原 easypoi工具类

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本文链接：https://www.91mszl.com/zhangwuji/article/details/1224

一：easypoi工具类：

package cn.gaialab.gaiamind.microservice.brp.util;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

public class ExcelUtils {

	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
			boolean isCreateHeader, HttpServletResponse response) {
		ExportParams exportParams = new ExportParams(title, sheetName);
		exportParams.setCreateHeadRows(isCreateHeader);
		defaultExport(list, pojoClass, fileName, response, exportParams);
	}
 
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName,
			HttpServletResponse response) {
		defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
	}
 
	public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
		defaultExport(list, fileName, response);
	}
 
	private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response,
			ExportParams exportParams) {
		Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
		if (workbook != null)
			;
		downLoadExcel(fileName, response, workbook);
	}
 
	private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
		try {
			response.setCharacterEncoding("UTF-8");
			response.setHeader("content-Type", "application/vnd.ms-excel");
			response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
			workbook.write(response.getOutputStream());
		} catch (IOException e) {
			// throw new NormalException(e.getMessage());
		}
	}
 
	private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
		Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
		if (workbook != null)
			;
		downLoadExcel(fileName, response, workbook);
	}
 
	public static <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 (NoSuchElementException e) {
			// throw new NormalException("模板不能为空");
		} catch (Exception e) {
			e.printStackTrace();
			// throw new NormalException(e.getMessage());
		}
		return list;
	}
 
	public static <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 (NoSuchElementException e) {
			// throw new NormalException("excel文件不能为空");
		} catch (Exception e) {
			// throw new NormalException(e.getMessage());
			System.out.println(e.getMessage());
		}
		return list;
	}
	
	
	
}

二：使用方法。

package com.mszl.controller;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import com.alibaba.fastjson.JSONObject;

import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.result.ExcelImportResult;
import cn.gaialab.gaiamind.microservice.brp.entity.Ajob;
import cn.gaialab.gaiamind.microservice.brp.util.ExcelUtils;
import lombok.extern.slf4j.Slf4j;

@Slf4j
@RestController
@RequestMapping("/execl")
public class ExeclController {
	
	@GetMapping("/exportExecl")
	public void exportExecl(HttpServletResponse response) {
		List<Ajob> list = new ArrayList<>();
		Ajob bb = new Ajob();
		bb.setId("111111");
		bb.setJobName("MA");
		bb.setWorkDays(10);
		list.add(bb);
		ExcelUtils.exportExcel(list, null, null, Ajob.class, "123.xlsx", response);
	}
	
	@PostMapping("/importExecl")
	public String importExecl(@RequestParam("file") MultipartFile file) {
		ImportParams importParams = new ImportParams();
		// 数据处理
		importParams.setTitleRows(0); // 表格标题行数,默认0
		importParams.setHeadRows(1); // 表头行数,默认1
		// 需要验证
		importParams.setNeedVerify(false);
		try {
			ExcelImportResult<Ajob> result = ExcelImportUtil.importExcelMore(file.getInputStream(), Ajob.class, importParams);
			List<Ajob> jobList = result.getList();
			for (Ajob bb : jobList) {
				log.info("从Excel导入数据到数据库的详细为 ：{}", JSONObject.toJSONString(bb));
				// 将导入的数据保存数据库......
			}
			log.info("从Excel导入数据一共 {} 行 ", jobList.size());
		} catch (IOException e) {
			log.error("导入失败：{}", e.getMessage());
		} catch (Exception e1) {
			log.error("导入失败：{}", e1.getMessage());
		}
		return "导入成功";
	}
	

}