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ExcelUtils.java
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158 lines (144 loc) · 5.11 KB
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/**
* Copyright (c) 2018 人人开源 All rights reserved.
* <p>
* https://www.renren.io
* <p>
* 版权所有，侵权必究！
*/
package ericzz.utils;
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 lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.beans.BeanUtils;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* excel工具类
*
* @author Mark sunlightcs@gmail.com
*/
@Slf4j
public class ExcelUtils {
public static String format(Date date) {
return format(date, "yyyy-MM-dd");
}
public static String format(Date date, String pattern) {
if (date != null) {
SimpleDateFormat df = new SimpleDateFormat(pattern);
return df.format(date);
} else {
return null;
}
}
/**
* Excel导出
*
* @param response response
* @param fileName 文件名
* @param list 数据List
* @param pojoClass 对象Class
*/
public static void exportExcel(HttpServletResponse response, String fileName, Collection<?> list,
Class<?> pojoClass, String title) throws IOException {
if (org.apache.commons.lang3.StringUtils.isEmpty(fileName)) {
//当前日期
fileName = ExcelUtils.format(new Date());
}
ExportParams ep = new ExportParams();
ep.setTitle(title);
// Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(), pojoClass, list);
Workbook workbook = ExcelExportUtil.exportExcel(ep, pojoClass, list);
response.setCharacterEncoding("UTF-8");
response.setHeader("content-Type", "application/vnd.ms-excel");
response.setHeader("Content-Disposition",
"attachment;filename=" + URLEncoder.encode(fileName, "UTF-8") + ".xls");
ServletOutputStream out = response.getOutputStream();
workbook.write(out);
out.flush();
}
/**
* Excel导出，先sourceList转换成List<targetClass>，再导出
*
* @param response response
* @param fileName 文件名
* @param sourceList 原数据List
* @param targetClass 目标对象Class
*/
public static void exportExcelToTarget(HttpServletResponse response, String fileName, Collection<?> sourceList,
Class<?> targetClass, String title) throws Exception {
List targetList = new ArrayList<>(sourceList.size());
for (Object source : sourceList) {
Object target = targetClass.newInstance();
BeanUtils.copyProperties(source, target);
targetList.add(target);
}
exportExcel(response, fileName, targetList, targetClass, title);
}
/**
* @param outputStream
* @param fileName
* @param list
* @param pojoClass
* @param title
* @throws Exception
*/
public static void exportExcelToOutStream(OutputStream outputStream, String fileName, Collection<?> list,
Class<?> pojoClass, String title) throws Exception {
List targetList = new ArrayList<>(list.size());
for (Object source : list) {
Object target = pojoClass.newInstance();
BeanUtils.copyProperties(source, target);
targetList.add(target);
}
ExportParams ep = new ExportParams();
if (StringUtils.isNotBlank(title)) {
ep.setTitle(title);
}
Workbook workbook = ExcelExportUtil.exportExcel(ep, pojoClass, targetList);
workbook.write(outputStream);
outputStream.flush();
}
/**
* 读取上传的excel返回List
*
* @param file
* @param inputStream
* @param list
* @return
*/
public static List<Map<String, Object>> readFile(MultipartFile file, InputStream inputStream,
List<Map<String, Object>> list) {
try {
inputStream = file.getInputStream();
ImportParams importParams = new ImportParams();
list = ExcelImportUtil.importExcel(inputStream, Map.class, importParams);
} catch (IOException e) {
log.info(e.getMessage());
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
log.info(e.getMessage());
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
log.info(e.getMessage());
}
}
}
return list;
}
}