Before a shared excel export function, export has, that need to import natural, not much to say, before the code.
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/**
* 获取文件后缀名
* @param path 文件路径
* @return 文件后缀名
*/
public static String getPostfix(String path)
{
if (path == null)
{
return "";
}
if (path.contains("."))
{
return path.substring(path.lastIndexOf(".") + 1, path.length());
}
return "";
}
/**
* 获取Workbook
* @param
* @return Workbook
*/
public static HSSFWorkbook getWorkbook(String fileName) throws Exception
{
HSSFWorkbook wb = null;
// 建立输入流
InputStream input = new FileInputStream(fileName);
// 获取文件后缀名
String filePostFixName = getPostfix(fileName);
// 根据文件格式(2003或者2007)来初始化
/*if (filePostFixName.equals(OFFICE_EXCEL_2010_POSTFIX))
{
wb = new XSSFWorkbook(input);
}
else */if (filePostFixName.equals(OFFICE_EXCEL_2003_POSTFIX))
{
wb = new HSSFWorkbook(input);
}
return wb;
}
/**
* 得到Excel表中的值
*
* @param hssfCell
* Excel中的每一个格子
* @return Excel中每一个格子中的值
*/
private static String getValue(HSSFCell hssfCell,HSSFFormulaEvaluator formulaEvaluator) {
if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
// 返回布尔类型的值
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
//返回时间类型的值
if(HSSFDateUtil.isCellDateFormatted(hssfCell)){
Date date = hssfCell.getDateCellValue();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(date);
}
// 返回数值类型的值
return String.valueOf(hssfCell.getNumericCellValue());
}else if(hssfCell.getCellType() == hssfCell.CELL_TYPE_FORMULA){
//返回表达式类型的值
if(formulaEvaluator.evaluate(hssfCell).getStringValue()==null){
return String.valueOf(formulaEvaluator.evaluate(hssfCell).getNumberValue());
}
return String.valueOf(formulaEvaluator.evaluate(hssfCell).getStringValue());
}else if(hssfCell.getCellType() == hssfCell.CELL_TYPE_ERROR) {
//返回未知类型的值
return String.valueOf(hssfCell.getErrorCellValue());
}else{
// 返回字符串类型的值
return String.valueOf(hssfCell.getStringCellValue());
}
}
/**
* 读取excel文件返回map集合
* @param fileName 文件路径
* @param rowStart 从第几行开始读取
* @param cellNum 每行有多少个单元格
* @return 返回一个list，list里面每个元素都是一个map，而map则为装着每一行数据的键值对，如(0,value),代表第一格的值。
*/
public static List<Map> importExcel(String fileName,Integer rowStart,Integer cellNum){
HSSFWorkbook hssfWorkbook = null;
//存放map的list
List<Map> list = new ArrayList<Map>();
try {
hssfWorkbook = getWorkbook(fileName);
HSSFFormulaEvaluator formulaEvaluator = new HSSFFormulaEvaluator(hssfWorkbook);
// 循环工作表Sheet
for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
if (hssfSheet == null) {
continue;
}
// 循环行Row
for (int rowNum = rowStart; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
HSSFRow hssfRow = hssfSheet.getRow(rowNum);
if (hssfRow == null) {
continue;
}
//按顺序存放数据的map
Map<Integer,String> map=new LinkedHashMap<Integer,String>();
//通过输入有多少个单元格来存放数据
for(int i=0;i<cellNum;i++){
HSSFCell xh = hssfRow.getCell(i);
map.put(i, getValue(xh,formulaEvaluator));
}
list.add(map);
}
}
}catch (Exception e) {
System.out.println("文件没有读到");
e.printStackTrace();
return null;
}
return list;
} ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~··
With the tools, natural and ultimately file upload, strus2 framework.
Because strus2 framework that comes with the package file upload, so only need to set two variables in the action file layer, and set, get on it.
private File[] file; // 附件
private String[] fileFileName; // 附件名称
public String importExcel(){
String root = ServletActionContext.getServletContext().getRealPath("/upload");
InputStream is;
try {
is = new FileInputStream(file[0]);
OutputStream os = new FileOutputStream(new File(root, fileFileName[0]));
byte[] buffer = new byte[500];
while(-1 != (is.read(buffer)))
{
os.write(buffer);
}
os.close();
is.close();
//获取上传的文件的路径
String path = new File(root, fileFileName[0]).toString();
//另外两个参数第一个是从哪一行开始读取，第二个是总共读多少列
//根据excel显示，从第2行开始，每行读33列
List<Map> excelList = ExcelUtil.importExcel(path,1,32);
//数据库操作~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
}catch (Exception e) {
System.out.println("获取上传文件失败");
e.printStackTrace();
}
return null;
}Again springMVC of.
@RequestMapping(value = "uploadExcel")
public String getExcel(HttpServletRequest request){
//创建一个磁盘文件列表工厂
DiskFileItemFactory factory = new DiskFileItemFactory();
//设置缓冲区
factory.setSizeThreshold(1024*1024);
//得到文件的真实路径
String realPath = request.getSession().getServletContext().getRealPath("/").replace("\\","/");
if (!new File(realPath+"temp/").isDirectory()){
new File(realPath+"temp/").mkdir();
}
//设置中转路径
factory.setRepository(new File(realPath+"temp"));
//如不存在此目录，则创建
if (!new File(realPath+"upload/").isDirectory()){
new File(realPath+"upload/").mkdir();
}
if (ServletFileUpload.isMultipartContent(request)){
//创建一个上传文件的对象
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding("utf-8");
upload.setFileSizeMax(1024*1024);
upload.setSizeMax(10*1024*1024);
List<FileItem> fileItems=null;
try {
//调用上传文件的方法
fileItems = upload.parseRequest(request);
//遍历得到的文件
for(FileItem file:fileItems){
//如果这个不是一个正常的filedform，而是一个上传文件的form
if( !file.isFormField()){
String name= file.getName();
file.write(new File(realPath+"upload/"+name));
String fileName=realPath+"upload/"+name;
//调用工具类读取excel
//数据库操作
return "xxx";
}else{
System.out.println("出错了");
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
return null;
}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The front jsp, again a form submitted form data, you're done.
<form id="importToExcel" action="xxxxxxxxxx" method="post" enctype="multipart/form-data">
文件上传：<input type="file" name="file">
<input type="submit" value="提交">
</form>