public class ExportExcel {
/**
* 顯示的導出表的標題
*/
private String title;
/**
* 導出表的列名
*/
private String[] columnName;
/**
* 需要導出的數據集合
*/
private List<Map> dataList = new ArrayList<Map>();
/**
* 輸入流對象
*/
private HttpServletRequest request;
/**
* 輸出流對象
*/
private HttpServletResponse response;
/**
*
* @param title
* @param columnName
* @param dataList
* @param request
* @param response
* @description 構造方法，傳入要導出的數據
*/
public ExportExcel(String title, String[] columnName, List<Map> dataList,HttpServletRequest request,HttpServletResponse response) {
this.dataList = dataList;
this.columnName = columnName;
this.title = title;
this.request = request;
this.response= response;
}
/**
* @param
* @return
* @description 導出數據到excel
*/
public void export() throws Exception {
try {
HSSFWorkbook workbook = new HSSFWorkbook(); // 創建工作簿對象
HSSFSheet sheet = workbook.createSheet(title); // 創建工作表
// 產生表格標題行
HSSFRow rowm = sheet.createRow(0);
HSSFCell cellTiltle = rowm.createCell(0);
//設置標題和單元格樣式
HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook); //獲取列頭樣式對象
HSSFCellStyle style = this.getStyle(workbook); //單元格樣式對象
// 定義所需列數
int columnNum = columnName.length;
HSSFRow rowRowName = sheet.createRow(0); // 在索引2的位置創建行(最頂端的行開始的第二行)
HSSFRow rowRowName1 = sheet.createRow(1);
// 將列頭設置到sheet的單元格中
for (int n = 0; n < columnNum; n++) {
HSSFCell cellRowName;
if(n <5){
cellRowName = rowRowName.createCell(n); //創建列頭對應個數的單元格
if(n == 4){
cellRowName = rowRowName.createCell(n+6);
}
}else{
cellRowName = rowRowName1.createCell(n-2);
}
if(n < 3){
CellRangeAddress region = new CellRangeAddress(0, 1, n, n);
sheet.addMergedRegion(region);
}else if(n == 3){
CellRangeAddress region = new CellRangeAddress(0, 0, n, n+6);
sheet.addMergedRegion(region);
}else if(n == 4){
CellRangeAddress region = new CellRangeAddress(0, 0, n+6, n+12);
sheet.addMergedRegion(region);
}
cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); //設置列頭單元格的數據類型
HSSFRichTextString text = new HSSFRichTextString(columnName[n]);
cellRowName.setCellValue(text); //設置列頭單元格的值
cellRowName.setCellStyle(columnTopStyle); //設置列頭單元格樣式
}
HSSFRow row;
//將查詢出的數據設置到sheet對應的單元格中
for (int i = 0; i < dataList.size(); i++) {
Map<Object,Object> map = dataList.get(i);//遍歷每個對象
row = sheet.createRow(i+2);//創建所需的行數
HSSFCell cell = null; //設置單元格的數據類型
int num = 0;
for (Object value : map.values()) {
cell = row.createCell(num);
Boolean isNum = false;//data是否爲數值型
Boolean isInteger=false;//data是否爲整數
Boolean isPercent=false;//data是否爲百分數
if (value != null || "".equals(value)) {
//判斷data是否爲數值型
isNum = value.toString().matches("^(-?\\d+)(\\.\\d+)?$");
//判斷data是否爲整數（小數部分是否爲0）
isInteger=value.toString().matches("^[-\\+]?[\\d]*$");
//判斷data是否爲百分數（是否包含“%”）
isPercent=value.toString().contains("%");
}
//如果單元格內容是數值類型，涉及到金錢（金額、本、利），則設置cell的類型爲數值型，設置data的類型爲數值類型
if (isNum && !isPercent) {
HSSFDataFormat df = workbook.createDataFormat(); // 此處設置數據格式
if (isInteger) {
style.setDataFormat(df.getBuiltinFormat("#,#0"));//數據格式只顯示整數
}else{
style.setDataFormat(df.getBuiltinFormat("#,##0.00"));//保留兩位小數點
}
// 設置單元格內容爲double類型
cell.setCellValue(Double.parseDouble(value.toString()));
} else {
// 設置單元格內容爲字符型
if(value==null){
value = "";
}
cell.setCellValue(value.toString());
}
cell.setCellStyle(style);
num++;
}
}
//讓列寬隨着導出的列長自動適應
for (int colNum = 0; colNum < columnNum; colNum++) {
int columnWidth = sheet.getColumnWidth(colNum) / 256;
for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) {
HSSFRow currentRow;
//當前行未被使用過
if (sheet.getRow(rowNum) == null) {
currentRow = sheet.createRow(rowNum);
} else {
currentRow = sheet.getRow(rowNum);
}
if (currentRow.getCell(colNum) != null) {
//取得當前的單元格
HSSFCell currentCell = currentRow.getCell(colNum);
//如果當前單元格類型爲字符串
if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) {
int length = currentCell.getStringCellValue().getBytes().length;
if (columnWidth < length) {
//將單元格里面值大小作爲列寬度
columnWidth = length;
}
}
}
}
//再根據不同列單獨做下處理
if (colNum == 0) {
sheet.setColumnWidth(colNum, (columnWidth - 2) * 256);
} else {
sheet.setColumnWidth(colNum, (columnWidth + 4) * 256);
}
}
if (workbook != null) {
OutputStream out1 = null;
try {
String fileName = title+ new SimpleDateFormat("yyyyMMdd").format(new Date()) ;
String headStr = "attachment; filename=\""+ new String( fileName.getBytes( "gb2312" ), "ISO8859-1" )+ ".xls" + "\"";
response.setContentType("APPLICATION/OCTET-STREAM");
response.setHeader("Content-Disposition", headStr);
out1 = response.getOutputStream();
workbook.write(out1);
} catch (IOException e) {
e.printStackTrace();
}finally{
out1.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* @param
* @return
* @description 標題行的單元格樣式
*/
public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
// 設置字體
HSSFFont font = workbook.createFont();
//設置字體大小
font.setFontHeightInPoints((short) 11);
//字體加粗
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//設置字體名字
font.setFontName("Courier New");
//設置樣式;
HSSFCellStyle style = workbook.createCellStyle();
style.setFillForegroundColor(IndexedColors.BLUE.getIndex());
//設置底邊框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//設置底邊框顏色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//設置左邊框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//設置左邊框顏色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//設置右邊框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//設置右邊框顏色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//設置頂邊框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//設置頂邊框顏色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在樣式用應用設置的字體;
style.setFont(font);
//設置自動換行;
style.setWrapText(false);
//設置水平對齊的樣式爲居中對齊;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//設置垂直對齊的樣式爲居中對齊;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
//設置單元格填充色
style.setFillForegroundColor(IndexedColors.PINK.getIndex());
return style;
}
/**
* @param
* @return
* @description 列數據信息單元格樣式
*/
public HSSFCellStyle getStyle(HSSFWorkbook workbook) {
// 設置字體
HSSFFont font = workbook.createFont();
//設置字體大小
//font.setFontHeightInPoints((short)10);
//字體加粗
//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
//設置字體名字
font.setFontName("Courier New");
//設置樣式;
HSSFCellStyle style = workbook.createCellStyle();
//設置底邊框;
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//設置底邊框顏色;
style.setBottomBorderColor(HSSFColor.BLACK.index);
//設置左邊框;
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
//設置左邊框顏色;
style.setLeftBorderColor(HSSFColor.BLACK.index);
//設置右邊框;
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
//設置右邊框顏色;
style.setRightBorderColor(HSSFColor.BLACK.index);
//設置頂邊框;
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
//設置頂邊框顏色;
style.setTopBorderColor(HSSFColor.BLACK.index);
//在樣式用應用設置的字體;
style.setFont(font);
//設置自動換行;
style.setWrapText(false);
//設置水平對齊的樣式爲居中對齊;
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
//設置垂直對齊的樣式爲居中對齊;
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
return style;
}
}
