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SpringMVC实现上传Excel文件并读取至数据库.md

1.添加依赖

<!--文件上传-->
        <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.xmlbeans/xmlbeans -->
        <dependency>
            <groupId>org.apache.xmlbeans</groupId>
            <artifactId>xmlbeans</artifactId>
            <version>2.6.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.17</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>

2.添加WDWUtil.java工具类

用于判断Excel版本

package tk.mybatis.web.util.fileutil;

public class WDWUtil {
    // @描述:是否是2003的excel,返回true是2003
    public static boolean isExcel2003(String filePath)  {
        return filePath.matches("^.+\\.(?i)(xls)$");
    }

    //@描述:是否是2007的excel,返回true是2007
    public static boolean isExcel2007(String filePath)  {
        return filePath.matches("^.+\\.(?i)(xlsx)$");
    }

}

3.创建Read.java文件

用于读取Excel,实体类根据实际情况自己替换

package tk.mybatis.web.util.fileutil;



import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Date;
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;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;
import tk.mybatis.web.model.Message;


public class ReadExcel {
    //总行数
    private int totalRows = 0;
    //总条数
    private int totalCells = 0;
    //错误信息接收器
    private String errorMsg;
    //构造方法
    public ReadExcel(){}
    //获取总行数
    public int getTotalRows()  { return totalRows;}
    //获取总列数
    public int getTotalCells() {  return totalCells;}
    //获取错误信息
    public String getErrorInfo() { return errorMsg; }

    /**
     * 验证EXCEL文件
     * @param filePath
     * @return
     */
    public boolean validateExcel(String filePath){
        if (filePath == null || !(WDWUtil.isExcel2003(filePath) || WDWUtil.isExcel2007(filePath))){
            errorMsg = "文件名不是excel格式";
            return false;
        }
        return true;
    }

    /**
     * 读EXCEL文件,获取客户信息集合
     * @param
     * @return
     */
    public List<Message> getExcelInfo(String fileName, MultipartFile Mfile){

        //把spring文件上传的MultipartFile转换成CommonsMultipartFile类型
        CommonsMultipartFile cf= (CommonsMultipartFile)Mfile; //获取本地存储路径
        File file = new  File("D:\\fileupload");
        //创建一个目录 (它的路径名由当前 File 对象指定,包括任一必须的父路径。)
        if (!file.exists()) file.mkdirs();
        //新建一个文件
        File file1 = new File("D:\\fileupload\\" + new Date().getTime() + ".xlsx");
        //将上传的文件写入新建的文件中
        try {
            cf.getFileItem().write(file1);
        } catch (Exception e) {
            e.printStackTrace();
        }

        //初始化客户信息的集合
        List<Message> customerList=new ArrayList<Message>();
        //初始化输入流
        InputStream is = null;
        try{
            //验证文件名是否合格
            if(!validateExcel(fileName)){
                return null;
            }
            //根据文件名判断文件是2003版本还是2007版本
            boolean isExcel2003 = true;
            if(WDWUtil.isExcel2007(fileName)){
                isExcel2003 = false;
            }
            //根据新建的文件实例化输入流
            is = new FileInputStream(file1);
            //根据excel里面的内容读取客户信息
            customerList = getExcelInfo(is, isExcel2003);
            is.close();
        }catch(Exception e){
            e.printStackTrace();
        } finally{
            if(is !=null)
            {
                try{
                    is.close();
                }catch(IOException e){
                    is = null;
                    e.printStackTrace();
                }
            }
        }
        return customerList;
    }
    /**
     * 根据excel里面的内容读取客户信息
     * @param is 输入流
     * @param isExcel2003 excel是2003还是2007版本
     * @return
     * @throws IOException
     */
    public  List<Message> getExcelInfo(InputStream is,boolean isExcel2003){
        List<Message> customerList=null;
        try{
            /** 根据版本选择创建Workbook的方式 */
            Workbook wb = null;
            //当excel是2003时
            if(isExcel2003){
                wb = new HSSFWorkbook(is);
            }
            else{//当excel是2007时
                wb = new XSSFWorkbook(is);
            }
            //读取Excel里面客户的信息
            customerList=readExcelValue(wb);
        }
        catch (IOException e)  {
            e.printStackTrace();
        }
        return customerList;
    }
    /**
     * 读取Excel里面客户的信息
     * @param wb
     * @return
     */
    private List<Message> readExcelValue(Workbook wb){
        //得到第一个shell
        Sheet sheet=wb.getSheetAt(0);

        //得到Excel的行数
        this.totalRows=sheet.getPhysicalNumberOfRows();

        //得到Excel的列数(前提是有行数)
        if(totalRows>=1 && sheet.getRow(0) != null){
            this.totalCells=sheet.getRow(0).getPhysicalNumberOfCells();
        }

        List<Message> customerList=new ArrayList<Message>();
        Message customer;
        //循环Excel行数,从第二行开始。标题不入库
        for(int r=1;r<totalRows;r++){
            Row row = sheet.getRow(r);
            if (row == null) continue;
            customer = new Message();

            //循环Excel的列
            for(int c = 0; c <=this.totalCells; c++){
                Cell cell = row.getCell(c);
                if (null != cell){
                    if(c==0){//第一列不读
                    }else if(c==1){
                        System.out.println(cell.getStringCellValue());
                        customer.setMsgType(cell.getStringCellValue());//客户名称
                    }else if (c==2){
                        System.out.println(cell.getStringCellValue());
                        customer.setContent(cell.getStringCellValue());//客户名称
                    }
                }
            }
            //添加客户
            customerList.add(customer);
        }
        return customerList;
    }

}

4.创建服务层

数据库层根据实际情况编写

package tk.mybatis.web.service.impl;

import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import tk.mybatis.web.model.Message;
import tk.mybatis.web.util.fileutil.ReadExcel;

import java.util.List;

@Service
public class UploadService {
    //批量导入客户
    public boolean batchImport(String name,MultipartFile file){
        boolean b = false;
        //创建处理EXCEL
        ReadExcel readExcel=new ReadExcel();
        //解析excel,获取客户信息集合。
        List<Message> customerList = readExcel.getExcelInfo(name ,file);
        System.out.println(customerList);
        if(customerList != null){
            b = true;
        }

        //迭代添加客户信息(注:实际上这里也可以直接将customerList集合作为参数,在Mybatis的相应映射文件中使用foreach标签进行批量添加。)
        for(Message customer:customerList){
            System.out.println(customer.toString());
            //Dao层根据实际情况编写
        }
        return b;
    }
}

5.创建控制层

package tk.mybatis.web.controller;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
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.RequestParam;
import org.springframework.web.multipart.MultipartFile;
import tk.mybatis.web.service.impl.UploadService;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Controller
@RequestMapping("addController/")
public class FileUploadController {

    private static Log log = LogFactory.getLog(FileUploadController.class);
    @Autowired
    private UploadService customerService;

    @RequestMapping(value = "batchimport", method = RequestMethod.POST)
    public String batchimport(@RequestParam(value="filename") MultipartFile file,
                              HttpServletRequest request, HttpServletResponse response) throws IOException {
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        log.info("AddController ..batchimport() start");
        //判断文件是否为空
        if(file==null) return null;
        //获取文件名
        String name=file.getOriginalFilename();
        //进一步判断文件是否为空(即判断其大小是否为0或其名称是否为null)
        long size=file.getSize();
        if(name==null || ("").equals(name) && size==0) return null;

        //批量导入。参数:文件名,文件。
        boolean b = customerService.batchImport(name,file);
        if(b){
            String Msg ="impot success!";
            request.getSession().setAttribute("msg",Msg);
        }else{
            String Msg ="import failed!";
            request.getSession().setAttribute("msg",Msg);
        }
        return "addfile";
    }

}

6.前端页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>

<%
    String importMsg="";
    if(request.getSession().getAttribute("msg")!=null){
        importMsg=request.getSession().getAttribute("msg").toString();
    }
    request.getSession().setAttribute("msg", "");
%>
<head>
    <title>批量导入</title>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<body>
<div><font color="bule">批量导入</font></div>
<form action="addController/batchimport" method="post" enctype="multipart/form-data" onsubmit="return check();">
    <div style="margin: 30px;"><input id="excel_file" type="file" name="filename" accept="xlsx" size="80"/>
        <input id="excel_button" type="submit" value="导入Excel"/></div>
    <font id="importMsg" color="red"><%=importMsg%></font><input type="hidden"/>
</form>
</body>
<script type="text/javascript">
    function check() {
        var excel_file = $("#excel_file").val();
        if (excel_file == "" || excel_file.length == 0) {
            alert("请选择文件路径!");
            return false;
        } else {
            return true;
        }
    }

    $(document).ready(function () {
        var msg="";
        if($("#importMsg").text()!=null){
            msg=$("#importMsg").text();
        }
        if(msg!=""){
            alert(msg);
        }
    });
</script>

</html>