Excel Import (POI)

ImportExcelUtil.java (Excel parsing tool class)

package com.poiexcel.util;  

import java.io.IOException;  
import java.io.InputStream;  
import java.text.DecimalFormat;  
import java.text.SimpleDateFormat;  
import java.util.ArrayList;  
import java.util.List;  

import org.apache.poi.hssf.usermodel.HSSFWorkbook;  
import org.apache.poi.ss.usermodel.Cell;  
import org.apache.poi.ss.usermodel.Row;  
import org.apache.poi.ss.usermodel.Sheet;  
import org.apache.poi.ss.usermodel.Workbook;  
import org.apache.poi.xssf.usermodel.XSSFWorkbook;  


public class ImportExcelUtil {  

    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<List<Object>>对象 
     * @param in,fileName 
     * @return 
     * @throws IOException  
     */  
    public  List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{  
        List<List<Object>> 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;  
        Row row = null;  
        Cell cell = null;  

        list = new ArrayList<List<Object>>();  
        //遍历Excel中所有的sheet  
        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||row.getFirstCellNum()==j){continue;}  

                //遍历所有的列  
                List<Object> li = new ArrayList<Object>();  
                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {  
                    cell = row.getCell(y);  
                    li.add(this.getCellValue(cell));  
                }  
                list.add(li);  
            }  
        }  
        work.close();  
        return list;  
    }  

    /** 
     * 描述：根据文件后缀，自适应上传文件的版本  
     * @param inStr,fileName 
     * @return 
     * @throws Exception 
     */  
    public  Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{  
        Workbook wb = null;  
        String fileType = fileName.substring(fileName.lastIndexOf("."));  
        if(excel2003L.equals(fileType)){  
            wb = new HSSFWorkbook(inStr);  //2003-  
        }else if(excel2007U.equals(fileType)){  
            wb = new XSSFWorkbook(inStr);  //2007+  
        }else{  
            throw new Exception("解析的文件格式有误！");  
        }  
        return wb;  
    }  

    /** 
     * 描述：对表格中数值进行格式化 
     * @param cell 
     * @return 
     */  
    public  Object getCellValue(Cell cell){  
        Object value = null;  
        DecimalFormat df = new DecimalFormat("0");  //格式化number String字符  
        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");  //日期格式化  
        DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字  

        switch (cell.getCellType()) {  
        case Cell.CELL_TYPE_STRING:  
            value = cell.getRichStringCellValue().getString();  
            break;  
        case Cell.CELL_TYPE_NUMERIC:  
            if("General".equals(cell.getCellStyle().getDataFormatString())){  
                value = df.format(cell.getNumericCellValue());  
            }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){  
                value = sdf.format(cell.getDateCellValue());  
            }else{  
                value = df2.format(cell.getNumericCellValue());  
            }  
            break;  
        case Cell.CELL_TYPE_BOOLEAN:  
            value = cell.getBooleanCellValue();  
            break;  
        case Cell.CELL_TYPE_BLANK:  
            value = "";  
            break;  
        default:  
            break;  
        }  
        return value;  
    }  


}  

UploadExcelControl.java (Spring Controller)

package com.poiexcel.control;  

import java.io.InputStream;  
import java.io.PrintWriter;  
import java.util.List;  

import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  

import org.springframework.stereotype.Controller;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;  
import org.springframework.web.bind.annotation.ResponseBody;  
import org.springframework.web.multipart.MultipartFile;  
import org.springframework.web.multipart.MultipartHttpServletRequest;  

import com.poiexcel.util.ImportExcelUtil;  
import com.poiexcel.vo.InfoVo;  

@Controller  
@RequestMapping("/uploadExcel/*")    
public class UploadExcelControl {  

    /**  
     * 描述：通过传统方式form表单提交方式导入excel文件  
     * @param request  
     * @throws Exception  
     */  
    @RequestMapping(value="upload.do",method={RequestMethod.GET,RequestMethod.POST})  
    public  String  uploadExcel(HttpServletRequest request) throws Exception {  
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;    
        System.out.println("通过传统方式form表单提交方式导入excel文件！");  

        InputStream in =null;  
        List<List<Object>> listob = null;  
        MultipartFile file = multipartRequest.getFile("upfile");  
        if(file.isEmpty()){  
            throw new Exception("文件不存在！");  
        }  
        in = file.getInputStream();  
        listob = new ImportExcelUtil().getBankListByExcel(in,file.getOriginalFilename());  
        in.close();  

        //该处可调用service相应方法进行数据保存到数据库中，现只对数据输出  
        for (int i = 0; i < listob.size(); i++) {  
            List<Object> lo = listob.get(i);  
            InfoVo vo = new InfoVo();  
            vo.setCode(String.valueOf(lo.get(0)));  
            vo.setName(String.valueOf(lo.get(1)));  
            vo.setDate(String.valueOf(lo.get(2)));  
            vo.setMoney(String.valueOf(lo.get(3)));  

            System.out.println("打印信息-->机构:"+vo.getCode()+"  名称："+vo.getName()+"   时间："+vo.getDate()+"   资产："+vo.getMoney());  
        }  
        return "result";  
    }  

    /** 
     * 描述：通过 jquery.form.js 插件提供的ajax方式上传文件 
     * @param request 
     * @param response 
     * @throws Exception 
     */  
    @ResponseBody  
    @RequestMapping(value="ajaxUpload.do",method={RequestMethod.GET,RequestMethod.POST})  
    public  void  ajaxUploadExcel(HttpServletRequest request,HttpServletResponse response) throws Exception {  
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;    

        System.out.println("通过 jquery.form.js 提供的ajax方式上传文件！");  

        InputStream in =null;  
        List<List<Object>> listob = null;  
        MultipartFile file = multipartRequest.getFile("upfile");  
        if(file.isEmpty()){  
            throw new Exception("文件不存在！");  
        }  

        in = file.getInputStream();  
        listob = new ImportExcelUtil().getBankListByExcel(in,file.getOriginalFilename());  

        //该处可调用service相应方法进行数据保存到数据库中，现只对数据输出  
        for (int i = 0; i < listob.size(); i++) {  
            List<Object> lo = listob.get(i);  
            InfoVo vo = new InfoVo();  
            vo.setCode(String.valueOf(lo.get(0)));  
            vo.setName(String.valueOf(lo.get(1)));  
            vo.setDate(String.valueOf(lo.get(2)));   
            vo.setMoney(String.valueOf(lo.get(3)));  

            System.out.println("打印信息-->机构:"+vo.getCode()+"  名称："+vo.getName()+"   时间："+vo.getDate()+"   资产："+vo.getMoney());  
        }  

        PrintWriter out = null;  
        response.setCharacterEncoding("utf-8");  //防止ajax接受到的中文信息乱码  
        out = response.getWriter();  
        out.print("文件导入成功！");  
        out.flush();  
        out.close();  
    }  


}  

InfoVo.java (the object that saves the Excel data)

//将Excel每一行数值转换为对象  
public class InfoVo {  

    private String code;  
    private String name;  
    private String date;  
    private String money;  

    public String getCode() {  
        return code;  
    }  
    public void setCode(String code) {  
        this.code = code;  
    }  
    public String getName() {  
        return name;  
    }  
    public void setName(String name) {  
        this.name = name;  
    }  
    public String getDate() {  
        return date;  
    }  
    public void setDate(String date) {  
        this.date = date;  
    }  
    public String getMoney() {  
        return money;  
    }  
    public void setMoney(String money) {  
        this.money = money;  
    }  
}  

main.jsp (front-end code)

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>  
<%  
String path = request.getContextPath();  
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
%>  
<html>  
  <head>  
    <base href="<%=basePath%>">  
    <script type="text/javascript" src="js/jquery-2.1.4.min.js"></script>  
    <script type="text/javascript" src="js/jquery.form.js"></script>   
    <title>My JSP 'index.jsp' starting page</title>  
    <script type="text/javascript">  
            //ajax 方式上传文件操作  
             $(document).ready(function(){  
                $('#btn').click(function(){  
                    if(checkData()){  
                        $('#form1').ajaxSubmit({    
                            url:'uploadExcel/ajaxUpload.do',  
                            dataType: 'text',  
                            success: resutlMsg,  
                            error: errorMsg  
                        });   
                        function resutlMsg(msg){  
                            alert(msg);     
                            $("#upfile").val("");  
                        }  
                        function errorMsg(){   
                            alert("导入excel出错！");      
                        }  
                    }  
                });  
             });  

             //JS校验form表单信息  
             function checkData(){  
                var fileDir = $("#upfile").val();  
                var suffix = fileDir.substr(fileDir.lastIndexOf("."));  
                if("" == fileDir){  
                    alert("选择需要导入的Excel文件！");  
                    return false;  
                }  
                if(".xls" != suffix && ".xlsx" != suffix ){  
                    alert("选择Excel格式的文件导入！");  
                    return false;  
                }  
                return true;  
             }  
    </script>   
  </head>  

  <body>  
  <div>1.通过简单的form表单提交方式，进行文件的上</br> 2.通过jquery.form.js插件提供的form表单一步提交功能 </div></br>  
    <form method="POST"  enctype="multipart/form-data" id="form1" action="uploadExcel/upload.do">  
        <table>  
         <tr>  
            <td>上传文件: </td>  
            <td> <input id="upfile" type="file" name="upfile"></td>  
         </tr>  
        <tr>  
            <td><input type="submit" value="提交" onclick="return checkData()"></td>  
            <td><input type="button" value="ajax方式提交" id="btn" name="btn" ></td>  
         </tr>  
        </table>    
    </form>  

  </body>  
</html>  

web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app version="3.0"   
    xmlns="http://java.sun.com/xml/ns/javaee"   
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd ">  

      <!-- 加载Spring容器监听 -->  
      <listener>      
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
      </listener>  

      <!-- 设置Spring容器加载配置文件路径 -->  
      <context-param>      
          <param-name>contextConfigLocation</param-name>      
          <param-value>WEB-INF/application/applicationContext-*.xml</param-value>  
      </context-param>  

      <!--配置Springmvc核心控制器-->  
      <servlet>            
            <servlet-name>springmvc</servlet-name>           
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
            <load-on-startup>1</load-on-startup>  
      </servlet>      
      <!--为DispatcherServlet建立映射 -->        
      <servlet-mapping>    
            <servlet-name>springmvc</servlet-name>        
            <url-pattern>*.do</url-pattern>      
      </servlet-mapping>   
    <welcome-file-list>  
        <welcome-file>main.jsp</welcome-file>  
    </welcome-file-list>    
</web-app>  

springmvc-servlet.xml (only simple configuration)

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"    
     xmlns:context="http://www.springframework.org/schema/context"  
     xmlns:mvc="http://www.springframework.org/schema/mvc"    
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
     xmlns:tx="http://www.springframework.org/schema/tx"   
     xsi:schemaLocation="  
          http://www.springframework.org/schema/beans       
          http://www.springframework.org/schema/beans/spring-beans-4.1.xsd  
          http://www.springframework.org/schema/context  
          http://www.springframework.org/schema/context/spring-context-4.1.xsd  
          http://www.springframework.org/schema/mvc  
          http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd  
          http://www.springframework.org/schema/tx       
          http://www.springframework.org/schema/tx/spring-tx-4.1.xsd     
          http://www.springframework.org/schema/context       
          http://www.springframework.org/schema/beans/spring-beans-4.1.xsd ">  

     <!-- 启动注解驱动-->    
     <mvc:annotation-driven/>    
     <!-- 启动包扫描功能-->    
     <context:component-scan base-package="com.poiexcel.*" />    

</beans>    

applicationContext-base.xml

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"    
     xmlns:context="http://www.springframework.org/schema/context"  
     xmlns:mvc="http://www.springframework.org/schema/mvc"    
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
     xmlns:tx="http://www.springframework.org/schema/tx"   
     xsi:schemaLocation="  
          http://www.springframework.org/schema/beans       
          http://www.springframework.org/schema/beans/spring-beans-4.1.xsd   
          http://www.springframework.org/schema/context  
          http://www.springframework.org/schema/context/spring-context-4.1.xsd   
          http://www.springframework.org/schema/mvc  
          http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd  
          http://www.springframework.org/schema/tx       
          http://www.springframework.org/schema/tx/spring-tx-4.1.xsd      
          http://www.springframework.org/schema/context       
          http://www.springframework.org/schema/context/spring-context-4.1.xsd ">  

     <!-- 视图解释类 -->    
     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
      <property name="prefix" value="/WEB-INF/jsp/" />  
      <property name="suffix" value=".jsp" />  
     </bean>  

    <!-- SpringMVC上传文件时，需要配置MultipartResolver处理器 -->  
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">  
        <property name="defaultEncoding" value="utf-8" />  
        <!-- 指定所上传文件的总大小不能超过10485760000B。注意maxUploadSize属性的限制不是针对单个文件，而是所有文件的容量之和 -->  
        <property name="maxUploadSize" value="10485760000" />  
        <property name="maxInMemorySize" value="40960" />  
    </bean>  

</beans>