POI

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POI 2.x 和 POI3.6有冲突

import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.util.CellRangeAddress;


/**
 * 如果 是用的POI2.x的jar包
 * Workbook wb = new HSSFWorkbook(); 会编译报错
 * POI 2.x 和 POI3.6有冲突
 * @author shengra
 *
 */
public class TestPOI {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		//创建一个EXCEL
		Workbook wb = new HSSFWorkbook();
		DataFormat format = wb.createDataFormat();
		CellStyle style;
		//创建一个SHEET
	    Sheet sheet1 = wb.createSheet("产品清单");
	    String[] title = {"编号","产品名称","产品价格","产品数量","生产日期","产地","是否出口"};
	    int i=0;
	    //创建一行
	    Row row0 = sheet1.createRow(0);
	    //填充标题
	    for (String  s:title){
	    	Cell cell = row0.createCell(i);
	    	cell.setCellValue(s);
	    	i++;
	    }
	    Row row1 = sheet1.createRow(1);
	    //下面是填充数据
	    row1.createCell(0).setCellValue(20071001);
	    row1.createCell(1).setCellValue("金鸽瓜子");
	    //创建一个单元格子
	    Cell cell2=row1.createCell(2);
	    // 填充产品价格
	    cell2.setCellValue(2.45);
	    style = wb.createCellStyle();
	    style.setDataFormat(format.getFormat("#.##"));
	    //设定样式
	    cell2.setCellStyle(style);
	    // 填充产品数量
	    row1.createCell(3).setCellValue(200);
	    /*  
         * 定义显示日期的公共格式  
         * 如:yyyy-MM-dd hh:mm  
         * */
	    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");   
        String newdate = sdf.format(new Date()); 
        // 填充出产日期   
	    row1.createCell(4).setCellValue(newdate);
	    row1.createCell(5).setCellValue("陕西西安");
	    /*  
         * 显示布尔值  
         * */ 
	    row1.createCell(6).setCellValue(true);
	    /*  
         * 合并单元格  
         * 通过writablesheet.mergeCells(int x,int y,int m,int n);来实现的  
         * 表示将first row, last row,first column,last column
         *   
         * */  
	    Row row2 = sheet1.createRow( 2);
	     Cell cell3 = row2.createCell( 0);
	     cell3.setCellValue("合并了三个单元格");
	    sheet1.addMergedRegion(new CellRangeAddress(2,2,0,2));
	    
	    FileOutputStream fileOut = new FileOutputStream("c:\\test.xls");
	    wb.write(fileOut);
	    fileOut.close();


	}

}