JSP查询结果导出（接上一篇）

查询出结果导出，我用的是POI，

将前台的表单传到后台，以LIST的形式传，后台处理list导出为EXCEL代码如下

excel处理类

public class ExcelFileGenerator {

private final int SPLIT_COUNT = 150000; //Excel每个工作簿的行数

private ArrayList fieldName = null; //excel标题数据集

private List fieldData = null; //excel数据内容

private HSSFWorkbook workBook = null;

/**
* 构造器
* @param fieldName 结果集的字段名
* @param data
*/
public ExcelFileGenerator(ArrayList fieldName, List fieldData) {

this.fieldName = fieldName;
this.fieldData = fieldData;
}

/**
* 创建HSSFWorkbook对象
* @return HSSFWorkbook
*/
public HSSFWorkbook createWorkbook() {

BoardbandHisInfo boardbandHisInfo = new BoardbandHisInfo();
workBook = new HSSFWorkbook();
int rows = fieldData.size();
int sheetNum = 0;

if (rows % SPLIT_COUNT == 0) {
sheetNum = rows / SPLIT_COUNT;
} else {
sheetNum = rows / SPLIT_COUNT + 1;
}

for (int i = 1; i <= sheetNum; i++) {
HSSFSheet sheet = workBook.createSheet("Page " + i);
HSSFRow headRow = sheet.createRow((short) 0);
for (int j = 0; j < fieldName.size(); j++) {
HSSFCell cell = headRow.createCell((short) j);
//添加样式
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
//添加样式
//设置所有单元格的宽度
sheet.setColumnWidth((short)j, (short)6000);
//创建样式(使用工作本的对象创建)
HSSFCellStyle cellStyle = workBook.createCellStyle();
//创建字体的对象
HSSFFont font = workBook.createFont();
//将字体加粗
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//设置字体的颜色
short color = HSSFColor.RED.index;
font.setColor(color);
//将新设置的字体属性放置到样式中
cellStyle.setFont(font);
if(fieldName.get(j) != null){
cell.setCellStyle(cellStyle);
cell.setCellValue((String) fieldName.get(j));
}else{
cell.setCellStyle(cellStyle);
cell.setCellValue("-");
}
}

for (int k = 0; k < (rows < SPLIT_COUNT ? rows : SPLIT_COUNT); k++) {
HSSFRow row = sheet.createRow((short) (k + 1));
//将数据内容放入excel单元格
boardbandHisInfo = (BoardbandHisInfo) fieldData.get((i - 1)* SPLIT_COUNT + k);
List rowList = new ArrayList();
rowList.add(boardbandHisInfo.getAccept_city());//地市
rowList.add(boardbandHisInfo.getDealer_name());//受理工作站名称
rowList.add(boardbandHisInfo.getAccept_date());//业务受理时间
rowList.add(boardbandHisInfo.getInnet_name());//接入方式（AD、光纤等）
rowList.add(boardbandHisInfo.getService_id());//业务标识号
rowList.add(boardbandHisInfo.getFirst_name());//客户名称
rowList.add(boardbandHisInfo.getContact_phone());//客户联系电话
rowList.add(boardbandHisInfo.getInstall_address());//安装地址
rowList.add(boardbandHisInfo.getProduct_id());//宽带带宽
rowList.add(boardbandHisInfo.getMonth_fee());//资费价格
rowList.add(boardbandHisInfo.getApply_date());//宽带套餐开始时间
rowList.add(boardbandHisInfo.getInvalid_date());//宽带套餐结束时间
for (int n = 0; n < rowList.size(); n++) {
HSSFCell cell = row.createCell((short) n);
cell.setEncoding(HSSFCell.ENCODING_UTF_16);
if(rowList.get(n) != null){
cell.setCellValue((String) rowList.get(n).toString());
}else{
cell.setCellValue("");
}
}
}
}
return workBook;
}

public void expordExcel(OutputStream os) throws Exception {
workBook = createWorkbook();
workBook.write(os);
os.close();
}

}

导出方法：

public void exportExcel(HttpServletRequest request, HttpServletResponse response) throws Exception{
System.out.println("开始导出到EXCEL");
BoardbandHisInfoMaint boardbandHisInfoMaint = new BoardbandHisInfoMaint();
String accept_start_date = request.getParameter("accept_start_date");
String accept_end_date = request.getParameter("accept_end_date");
String station_kind_str = request.getParameter("station_kind");
int station_kind = Integer.parseInt(station_kind_str);
List fieldData = new ArrayList();
fieldData = boardbandHisInfoMaint.getExportExcelInfo(accept_start_date, accept_end_date, station_kind, request);

ArrayList fieldName=getFieldName(); //excel标题数据集

String excel="myexcel";
//回去输出流
OutputStream out=response.getOutputStream();
//重置输出流
response.reset();
//设置导出Excel报表的导出形式
response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition","attachment;filename="+excel+".xls");
ExcelFileGenerator efg=new ExcelFileGenerator(fieldName, fieldData);
efg.expordExcel(out);
//设置输出形式
System.setOut(new PrintStream(out));
//刷新输出流
out.flush();
//关闭输出流
if(out!=null){
out.close();
}
}