第一篇关于 java excel 开发

import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

import javaservlets.common.util.SimpleServlet;
import javaservlets.common.util.systemBaseServlet;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
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;

public class ExcelTest extends HttpServlet{
 
	protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
		
		HSSFWorkbook workbook = new HSSFWorkbook(); 
		HSSFSheet sheet1 = workbook.createSheet("sheet1");
		@SuppressWarnings("unused")
		HSSFSheet sheet2 = workbook.createSheet("sheet2");
		// 創建行
		HSSFRow row1 = sheet1.createRow(1);
		HSSFRow row2 = sheet1.createRow(2);
		HSSFRow row3 = sheet1.createRow(3);
		HSSFRow row4 = sheet1.createRow(4);
		HSSFRow row5 = sheet1.createRow(5);
		//單元格
		HSSFCell cell1_1=row1.createCell(0),
		cell1_2 = row1.createCell(1),cell1_3 = row1.createCell(2)
		,cell1_4 = row1.createCell(3),cell1_5 = row1.createCell(4)
		,cell1_6 = row1.createCell(5),cell1_7 = row1.createCell(6);
		
		HSSFCell cell2_2 = row2.createCell(1),cell2_3 = row2.createCell(2)
		,cell2_4 = row2.createCell(3),cell2_5 = row2.createCell(4)
		,cell2_6= row2.createCell(5),cell2_7 = row2.createCell(6);
		
		HSSFCell cell3_2 = row3.createCell(1),cell3_3 = row3.createCell(2)
		,cell3_4 = row3.createCell(3),cell3_5 = row3.createCell(4)
		,cell3_6= row3.createCell(5),cell3_7 = row3.createCell(6);
		
		HSSFCell cell4_3 = row4.createCell(2);
		HSSFCell cell5_3 = row5.createCell(2);
	
		cell1_2.setCellValue("姓名");
		cell1_3.setCellValue("年齡");
		cell1_4.setCellValue("入職時間");
		cell1_5.setCellValue("聯繫電話");
		sheet1.setColumnWidth(3, 250*20); //設置列的寬度
		sheet1.setColumnWidth(4, 250*20);
		cell1_6.setCellValue("Email");
		cell1_7.setCellValue("address");
		
		//创建excel 超链接
		//cell1_1.setCellType(HSSFCell.CELL_TYPE_FORMULA);
		//cell1_1.setCellFormula("HYPERLINK(\"[workbook.xls]'sheet2'!A1\",\"sheet2\")");
		
		cell2_2.setCellValue("王舒婷");
		cell2_3.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
		cell2_3.setCellValue(20);
		cell2_4.setCellValue("2011/05/16");
		cell2_5.setCellValue("15012995131");
		cell2_6.setCellValue("wst5921@163.com");
		cell2_7.setCellValue("山東菏澤");
		
		
		cell3_2.setCellValue("王秀娜");
		cell3_3.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
		cell3_3.setCellValue(18);
		cell3_4.setCellValue("2011/05/16");
		cell3_5.setCellValue("121212");
		cell3_6.setCellValue("222@163.com");
		cell3_7.setCellValue("山東菏澤");
		cell4_3.setCellType(HSSFCell.CELL_TYPE_FORMULA);
		cell4_3.setCellType(HSSFCell.CELL_TYPE_NUMERIC);
		cell4_3.setCellValue(22);
		cell5_3.setCellType(HSSFCell.CELL_TYPE_FORMULA);
		cell5_3.setCellFormula("SUM("+cell2_3+","+cell4_3+")/2"); //求平均年龄
		//創建excel 超鏈接 
		
		String file = "D://workbook.xls";
		
		/*
		 * 設置title字段样式
		 * 
		 * */
		Map<String, HSSFCellStyle> styles = new HashMap<String, HSSFCellStyle>();
		HSSFCellStyle cell_header_title = workbook.createCellStyle();
		HSSFFont font_header_title = workbook.createFont();
		font_header_title.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		font_header_title.setFontHeight((short)(12*20)); //設置字體大小
		font_header_title.setFontName("Times New Roman");
		cell_header_title.setFont(font_header_title);
		cell_header_title.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		cell_header_title.setWrapText(false);
		styles.put("cell_header_title", cell_header_title);
		
		cell1_2.setCellStyle(styles.get("cell_header_title"));
		cell1_3.setCellStyle(styles.get("cell_header_title"));
		cell1_4.setCellStyle(styles.get("cell_header_title"));
		cell1_5.setCellStyle(styles.get("cell_header_title"));
		cell1_6.setCellStyle(styles.get("cell_header_title"));
		cell1_7.setCellStyle(styles.get("cell_header_title"));
		
		getResultSet();
		
		try {
			FileOutputStream out = new FileOutputStream(file);
			workbook.write(out);
			out.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	protected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {
		this.doGet(req, resp);
	}
	
	public void getResultSet(){
		ResultSet  rs=null;
		Connection conn=null;
		PreparedStatement statement=null;
		String SQL="select * from [email].[dbo].Country";
		try {
			conn = SimpleServlet.eliteDWHCP.getConnection();
			statement =conn.prepareStatement(SQL);
			rs = statement.executeQuery();
			System.out.println(rs.getFetchSize());
			while(rs.next()){
				System.out.println("0--->"+rs.getString("countryCode"));
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			if(statement!=null){
				try {
					statement.close();
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			if(conn!=null){
				SimpleServlet.eliteDWHCP.free(conn);
			}
		}
	}
}