使用poi读取Excel文件并将其移至二维数组

我正在使用POI来读取excel文件并将其转换为二维数组。 以下是代码部分：

import java.io.FileInputStream; import org.apache.poi.ss.usermodel.CellValue; import org.apache.poi.xssf.usermodel.XSSFCell; import org.apache.poi.xssf.usermodel.XSSFRow; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; public class XlsxRead_2 { public XlsxRead_2(){ getvalue_1(); } public static void getvalue_1(){ XSSFRow row; XSSFCell cell; String [][] value =null; double[][] nums =null; try { FileInputStream inputStream = new FileInputStream("TEST.xlsx"); XSSFWorkbook workbook = new XSSFWorkbook(inputStream); //get sheet number int sheetCn = workbook.getNumberOfSheets(); for(int cn = 0; cn < sheetCn; cn++){ //get 0th sheet data XSSFSheet sheet = workbook.getSheetAt(cn); //get number of rows from sheet int rows = sheet.getPhysicalNumberOfRows(); //get number of cell from row int cells = sheet.getRow(cn).getPhysicalNumberOfCells(); for (int r = 0; r < rows; r++) { row = sheet.getRow(r); // bring row if (row != null) { for (int c = 0; c < cells; c++) { cell = row.getCell(c); value = new String[rows][cells]; nums= new double [rows][cells]; if (cell != null) { switch (cell.getCellType()) { case XSSFCell.CELL_TYPE_FORMULA: value [r][c]= cell.getCellFormula(); break; case XSSFCell.CELL_TYPE_NUMERIC: value [r][c]= "" + cell.getNumericCellValue(); break; case XSSFCell.CELL_TYPE_STRING: value [r][c]= "" + cell.getStringCellValue(); break; case XSSFCell.CELL_TYPE_BLANK: value [r][c]= "[BLANK]"; break; case XSSFCell.CELL_TYPE_ERROR: value [r][c]= "" + cell.getErrorCellValue(); break; default: } System.out.print(value); } else { System.out.print("[null]\t"); } } // for(c) System.out.print("\n"); } } // for(r) } } catch (Exception e) { e.printStackTrace(); } } public class Starter { public static void main(String[] args) { XlsxRead_2 gv=new XlsxRead_2(); } } 

但是，它没有正常工作。 在JAVA中附加了错误的结果。 当我没有使用数组，它工作正常。 任何build议表示赞赏。

 Result in java: [[Ljava.lang.String;@167fdd33[[Ljava.lang.String;@1e965684 [[Ljava.lang.String;@4d95d2a2[[Ljava.lang.String;@53f65459 [[Ljava.lang.String;@3b088d51[[Ljava.lang.String;@1786dec2 [[Ljava.lang.String;@74650e52[[Ljava.lang.String;@15d0c81b [[Ljava.lang.String;@6acdbdf5[[Ljava.lang.String;@4b1c1ea0 [[Ljava.lang.String;@3712b94[[Ljava.lang.String;@2833cc44 [[Ljava.lang.String;@33f88ab[[Ljava.lang.String;@27a8c74e 

Answer 1

你应该在第一个for循环之后创build数组。 而且你也应该为每个表格创build值数组。 还有一点你应该打印价值[R] [C]不值我希望能帮助你。

 public class XlsxRead_2 { public static void main(String[] args) { XlsxRead_2 xread2 = new XlsxRead_2(); } public XlsxRead_2() { getvalue_1(); } public static void getvalue_1() { XSSFRow row; XSSFCell cell; String[][] value = null; double[][] nums = null; try { FileInputStream inputStream = new FileInputStream("TEST.xlsx"); XSSFWorkbook workbook = new XSSFWorkbook(inputStream); // get sheet number int sheetCn = workbook.getNumberOfSheets(); for (int cn = 0; cn < sheetCn; cn++) { // get 0th sheet data XSSFSheet sheet = workbook.getSheetAt(cn); // get number of rows from sheet int rows = sheet.getPhysicalNumberOfRows(); // get number of cell from row int cells = sheet.getRow(cn).getPhysicalNumberOfCells(); value = new String[rows][cells]; for (int r = 0; r < rows; r++) { row = sheet.getRow(r); // bring row if (row != null) { for (int c = 0; c < cells; c++) { cell = row.getCell(c); nums = new double[rows][cells]; if (cell != null) { switch (cell.getCellType()) { case XSSFCell.CELL_TYPE_FORMULA: value[r][c] = cell.getCellFormula(); break; case XSSFCell.CELL_TYPE_NUMERIC: value[r][c] = "" + cell.getNumericCellValue(); break; case XSSFCell.CELL_TYPE_STRING: value[r][c] = "" + cell.getStringCellValue(); break; case XSSFCell.CELL_TYPE_BLANK: value[r][c] = "[BLANK]"; break; case XSSFCell.CELL_TYPE_ERROR: value[r][c] = ""+cell.getErrorCellValue(); break; default: } System.out.print(value[r][c]); } else { System.out.print("[null]\t"); } } // for(c) System.out.print("\n"); } } // for(r) } } catch (Exception e) { e.printStackTrace(); } } }