小白求帮助 jxl实现excel的修改

实现一个方法，判断表1中 A列第一行的值是否为X，若是则将B列同行的值赋值到表2中C列第一行
依次往下循环
下面是我的思路，求大神帮忙看看如何实现
package com.excelchange;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import jxl.CellType;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;
import jxl.write.Label;
import jxl.write.WritableCell;
import jxl.write.WritableSheet;

public class ExcelChange {
//workbook=sheet[];sheet=cell[][];
Workbook wb=null;
Sheet sheet=null;

public Sheet input(String sourcepath,int page) throws BiffException, FileNotFoundException, IOException{
    //读取excel到workbook类对象;page=0是第一页
    Workbook wb=Workbook.getWorkbook(new FileInputStream(sourcepath));
    Sheet st=wb.getSheet(page);
    return sheet;
}

public void output(String targetpath,int page,int type) throws BiffException, FileNotFoundException, IOException{
    Workbook wb=Workbook.getWorkbook(new FileInputStream(targetpath));
    Sheet st=wb.getSheet(page);
    //输出excel
    //case
    switch(type)
    {
    case 1:
    wb.setCell(st,x,y);
    break;

/*  case 2:语句2;
    default:语句;
    */

    }
    wb.write();
    wb.close();
}

public int type(Sheet sheet){
    //判断表格类型
    int type=0;
    String c=getCell(sheet,2,3,0);
    //用case判断
    switch(c)
    {
    case "3602013619200130631":type=1;          
    break;
    case "123": type =2;
    break;
    }
    return type;
}

public String getCell(Sheet sheet,int x,int y,int page){
    //获取指定单元格内容
    Sheet st=wb.getSheet(page); //获取第一个sheet
    WritableCell cell =((WritableSheet) sheet).getWritableCell(x, y);//获取第一个单元格
    String a=cell.toString();
    return a;
}

public void setCell(Sheet sheet,int x,int y){
    //设置指定单元格内容
    Sheet st=wb.getSheet(0);
    WritableSheet sheet1 = (WritableSheet) wb.getSheet(0);   
    WritableCell cell1 = sheet1.getWritableCell(x,y);   
    Label l = (Label) cell1;   
    l.setString(getCell(st,x,y,0));
}

}

http://blog.csdn.net/wugouzi/article/details/12951381