POI Export 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 {

//The title of the displayed export table
 private String title;

 //The column name of the export table
 private String[] rowName ;

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

 private HttpServletResponse response;

 //Construction method, pass in the data to be exported
 public ExcelExport(String title,String[] rowName,List<Object[]> dataList ,HttpServletResponse response){
 this.dataList = dataList;
 this.rowName = rowName;
 this.title = title;
 this.response=response;
 }

 /**
 * Export data
 * @throws Exception
 */
 public void export() throws Exception{
 //Create workbook object
 HSSFWorkbook workbook = new HSSFWorkbook();
 //Create worksheet
 HSSFSheet sheet = workbook.createSheet(title);
 //Get column header style object
 HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook);
 //cell style object
 HSSFCellStyle style = this.getStyle(workbook);
 //merge cells
 //sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length -1)));
 // define the desired number of columns
 int columnNum = rowName.length;
 // create a row
 HSSFRow rowRowName = sheet.createRow(0);
 // Set the column header to the cell of the sheet
 for(int n=0;n<columnNum;n++){
 //Create the number of cells corresponding to the column header
 HSSFCell cellRowName = rowRowName.createCell(n);
 //Set the data type of the column header cell
 cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING);
 HSSFRichTextString text = new HSSFRichTextString(rowName[n]);
 //Set the value of the column header cell
 cellRowName.setCellValue (text);
 //Set the column header cell style
 cellRowName.setCellStyle(columnTopStyle);
 }
 //Set the queried data to the cell corresponding to the sheet
 for(int i=0;i<dataList.size();i++){
 //traverse each object
 Object[] obj = dataList.get(i);
 //create the required number of rows
 HSSFRow row = sheet.createRow (i+1);
 for(int j=0; j<obj.length; j++){
 //Set the data type
 of the cell 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 ])){
 //Set the value of the cell
 cell.setCellValue(obj[j].toString());
 }
 }
 //Set the cell style
 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);
 }
 }

 /*
 * column header cell style
 */
 public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
 // set font
 HSSFFont font = workbook.createFont();
 // set font size
 font.setFontHeightInPoints(( short)11);
 //font bold
 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
 //Set the font name
 font.setFontName("Courier New");
 //Set the style;
 HSSFCellStyle style = workbook.createCellStyle();
 //Set the bottom border;
 style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
 //Set the bottom border color ;
 style.setBottomBorderColor(HSSFColor.BLACK.index);
 //Set the left border;
 style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
 //Set the left border color;
 style.setLeftBorderColor(HSSFColor.BLACK.index);
 //Set the right border ;
 style.setBorderRight(HSSFCellStyle.BORDER_THIN);
 //Set the right border color;
 style.setRightBorderColor(HSSFColor.BLACK.index);
 //Set top border;
 style.setBorderTop(HSSFCellStyle.BORDER_THIN);
 //Set top border color;
 style.setTopBorderColor(HSSFColor.BLACK.index);
 //Apply in style Set font;
 style.setFont(font);
 //Set automatic line wrapping;
 style.setWrapText(false);
 //Set the horizontal alignment style to center alignment;
 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
 //Set vertical alignment The style is center alignment;
 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
 return style;
 }

 /*
 * Column data information cell style
 */
 public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
 // Set font
 HSSFFont font = workbook.createFont();
 //Set font size
 font.setFontHeightInPoints((short)10);
 //Bold font
 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
 //Set the font name
 font.setFontName("Courier New");
 //Set the style;
 HSSFCellStyle style = workbook.createCellStyle();
 //Set the bottom border;
 style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
 //Set the bottom border color ;
 style.setBottomBorderColor(HSSFColor.BLACK.index);
 //Set the left border;
 style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
 //Set the left border color;
 style.setLeftBorderColor(HSSFColor.BLACK.index);
 //Set the right border;
 style.setBorderRight(HSSFCellStyle.BORDER_THIN);
 //Set the right border color;
 style .setRightBorderColor(HSSFColor.BLACK.index);
 //Set the top border;
 style.setBorderTop(HSSFCellStyle.BORDER_THIN);
 //Set the top border color;
 style.setTopBorderColor(HSSFColor.BLACK.index);
 //Apply settings in the style Font;
 style.setFont(font);
 //Set automatic line wrapping;
 style.setWrapText(false);
 //Set the horizontal alignment style to center alignment;
 style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
 //Set the vertical alignment style to center alignment;
 style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
 return style;
 }

}

//Called place
/**
* export
* @param request
* @ param response
*/
@RequestMapping(value = "/exportcustomerExcel")
public void exportcustomerExcel(HttpServletRequest request,HttpServletResponse response){
 String title = "User Information";
 String[] rowsName = new String[]{"Number","User Account ","nickname","mobile phone","registration date","source","role"};
 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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