easypoi导出带动态下拉框
easypoi导出带动态下拉框。
实体注解：
package com.springbooteasypoi.entity.excel.select; import cn.afterturn.easypoi.excel.annotation.Excel; import lombok.Data; /** * Created by Administrator on 2022/12/6. */ @Data public class Student { @Excel(name = "姓名",width = 20) private String name; // 动态下拉框字段：dict,addressList = true @Excel(name = "学生类型",dict = "level",addressList = true,width = 20) private String type; }
handler：
package com.springbooteasypoi.handler.excel.select; import cn.afterturn.easypoi.handler.inter.IExcelDictHandler; import org.springframework.stereotype.Component; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Created by Administrator on 2022/12/6. */ @Component public class ExcelDicHandler implements IExcelDictHandler { @Override public List<Map> getList(String dict) { List<Map> list = new ArrayList<>(); Map<String, String> dictMap = new HashMap<>(); dictMap.put("dictKey", "0"); dictMap.put("dictValue", "严重瞌睡"); list.add(dictMap); dictMap = new HashMap<>(); dictMap.put("dictKey", "1"); dictMap.put("dictValue", "小B"); list.add(dictMap); dictMap = new HashMap<>(); dictMap.put("dictKey", "2"); dictMap.put("dictValue", "深度富有"); list.add(dictMap); return list; } // 导出用到 @Override public String toName(String dict, Object obj, String name, Object value) { if ("level".equals(dict)) { int level = Integer.parseInt(value.toString()); switch (level) { case 1: return "小B"; case 0: return "严重瞌睡"; case 2: return "深度富有"; } } return null; } // 导入用到 @Override public String toValue(String dict, Object obj, String name, Object value) { if ("level".equals(dict)) { String valueStr = String.valueOf(value); switch (valueStr) { case "小B": return "1"; case "严重瞌睡": return "0"; case "深度富有": return "2"; } } return null; } }
导入导出：
package com.springbooteasypoi.controller.excel.select; 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.result.ExcelImportResult; import com.springbooteasypoi.entity.excel.select.Student; import com.springbooteasypoi.entity.response.ResponseObjectResult; import com.springbooteasypoi.entity.response.ResponseStatus; import com.springbooteasypoi.entity.response.ResultCode; import com.springbooteasypoi.handler.excel.select.ExcelDicHandler; import org.apache.poi.ss.usermodel.Workbook; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestPart; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.MultipartFile; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.List; /** * @description: 动态下拉框 * @author liuyachao * @date 2022/12/6 12:34 */ @RestController @RequestMapping("/select") public class SelectController { // 无数据导出 @PostMapping("/exportDynamicSelect") public void exportTest(HttpServletResponse resp){ try { ExportParams exportParams = new ExportParams("测试", "测试"); exportParams.setDictHandler(new ExcelDicHandler()); exportParams.setCreateHeadRows(true); List<Student> list = new ArrayList<>(); Workbook workbook = ExcelExportUtil.exportExcel(exportParams, Student.class, list); File filePath = new File("D:/easypoi"); if(!filePath.exists()){ filePath.mkdirs(); } SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); File localFile = new File("D:/easypoi" + File.separator + "test" + sdf.format(new Date()) + ".xls"); localFile.setReadable(true, false); OutputStream os = new FileOutputStream(localFile); workbook.write(os); os.flush(); os.close(); } catch (Exception e) { e.printStackTrace(); } } // 有数据导出 @PostMapping("/exportDynamicSelect2") public void exportTest2(HttpServletResponse resp){ try { ExportParams exportParams = new ExportParams("测试", "测试"); exportParams.setDictHandler(new ExcelDicHandler()); exportParams.setCreateHeadRows(true); List<Student> list = new ArrayList<>(); Student s1 = new Student(); s1.setName("xiao"); s1.setType("0"); Student s2 = new Student(); s2.setName("da"); s2.setType("1"); list.add(s1); list.add(s2); Workbook workbook = ExcelExportUtil.exportExcel(exportParams, Student.class, list); File filePath = new File("D:/easypoi"); if(!filePath.exists()){ filePath.mkdirs(); } SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss"); File localFile = new File("D:/easypoi" + File.separator + "test" + sdf.format(new Date()) + ".xls"); localFile.setReadable(true, false); OutputStream os = new FileOutputStream(localFile); workbook.write(os); os.flush(); os.close(); } catch (Exception e) { e.printStackTrace(); } } // 导入 @PostMapping("/importDynamicSelect") public ResponseObjectResult importDynamicSelect(@RequestPart(value = "file") MultipartFile file, HttpServletResponse resp){ try { //判断文件是否存在 if (file == null) { return new ResponseObjectResult(new ResponseStatus(ResultCode.ILLEGALINPUT)); } //获得文件名 String fileName = file.getOriginalFilename(); //判断文件是否是excel文件 if (!fileName.endsWith(".xls") && !fileName.endsWith(".xlsx")) { return new ResponseObjectResult(new ResponseStatus(10001, "不是excel文件", false)); } ImportParams params = new ImportParams(); //设置标题占行 params.setTitleRows(1); //设置表头占行 params.setHeadRows(1); //解决空行问题 选择一个不为空的列 params.setKeyIndex(1); //sheet位置 从0开始 // params.setStartSheetIndex(0); // params.setStartRows(2); //代表导入这里是需要验证的（根据字段上的注解校验） params.setNeedVerify(true); params.setDictHandler(new ExcelDicHandler()); //获取excel文件的io流 List<Student> list = null; try { InputStream is = file.getInputStream(); ExcelImportResult<Student> result = ExcelImportUtil.importExcelMore(is, Student.class, params); list = result.getList(); //失败结果集 List<Student> failList = result.getFailList(); //拿到导出失败的工作簿 Workbook failWorkbook = result.getFailWorkbook(); // Workbook workbook = result.getWorkbook(); //验证是否有失败的数据 if (result.isVerifyFail()) { ServletOutputStream fos = resp.getOutputStream(); //mime类型 resp.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); resp.setHeader("Content-disposition", "attachment;filename=error.xlsx"); result.getFailWorkbook().write(fos); // workbook.write(fos); // failWorkbook.write(fos); fos.close(); // java.lang.IllegalStateException: Cannot call sendError() after the response has been committed //return new ResponseObjectResult(new ResponseStatus(ResultCode.FAIL),failList); return null; } } catch (Exception e) { e.printStackTrace(); } return new ResponseObjectResult(new ResponseStatus(ResultCode.SUCCESS)); } catch (Exception e) { e.printStackTrace(); return new ResponseObjectResult(new ResponseStatus(ResultCode.FAIL)); } } }
效果图：
导出空数据模板：
导出：
导入：
注意：
如果注解没有addressList，需升级easypoi版本，我的是由4.1.3升级到了4.3.0就有了。
<!--使用easypoi,可以导出大数量的文件--> <!-- https://mvnrepository.com/artifact/org.apache.poi/poi --> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-base</artifactId> <version>4.3.0</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-web</artifactId> <version>4.3.0</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-annotation</artifactId> <version>4.3.0</version> <!--4.1.3--> </dependency>
easpoi的api文档：
http://doc.wupaas.com/docs/easypoi/easypoi-1c2cp5rf3hnqv
老版本：
http://easypoi.mydoc.io/#text_202975
新版本才有下拉框相关api。
