import java.io.File;

import java.util.ArrayList;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import jxl.Workbook;

import jxl.write.Label;

import jxl.write.WritableSheet;

import jxl.write.WritableWorkbook;

//中文名

public class ExcelBestColumn

{

    public static void main(String argus[]) throws Exception{

        //构造数据，有两行

         List<String> row1=new ArrayList<String>();    row1.add("最合适列宽");    row1.add("这个基本可以实现");

        List<String> row2=new ArrayList<String>();    row2.add("Best Column Width");    row2.add("Haha");

        List list=new ArrayList();    list.add(row1);    list.add(row2);

        //写数据到Excel中

        WritableWorkbook book= Workbook.createWorkbook(new File("t.xls"));

        WritableSheet sheet=book.createSheet("测试",0);

        writeDataToSheet(sheet,list);

        book.write();

        book.close();

    }

    public static void writeDataToSheet(WritableSheet sheet,List<List<String>> list) throws Exception{

        int columnBestWidth[]=new  int[list.get(0).size()];    //保存最佳列宽数据的数组

        for(int i=0;i<list.size();i++){

            List<String> row=list.get(i);

            for(int j=0;j<row.size();j++){

                 sheet.addCell(new Label(j,i,row.get(j)));

                 int width=row.get(j).length()+getChineseNum(row.get(j));    ///汉字占2个单位长度

                 if(columnBestWidth[j]<width)    ///求取到目前为止的最佳列宽

                     columnBestWidth[j]=width;

            }

        }

        for(int i=0;i<columnBestWidth.length;i++){    ///设置每列宽

            sheet.setColumnView(i, columnBestWidth[i]);

        }

    }

    public static int getChineseNum(String context){    ///统计context中是汉字的个数

        int lenOfChinese=0;

        Pattern p = Pattern.compile("[\u4e00-\u9fa5]");    //汉字的Unicode编码范围

        Matcher m = p.matcher(context);

        while(m.find()){

            lenOfChinese++;

        }

        return lenOfChinese;

    }

}