Java 去除excel表格内容中的空格

package cn.edu.cust.demo;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import jxl.*;
import jxl.write.Label;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
public class ReadExcel {
	
	
	public static String replaceBlank(String str) {
        String dest = "";
        if (str!=null) {
            Pattern p = Pattern.compile("\\s*|\t|\r|\n");
            Matcher m = p.matcher(str);
            dest = m.replaceAll("");
        }
        return dest;
    }
	
	
	public static void writeExcelPOI(int x,int y,String s) {
        try {

            String fileName = "E://hello.xls";  //修改e盘的in.xls文件
            XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(fileName));
            XSSFSheet xSheet = xwb.getSheetAt(0);  //获取excel表的第一个sheet
                
                    XSSFCell xCell=xSheet.getRow(x).getCell(y); //获取单元格对象，这块不能向上边那两句代码那么写，不能用createXXX，用的话会只把第一列的数据改掉
                    xCell.setCellValue(s);//修改数据，看数据是否和字段集合中的数据匹配，不匹配使用元数据
//                    System.out.println(fields.get(fillSplit[0].trim()));
            

            FileOutputStream out = new FileOutputStream(fileName);
            xwb.write(out);
            out.close();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
	  
	
	 public static void main(String[] args) {  
	        int i;  
	        Sheet sheet;  
	        Workbook book;  
	        Cell cell1,cell2,cell3,cell4,cell5,cell6,cell7;  
	        try {   
	            //hello.xls为要读取的excel文件名  
	            book= Workbook.getWorkbook(new File("E://in.xls"));   
	              
	            //获得第一个工作表对象(ecxel中sheet的编号从0开始,0,1,2,3,....)  
	            sheet=book.getSheet(0);   
	            //获取左上角的单元格  
	            cell1=sheet.getCell(0,0);  
//	            System.out.println("标题："+cell1.getContents());  
	          String content[]=new String[2000];
	          String content1[]=new String[2000];
	            i=1;  
	            while(true)  
	            {  
	            	try
	            	{
	            		//获取每一行的单元格   
//		                cell1=sheet.getCell(0,i);//（列，行）  
//		                cell2=sheet.getCell(1,i);  
//		                cell3=sheet.getCell(2,i);  
//		                cell4=sheet.getCell(3,i);  
		                cell5=sheet.getCell(4,i);  
//		                cell6=sheet.getCell(5,i);  
		                cell7=sheet.getCell(7,i);  
		                if("".equals(cell1.getContents())==true)    //如果读取的数据为空  
		                    break; 
		                System.out.println(cell5.getContents()+"\t");   
		                String words=cell5.getContents(); 
		                String words1=cell7.getContents(); 
		                String change_words= replaceBlank(words);
		                String change_words1= replaceBlank(words1);
		                System.out.println(change_words); 
		                content[i]=change_words;  
		                content1[i]=change_words1; 
		                if(i>=1999)
		                {
		                	break;
		                }
		                
	            	}
	            	catch(Exception e)
	            	{
	            		e.printStackTrace();
	            	}
	            	i++;
	            } 
                		//文件D://JEtest//read.xls 不存在，若存在数据将会丢失  
                        File file = new File("E://1//hello.xls");  
                      
                        //创建一个新的可写工作簿  
//        	            WritableWorkbook wb = Workbook.createWorkbook(file);   
//                        WritableSheet sheet1 = wb.createSheet("第二页", 1); 
//                        sheet1.addCell(new Label(0,i-1,change_words));   
                          
                      //文件D://JEtest//read.xls 不存在，若存在数据将会丢失   
                        //创建一个新的可写工作簿  
                        WritableWorkbook wb = Workbook.createWorkbook(file);   
                        
                 TWrite.write(wb,content);  
                       
                        // 写入Exel工作表   
                        wb.write();  
                        
                        // 关闭Excel工作薄对象   
                        wb.close();              
                        
	            book.close();   
	        }  
	        catch(Exception e)  { }   
	    }  
}

package cn.edu.cust.demo;

import java.io.File;  
import java.io.IOException;  
import jxl.Workbook;  
import jxl.read.biff.BiffException;  
import jxl.write.Label;  
import jxl.write.Number;  
import jxl.write.Boolean;  
import jxl.write.DateFormat;  
import jxl.write.DateTime;  
import jxl.write.NumberFormat;  
import jxl.write.WritableCellFormat;  
import jxl.write.WritableFont;  
import jxl.write.WritableSheet;  
import jxl.write.WritableWorkbook;  
import jxl.write.WriteException;  
  
  
/** 
 * 
 * @author  
 */  
public class TWrite {  
    public static void  write(WritableWorkbook wb,String str[]) throws WriteException {  
        WritableSheet wSheet = wb.createSheet("sheet1", 0);  
          for(int i=0;i