上传excel文件并将里面的数据放入数据库

 

注意：上传的excel文件的模板是否正确

 jsp页面:
<s:form namespace="user" enctype="multipart/form-data">
  <s:token name="user_excelcreate"/>
    <div class="navigate_header">当前位置:excel导入</div>
      <table class="table_frame" width="100%">
        <thead>
          <tr><th colspan="4">信息上传</th></tr>
        </thead>
        <tr>
          <td><s:file label="上传" theme="simple" name="upload" id="upload"/></td>
          <td><s:submit name="action:user_doExcelSwitch"  value="上传"/></td>
        </tr>
      </table>
      <font color="red">注：请确认上传文件的格式为excel文件，且后缀为.xls</font>
  </s:form>

 

 

 

action:

 public class User implements ServletRequestAware{
 
 private SimpleDateFormat sdf ;
 // 封装单个上传文件域的属性
 private File upload;
 // 封装单个上传文件名的属性
 private String uploadFileName;
 public String doExcelSwitch(){
  List<User> userList = new ArrayList<User>();  
  sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 
  String createtime = sdf.format(new Date()); 
  //读取数据，放入列表
  readFromExcel(UploadUtil.upload(uploadFileName, upload), userList);

 

//以下是判断数据库中是否已经存在此用户，若存在则不导入，若不存在则导入

//判断读取excel有没有遇到异常
  if(getActionErrors().isEmpty()){
   //用户学号number

   String number= request.getParameter("number");

   for (int i = 0; i < userList.size(); i++) {
     userList.get(i).setNumber(number);
    }
   //读取所有用户列表
   List<String> allUserList = userService.selectNumberByParams(params);

//这里需要调用dao层的方法selectNumberByParams（params）查询出所有数据
   //需要变更的用户列表
   List<User> updateList = new ArrayList<User>();
   for (int i = 0; i < userList.size(); i++) {
    //如果数据库存在该用户则为变更用户
    if(allUserList.contains(userList.get(i).getNumber())){
     updateList.add(userList.get(i));
     userList.remove(i);
     i --;
    }
   }
   int flag1 = 0;
   int flag2 = 0;
   if(flag1 == -3 || flag2 == -3){
    addActionError("信息导入失败！请联系管理员");
   }else{
    addActionMessage("信息导入成功！共导入" + userList.size() + "条，更新" + updateList.size() + "条");
   }
  }else{
   addActionError("文件内数据有问题请修正后再上传！");
  }

  return "success";
 }

 

 //处理excel数据
 private void readFromExcel(String path, List<User> userList){
  if(path == null || "".equals(path.trim())){
   addActionError("文件不能为空！");
  }else if(!getUploadFileName().substring(getUploadFileName().lastIndexOf(".")+1).equals("xls")){
   addActionError("请上传excel格式文件！");
  }else{
   InputStream is = null;
   Workbook workbook;
   Sheet sheet;
   try {
    path = path.replace("\\", "/");
    is = new FileInputStream(path);
    try {
     workbook = WorkbookFactory.create(is);
     for (int j = 0; j < workbook.getNumberOfSheets(); j++) {    //这里可以通过设置j的初始值来设定从第几行开始读取
      sheet = workbook.getSheetAt(j);
      int curRowIndex = 0;
      for (Iterator rit = sheet.rowIterator(); rit.hasNext();) {
       curRowIndex++;
       if (curRowIndex < 2) {
        rit.next();
        continue;
       }
       Row row = (Row) rit.next();
       if(row.getCell(4).toString().contains("合计")){
        break;
       }
       //设置user的字段值
       User user = new User();

　   //这里的row.getCell()是获得这一行的第几列的数据，注：列从零开始

　　user.setNumber(row.getCell(0).toString());
       user.setName(row.getCell(1).toString());
       user.setAge(new BigDecimal(row.getCell(2).toString()).intValue());
       String s = row.getCell(3).toString();
       if("男".equals(s.trim())){
        user.setSex("1");
       }else {
        user.setSex("2");
       }
       
       userList.add(user);
      }
     }
     
    } catch (InvalidFormatException e) {
     addActionError("数据类型匹配错误！");
    }
   } catch (IOException e) {
    addActionError("io 异常");
   }
   //关闭流，并删除临时文件
   finally{
    workbook = null;
    sheet = null;
    if(is != null){
     try {
      is.close();
     } catch (IOException e) {
      
     }
     File file = new File(path.replace("\\", "/"));
     file.delete();
    }
   }
  }
  
 }
 public SimpleDateFormat getSdf() {
  return sdf;
 }
 
 public void setSdf(SimpleDateFormat sdf) {
  this.sdf = sdf;
 }

 public File getUpload() {
  return upload;
 }

 public void setUpload(File upload) {
  this.upload = upload;
 }
 
 public String getUploadFileName() {
  return uploadFileName;
 }

 public void setUploadFileName(String uploadFileName) {
  this.uploadFileName = uploadFileName;
 }

 

 

 

UploadUtil:

public class UploadUtil {

 // 上传单个文件
  public static String upload(String uploadFileName, File upload) {
   String fullPathName = "";
   try {

    // 以服务器的文件保存地址和原文件名建立上传文件输出流

    String url = ServletActionContext.getServletContext().getRealPath(
   "\\upload")
   + "\\temp\\";
   String fileName = new SimpleDateFormat("MMddHHmmssSSS")
     .format(new Date())
     + uploadFileName.substring(uploadFileName.lastIndexOf(".") - 0);
   fullPathName = url + fileName;
   
   File file = new File(url);
   if (!file.exists()) {
    file.mkdirs();
   }        
    FileOutputStream fos = new FileOutputStream( fullPathName );

    // 以上传文件建立一个文件上传流

    FileInputStream fis = new FileInputStream( upload );

    // 将上传文件的内容写入服务器

    byte[] buffer = new byte[1024];

    int len = 0;

    while ((len = fis.read(buffer)) > 0) {

     fos.write(buffer, 0, len);

    }

   } catch (Exception e) {

    e.printStackTrace();

   }

   return fullPathName;

  }
}