SSM实现Excel的导入导出功能

需要的jar包

    
		 org.apache.poi
		 poi
		 3.14
	 
	 
		 org.apache.poi
		 poi-ooxml-schemas
		 3.14
	 
	 
		 org.apache.poi
		 poi-ooxml
		 3.14
	 
	 
		 org.apache.httpcomponents
		 httpclient
		 4.5.2
	 

工具类

public class ExcelUtil {

    private final static String excel2003L =".xls";    //2003- 版本的excel
    private final static String excel2007U =".xlsx";   //2007+ 版本的excel

    /**
     * 描述：获取IO流中的数据，组装成List>对象
     * @param in,fileName
     * @return
     * @throws
     */
    public  List> getBankListByExcel(InputStream in,String fileName) throws Exception{
        List> list = null;

        //创建Excel工作薄
        Workbook work = this.getWorkbook(in,fileName);
        if(null == work){
            throw new Exception("创建Excel工作薄为空！");
        }
        Sheet sheet = null;  //页数
        Row row = null;  //行数
        Cell cell = null;  //列数

        list = new ArrayList>();
        //遍历Excel中所有的sheet
        // 将最大的列数记录下来
        int lastCellNum = 0;
        for (int i = 0; i < work.getNumberOfSheets(); i++) {
            sheet = work.getSheetAt(i);
            if(sheet==null){continue;}

            //遍历当前sheet中的所有行
            for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
                row = sheet.getRow(j);
                if(row==null){continue;}

                //遍历所有的列
                List