【SSH项目实战】国税协同平台-6.POI导出用户列表

//导出列表
function doExportExcel(){
	window.open("${basePath}tax/user_exportExcel.action");
}

//导出列表
public void exportExcel(){
	try {
		//1.查找用户列表
		userList=userService.findObjects();
		//2.导出
		HttpServletResponse response=ServletActionContext.getResponse();
		//告诉浏览器要弹出的文档类型
		response.setContentType("application/x-execl");
		//告诉浏览器这个文档要作为附件给别人下载(防止浏览器不兼容，文件名要编码)
		response.setHeader("Content-Disposition", "attachment;filename="+new String("用户列表.xls".getBytes(),"ISO-8859-1"));
		//获取输出流
		ServletOutputStream outputStream= response.getOutputStream();
		userService.exportExcel(userList,outputStream);
		if(outputStream !=null){
			outputStream.close();
		}
	
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
}

/导出列表
public void exportExcel(List<User> userList,ServletOutputStream outputStream);

@Override
public void exportExcel(List<User> userList,
		ServletOutputStream outputStream) {
	
	try {
		//1.创建工作簿
		HSSFWorkbook workbook=new HSSFWorkbook();
		//1.1创建合并单元格对象
		CellRangeAddress cellRangeAddress=new CellRangeAddress(0,0,0,4);//起始行号，结束行号，起始列号，结束列号
	
		//1.2、头标题样式
		HSSFCellStyle style1=creatCellStyle(workbook,(short)16);
		
		//1.3、列标题样式
		HSSFCellStyle style2=creatCellStyle(workbook,(short)13);
	
		//2、创建工作表
		HSSFSheet sheet=workbook.createSheet("用户列表");
		//2.1、加载合并单元格对象
		sheet.addMergedRegion(cellRangeAddress);
		//设置默认列宽
		sheet.setDefaultColumnWidth(20);
		
		//3.创建行
		//3.1、创建头标题行；并设置头标题
		HSSFRow row1=sheet.createRow(0);
		HSSFCell cell1=row1.createCell(0);
		//加载单元格样式
		cell1.setCellStyle(style1);
		cell1.setCellValue("用户列表");
		
		//3.2、创建列标题行，并设置列标题
		HSSFRow row2=sheet.createRow(1);
		String []titles={"用户名","账号","所属部门","性别","电子邮箱"};
		for (int i = 0; i < titles.length; i++) {
			HSSFCell cell2=row2.createCell(i);
			//加载单元格样式
			cell2.setCellStyle(style2);
			cell2.setCellValue(titles[i]);
		}
		
		//4、操作单元格，将用户写入Execl
		if(userList!=null){
			for (int j = 0; j < userList.size(); j++) {
				HSSFRow row=sheet.createRow(j+2);
				HSSFCell cell11=row.createCell(0);
				cell11.setCellValue(userList.get(j).getName());
				HSSFCell cell12=row.createCell(1);
				cell12.setCellValue(userList.get(j).getAccount());
				HSSFCell cell13=row.createCell(2);
				cell13.setCellValue(userList.get(j).getDept());
				HSSFCell cell14=row.createCell(3);
				cell14.setCellValue(userList.get(j).isGender()?"男":"女");
				HSSFCell cell15=row.createCell(4);
				cell15.setCellValue(userList.get(j).getEmail());
			}
		}
		//5、输出
		workbook.write(outputStream);
		workbook.close();
	} catch (Exception e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	
}


/**
 * 创建单元格样式
 * @param workbook 工作簿
 * @param fontSize 字体大小
 * @return 单元格样式
 * */
private HSSFCellStyle creatCellStyle(HSSFWorkbook workbook,short fontSize) {
	HSSFCellStyle style=workbook.createCellStyle();
	style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中
	style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中
	//创建字体
	HSSFFont font=workbook.createFont();
	font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//加粗字体
	font.setFontHeightInPoints(fontSize);
	//加载字体
	style.setFont(font);
	
	return style;
}

package cn.edu.hpu.tax.core.util;

import java.util.List;

import javax.servlet.ServletOutputStream;


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.apache.poi.hssf.util.CellRangeAddress;


import cn.edu.hpu.tax.user.entity.User;


public class ExcelUtil {
	/**
	 * 导出用户的所有列表到Execl
	 * @param userList 用户列表
	 * @param outputStream 输出流
	 * */
	public static void exportExcel(List<User> userList,
			ServletOutputStream outputStream) {
		
		try {
			//1.创建工作簿
			HSSFWorkbook workbook=new HSSFWorkbook();
			//1.1创建合并单元格对象
			CellRangeAddress cellRangeAddress=new CellRangeAddress(0,0,0,4);//起始行号，结束行号，起始列号，结束列号
		
			//1.2、头标题样式
			HSSFCellStyle style1=creatCellStyle(workbook,(short)16);
			
			//1.3、列标题样式
			HSSFCellStyle style2=creatCellStyle(workbook,(short)13);
		
			//2、创建工作表
			HSSFSheet sheet=workbook.createSheet("用户列表");
			//2.1、加载合并单元格对象
			sheet.addMergedRegion(cellRangeAddress);
			//设置默认列宽
			sheet.setDefaultColumnWidth(20);
			
			//3.创建行
			//3.1、创建头标题行；并设置头标题
			HSSFRow row1=sheet.createRow(0);
			HSSFCell cell1=row1.createCell(0);
			//加载单元格样式
			cell1.setCellStyle(style1);
			cell1.setCellValue("用户列表");
			
			//3.2、创建列标题行，并设置列标题
			HSSFRow row2=sheet.createRow(1);
			String []titles={"用户名","账号","所属部门","性别","电子邮箱"};
			for (int i = 0; i < titles.length; i++) {
				HSSFCell cell2=row2.createCell(i);
				//加载单元格样式
				cell2.setCellStyle(style2);
				cell2.setCellValue(titles[i]);
			}
			
			//4、操作单元格，将用户写入Execl
			if(userList!=null){
				for (int j = 0; j < userList.size(); j++) {
					HSSFRow row=sheet.createRow(j+2);
					HSSFCell cell11=row.createCell(0);
					cell11.setCellValue(userList.get(j).getName());
					HSSFCell cell12=row.createCell(1);
					cell12.setCellValue(userList.get(j).getAccount());
					HSSFCell cell13=row.createCell(2);
					cell13.setCellValue(userList.get(j).getDept());
					HSSFCell cell14=row.createCell(3);
					cell14.setCellValue(userList.get(j).isGender()?"男":"女");
					HSSFCell cell15=row.createCell(4);
					cell15.setCellValue(userList.get(j).getEmail());
				}
			}
			//5、输出
			workbook.write(outputStream);
			workbook.close();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
	/**
	 * 创建单元格样式
	 * @param workbook 工作簿
	 * @param fontSize 字体大小
	 * @return 单元格样式
	 * */
	private static HSSFCellStyle creatCellStyle(HSSFWorkbook workbook,short fontSize) {
		HSSFCellStyle style=workbook.createCellStyle();
		style.setAlignment(HSSFCellStyle.ALIGN_CENTER);//水平居中
		style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中
		//创建字体
		HSSFFont font=workbook.createFont();
		font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//加粗字体
		font.setFontHeightInPoints(fontSize);
		//加载字体
		style.setFont(font);
		
		return style;
	}
}

@Override
public void exportExcel(List<User> userList,
		ServletOutputStream outputStream) {
	ExcelUtil.exportExcel(userList, outputStream);
}

用户列表导出完成，下一次我们来探讨导入功能。

转载请注明出处：http://blog.csdn.net/acmman/article/details/49382979

【SSH项目实战】国税协同平台-6.POI导出用户列表

原文：http://blog.csdn.net/acmman/article/details/49382979