java读写excel文件

package com.test.IF.service;

import java.io.File;
import java.io.IOException;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

public class HandleExcelFile {
    private String excelFilePath = "D:\\test\\职员.xls";
    private String[][] nReadArray;
    private int nRows, nColumns = 0;
    Workbook xWorkbook;
    
    // 把Excel中的内容转换成二维数组后返回
    public String[][] readExcel() {
        try {
            xWorkbook = Workbook.getWorkbook(new File(excelFilePath));
            Sheet sheet = xWorkbook.getSheet(0);
            nRows = sheet.getRows();
            nColumns = sheet.getColumns();
            
            nReadArray = new String[nRows][nColumns];
            for (int i = 1; i < nRows; i++) {
                for (int j = 0; j < nColumns; j++) {
                    Cell cell = sheet.getCell(j, i); // (列, 行)
                    String content = cell.getContents();
                    nReadArray[i][j] = content;
                }
            }
        } catch (BiffException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        xWorkbook.close();
        return nReadArray;
    }
public static void main(String[] args) {
        HandleExcelFile he = new HandleExcelFile();
        String[][] xLine = he.readExcel();
        for (int i = 1; i < xLine.length; i++) {
            for (int j = 0; j < xLine[i].length; j++) {
                System.out.print(xLine[i][j] + "|");
            }
            System.out.println();
        }
    }
}

package com.test.IF.service;

import java.io.File;
import java.io.IOException;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;

public class HandleExcelFile {// 生成Excel
    public void writeExcel() {
        try {
            // 生成可写入的Workbook
            WritableWorkbook xWritableWorkbook = Workbook.createWorkbook(new File("D:\\test\\导出测试.xls"));
            
            // 生成Worksheet
            WritableSheet xSheet = WritableWorkbook.createSheet("测试sheet", 0);
            
            // 往Cell设置数据
            Label label00 = new Label(0, 0, "A");  // 0 列 0行
            Label label01 = new Label(0, 1, "B");  // 0 列 1行
            Label label02 = new Label(0, 2, "C");  // 0 列 2行
            Label label10 = new Label(1, 0, "D");  // 1 列 0行
            Label label11 = new Label(1, 1, "E");  // 1 列 1行
            Label label12 = new Label(1, 2, "F");  // 1 列 2行            
            xSheet.addCell(label00);
            xSheet.addCell(label01);
            xSheet.addCell(label02);
            xSheet.addCell(label10);
            xSheet.addCell(label11);
            xSheet.addCell(label12);            
            
            // 写入到Workbook
            xWritableWorkbook.write();
            
            // 关闭Workbook
            xWritableWorkbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (RowsExceededException e) {
            e.printStackTrace();
        } catch (WriteException e) {
            e.printStackTrace();
        } 
    }
    
    public static void main(String[] args) {
        HandleExcelFile hef = new HandleExcelFile();
        hef.writeExcel();
    }
}