说明
POI可以对2003-和2007+版本的Excel文件做导入导出操作,本章只简单介绍对Excel文件的导入操作。
Excel文件的上传处理处理请求,依然使用SpringMvc中的MultipartRequest方式处理。
前端JSP中使用传统form表单提交方式和Juery.form.js插件提供的异步表单请求方式,分别对这两种方式进行介绍。
环境
Maven+JDK8+ Tomcat7.x + Spring4.1.8
说明:
jquery.form.js 的版本要3.23左右
ImportExcelUtil.Java:Excel解析工具类
UploadExcelControl.java :处理来自页面的请求控制器
InfoVo.java :将Excel转换为对象存储
main.jsp:前端访问页
........
pom.xml:
org.apache.poi
poi
3.9
org.apache.poi
poi-ooxml
3.9
ImportExcelUtil.java(Excel解析工具类)
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控制器)
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();
}
}
package com.poiexcel.vo;
//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;
}
}
**web.xml**:
org.springframework.web.context.ContextLoaderListener
contextConfigLocation
WEB-INF/application/applicationContext-*.xml
springmvc
org.springframework.web.servlet.DispatcherServlet
1
springmvc
*.do
main.jsp
```
springmvc-servlet.xml(只做简单配置)
<!-- 启动注解驱动--> <mvc:annotation-driven/> <!-- 启动包扫描功能--> <context:component-scan base-package="com.poiexcel.*" />
applicationContext-base.xml
<!-- 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>
效果
后台打印信息
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