Java操作Excel企业级批量处理Excel数据--大数据处理逻辑java代码

package com.tanzhou.aduio;//创始一个包
import java.io.File;//引入类
import java.io.IOException;
import java.util.Scanner;
import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.format.UnderlineStyle;
//import jxl.read.biff.BiffException;
import jxl.write.DateFormat;
import jxl.write.DateTime;
import jxl.write.Label;
import jxl.write.NumberFormat;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
//import jxl.write.WritableImage;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
//import jxl.write.WriteException;
//import jxl.write.biff.RowsExceededException;

public class TextOperatorExcel {// 操作Excel文件的类
  /**
   * 生成一个Excel文件
   */
  public static void writeExcel(String fileName) {
    WritableWorkbook wwb = null;
    try {
      //创建一个可写入的工作薄(Workbook)对象
      wwb = Workbook.createWorkbook(new File(fileName));
    } catch (IOException e) {// 捕获流异常
      e.printStackTrace();
    }
    if (wwb != null) {
      // 创建一个可写入的工作表
      // Workbook的createSheet方法有两个参数，第一个是工作表的名称，第二个是工作表在工作薄中的位置
      WritableSheet ws = wwb.createSheet("sheet1", 0);
      for (int i = 0; i < 10; i++) {// 循环添加单元格
        for (int j = 0; j < 5; j++) {
          Label labelC = new Label(j, i, "这是第" + (i + 1) + "行，第"
              + (j + 1) + "列");
          try {
            ws.addCell(labelC);// 将生成的单元格添加到工作表中
          } catch (Exception e) {// 捕获异常
            e.printStackTrace();
          }

        }
      }
      try {
        wwb.write();// 从内存中写入文件中
        wwb.close();// 从内存中写入文件中
      } catch (Exception e) {// 捕获异常
        e.printStackTrace();
      }
    }
    System.out.println("生成一个Excel文件："+fileName+"成功!");
  }
  
  /**
   * 将内容写入
   * @param fileName
   * @throws Exception
   */
  public static void writeContentToExcel(String fileName) throws Exception{
    File tempFile=new File(fileName);
    WritableWorkbook workbook = Workbook.createWorkbook(tempFile);
    WritableSheet sheet = workbook.createSheet("TestCreateExcel", 0); 
    //一些临时变量，用于写到excel中
    Label l=null;
    jxl.write.Number n=null;
    jxl.write.DateTime d=null;

    //预定义的一些字体和格式，同一个Excel中最好不要有太多格式  字形  大小  加粗 倾斜  下划线 颜色
    WritableFont headerFont = new WritableFont(WritableFont.ARIAL, 12, WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLUE); 
    WritableCellFormat headerFormat = new WritableCellFormat (headerFont); 

    WritableFont titleFont = new WritableFont(WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.RED); 
    WritableCellFormat titleFormat = new WritableCellFormat (titleFont); 

    WritableFont detFont = new WritableFont(WritableFont.ARIAL, 10, WritableFont.NO_BOLD, false, UnderlineStyle.NO_UNDERLINE, jxl.format.Colour.BLACK); 
    WritableCellFormat detFormat = new WritableCellFormat (detFont); 

    NumberFormat nf=new NumberFormat("0.00000");  //用于Number的格式
    WritableCellFormat priceFormat = new WritableCellFormat (detFont, nf); 

    DateFormat df=new DateFormat("yyyy-MM-dd");//用于日期的
    WritableCellFormat dateFormat = new WritableCellFormat (detFont, df); 

    l=new Label(0, 0, "用于测试的Excel文件", headerFormat);//创建一些单元格，再加到sheet中
    sheet.addCell(l);
    //添加标题
    int column=0;
    l=new Label(column++, 2, "标题", titleFormat);
    sheet.addCell(l);
    l=new Label(column++, 2, "日期", titleFormat);
    sheet.addCell(l);
    l=new Label(column++, 2, "货币", titleFormat);
    sheet.addCell(l);
    l=new Label(column++, 2, "价格", titleFormat);
    sheet.addCell(l);
    //添加内容
    int i=0;
    column=0;
    l=new Label(column++, i+3, "标题 "+i, detFormat);
    sheet.addCell(l);
    d=new DateTime(column++, i+3, new java.util.Date(), dateFormat);
    sheet.addCell(d);
    l=new Label(column++, i+3, "CNY", detFormat);
    sheet.addCell(l);
    n=new jxl.write.Number(column++, i+3, 5.678, priceFormat);
    sheet.addCell(n);
    i++;
    column=0;
    l=new Label(column++, i+3, "标题 "+i, detFormat);
    sheet.addCell(l);
    d=new DateTime(column++, i+3, new java.util.Date(), dateFormat);
    sheet.addCell(d);
    l=new Label(column++, i+3, "SGD", detFormat);
    sheet.addCell(l);
    n=new jxl.write.Number(column++, i+3, 98832, priceFormat);
    sheet.addCell(n);
    //设置列的宽度
    column=0;
    sheet.setColumnView(column++, 20);
    sheet.setColumnView(column++, 20);
    sheet.setColumnView(column++, 10);
    sheet.setColumnView(column++, 20);
    workbook.write();
    workbook.close();
    System.out.println("内容写入"+fileName+"成功");
  }

  public static void readExcelInfo(String fileName) 
    throws Exception {// 获得Excel文件多少行多少列
    Workbook book = Workbook.getWorkbook(new File(fileName));// 构造Workbook（工作薄）对象
    Sheet sheet = book.getSheet(0);
    // 得到第一列第一行的单元格// 获得第一个工作表对象
    int columnum = sheet.getColumns(); // 得到列数
    int rownum = sheet.getRows(); // 得到行数
    System.out.println(columnum);
    System.out.println(rownum);
    for (int i = 0; i < rownum; i++) // 循环进行读写
    {
      for (int j = 0; j < columnum; j++) {
        Cell cell1 = sheet.getCell(j, i);
        String result = cell1.getContents();
        System.out.print(result);
        System.out.print(" \t ");
      }
      System.out.println();
    }
    book.close();//关闭（工作薄）对象
  }
  
  public static void main(String[] args) {// java程序主入口处
    try {
      System.out.println("1.创建Excel文件，输入Excel文件名称（包括路径和后缀）");
      Scanner scan = new Scanner(System.in);
      final String fileName = scan.next();//获得键盘值
      writeExcel(fileName);//调用生成Excel方法
      
      System.out.println("2.将内容写入Excel文件");
      writeContentToExcel(fileName);//调用将内容写入Excel方法
      
      System.out.println("3.读取Excel文件");
      readExcelInfo(fileName);
    } catch (Exception e) {//捕获异常
      e.printStackTrace();
    }
  }
}