我能够从下面的代码中读取excel文件数据，但是我无法获得如何获取excel数据以便在读取excel文件后存储在POJO类中的逻辑。 简而言之：我对如何将这些读取的Excel数据发送到我的模型类以存储在我的数据库表中感到困惑？
以下代码在Eclipse控制台中正确打印excel行：
..............
..............
public String execute()
{
try
{
String filePath=servletRequest.getSession().getServletContext().getRealPath("/");
File fileToCreate= new File(filePath,this.excelDataFileName);
FileUtils.copyFile(this.excelData, fileToCreate);
UploadExcel obj=new UploadExcel();
obj.readExcel(excelData.getAbsolutePath());
}
catch(Exception e){
e.printStackTrace();
addActionError(e.getMessage());
return INPUT;
}
return SUCCESS;
}
/*
*Method to read the each sheet ,row & column of the excel sheet of the uploaded xls file
*/
public void readExcel(String filePath)
{
try
{
FileInputStream file=new FileInputStream(new File(filePath));
//Getting the instance for XLS file
HSSFWorkbook workbook=new HSSFWorkbook(file);
//Get First sheet from the workbook
HSSFSheet sheet=workbook.getSheetAt(0);
ArrayList myList = new ArrayList();
//Iterate start from the first sheet of the uploaded excel file
Iterator<Row> rowIterator = sheet.iterator();
while(rowIterator.hasNext())
{
Row row=rowIterator.next();
if(row.getRowNum()==0)
{
continue;//skip to read the first row of file
}
//For each row, iterate through each coulumns
Iterator<Cell> cellIterator=row.cellIterator();
while(cellIterator.hasNext())
{
Cell cell=cellIterator.next();
if(cell.getColumnIndex()==0)
{
continue;
}
switch(cell.getCellType())
{
case Cell.CELL_TYPE_BOOLEAN:
System.out.print(cell.getBooleanCellValue() + "\t\t");
// myList.add(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_NUMERIC:
System.out.print(cell.getNumericCellValue()+ "\t\t");
// myList.add(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING:
System.out.print(cell.getStringCellValue()+ "\t\t");
// myList.add(cell.getStringCellValue());
break;
}
}
System.out.println("");
}
file.close();
FileOutputStream out=
new FileOutputStream(new File(filePath));
workbook.write(out);
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
在控制台输出中：
TEXTit 6695 PROSPECT RD Nova Scotia B3z 3t1
row2sdfsda 61695 P sfsdfdsf 23B3z 3t1
我的想法是，
我必须逐行获取行，我将把这个行数据添加到我的POJO类对象并将其发送到dao，最后使用saveOrupdate(tableobj)的hibernate方法将数据保存到我的db表中。
但我无法思考，我怎样才能将这些数据添加到我的Pojo类中？
希望有人可以帮助我。
答案 0 :(得分：1)
您可以将DAO的引用注入/传递给UploadExcel类。然后在readExcel（）方法中，您可以创建新的ENTITY并用值填充它。
Entity entity = new Entity();
while(cellIterator.hasNext())
{
Cell cell=cellIterator.next();
if(cell.getColumnIndex()==0)
{
continue;
}
switch(cell.getCellType())
{
case Cell.CELL_TYPE_BOOLEAN:
entity.setBooleanValue(cell.getBooleanValue);
break;
...
}
}
最后，您通过DAO插入/ createOrUpdate您的实体。
dao.insertOrUpdate(entity);
*编辑* 用于解释评论的代码
实体只是自定义实体的一个示例，它对从excel读取的数据进行建模。 例如，如果您的Excel包含有关客户的数据，那么您可以创建 客户实体。
public class Customer {
private String name;
private String surname;
private Integer age;
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
// + getters and setters for other fields
}
然后将填充了excel数据的实体发送到您的DAO（管理客户表），并将给定的实体插入数据库。
* EDIT2 *
删除“dao.saveOrUpdateCompany（company）;”来自以下代码：
public String execute()
{
try
{
String filePath=servletRequest.getSession().getServletContext().getRealPath("/");
File fileToCreate= new File(filePath,this.excelDataFileName);
FileUtils.copyFile(this.excelData, fileToCreate);
UploadExcel obj=new UploadExcel();
obj.readExcel(excelData.getAbsolutePath());
}
catch(Exception e){
e.printStackTrace();
addActionError(e.getMessage());
return INPUT;
}
return SUCCESS;
}
你想要一个新的实体PER ROW，现在你只需要在类的开头创建一个实体
阅读代码
后面的评论 public void readExcel(String filePath)
{
try
{
List sheetData = new ArrayList();
FileInputStream file=new FileInputStream(new File(filePath));
//Getting the instance for XLS file
HSSFWorkbook workbook=new HSSFWorkbook(file);
//Get First sheet from the workbook
HSSFSheet sheet=workbook.getSheetAt(0);
//Iterate start from the first sheet of the uploaded excel file
Iterator<Row> rowIterator = sheet.iterator();
while (rowIterator.hasNext()) {
Row row = (Row) rowIterator.next();
// CHANGE
Company company = new Company();
company.setName(getCellValue(row.getCell((short)1)));
// HERE YOU CAN SAVE COMPANY
dao.saveOrUpdateCompany(company);
// OR ADD COMPANY TO LIST
// List<Company> companies = new ArrayList<Company>();
// Declare just one list for entire class not per row
// In this case you call custom made DAO method which batch save
// all company entities in list but you call this custom method
// at the end of excel processing (your original dao code position).
// Try it without list first
list.add(company);
}
System.out.println("Seet data size-"+sheetData.size());
file.close();
FileOutputStream out=
new FileOutputStream(new File(filePath));
workbook.write(out);
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
* EDIT3 *
我认为这最终应该有效
try{
session=HibernateUtil.getSessionFactory().openSession();
transaction=session.beginTransaction();
for(int i=0;i<companies.size();i++)
{
// THIS IS BAD
//Company com=new Company();
//You need this
Company com = companies.get(i);
session.saveOrUpdate(com);
}
transaction.commit();
status++;
}
答案 1 :(得分：0)
Iterator iterator = workSheet.rowIterator();
while (iterator.hasNext()) {
Row row = (Row) iterator.next();
// check each cell for null and by using getCellValue() method. and inject the value in to user defined pojo.
}
private String getCellValue(Cell cell) {
if (cell == null) {
return null;
}
if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
return cell.getStringCellValue();
} else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
return cell.getNumericCellValue() + "";
} else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
return cell.getBooleanCellValue() + "";
}else if(cell.getCellType() == Cell.CELL_TYPE_BLANK){
return cell.getStringCellValue();
}else if(cell.getCellType() == Cell.CELL_TYPE_ERROR){
return cell.getErrorCellValue() + "";
}
else {
return null;
}
}