1.上傳：

public String uploadFile(CommonsMultipartFile file,String uploadPath,String realUploadPath){  
        InputStream is = null;  
        OutputStream os = null;  
        Calendar calendar = Calendar.getInstance();//獲取時間  
        long excelName = calendar.getTime().getTime();  
          
        
 
try {  
            is = file.getInputStream();  
            String des = realUploadPath + "/"+Long.toString(excelName)+file.getOriginalFilename();  
            os = new FileOutputStream(des);  
              
            byte[] buffer = new byte[1024];  
            int len = 0;  
              
            
 
while((len = is.read(buffer))>0){  
                os.write(buffer);  
            }  
              
        } catch (Exception e) {  
            e.printStackTrace();  
        }finally{  
            if(is!=null){  
                try{  
                    is.close();  
                }catch
 
 (Exception e2){  
                    e2.printStackTrace();  
                }  
            }  
              
            if(os!=null){  
                try{  
                    os.close();  
                }catch (Exception e2){  
                    e2.printStackTrace();  
                }  
            }  
        }  
        //返回路徑  
        return uploadPath + "/"+Long.toString(excelName)+file.getOriginalFilename();  
    }  

2.解析：

常用的Excel解析方式有兩種JXL,POI

jxl用起來相對簡單，但只支持Excel2003版本，也就是說jxl無法解析.xlsx的Excel文件，而POI會識別Excel版本進行解析，所以大部分人更傾向於POI

jxl使用時需要在項目中導入jxl.jar包

poi需要導入

poi-3.14-20160307.jar

poi-ooxml-3.14-20160307.jar

poi-ooxml-schemas-3.14-20160307.jar

commons-io-1.4.jar

commons-fileupload-1.2.1.jar

2.1 JXL解析代碼：

    public String readExcel(CommonsMultipartFile file,HttpServletRequest request)throws IOException, WriteException{  
              
            StringBuffer sb = new StringBuffer();//將讀取的內容存入StringBUffer中  
            try {  
                Workbook book = Workbook.getWorkbook(file.getInputStream());  
                try{  
                    Sheet sheet = book.getSheet(0);  
                    for(int i = 0 ; i < 3 ; i++){//i表示行數  
                        for(int j = 0 ; j < 4 ; j++){//j表示列數  
                            sb.append(sheet.getCell(j, i).getContents()+"\t");  
                        }  
                        sb.append("\n");  
                    }  
                    System.out.println(sb);  
                }finally{  
                    if(book != null){  
                        book.close();  
                    }  
                }  
            } catch (BiffException e) {  
                System.err.println(e+"");  
            } catch (IOException e) {  
                System.err.println(e+"文件讀取錯誤");  
            }  
            return "";  
        }  

2.2 POI解析代碼：

 private POIFSFileSystem fs;  
   private HSSFWorkbook wb;   
   private HSSFSheet sheet;   
   private HSSFRow row;  
   /*讀取標題excel第一行內容*/  
public String[] readExcelTitle(InputStream is) {  
       try {  
           fs = new POIFSFileSystem(is);  
           wb = new HSSFWorkbook(fs);  
       } catch (IOException e) {  
           e.printStackTrace();  
       }  
       sheet = wb.getSheetAt(0);  
       row = sheet.getRow(0);  
       // 標題總列數  
       int colNum = row.getPhysicalNumberOfCells();  
       System.out.println("colNum:" + colNum);  
       String[] title = new String[colNum];  
       for (int i = 0; i < colNum; i++) {  
           //title[i] = getStringCellValue(row.getCell((short) i));  
           title[i] = getCellFormatValue(row.getCell((short) i));  
       }  
       return title;  
   }  
/*讀取內容*/  
 public void readExcelContent(InputStream is) {  
       Map<Integer, ModelCourse> content = new HashMap<Integer, ModelCourse>();  
       ModelCourse model=new ModelCourse();  
       try {  
           fs = new POIFSFileSystem(is);  
           wb = new HSSFWorkbook(fs);  
       } catch (IOException e) {  
           e.printStackTrace();  
       }  
       sheet = wb.getSheetAt(0);  
       // 得到總行數  
       int rowNum = sheet.getLastRowNum();  
       row = sheet.getRow(0);  
       int colNum = row.getPhysicalNumberOfCells();  
         
       // 正文內容從第二行開始,第一行為表頭的標題  
       for (int i = 1; i <=rowNum; i++) {  
           row = sheet.getRow(i);  
           int j = 0;  
            
            
           while (j < colNum) {  
                
            if(j==1){  
                model.setCourse_id(getCellFormatValue(row.getCell((short) j)));  
            }  
            else if(j==2){  
                model.setCourse_name(getCellFormatValue(row.getCell((short) j)));  
            }  
            else if(j==3){  
                model.setCourse_time(getCellFormatValue(row.getCell((short) j)));  
            }  
            else if(j==4){  
                model.setCourse_place(getCellFormatValue(row.getCell((short) j)));  
            }  
               j++;  
                
           }  
           content.put(i, model);  
           addCourse(model);             
       }     
   }  

Java上傳Excel並解析