導出:
第一步:首先在前臺發送一個請求,請求地址發送爲@requestmapping的value
window.location.href="exportexcel.action"
第二步:後臺接收請求並進行導出的操作(未使用工具類)
// 導出
@RequestMapping("exportexcel")
public void exportexcel(HttpServletResponse response) {
OutputStream oStream = null;
try {
// 創建工作簿
HSSFWorkbook wb = new HSSFWorkbook();
// 創建sheet
HSSFSheet sheet = wb.createSheet("列表");
// 創建表頭
HSSFRow row = sheet.createRow(0);
//創建單元格
HSSFCell cell = row.createCell(0);
cell.setCellValue("用戶名");
HSSFCell cell1 = row.createCell(1);
cell1.setCellValue("密碼");
HSSFCell cell2 = row.createCell(2);
cell2.setCellValue("真實姓名");
HSSFCell cell3 = row.createCell(3);
cell3.setCellValue("手機號");
User user = new User();
List<User> list = userService.getUserList(user);
System.out.println(list);
for(int i=0;i<list.size();i++){
User us = list.get(i);
//創建表頭
HSSFRow lrow = sheet.createRow(i+1);
//創建單元格
HSSFCell lcell = lrow.createCell(0);
lcell.setCellValue(us.getUser_name());
HSSFCell lcell1 = lrow.createCell(1);
lcell1.setCellValue(us.getPassword());
HSSFCell lcell2 = lrow.createCell(2);
lcell2.setCellValue(us.getName());
HSSFCell lcell3 = lrow.createCell(3);
lcell3.setCellValue(us.getPhone());
}
//根據response獲取輸出流
response.setContentType("application/force-download"); // 設置下載類型
response.setHeader("Content-Disposition","attachment;filename=sxlb.xls"); // 設置文件的名稱
oStream = response.getOutputStream(); // 輸出流
//把工作薄寫入到輸出流
wb.write(oStream);
} catch (Exception e) {
// TODO: handle exception
try {
oStream.close();
} catch (IOException e1) {
e1.printStackTrace();
}
e.printStackTrace();
}
}
這樣一來,導出就大功告成了
導入:
第一步:首先在jsp界面寫一個form表單,一個文件標籤(注意form表單一定要設置enctype="multipart/form-data",並且傳送方式爲post)
<form enctype="multipart/form-data" method="post" action="importexcel.action">
<input type="file">
</form>
第二步:提供一個我寫的工具類,已經測試過大家可以放心使用,導入導出都可以使用
public class ExcelUtils {
public static void main(String[] args) throws Exception {
// List<User> list = new ArrayList<User>();
// for (int i=0;i<10;i++) {
// User us = new User();
// us.setName("張三"+i);
// us.setPhone(i+"11111111111");
// SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
// us.setCreate_time(sdf.format(new Date()));
// us.setUser_name(i+"[email protected]");
// list.add(us);
// }
// String columnNames[] = {"姓名","電話","時間","郵箱"};
// String columns[] = {"name","phone","create_time","user_name"};
// exportExcelByList("D:\\wang.xls", list, columnNames, columns, "用戶信息");
String[][] mm = readexcell("D:\\wang.xls",1);
System.out.println(123);
}
/**
* 讀取excel
* @param filepath 文件路徑
* @param startrow 讀取的開始行
* @Result 返回一個二維數組(第一維放的是行,第二維放的是列表)
* @throws Exception
*/
public static String[][] readexcell(String filepath,int startrow) throws Exception{
// 判斷文件是否存在
File file = new File(filepath);
if (!file.exists()) {
throw new IOException("文件" + filepath + "W不存在!");
}
//獲取sheet
Sheet sheet = getSheet(filepath);
String[][] content = getData(startrow, sheet);
return content;
}
/**
* 讀取excel
* @param filepath 文件路徑
* @param startrow 讀取的開始行
* @Result 返回一個二維數組(第一維放的是行,第二維放的是列表)
* @throws Exception
*/
public static String[][] readexcellByInput(InputStream is,String fileName,int startrow) throws Exception{
//文件後綴
String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName.substring(fileName.lastIndexOf("."));
//獲取sheet
Sheet sheet = null;
if (".xls".equals(extension)) {//2003
//獲取工作薄
POIFSFileSystem fs = new POIFSFileSystem(is);
sheet = new HSSFWorkbook(fs).getSheetAt(0);
} else if (".xlsx".equals(extension) || ".xlsm".equals(extension)) {
sheet = new XSSFWorkbook(is).getSheetAt(0);
} else {
throw new IOException("文件(" + fileName + "),無法識別!");
}
//獲取表單數據
String[][] content = getData(startrow, sheet);
return content;
}
/**
* 獲取表單數據
* wangyue
* @param startrow
* @param sheet
* @return
* 2018年4月26日下午2:25:43
*/
private static String[][] getData(int startrow, Sheet sheet) {
// 得到總行數
int rowNum = sheet.getLastRowNum()+1;
// 根據第一行獲取列數
Row row = sheet.getRow(0);
//獲取總列數
int colNum = row.getPhysicalNumberOfCells();
//根據行列創建二維數組
String[][] content = new String[rowNum-startrow][colNum];
String[] cols = null;
//通過循環,給二維數組賦值
for (int i = startrow; i < rowNum; i++) {
row = sheet.getRow(i);
cols = new String[colNum];
for (int j = 0; j < colNum; j++) {
//獲取每個單元格的值
cols[j] = getCellValue(row.getCell(j));
//把單元格的值存入二維數組
content[i - startrow][j] =cols[j];
}
}
return content;
}
/**
* 根據表名獲取第一個sheet
* @param path d:\\1213.xml
* @return 2003-HSSFWorkbook 2007-XSSFWorkbook
* @throws Exception
*/
public static Sheet getSheet(String file) throws Exception {
//文件後綴
String extension = file.lastIndexOf(".") == -1 ? "" : file.substring(file.lastIndexOf("."));
//創建輸入流
InputStream is = new FileInputStream(file);
if (".xls".equals(extension)) {//2003
//獲取工作薄
POIFSFileSystem fs = new POIFSFileSystem(is);
return new HSSFWorkbook(fs).getSheetAt(0);
} else if (".xlsx".equals(extension) || ".xlsm".equals(extension)) {
return new XSSFWorkbook(is).getSheetAt(0);
} else {
throw new IOException("文件(" + file + "),無法識別!");
}
}
/**
* 功能:獲取單元格的值
*/
private static String getCellValue(Cell cell) {
Object result = "";
if (cell != null) {
switch (cell.getCellType()) {
case Cell.CELL_TYPE_STRING:
result = cell.getStringCellValue();
break;
case Cell.CELL_TYPE_NUMERIC:
// 在excel裏,日期也是數字,在此要進行判斷
if(HSSFDateUtil.isCellDateFormatted(cell)){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = cell.getDateCellValue();
result = sdf.format(date);
}else{
DecimalFormat df=new DecimalFormat("#");
result=df.format(cell.getNumericCellValue());
}
break;
case Cell.CELL_TYPE_BOOLEAN:
result = cell.getBooleanCellValue();
break;
case Cell.CELL_TYPE_FORMULA:
result = cell.getCellFormula();
break;
case Cell.CELL_TYPE_ERROR:
result = cell.getErrorCellValue();
break;
case Cell.CELL_TYPE_BLANK:
break;
default:
break;
}
}
return result.toString();
}
/**
* 導出 ---到固定文件目錄
* 根據傳入List數據集合導出Excel表格 生成本地excel
* @param file (輸出流路徑)d:\\123.xml
* @param list 任何對象類型的list(數據庫直接查詢出的)User(id,name,age,sex)
* @param columnNames(表頭名稱)(姓名、性別、年齡)
* @param columns (表頭對應的列名)(name,sex,age)注意順序
* @param sheetName(sheet名稱)
*/
@SuppressWarnings("rawtypes")
public static void exportExcelByList(String file, List list,String[] columnNames, String[] columns, String sheetName) {
OutputStream fos =null;
try {
//獲取輸出流
fos= new FileOutputStream(file);
//創建工作薄HSSFWorkbook
HSSFWorkbook wb = new HSSFWorkbook();
//創建表單sheet
HSSFSheet sheet = wb.createSheet(sheetName);
//創建樣式對象
HSSFCellStyle style = wb.createCellStyle(); // 樣式對象
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
//創建行--表頭
HSSFRow row = sheet.createRow(0);
for (int i = 0; i < columnNames.length; i++) {
//創建列、單元格
HSSFCell cell = row.createCell(i);
cell.setCellValue(columnNames[i]);
cell.setCellStyle(style);
}
//創建數據列
for (int i = 0; i < list.size(); i++) {
Object o = list.get(i);
//創建行--數據
HSSFRow listRow = sheet.createRow(i + 1);
//循環列字段數組
for (int j = 0; j < columns.length; j++) {
//創建列
HSSFCell listCell = listRow.createCell(j);
//根據反射調用方法
Method m = o.getClass().getMethod("get" + upperStr(columns[j]));
String value = (String) m.invoke(o);
if (value != null) {
listCell.setCellValue(value);
listCell.setCellStyle(style);
} else {
listCell.setCellValue("");
listCell.setCellStyle(style);
}
sheet.autoSizeColumn(j+1, true);//自適應,從1開始
}
}
//把工作薄寫入到輸出流
wb.write(fos);
System.out.println("生成excel成功:"+file);
} catch (Exception e) {
e.printStackTrace();
}finally {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 根據傳入List數據集合導出Excel表格 返回頁面選擇保存路徑的excel
* @param response (響應頁面)
* @param list 數據列表
* @param columnNames 表頭
* @param columns 對應列名
* @param sheetName
* @param filename
*/
@SuppressWarnings("rawtypes")
public static void exportExcel(HttpServletResponse response,List list, String[] columnNames, String[] columns,String sheetName, String filename) {
OutputStream fos = null;
try {
//響應輸出流,讓用戶自己選擇保存路徑
response.setCharacterEncoding("UTF-8");
response.reset();//清除緩存
response.setContentType("octets/stream");
response.addHeader("Content-Disposition", "attachment;filename="+ new String((filename).getBytes("UTF-8"), "iso8859-1")+ ".xls");
fos = response.getOutputStream();
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet(sheetName);
HSSFCellStyle style = wb.createCellStyle(); // 樣式對象
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 水平
HSSFRow row = sheet.createRow(0);
for (int i = 0; i < columnNames.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellValue(columnNames[i]);
cell.setCellStyle(style);
}
for (int i = 0; i < list.size(); i++) {
HSSFRow listRow = sheet.createRow(i + 1);
Object o = list.get(i);
for (int j = 0; j < columns.length; j++) {
HSSFCell listCell = listRow.createCell(j);
Method m = o.getClass().getMethod("get" + upperStr(columns[j]));
String value = (String) m.invoke(o);
if (value != null) {
listCell.setCellValue(value + "");
listCell.setCellStyle(style);
} else {
listCell.setCellValue("");
listCell.setCellStyle(style);
}
sheet.autoSizeColumn(j+1, true);//自適應,從1開始
}
}
wb.write(fos);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 把輸入字符串的首字母改成大寫
*
* @param str
* @return
*/
private static String upperStr(String str) {
char[] ch = str.toCharArray();
if (ch[0] >= 'a' && ch[0] <= 'z') {
ch[0] = (char) (ch[0] - 32);
}
return new String(ch);
}
/**
* 海量數據導出 100萬以上
* wangyue
* @param response 直接響應到瀏覽器
* @param list 數據列表
* @param columnNames 表頭數組
* @param columns 和表頭數組對應的字段數組
* @param sheetName sheet表單名稱
* @param filename 工作薄名稱
* 2018年4月26日下午1:53:29
*/
public static void exportBigData(HttpServletResponse response,List list, String[] columnNames, String[] columns,String sheetName, String filename){
OutputStream os = null;
try {
response.setContentType("application/force-download"); // 設置下載類型
response.setHeader("Content-Disposition","attachment;filename=" + filename); // 設置文件的名稱
os = response.getOutputStream(); // 輸出流
SXSSFWorkbook wb = new SXSSFWorkbook(1000);//內存中保留 1000 條數據,以免內存溢出,其餘寫入 硬盤
//獲得該工作區的第一個sheet
Sheet sheet1 = wb.createSheet(sheetName);
int excelRow = 0;
//標題行
Row titleRow = (Row) sheet1.createRow(excelRow++);
for (int i = 0; i < columns.length; i++) {
Cell cell = titleRow.createCell(i);
cell.setCellValue(columns[i]);
}
if (list!= null && list.size() > 0) {
for (int i = 0; i < list.size(); i++) {
//明細行
Row contentRow = (Row) sheet1.createRow(excelRow++);
List<String> reParam = (List<String>) list.get(i);
for (int j = 0; j < reParam.size(); j++) {
Cell cell = contentRow.createCell(j);
cell.setCellValue(reParam.get(j));
}
}
}
wb.write(os);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (os != null) {
os.close();
}
} catch (IOException e) {
e.printStackTrace();
} // 關閉輸出流
}
}
}
第三步:controller層接收請求並進行處理
// 導入
@RequestMapping("importexcel")
@ResponseBody
public Map<String,Object> importexcel(MultipartFile file){
Map<String,Object> map = new HashMap<String, Object>();
try {
//用工具類
String[][] data = ExcelUtils.readexcellByInput(file.getInputStream(), file.getOriginalFilename(), 1);
for(int i=0;i<data.length;i++){
User user = new User();
user.setUser_name(data[i][0]+"02");
user.setPassword(data[i][1]);
user.setName(data[i][2]);
user.setPhone(data[i][3]);
userService.save(user, null);//這是一個添加方法,dao層寫入sql語句即可
}
map.put("success", true);
}catch (Exception e) {
e.printStackTrace();
map.put("success", false);
map.put("errmsg", e.getMessage());
}
return map;
}
這樣一來導入也大功告成了。
希望我的博客能夠幫助到大家,還希望大家多多點評。