POI 导出Excel

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.HSSFRichTextString;
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;

/**
* 导出Excel公共类
* Title:ExportExcel 
* Description: 
* Company: 
* @author David
* @date May 31, 2016 9:49:50 AM
*/
public class ExcelExport {

//显示的导出表的标题
 private String title;

 //导出表的列名
 private String[] rowName ;

 private List<Object[]> dataList = new ArrayList<Object[]>();

 private HttpServletResponse response;

 //构造方法，传入要导出的数据
 public ExcelExport(String title,String[] rowName,List<Object[]> dataList,HttpServletResponse response){
 this.dataList = dataList;
 this.rowName = rowName;
 this.title = title;
 this.response=response;
 }

 /**
 * 导出数据
 * @throws Exception
 */
 public void export() throws Exception{
 //创建工作簿对象
 HSSFWorkbook workbook = new HSSFWorkbook();
 //创建工作表
 HSSFSheet sheet = workbook.createSheet(title);
 //获取列头样式对象
 HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);
 //单元格样式对象
 HSSFCellStyle style = this.getStyle(workbook);
 //合并单元格
 //sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length-1)));
 // 定义所需列数
 int columnNum = rowName.length;
 // 创建行
 HSSFRow rowRowName = sheet.createRow(0);
 // 将列头设置到sheet的单元格中
 for(int n=0;n<columnNum;n++){
 //创建列头对应个数的单元格
 HSSFCell cellRowName = rowRowName.createCell(n);
 //设置列头单元格的数据类型
 cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);
 HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
 //设置列头单元格的值
 cellRowName.setCellValue(text);
 //设置列头单元格样式
 cellRowName.setCellStyle(columnTopStyle);
 }
 //将查询出的数据设置到sheet对应的单元格中
 for(int i=0;i<dataList.size();i++){
 //遍历每个对象
 Object[] obj = dataList.get(i);
 //创建所需的行数
 HSSFRow row = sheet.createRow(i+1);
 for(int j=0; j<obj.length; j++){
 //设置单元格的数据类型
 HSSFCell cell = null;
 if(j == 0){
 cell = row.createCell(j,HSSFCell.CELL_TYPE_NUMERIC);
 cell.setCellValue(i+1);
 }else{
 cell = row.createCell(j,HSSFCell.CELL_TYPE_STRING);
 if(null!=obj[j]&&!"".equals(obj[j])){
 //设置单元格的值
 cell.setCellValue(obj[j].toString());
 }
 }
 //设置单元格样式
 cell.setCellStyle(style);
 }
 }
 for (int colNum = 0; colNum < columnNum; colNum++) {
 sheet.setColumnWidth(colNum, 5000);
 }
 if(workbook !=null){
 String fileName = "Excel-" + String.valueOf(System.currentTimeMillis()).substring(4, 13) + ".xls";
 response.setHeader("Content-disposition", "attachment; filename=" + fileName);
 response.setContentType("application/vnd.ms-excel;charset=utf-8");
 OutputStream out = response.getOutputStream();
 workbook.write(out);
 }
 }

 /*
 * 列头单元格样式
 */
 public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
 // 设置字体
 HSSFFont font = workbook.createFont();
 //设置字体大小
 font.setFontHeightInPoints((short)11);
 //字体加粗
 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
 //设置字体名字
 font.setFontName("Courier New");
 //设置样式;
 HSSFCellStyle style = workbook.createCellStyle();
 //设置底边框;
 style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
 //设置底边框颜色;
 style.setBottomBorderColor(HSSFColor.BLACK.index);
 //设置左边框;
 style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
 //设置左边框颜色;
 style.setLeftBorderColor(HSSFColor.BLACK.index);
 //设置右边框;
 style.setBorderRight(HSSFCellStyle.BORDER_THIN);
 //设置右边框颜色;
 style.setRightBorderColor(HSSFColor.BLACK.index);
 //设置顶边框;
 style.setBorderTop(HSSFCellStyle.BORDER_THIN);
 //设置顶边框颜色;
 style.setTopBorderColor(HSSFColor.BLACK.index);
 //在样式用应用设置的字体;
 style.setFont(font);
 //设置自动换行;
 style.setWrapText(false);
 //设置水平对齐的样式为居中对齐;
 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
 //设置垂直对齐的样式为居中对齐;
 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
 return style;
 }

 /*
 * 列数据信息单元格样式
 */
 public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
 // 设置字体
 HSSFFont font = workbook.createFont();
 //设置字体大小
 font.setFontHeightInPoints((short)10);
 //字体加粗
 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
 //设置字体名字
 font.setFontName("Courier New");
 //设置样式;
 HSSFCellStyle style = workbook.createCellStyle();
 //设置底边框;
 style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
 //设置底边框颜色;
 style.setBottomBorderColor(HSSFColor.BLACK.index);
 //设置左边框;
 style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
 //设置左边框颜色;
 style.setLeftBorderColor(HSSFColor.BLACK.index);
 //设置右边框;
 style.setBorderRight(HSSFCellStyle.BORDER_THIN);
 //设置右边框颜色;
 style.setRightBorderColor(HSSFColor.BLACK.index);
 //设置顶边框;
 style.setBorderTop(HSSFCellStyle.BORDER_THIN);
 //设置顶边框颜色;
 style.setTopBorderColor(HSSFColor.BLACK.index);
 //在样式用应用设置的字体;
 style.setFont(font);
 //设置自动换行;
 style.setWrapText(false);
 //设置水平对齐的样式为居中对齐;
 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
 //设置垂直对齐的样式为居中对齐;
 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
 return style;
 }

}

//调用的地方
/**
* 导出
* @param request
* @param response
*/
@RequestMapping(value = "/exportcustomerExcel")
public void exportcustomerExcel(HttpServletRequest request,HttpServletResponse response){
 String title = "用户信息";
 String[] rowsName = new String[]{"序号","用户账号","昵称","手机","注册日期","来源","角色"};
 List<Object[]> dataList = new ArrayList<Object[]>();
 try{
 UserCondition condition=UserCondition.convertCondition(request,"c.CreateTime");
 List<Customer> customerList=customerService.findAllCustomer(condition);
 int i=0;
 for (Customer customer:customerList) {
 String[] obj = new String[rowsName.length];
 obj[0] = i+"";
 obj[1] = customer.getLoginName();
 obj[2] = customer.getNikeName();
 obj[3] = customer.getMobile();
 obj[4] = customer.getRegTimeStr();
 obj[5] = customer.getRegFrom();
 obj[6] = customer.getGroupName();
 dataList.add(obj);
 i++;
 }
 ExcelExport viewExcel = new ExcelExport(title,rowsName,dataList,response);
 viewExcel.export();
 }catch(Exception ce){
ce.printStackTrace();
log.error("export customer to Excel error",ce);
 }
}

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