWorkbook();
   outputTo = new FileOutputStream(path + "output.xlsx");
}
Workbook workbook1 = WorkbookFactory.create(new File(fileA));
Workbook workbook2 = WorkbookFactory.create(new File(fileB));

最后，请确保您的类路径中包含所有正确的jar，有关详细信息，请参阅POI网站上的the Components and their Dependencies section

如何为使用WorkbookFactory创建的工作簿创建CellStyle？

1 个答案: