通过列名java POI读取excel

下午好，专家有问题，我需要阅读整个Excel文件的列名而不是索引，例如：

Column1 | Column2 | Column3 data1 data 2 data 3

POI允许我通过getColumnIndex（）返回Column1 = 0，Column2 = 1等方法来读取列索引，但是我需要通过列名“Column1”，“Column2”等来读取它，有没有办法做到这一点??

我需要按列名读取行和列的所有字段。 附上我读取我的文件的代码：

更新的代码：

此代码工作，但我需要validation列名称，因为我的项目列可能会改变位置，这是我的目标

Answer 1

为什么不读取第一行（0）单元格值（0-n）（又名列名称）并将（columnName，columnIndex）放入String / int映射中。 然后你可以通过名字来引用列索引。

这是一个例子：

Map<String, Integer> map = new HashMap<String,Integer>(); //Create map HSSFRow row = sheet.getRow(0); //Get first row //following is boilerplate from the java doc short minColIx = row.getFirstCellNum(); //get the first column index for a row short maxColIx = row.getLastCellNum(); //get the last column index for a row for(short colIx=minColIx; colIx<maxColIx; colIx++) { //loop from first to last index HSSFCell cell = row.getCell(colIx); //get the cell map.put(cell.getStringCellValue(),cell.getColumnIndex()) //add the cell contents (name of column) and cell index to the map } 

在此之后，您将有从columnName —>索引的地图。 那你可以这样做：

 int idx = map.get("ColumnName"); 

….你可以在row.getCell（idx）中使用它来获取所有其他行中的单元格。

阅读下面的代码中的评论。 除此之外，我不能帮你。 你需要阅读文档，并找出如何做到这一点。

 Workbook workbook = WorkbookFactory.create(new FileInputStream("C:\\file.xlsx")); Sheet sheet = workbook.getSheetAt(0); totalRows = sheet.getPhysicalNumberOfRows(); Map<String, Integer> map = new HashMap<String,Integer>(); //Create map HSSFRow row = sheet.getRow(0); //Get first row //following is boilerplate from the java doc short minColIx = row.getFirstCellNum(); //get the first column index for a row short maxColIx = row.getLastCellNum(); //get the last column index for a row for(short colIx=minColIx; colIx<maxColIx; colIx++) { //loop from first to last index HSSFCell cell = row.getCell(colIx); //get the cell map.put(cell.getStringCellValue(),cell.getColumnIndex()) //add the cell contents (name of column) and cell index to the map } List<ReportRow> listOfDataFromReport = new ArrayList<ReportRow>(); for(int x = 1; x<=totalRows; x++){ ReportRow rr = new ReportRow(); //Data structure to hold the data from the xls file. HSSFRow dataRow = sheet.getRow(x); //get row 1 to row n (rows containing data) int idxForColumn1 = map.get("Column1"); //get the column index for the column with header name = "Column1" int idxForColumn2 = map.get("Column2"); //get the column index for the column with header name = "Column2" int idxForColumn3 = map.get("Column3"); //get the column index for the column with header name = "Column3" HSSFCell cell1 = dataRow.getCell(idxForColumn1) //Get the cells for each of the indexes HSSFCell cell2 = dataRow.getCell(idxForColumn2) HSSFCell cell3 = dataRow.getCell(idxForColumn3) //NOTE THAT YOU HAVE TO KNOW THE DATA TYPES OF THE DATA YOU'RE EXTRACTING. //FOR EXAMPLE I DON'T THINK YOU CAN USE cell.getStringCellValue IF YOU'RE TRYING TO GET A NUMBER rr.setColumn1(cell1.getStringCellValue()); //Get the values out of those cells and put them into the report row object rr.setColumn2(cell2.getStringCellValue()); rr.setColumn3(cell3.getStringCellValue()); listOfDataFromReport.add(rr); } //Now you have a list of report rows for(int j = 0; j< listOfDataFromReport.size();j++){ System.out.println("Column 1 Value: " + listOfDataFromReport.get(j).getColumn1()) //etc... } //This class holds the values from the xls file. You may not need it // I have no idea what you're doing with the data. If you simply wanted to //print the data to console you wouldn't need it. public static class ReportRow{ private String column1; private String column2; private String column3; public String getColumn1(){ return this.column1; } public void setColumn1(String column1){ this.column1 = column1; } public String getColumn2(){ return this.column2; } public void setColumn2(String column2){ this.column2 = column2; } public String getColumn3(){ return this.column3; } public void setColumn3(String column3){ this.column3 = column3; } }