package com.ruoyi.common.utils.poi;
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import cn.hutool.core.util.IdUtil;
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import com.alibaba.excel.EasyExcel;
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import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
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import com.ruoyi.common.convert.ExcelBigNumberConvert;
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import com.ruoyi.common.excel.DefaultExcelListener;
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import com.ruoyi.common.excel.ExcelResult;
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import com.ruoyi.common.utils.StringUtils;
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import com.ruoyi.common.utils.file.FileUtils;
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import javax.servlet.ServletOutputStream;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.List;
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/**
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* Excel相关处理
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*
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* @author Lion Li
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*/
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public class ExcelUtil {
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/**
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* 同步导入
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*
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* @param is 输入流
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* @return 转换后集合
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*/
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public static <T> List<T> importExcel(InputStream is, Class<T> clazz) {
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return EasyExcel.read(is).head(clazz).autoCloseStream(false).sheet().doReadSync();
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}
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/**
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* 使用校验监听器处理导入
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*
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* @param is 输入流
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* @param clazz 对象类型
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* @param isValidate 是否 Validator 检验 默认为是
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* @return 转换后集合
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*/
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public static <T> ExcelResult<T> importExcel(InputStream is, Class<T> clazz, boolean isValidate) {
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DefaultExcelListener<T> listener = new DefaultExcelListener<>(isValidate);
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EasyExcel.read(is, clazz, listener).sheet().doRead();
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return listener.getExcelResult();
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}
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/**
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* 使用自定义监听器导入
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*
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* @param is 输入流
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* @param clazz 对象类型
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* @param readListener 自定义监听器
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* @return 转换后集合
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*/
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public static <T> ExcelResult<T> importExcel(InputStream is, Class<T> clazz, DefaultExcelListener<T> readListener) {
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EasyExcel.read(is, clazz, readListener).sheet().doRead();
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return readListener.getExcelResult();
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}
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/**
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* 导出excel
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*
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* @param list 导出数据集合
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* @param sheetName 工作表的名称
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* @return 结果
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*/
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public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, HttpServletResponse response) {
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try {
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String filename = encodingFilename(sheetName);
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response.reset();
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FileUtils.setAttachmentResponseHeader(response, filename);
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response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");
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ServletOutputStream os = response.getOutputStream();
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EasyExcel.write(os, clazz)
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.autoCloseStream(false)
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// 自动适配
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.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
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// 大数值自动转换 防止失真
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.registerConverter(new ExcelBigNumberConvert())
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.sheet(sheetName).doWrite(list);
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} catch (IOException e) {
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throw new RuntimeException("导出Excel异常");
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}
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}
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/**
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* 解析导出值 0=男,1=女,2=未知
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*
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* @param propertyValue 参数值
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* @param converterExp 翻译注解
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* @param separator 分隔符
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* @return 解析后值
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*/
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public static String convertByExp(String propertyValue, String converterExp, String separator) {
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StringBuilder propertyString = new StringBuilder();
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String[] convertSource = converterExp.split(",");
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for (String item : convertSource) {
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String[] itemArray = item.split("=");
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if (StringUtils.containsAny(separator, propertyValue)) {
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for (String value : propertyValue.split(separator)) {
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if (itemArray[0].equals(value)) {
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propertyString.append(itemArray[1] + separator);
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break;
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}
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}
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} else {
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if (itemArray[0].equals(propertyValue)) {
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return itemArray[1];
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}
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}
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}
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return StringUtils.stripEnd(propertyString.toString(), separator);
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}
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/**
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* 反向解析值 男=0,女=1,未知=2
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*
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* @param propertyValue 参数值
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* @param converterExp 翻译注解
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* @param separator 分隔符
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* @return 解析后值
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*/
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public static String reverseByExp(String propertyValue, String converterExp, String separator) {
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StringBuilder propertyString = new StringBuilder();
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String[] convertSource = converterExp.split(",");
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for (String item : convertSource) {
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String[] itemArray = item.split("=");
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if (StringUtils.containsAny(separator, propertyValue)) {
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for (String value : propertyValue.split(separator)) {
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if (itemArray[1].equals(value)) {
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propertyString.append(itemArray[0] + separator);
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break;
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}
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}
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} else {
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if (itemArray[1].equals(propertyValue)) {
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return itemArray[0];
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}
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}
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}
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return StringUtils.stripEnd(propertyString.toString(), separator);
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}
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/**
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* 编码文件名
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*/
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public static String encodingFilename(String filename) {
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return IdUtil.fastSimpleUUID() + "_" + filename + ".xlsx";
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}
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}
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