JFile的导入xlsx与xls

首先需要有JAVA的一些jar包

下载地址：http://download.csdn.net/detail/qq_35980546/9892511

你要先配置好路由，还有能拿到绝对路径才行

下面直接给源码：

import java.io.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.xmlbeans.impl.piccolo.io.FileFormatException;
import org.apache.poi.ss.usermodel.Sheet;

import com.jfinal.core.Controller;
import com.jfinal.kit.PathKit;

public class ExcelController extends Controller {
private static final String EXTENSION_XLS = "xls";
private static final String EXTENSION_XLSX = "xlsx";

public void Excel() throws FileNotFoundException, FileFormatException{//Excel数据导入
//String Excelion = PathKit.getWebRootPath() + "//upload//"+this.getPara("Excel");//这是找到项目中的路径
String Excelion=this.getPara("Excel"); //找到的Excel的绝对路径
// 检查
preReadCheck(Excelion);
// 获取workbook对象
Workbook workbook = null;

try {
workbook = getWorkbook(Excelion);
Integer ing=0;//长度
Integer lengthing=0;//表头标记
int lastColumnIndex = 0;//列数
Map<String, String> map=new HashMap<String, String>();
Map<String,String> maptable=new HashMap<String, String>();
// 读文件 一个sheet一个sheet地读取
for (int numSheet = 0; numSheet < workbook.getNumberOfSheets(); numSheet++) {
Sheet sheet = workbook.getSheetAt(numSheet);
if (sheet == null) {
break;
}
int firstRowIndex = sheet.getFirstRowNum();
int lastRowIndex = sheet.getLastRowNum();
Row firstRow = sheet.getRow(firstRowIndex);
for (int i = firstRow.getFirstCellNum(); i <= firstRow.getLastCellNum(); i++) {
Cell cell = firstRow.getCell(i);
String cellValue = getCellValue(cell, true);//表头数据
System.out.println("表头数据:"+cellValue);
}
//System.out.println("");

// 读取数据行
for (int rowIndex = firstRowIndex + 1; rowIndex <= lastRowIndex; rowIndex++) {
Row currentRow = sheet.getRow(rowIndex);// 当前行
int firstColumnIndex = currentRow.getFirstCellNum(); // 首列
lastColumnIndex = currentRow.getLastCellNum();// 最后一列
for (int columnIndex = firstColumnIndex; columnIndex <= lastColumnIndex; columnIndex++) {
Cell currentCell = currentRow.getCell(columnIndex);// 当前单元格
String currentCellValue = getCellValue(currentCell, true);// 当前单元格的值
//System.out.print(currentCellValue + "\t");
System.out.println("表头数据:"+currentCellValue);
}
}
}

} catch (Exception e) {
e.printStackTrace();
}

}


private static void preReadCheck(String filePath) throws FileNotFoundException, FileFormatException {
// 常规检查
File file = new File(filePath);
if (!file.exists()) {
throw new FileNotFoundException("传入的文件不存在：" + filePath);
}

if (!(filePath.endsWith(EXTENSION_XLS) || filePath.endsWith(EXTENSION_XLSX))) {
throw new FileFormatException("传入的文件不是excel");
}
}

private static String getCellValue(Cell cell, boolean treatAsStr) {
if (cell == null) {
return "";
}

if (treatAsStr) {
// 虽然excel中设置的都是文本，但是数字文本还被读错，如“1”取成“1.0”
// 加上下面这句，临时把它当做文本来读取
cell.setCellType(Cell.CELL_TYPE_STRING);
}

if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
return String.valueOf(cell.getBooleanCellValue());
} else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
return String.valueOf(cell.getNumericCellValue());
} else {
return String.valueOf(cell.getStringCellValue());
}

}
private static Workbook getWorkbook(String filePath){
Workbook workbook = null;
InputStream is;
try {
is = new FileInputStream(filePath);
if (filePath.endsWith(EXTENSION_XLS)) { //判断Excel为2003还是2007版本
workbook = new HSSFWorkbook(is);
} else if (filePath.endsWith(EXTENSION_XLSX)) {
workbook = new XSSFWorkbook(is);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

return workbook;
}

}

这是上传Excel的两个版本，前提是你能拿到绝对的路径。
这里我可以给你们拿到到绝对路径的一种方法，就是把文件上传到Tomcat服务器中，然后就读取Tomcat中的文件路径，网上有一大把上传的资料。
如果找不到上传到Tomcat服务器中的代码可以加我QQ：1262333765，非诚勿扰啊！