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- package com.ruoyi.common.utils.poi;
- import cn.hutool.core.util.IdUtil;
- import com.alibaba.excel.EasyExcel;
- import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
- import com.ruoyi.common.utils.DictUtils;
- import com.ruoyi.common.utils.StringUtils;
- import com.ruoyi.common.utils.file.FileUtils;
- import javax.servlet.ServletOutputStream;
- import javax.servlet.http.HttpServletResponse;
- import java.io.IOException;
- import java.io.InputStream;
- import java.net.URLEncoder;
- import java.nio.charset.StandardCharsets;
- import java.util.List;
- /**
- * Excel相关处理
- *
- * @author ruoyi
- */
- public class ExcelUtil {
- /**
- * 对excel表单默认第一个索引名转换成list(EasyExcel)
- *
- * @param is 输入流
- * @return 转换后集合
- */
- public static <T> List<T> importExcel(InputStream is, Class<T> clazz) {
- return EasyExcel.read(is).autoCloseStream(false).sheet().doReadSync();
- }
- /**
- * 对list数据源将其里面的数据导入到excel表单(EasyExcel)
- *
- * @param list 导出数据集合
- * @param sheetName 工作表的名称
- * @return 结果
- */
- public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, HttpServletResponse response) {
- try {
- String filename = encodingFilename(sheetName);
- response.reset();
- response.addHeader("Access-Control-Allow-Origin", "*");
- response.addHeader("Access-Control-Expose-Headers", "Content-Disposition");
- FileUtils.setAttachmentResponseHeader(response, URLEncoder.encode(filename, StandardCharsets.UTF_8.toString()));
- response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");
- ServletOutputStream os = response.getOutputStream();
- EasyExcel.write(os, clazz)
- .autoCloseStream(false)
- // 自动适配
- .registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
- .sheet(sheetName).doWrite(list);
- } catch (IOException e) {
- throw new RuntimeException("导出Excel异常");
- }
- }
- /**
- * 解析导出值 0=男,1=女,2=未知
- *
- * @param propertyValue 参数值
- * @param converterExp 翻译注解
- * @param separator 分隔符
- * @return 解析后值
- */
- public static String convertByExp(String propertyValue, String converterExp, String separator) {
- StringBuilder propertyString = new StringBuilder();
- String[] convertSource = converterExp.split(",");
- for (String item : convertSource) {
- String[] itemArray = item.split("=");
- if (StringUtils.containsAny(separator, propertyValue)) {
- for (String value : propertyValue.split(separator)) {
- if (itemArray[0].equals(value)) {
- propertyString.append(itemArray[1] + separator);
- break;
- }
- }
- } else {
- if (itemArray[0].equals(propertyValue)) {
- return itemArray[1];
- }
- }
- }
- return StringUtils.stripEnd(propertyString.toString(), separator);
- }
- /**
- * 反向解析值 男=0,女=1,未知=2
- *
- * @param propertyValue 参数值
- * @param converterExp 翻译注解
- * @param separator 分隔符
- * @return 解析后值
- */
- public static String reverseByExp(String propertyValue, String converterExp, String separator) {
- StringBuilder propertyString = new StringBuilder();
- String[] convertSource = converterExp.split(",");
- for (String item : convertSource) {
- String[] itemArray = item.split("=");
- if (StringUtils.containsAny(separator, propertyValue)) {
- for (String value : propertyValue.split(separator)) {
- if (itemArray[1].equals(value)) {
- propertyString.append(itemArray[0] + separator);
- break;
- }
- }
- } else {
- if (itemArray[1].equals(propertyValue)) {
- return itemArray[0];
- }
- }
- }
- return StringUtils.stripEnd(propertyString.toString(), separator);
- }
- /**
- * 解析字典值
- *
- * @param dictValue 字典值
- * @param dictType 字典类型
- * @param separator 分隔符
- * @return 字典标签
- */
- public static String convertDictByExp(String dictValue, String dictType, String separator) {
- return DictUtils.getDictLabel(dictType, dictValue, separator);
- }
- /**
- * 反向解析值字典值
- *
- * @param dictLabel 字典标签
- * @param dictType 字典类型
- * @param separator 分隔符
- * @return 字典值
- */
- public static String reverseDictByExp(String dictLabel, String dictType, String separator) {
- return DictUtils.getDictValue(dictType, dictLabel, separator);
- }
- /**
- * 编码文件名
- */
- public static String encodingFilename(String filename) {
- return IdUtil.fastSimpleUUID() + "_" + filename + ".xlsx";
- }
- }
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