使用POI操作EXCEl

package com.robert.util;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import com.robert.bean.Student;

public class ExcelUtil {
	
	public HSSFWorkbook createExcel(ArrayList<Student> students) {
		
		HSSFWorkbook wb = new HSSFWorkbook();
		// create a new sheet
		HSSFSheet s = wb.createSheet("workbook.xls");
		// declare a row object reference
		HSSFRow r = null;
		// declare a cell object reference
		HSSFCell c = null;
		// create 2 cell styles
		HSSFCellStyle cs = wb.createCellStyle();
		HSSFCellStyle cs2 = wb.createCellStyle();
		HSSFDataFormat df = wb.createDataFormat();

		// create 2 fonts objects
		HSSFFont f = wb.createFont();
		HSSFFont f2 = wb.createFont();

		// Set font 1 to 12 point type, blue and bold
		f.setFontHeightInPoints((short) 12);
		f.setColor(HSSFColor.RED.index);
		f.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

		// Set font 2 to 10 point type, red and bold
		f2.setFontHeightInPoints((short) 10);
		f2.setColor(HSSFColor.RED.index);
		f2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

		// Set cell style and formatting
		cs.setFont(f);
		cs.setDataFormat(df.getFormat("#,##0.0"));

		// Set the other cell style and formatting
		cs2.setBorderBottom(cs2.BORDER_THIN);
		cs2.setDataFormat(HSSFDataFormat.getBuiltinFormat("text"));
		cs2.setFont(f2);

		// Define a few rows
		
		for(short rownum = 0; rownum < students.size(); rownum++) {
			HSSFRow hssf = s.createRow(rownum);
			Student st = students.get(rownum);
			for(int i = 0;i<3;i++){
				HSSFCell c1 = hssf.createCell(1);
				HSSFCell c2 = hssf.createCell(2);
				HSSFCell c3 = hssf.createCell(3);
				
				c1.setCellValue(st.getId());
				c2.setCellValue(st.getName());
				c3.setCellValue(st.getBrithday());
			}
		}

		// Save
		FileOutputStream out;
		try {
			out = new FileOutputStream("E:\\tomcat6\\webapps\\webproject\\temp\\workbook.xls");
			wb.write(out);
			out.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return wb;
	}
}