spring文件上传示例

上传文件示例：

index.jsp 页面：

index.jsp :
<form id="form1" name="form1" method="post" action="file.do?method=fileUpload" enctype="multipart/form-data">
<input name="file" type="file" size="20" >
</form>

后台action处理：

public ModelAndView fileUpload(HttpServletRequest request,
            HttpServletResponse response) {
        try {
//            //转型为MultipartHttpServletRequest
            MultipartHttpServletRequest mutilrequest = (MultipartHttpServletRequest) request; 
            MultipartFile file = mutilrequest.getFile("file");//获得上传的文件
            
            String path = request.getSession().getServletContext().getRealPath("WEB-INF/upload/");//得到上传服务器的路径
            
            //获得文件名
            String filename = file.getOriginalFilename();
            //获得输入流
            InputStream input = file.getInputStream();
            //写入文件
            byte[] b = new byte[1048576];

            path+="\"+filename;
            
            File ff = new File(path);
            if(ff.exists()){
                
                ff.delete();
            }
            ff.createNewFile();
            
            //文件流写到服务器端
            FileOutputStream os = new FileOutputStream(path);
//            int len = input.read(b);
//            os.write(b,0,len);
            int len;
            while ((len = input.read()) != -1) {
                os.write(len);
            }
            input.close();
            os.close();
            
                        
            //读取excel 联系人数据,
            List list =  ReadExcel.readExcel(path,dxMap);
            for(int i=0;i<list.size();i++){
                Map map = (HashMap)list.get(i);
                                                messAcceptService.insertMessAccepter_map(map);
            }
                        if(ff.exists()){
                
                ff.delete();
            }
            
                                            
        } catch (Exception e) {
            e.printStackTrace();
        }
        return list(request, response);        
    }

 使用POI读取文件excel的方法：

public class ReadExcel {
    /**
     * 读取excel文件内容
     * @param fileName   excel文件名称
     * @param dmap        excel中列名及对应的属性 ，keyCol: 列标题，姓名， key : 列标题对应的属性值，name

     * @return
     * @throws IOException
     */
    public static List readExcel(String fileName,Map dmap) throws IOException {
        InputStream is = new FileInputStream(fileName);
        HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
        List list = new ArrayList();
        Map map = null;  //存放值
        Map cmap = null;
    
        // 循环工作表sheet
        for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
            HSSFSheet sheet = hssfWorkbook.getSheetAt(numSheet);
            if (sheet == null) {
                continue;
            }
            // 循环row
            HSSFRow row0 = sheet.getRow(0);
                
            if(row0==null){
                break;
            }
            
            //初始化列值
            cmap = new HashMap();
            
            //循环获得列名 相对应的索引
            for(int num=0;num<=row0.getLastCellNum();num++){
                HSSFCell  c0=   row0.getCell((short) num);
                String val = getValue(c0); //标题值
                if(!"".equals(val)){
                    Iterator it0 = dmap.entrySet().iterator(); //遍历列索引
                    while(it0.hasNext()){
                        Entry  obj = (Entry) it0.next(); //key  列名
                        //姓名：name
                        String colName = null==obj.getKey()?"":obj.getKey().toString();
                        String keyName = null==obj.getValue()?"":obj.getValue().toString();
                        if(num==0){
                           cmap.put(keyName, new Integer(-1)); //默认值
                        }
                        if(val.indexOf(colName)>-1){
                            cmap.put(keyName, new Integer(num));
                        }
                        
                    }
                }
            }
            for (int rowNum = 1; rowNum <= sheet.getLastRowNum(); rowNum++) {
                HSSFRow row = sheet.getRow(rowNum);
                if (row == null) {
                    continue;
                }
                
                map = new HashMap();
                Iterator it = cmap.entrySet().iterator(); //遍历列索引
                while(it.hasNext()){
                    Entry  obj = (Entry) it.next();
                    Object val = obj.getValue(); //索引
                    Object key = obj.getKey(); //键
                    int col_index = Integer.parseInt(val.toString()); //列名所对应的索引
                    HSSFCell cell00 = row.getCell((short)col_index);
                    map.put(key, getValue(cell00));
                }
                
                list.add(map);
            }
        }

        return list;

    }
｝

注意，其中dMap的值是通spring注入到controller中的，

<bean id="excel_col" class="java.util.HashMap">
           <constructor-arg>
                <map>
                    <entry key="姓名" value="name"/>
                    <entry key="性别" value="sex"/>
                                                    </map>
        </constructor-arg>
    </bean>
<bean id="FileController" class="com.FileController" parent="baseActionController"
        p:fileService-ref="fileService" p:methodNameResolver-ref="methodNameResolver"                  <property name="dMap" ref="excel_col"/>
         <property name="filename" value="name.xls"/>
    </bean>