springMVC(5)---导入excel文件数据到数据库
上一篇文章写了从数据库导出数据到excel文件，这篇文章悄悄相反，写的是导入excel文件数据到数据库。上一篇链接：springMVC(4)---生成excel文件并导出
直接进入步骤讲解：
第一步、导入jar包
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>
第二步，创建Model对象
我没有把数据放到数据库中，而是导入到实体中，然后在后台打印
public class Family {
//家庭编号
private String jtbh;
//姓名
private String xm;
//行业
private String hy;
//备注
private String bz;
/*
* 提供set和get，toString方法
*/
}
第三步.导入excel界面 leadingexcel.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
<head>
<script type="text/javascript" src="../js/jquery-1.7.1.js"></script>
<script type="text/javascript" src="../js/jquery.form.js"></script>
<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/ajax',
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> <form method="POST" enctype="multipart/form-data" id="form1" action="uploadExcel/form"> <label>上传文件: </label>
<input id="upfile" type="file" name="upfile"><br> <br> <input type="submit" value="表单提交" onclick="return checkData()">
<input type="button" value="ajax提交" id="btn" name="btn" > </form>
</body>
</html>
先讲下，我这src引用路径的时候发现，怎么也引用不到，找了好久才发现，我在springmvc中没有配置静态文件
springmvc.xml
<!-- 静态资源访问 -->
<mvc:default-servlet-handler/>
<!-- 当我仅配置上面的时候又发现src是引用到了，但是我的RequestMapping映射却变成请求不到了，所以下面的也一定要加上 -->
<mvc:annotation-driven></mvc:annotation-driven>
第四步、LeadingExcelController.java
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.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest; import com.ssm.model.Family;
import com.ssm.service.impl.ImportExcelUtil; @Controller
@RequestMapping("/jsp/uploadExcel")
public class LeadingExcelController { @RequestMapping("/form")
public String form(HttpServletRequest request)throws Exception{
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; 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);
Family family = new Family();
family.setJtbh(String.valueOf(lo.get(0)));
family.setXm(String.valueOf(lo.get(1)));
family.setHy(String.valueOf(lo.get(2)));
family.setBz(String.valueOf(lo.get(3))); System.out.println("打印信息-->"+family.toString());
} return null;
} @RequestMapping(value="/ajax")
public void ajaxUploadExcel(HttpServletRequest request,HttpServletResponse response) throws Exception {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request; 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);
Family family = new Family();
family.setJtbh(String.valueOf(lo.get(0)));
family.setXm(String.valueOf(lo.get(1)));
family.setHy(String.valueOf(lo.get(2)));
family.setBz(String.valueOf(lo.get(3))); System.out.println("打印信息-->"+family.toString());
} 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();
} }
第五步、ImportExcelUtil.java 报表导入实现层
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);
}
}
in.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;
}
}
第六步：最终效果，当我点击通过表单和ajax提交时
(1)先展示上传的xls文件内容
(2)最终控制台打出：
(3)通过ajax导入成功，前端也会提示
完美！
想的太多，做的太少，中间的落差就是烦恼，要么去做，要么别想 少尉【12】