POI導出excel的簡單demo

目前使用過兩種導出excel的方式，一種是如題所示的使用POI的方式進行數據的導出，這種方式一般只有在處理比較多的數據或者說需要導出的excel表格中有圖片之類的需要特殊處理的文件的時候使用；還有一種方式是直接在HTML文件中加上.xls的后綴，直接導出excel，一般比較適用於數據較少且沒有特殊文件的情況下；再其次就是各種插件，不過適用插件進行導出的時候導出的圖片一般無法展示；

使用POI導出excel：

package com.controller;

import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
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;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.pojo.Person;


@Controller
@RequestMapping("/exportController")
public class ExportController {
       @RequestMapping("/export")
	public void export(HttpServletResponse response){
                //適用List集合造一些數據作為要導出的數據
                List<Person> list = new ArrayList<Person>();
		list.add(new Person("亞索", "男", "800"));
		list.add(new Person("亞索1", "男", "801"));
		list.add(new Person("亞索2", "男", "802"));
                //調用方法創建HSSFWorkbook工作簿對象
		HSSFWorkbook wb = ExportController.export_text(list);
                try {
                        //定義導出文件的名稱，看不懂的同學可以先行了解一下文件下載
			String fileName = new String("personRelation.xls".getBytes("UTF-8"),"ISO-8859-1");
			response.setContentType("application/vnd.ms-excel");
			response.setHeader("Content-Disposition","attachment; filename="+fileName);
			OutputStream os = response.getOutputStream();

                        //將工作薄寫入到輸出流中
			wb.write(os);
			os.close();
		} catch (Exception e) {
			e.getStackTrace();
		}
        }  

        //創建HSSFWorkbook工作薄對象
        public static HSSFWorkbook export_text(List<Person> list){
                 try {
                        //創建工作薄對象
			HSSFWorkbook wb = new HSSFWorkbook();
                        //創建標題行樣式
			HSSFCellStyle headStyle = headStyle(wb);
                        //創建內容行樣式
			HSSFCellStyle contentStyle = contentStyle(wb);
			
                        //創建表
			HSSFSheet sheet_1 =  wb.createSheet("人員信息");
                        //設置表的默認列寬
			sheet_1.setDefaultColumnWidth(30);
			
                        //創建標題行
			HSSFRow headRow = sheet_1.createRow(0);
			HSSFCell head_cell_1 = headRow.createCell(0);           //創建標題行第一列
			head_cell_1.setCellValue("姓名");                        //第一列內容
			head_cell_1.setCellStyle(headStyle);                    //將標題行樣式添加
			
			HSSFCell head_cell_2 = headRow.createCell(1);
			head_cell_2.setCellValue("性別");
			head_cell_2.setCellStyle(headStyle);
			
			HSSFCell head_cell_3 = headRow.createCell(2);
			head_cell_3.setCellValue("年齡");
			head_cell_3.setCellStyle(headStyle);
			
                        //為內容行添加數據和樣式
			for (int i = 1; i <= list.size(); i++) {
				HSSFRow contentRow = sheet_1.createRow(i);
				HSSFCell content_cell_1 = contentRow.createCell(0);
				content_cell_1.setCellValue(list.get(i-1).getName());
				content_cell_1.setCellStyle(contentStyle);
				
				HSSFCell content_cell_2 = contentRow.createCell(1);
				content_cell_2.setCellValue(list.get(i-1).getSex());
				content_cell_2.setCellStyle(contentStyle);
				
				HSSFCell content_cell_3 = contentRow.createCell(2);
				content_cell_3.setCellValue(list.get(i-1).getAge());
				content_cell_3.setCellStyle(contentStyle);
			}
			return wb;
		} catch (Exception e) {
			e.getStackTrace();
		}
		
		return null;
        }


        /**
	 * 創建標題行樣式
	 * @param wb
	 * @return
	 */
	public static HSSFCellStyle headStyle(HSSFWorkbook wb){
                HSSFCellStyle headStyle = wb.createCellStyle();                       //創建樣式對象
		HSSFFont headFont = wb.createFont();                                  //創建字體
		headFont.setFontName("微軟雅黑");
		headFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
		headFont.setColor(HSSFFont.COLOR_RED);
		
		headStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		headStyle.setFont(headFont);
		return headStyle;
        }

        /**
	 * 創建內容行樣式
	 * @param wb
	 * @return
	 */
	public static HSSFCellStyle contentStyle(HSSFWorkbook wb){
                HSSFCellStyle contentStyle = wb.createCellStyle();
		HSSFFont contentFont = wb.createFont();
		contentFont.setFontName("微軟雅黑");
		contentFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
		contentFont.setColor(HSSFFont.COLOR_NORMAL);
		
		contentStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
		contentStyle.setFont(contentFont);
		return contentStyle;
        }

}