easypoi实现Excel导入

最近做的一个项目用到了Excel导入，我选择了使用easypoi进行Excel解析。

1.前期准备

如果使用maven等项目管理工具，在配置文件pom.xml中，添加以下三个依赖:

  <dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-base</artifactId><version>3.0.3</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-web</artifactId><version>3.0.3</version></dependency><dependency><groupId>cn.afterturn</groupId><artifactId>easypoi-annotation</artifactId><version>3.0.3</version></dependency>

如果没使用项目管理工具，在build path中导入三个jar包

image.png

2.业务流程

客户下载Excel模板----->客户填写Excel上传----->解析Excel----->将数据持久化存储（录入数据库）----->查询操作，将数据显示在数据表格

Excel模板:

image.png

填写后的Excel:

image.png

3.效果预览

layer.gif

可以看见，我们在Excel中录入的名称为hello和world的数据已经录入数据库了。

4.代码实现

前端使用layui(别的前端UI框架也可以使用文件上传功能即可):

<div class="layui-btn-container"><a class="layui-btn btn-add btn-default" id="btn-excel">选择Excel文件</a>&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;&emsp;<a class="layui-btn btn-add btn-default" id="btn-excel-sure">上传导入</a>
</div>layui.use(['upload'], function() {var  $ = layui.jquery;var upload = layui.upload;
}layui.use(['element', 'form', 'table', 'layer', 'vip_table', 'laydate','upload'], function() {var form = layui.form,table = layui.table,layer = layui.layer,vipTable = layui.vip_table,element = layui.element,$ = layui.jquery;var laydate = layui.laydate;var upload = layui.upload;//Excel导入upload.render({elem: '#btn-excel',url: 'layer/excelparser?fileName=1',auto: false//,multiple: true,bindAction: '#btn-excel-sure',size: 2048 //最大允许上传的文件大小 2M,accept: 'file' //允许上传的文件类型,exts:'xlsx'//只上传pdf文档,done: function(res){console.log(res)if(res.code == 1){//成功的回调//do something （比如将res返回的图片链接保存到表单的隐藏域）// $('#set-add-put input[name="fileName"]').val(res.data.fileName);layer.msg(res.msg, {icon: 6});location.reload();}else if(res.code==2){layer.msg(res.msg, {icon: 5});}}});
});

这里使用layui实现上传下载的组件，并对返回结果进行回调，状态码1成功，2失败

后台:
Controller层:

 /*** 处理Excel解析的方法* @param file 前台上传的文件对象* @return*/@RequestMapping(value = "Index/layer/excelparser")@ResponseBodypublic   Map<String,Object> Excel(HttpServletRequest request,@RequestParam("file")MultipartFile file)throws Exception{Map<String, Object> dataMap = new HashMap<String, Object>();String fileName1 = request.getParameter("fileName");// 设置文件名，根据业务需要替换成要下载的文件名String fileName;try {//上传目录地址String uploadDir = request.getSession().getServletContext().getRealPath("/") +"upload/";uploadDir=uploadDir.substring(0,uploadDir.length()-1);uploadDir=uploadDir+"\\";//下载目录String realPath=uploadDir+fileName1;//File dir = new File(realPath);if(!dir.exists()){dir.mkdir();}//调用上传方法fileName=upload.executeUpload1(uploadDir, file,fileName1);uploadDir=uploadDir.substring(0,uploadDir.length()-1);dataMap.put("fileName",fileName);dataMap.put("dir",uploadDir);}catch (Exception e){//打印错误堆栈信息e.printStackTrace();return api.returnJson(2,"解析失败",dataMap);}ExcelParser(fileName);return api.returnJson(1,"解析成功",dataMap);}public void ExcelParser(String fileName)throws Exception{ImportParams params = new ImportParams();params.setTitleRows(1);params.setHeadRows(1);long start = new Date().getTime();List<Layer> list=new ArrayList<>();list = upload.importExcel("C:/Users/sl/Desktop/layer/layer/src/main/webapp/upload/"+fileName, 1, 1, Layer.class);System.out.println(new Date().getTime() - start);System.out.println(list.size());System.out.println(list);int testId=1;int isInsert=0;for (int i = 0; i <list.size() ; i++) {Layer layer=new Layer();UUID uuid=UUID.randomUUID();String layerId=uuid.toString();layer.setLayerId(layerId);layer.setLayerName(list.get(i).getLayerName());layer.setDescription(list.get(i).getDescription());layer.setRecordTime(list.get(i).getRecordTime());layer.setReleaseTime(list.get(i).getReleaseTime());int is_add=layerService.InsertLayer(layer);System.out.println(is_add);}
}

用到的工具类:Upload.java

package com.example.sl.layer.util;import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import org.apache.commons.lang3.StringUtils;
import org.springframework.web.multipart.MultipartFile;import java.io.File;
import java.util.List;
import java.util.UUID;//上传
public class Upload {public  String executeUpload1(String uploadDir,MultipartFile file,String fileName) throws Exception{//文件后缀名String suffix = file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf("."));//上传文件名String filename = fileName + suffix;//服务器端保存的文件对象File serverFile = new File(uploadDir + filename);//将上传的文件写入到服务器端文件内file.transferTo(serverFile);return filename;}public  <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass){if (StringUtils.isBlank(filePath)){return null;}ImportParams params = new ImportParams();params.setTitleRows(titleRows);params.setHeadRows(headerRows);List<T> list = null;try {list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);}catch (Exception e) {e.printStackTrace();}return list;}public  <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass){if (file == null){return null;}ImportParams params = new ImportParams();params.setTitleRows(titleRows);params.setHeadRows(headerRows);List<T> list = null;try {list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);} catch (Exception e) {e.printStackTrace();}return list;}}

model层实体类:(这里使用easypoi的注解解析，对时间等特殊格式也加上解析即可)

package com.example.sl.layer.model;import cn.afterturn.easypoi.excel.annotation.Excel;
import cn.afterturn.easypoi.excel.annotation.ExcelTarget;
import com.fasterxml.jackson.annotation.JsonFormat;import java.util.Date;@ExcelTarget("Layer")
public class Layer {private String layerId;@Excel(name = "法规名称", isImportField = "true_st")private String layerName;@Excel(name = "法规描述", isImportField = "true_st")private String description;@Excel(name = "法规发布日期",importFormat = "yyyy-MM-dd")private Date releaseTime;@Excel(name = "法规上传日期",importFormat = "yyyy-MM-dd")private Date recordTime;private String fileName;public String getLayerId() {return layerId;}public void setLayerId(String layerId) {this.layerId = layerId == null ? null : layerId.trim();}public String getLayerName() {return layerName;}public void setLayerName(String layerName) {this.layerName = layerName == null ? null : layerName.trim();}public String getDescription() {return description;}public void setDescription(String description) {this.description = description == null ? null : description.trim();}public Date getReleaseTime() {return releaseTime;}public void setReleaseTime(Date releaseTime) {this.releaseTime = releaseTime;}public Date getRecordTime() {return recordTime;}public void setRecordTime(Date recordTime) {this.recordTime = recordTime;}public String getFileName() {return fileName;}public void setFileName(String fileName) {this.fileName = fileName == null ? null : fileName.trim();}
}

dao层:

package com.example.sl.layer.dao;import com.example.sl.layer.model.Layer;
import org.apache.ibatis.annotations.Param;import java.util.Date;
import java.util.List;public interface LayerMapper {int insert(Layer record);
}

Service层:
LayerService:

package com.example.sl.layer.service;import com.example.sl.layer.model.Layer;import java.util.Date;
import java.util.List;public interface LayerService {public int InsertLayer(Layer layer);}

LayerServiceImpl:

package com.example.sl.layer.service;import com.example.sl.layer.dao.LayerMapper;
import com.example.sl.layer.model.Layer;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;import javax.annotation.Resource;
import java.util.Date;
import java.util.List;@Service("layerService")
@Transactional
public class LayerServiceImpl implements LayerService{@Resourceprivate LayerMapper layerMapper;@Overridepublic int InsertLayer(Layer layer) {return layerMapper.insert(layer);}
}

5.最终实现

layer.gif

image.png

解析成功，并且入库。

喜欢就给颗小吧。