add 增加 ExcelUtil 模板导出方法 支持 单列表/多列表

This commit is contained in:
疯狂的狮子li 2022-06-06 15:16:07 +08:00
parent 880101f338
commit a246cd044e

View File

@ -1,8 +1,14 @@
package com.ruoyi.common.utils.poi;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.io.resource.ClassPathResource;
import cn.hutool.core.util.IdUtil;
import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.write.builder.ExcelWriterSheetBuilder;
import com.alibaba.excel.write.metadata.WriteSheet;
import com.alibaba.excel.write.metadata.fill.FillConfig;
import com.alibaba.excel.write.metadata.fill.FillWrapper;
import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
import com.ruoyi.common.convert.ExcelBigNumberConvert;
import com.ruoyi.common.excel.CellMergeStrategy;
@ -18,7 +24,10 @@ import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.Collection;
import java.util.List;
import java.util.Map;
/**
* Excel相关处理
@ -89,10 +98,7 @@ public class ExcelUtil {
*/
public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, boolean merge, HttpServletResponse response) {
try {
String filename = encodingFilename(sheetName);
response.reset();
FileUtils.setAttachmentResponseHeader(response, filename);
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");
resetResponse(sheetName, response);
ServletOutputStream os = response.getOutputStream();
ExcelWriterSheetBuilder builder = EasyExcel.write(os, clazz)
.autoCloseStream(false)
@ -111,6 +117,88 @@ public class ExcelUtil {
}
}
/**
* 单表多数据模板导出 模板格式为 {.属性}
*
* @param filename 文件名
* @param templatePath 模板路径 resource 目录下的路径包括模板文件名
* 例如: excel/temp.xlsx
* 重点: 模板文件必须放置到启动类对应的 resource 目录下
* @param data 模板需要的数据
*/
public static void exportTemplate(List<Object> data, String filename, String templatePath, HttpServletResponse response) {
try {
resetResponse(filename, response);
ClassPathResource templateResource = new ClassPathResource(templatePath);
ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream())
.withTemplate(templateResource.getStream())
.autoCloseStream(false)
// 大数值自动转换 防止失真
.registerConverter(new ExcelBigNumberConvert())
.build();
WriteSheet writeSheet = EasyExcel.writerSheet().build();
if (CollUtil.isEmpty(data)) {
throw new IllegalArgumentException("数据为空");
}
// 单表多数据导出 模板格式为 {.属性}
for (Object d : data) {
excelWriter.fill(d, writeSheet);
}
excelWriter.finish();
} catch (IOException e) {
throw new RuntimeException("导出Excel异常");
}
}
/**
* 多表多数据模板导出 模板格式为 {key.属性}
*
* @param filename 文件名
* @param templatePath 模板路径 resource 目录下的路径包括模板文件名
* 例如: excel/temp.xlsx
* 重点: 模板文件必须放置到启动类对应的 resource 目录下
* @param data 模板需要的数据
*/
public static void exportTemplateMultiList(Map<String, Object> data, String filename, String templatePath, HttpServletResponse response) {
try {
resetResponse(filename, response);
ClassPathResource templateResource = new ClassPathResource(templatePath);
ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream())
.withTemplate(templateResource.getStream())
.autoCloseStream(false)
// 大数值自动转换 防止失真
.registerConverter(new ExcelBigNumberConvert())
.build();
WriteSheet writeSheet = EasyExcel.writerSheet().build();
if (CollUtil.isEmpty(data)) {
throw new IllegalArgumentException("数据为空");
}
for (Map.Entry<String, Object> map : data.entrySet()) {
// 设置列表后续还有数据
FillConfig fillConfig = FillConfig.builder().forceNewRow(Boolean.TRUE).build();
if (map.getValue() instanceof Collection) {
// 多表导出必须使用 FillWrapper
excelWriter.fill(new FillWrapper(map.getKey(), (Collection<?>) map.getValue()), fillConfig, writeSheet);
} else {
excelWriter.fill(map.getValue(), writeSheet);
}
}
excelWriter.finish();
} catch (IOException e) {
throw new RuntimeException("导出Excel异常");
}
}
/**
* 重置响应体
*/
private static void resetResponse(String sheetName, HttpServletResponse response) throws UnsupportedEncodingException {
String filename = encodingFilename(sheetName);
response.reset();
FileUtils.setAttachmentResponseHeader(response, filename);
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");
}
/**
* 解析导出值 0=,1=,2=未知
*