EasyExcel导出带下拉选数据的Excel数据导入模板

#因为项目中需要导入一些信息,但是这些信息比较不常见,且在项目字典数据中维护有这些数据,所以在导出模板的时候,把这些数据一并导出,可以减少用户的编写,避免在导入的时候因为数据错误,发生一些业务问题

直接开始

一、首先引入依赖   easyexcel依赖

<!--easyexcel依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>2.2.10</version>
        </dependency>

二、创建自定义注解



import java.lang.annotation.*;

/**
 * 标注导出的列为下拉框类型,并为下拉框设置内容
 */
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface ExcelSelected {
	/**
	 * 固定下拉内容
	 */
	String[] source() default {};

	/**
	 * 动态下拉内容
	 */
	Class<? extends ExcelDynamicSelect>[] sourceClass() default {};

	/**
	 * 设置下拉框的起始行,默认为第二行
	 */
	int firstRow() default 1;

	/**
	 * 设置下拉框的结束行,默认为最后一行
	 */
	int lastRow() default 0x10000;
}

三、解析自定义注解接口


public interface ExcelDynamicSelect {
	/**
	 * 获取动态生成的下拉框可选数据
	 * @return 动态生成的下拉框可选数据
	 */
	String[] getSource();
}

四、创建一个实体类,(这边以我项目内的演示)

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.annotation.write.style.ColumnWidth;
import com.alibaba.excel.annotation.write.style.ContentRowHeight;
import com.alibaba.excel.annotation.write.style.HeadRowHeight;
import lombok.Data;
import org.springblade.basicdata.service.impl.DeptTemplateServiceImpl;
import org.springblade.basicdata.service.impl.SchoolTemplateServiceImpl;
import org.springblade.basicdata.service.impl.StationlateServiceImpl;
import org.springblade.basicdata.service.impl.ZgTypeslateServiceImpl;

import java.io.Serializable;


@Data
@HeadRowHeight(20)
@ContentRowHeight(18)
public class TeacherExcel implements Serializable {

	private static final long serialVersionUID = 1L;

	/**
	 * 职工编号
	 */
	@ExcelProperty(index = 0, value = "职工编号")
	@ColumnWidth(20)
	private String no;
	/**
	 * 姓名
	 */
	@ExcelProperty(index = 1, value = "姓名")
	@ColumnWidth(30)
	private String name;
	/**
	 * 身份证
	 */
	@ExcelProperty(index = 2, value = "身份证号")
	@ColumnWidth(25)
	private String idCard;

	/**
	 * 电话
	 */
	@ExcelProperty(index = 3, value = "联系电话")
	@ColumnWidth(15)
	private String phone;
	/**
	 * 学校id
	 */
    //需要自定义实现  SchoolTemplateServiceImpl,下面有具体的实现方式
	@ExcelSelected(sourceClass = SchoolTemplateServiceImpl.class)
	@ExcelProperty(index = 4, value = "校区")
	@ColumnWidth(45)
	private String schoolName;
	/**
	 * 部门
	 */
    //需要自定义实现  DeptTemplateServiceImpl,下面有具体的实现方式
	@ExcelSelected(sourceClass = DeptTemplateServiceImpl.class)
	@ExcelProperty(index = 5, value = "部门")
	@ColumnWidth(45)
	private String bumenName;
	/**
	 * 岗位类别
	 */
    //需要自定义实现  StationlateServiceImpl,下面有具体的实现方式
	@ExcelSelected(sourceClass = StationlateServiceImpl.class)
	@ExcelProperty(index = 6, value = "岗位类别")
	@ColumnWidth(15)
	private String station;
	/**
	 * 职工类型
	 */
    //需要自定义实现  ZgTypeslateServiceImpl,下面有具体的实现方式
	@ExcelSelected(sourceClass = ZgTypeslateServiceImpl.class)
	@ExcelProperty(index = 7, value = "职工类型")
	@ColumnWidth(15)
	private String zhigongleibie;
	/**
	 * 备注
	 */
	@ExcelProperty(index = 8, value = "备注")
	@ColumnWidth(15)
	private String remarks;


}

五、重点是以下的代码

1、以岗位类型为例,展示数据的实现方式

创建StationlateServiceImpl实现类,实现方法 为我自己的业务需求,你们可以根据你们的情况去修改,这边返回给注解的是一个字符串的数组,也就是需要导出的下拉选数据


import java.util.List;
import java.util.stream.Collectors;

/**
 * 岗位类别下拉选数据实现类
 */
public class StationlateServiceImpl implements ExcelDynamicSelect {

	private static IDictClient dictClient;


	static {
		dictClient = SpringUtil.getBean(IDictClient.class);
	}



	@Override
	public String[] getSource() {
		R<List<Dict>> dictClientList =
			dictClient.getList(DictEnum.POST_TYPE.getName());
		if(Func.isNotEmpty(dictClientList) && dictClientList.getCode() == 200){
			if(Func.isNotEmpty(dictClientList.getData())){
				return Func.toStrArray(dictClientList.getData().stream().map(Dict::getDictValue).collect(Collectors.joining(",")));
			}
		}
		return new String[0];
	}
}

Func.toStrArray方法就是讲给定的逗号拼接的字符串转为字符串数组,这个百度一下,一大堆

六、EasyExcelUtil工具类

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.write.metadata.WriteSheet;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


@Slf4j
public class EasyExcelUtil {

	/**
	 * 创建即将导出的sheet页(sheet页中含有带下拉框的列)
	 * @param head 导出的表头信息和配置
	 * @param sheetNo sheet索引
	 * @param sheetName sheet名称
	 * @param <T> 泛型
	 * @return sheet页
	 */
	public static <T> WriteSheet writeSelectedSheet(Class<T> head, Integer sheetNo, String sheetName) {
		Map<Integer, ExcelSelectedResolve> selectedMap = resolveSelectedAnnotation(head);

		return EasyExcel.writerSheet(sheetNo, sheetName)
			.head(head)
			.registerWriteHandler(new SelectedSheetWriteHandler(selectedMap))
			.build();
	}

	/**
	 * 解析表头类中的下拉注解
	 * @param head 表头类
	 * @param <T> 泛型
	 * @return Map<下拉框列索引, 下拉框内容> map
	 */
	private static <T> Map<Integer, ExcelSelectedResolve> resolveSelectedAnnotation(Class<T> head) {
		Map<Integer, ExcelSelectedResolve> selectedMap = new HashMap<>();

		// getDeclaredFields(): 返回全部声明的属性;getFields(): 返回public类型的属性
		Field[] fields = head.getDeclaredFields();
		for (int i = 0; i < fields.length; i++){
			Field field = fields[i];
			// 解析注解信息
			ExcelSelected selected = field.getAnnotation(ExcelSelected.class);
			ExcelProperty property = field.getAnnotation(ExcelProperty.class);
			if (selected != null) {
				ExcelSelectedResolve excelSelectedResolve = new ExcelSelectedResolve();
				String[] source = excelSelectedResolve.resolveSelectedSource(selected);
				if (source != null && source.length > 0){
					excelSelectedResolve.setSource(source);
					excelSelectedResolve.setFirstRow(selected.firstRow());
					excelSelectedResolve.setLastRow(selected.lastRow());
					if (property != null && property.index() >= 0){
						selectedMap.put(property.index(), excelSelectedResolve);
					} else {
						selectedMap.put(i, excelSelectedResolve);
					}
				}
			}
		}
		return selectedMap;
	}

	public static boolean isIDNumber(String IDNumber) {
		if (IDNumber == null || "".equals(IDNumber)) {
			return false;
		}
		// 定义判别用户身份证号的正则表达式(15位或者18位,最后一位可以为字母)
		String regularExpression = "(^[1-9]\\d{5}(18|19|20)\\d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\\d{3}[0-9Xx]$)|" +
			"(^[1-9]\\d{5}\\d{2}((0[1-9])|(10|11|12))(([0-2][1-9])|10|20|30|31)\\d{3}$)";
		//假设18位身份证号码:41000119910101123X  410001 19910101 123X
		//^开头
		//[1-9] 第一位1-9中的一个      4
		//\\d{5} 五位数字           10001(前六位省市县地区)
		//(18|19|20)                19(现阶段可能取值范围18xx-20xx年)
		//\\d{2}                    91(年份)
		//((0[1-9])|(10|11|12))     01(月份)
		//(([0-2][1-9])|10|20|30|31)01(日期)
		//\\d{3} 三位数字            123(第十七位奇数代表男,偶数代表女)
		//[0-9Xx] 0123456789Xx其中的一个 X(第十八位为校验值)
		//$结尾

		//假设15位身份证号码:410001910101123  410001 910101 123
		//^开头
		//[1-9] 第一位1-9中的一个      4
		//\\d{5} 五位数字           10001(前六位省市县地区)
		//\\d{2}                    91(年份)
		//((0[1-9])|(10|11|12))     01(月份)
		//(([0-2][1-9])|10|20|30|31)01(日期)
		//\\d{3} 三位数字            123(第十五位奇数代表男,偶数代表女),15位身份证不含X
		//$结尾
		boolean matches = IDNumber.matches(regularExpression);

		//判断第18位校验值
		if (matches) {

			if (IDNumber.length() == 18) {
				try {
					char[] charArray = IDNumber.toCharArray();
					//前十七位加权因子
					int[] idCardWi = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
					//这是除以11后,可能产生的11位余数对应的验证码
					String[] idCardY = {"1", "0", "X", "9", "8", "7", "6", "5", "4", "3", "2"};
					int sum = 0;
					for (int i = 0; i < idCardWi.length; i++) {
						int current = Integer.parseInt(String.valueOf(charArray[i]));
						int count = current * idCardWi[i];
						sum += count;
					}
					char idCardLast = charArray[17];
					int idCardMod = sum % 11;
					if (idCardY[idCardMod].toUpperCase().equals(String.valueOf(idCardLast).toUpperCase())) {
						return true;
					} else {
						return false;
					}

				} catch (Exception e) {
					e.printStackTrace();
					return false;
				}
			}
			return false;
		}
		return matches;
	}


	public static  boolean isMobile(String phone){
		Pattern p = null;
		Matcher m = null;
		boolean b = false;
		// 验证手机号
		String s2="^[1](([3|5|6|7|8|9][\\d])|([4][4,5,6,7,8,9])|([6][2,5,6,7])|([7][^9])|([9][1,8,9]))[\\d]{8}$";
		if(StringUtils.isNotBlank(phone)){
			p = Pattern.compile(s2);
			m = p.matcher(phone);
			b = m.matches();
		}
		return b;
	}

}

七、SelectedSheetWriteHandler


import com.alibaba.excel.write.handler.SheetWriteHandler;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder;
import lombok.AllArgsConstructor;
import lombok.Data;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddressList;

import java.util.Map;

@Data
@AllArgsConstructor
public class SelectedSheetWriteHandler implements SheetWriteHandler {

	private final Map<Integer, ExcelSelectedResolve> selectedMap;

	/**
	 * Called before create the sheet
	 */
	@Override
	public void beforeSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) {

	}

	/**
	 * Called after the sheet is created
	 */
	@Override
	public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) {
		// 这里可以对cell进行任何操作
		Sheet sheet = writeSheetHolder.getSheet();
		DataValidationHelper helper = sheet.getDataValidationHelper();
		selectedMap.forEach((k, v) -> {
			// 设置下拉列表的行: 首行,末行,首列,末列
			CellRangeAddressList rangeList = new CellRangeAddressList(v.getFirstRow(), v.getLastRow(), k, k);
			// 设置下拉列表的值
			DataValidationConstraint constraint = helper.createExplicitListConstraint(v.getSource());
			// 设置约束
			DataValidation validation = helper.createValidation(constraint, rangeList);
			// 阻止输入非下拉选项的值
			validation.setErrorStyle(DataValidation.ErrorStyle.STOP);
			validation.setShowErrorBox(true);
			validation.setSuppressDropDownArrow(true);
			validation.createErrorBox("提示", "请输入下拉选项中的内容");
			sheet.addValidationData(validation);
		});
	}
}

八、ExcelDynamicSelect

public interface ExcelDynamicSelect {
	/**
	 * 获取动态生成的下拉框可选数据
	 * @return 动态生成的下拉框可选数据
	 */
	String[] getSource();
}

九、ExcelSelectedResolve

@Data
@Slf4j
public class ExcelSelectedResolve {
	/**
	 * 下拉内容
	 */
	private String[] source;

	/**
	 * 设置下拉框的起始行,默认为第二行
	 */
	private int firstRow;

	/**
	 * 设置下拉框的结束行,默认为最后一行
	 */
	private int lastRow;

	public String[] resolveSelectedSource(ExcelSelected excelSelected) {
		if (excelSelected == null) {
			return null;
		}

		// 获取固定下拉框的内容
		String[] source = excelSelected.source();
		if (source.length > 0) {
			return source;
		}

		// 获取动态下拉框的内容
		Class<? extends ExcelDynamicSelect>[] classes = excelSelected.sourceClass();
		if (classes.length > 0) {
			try {
				ExcelDynamicSelect excelDynamicSelect = classes[0].newInstance();
				String[] dynamicSelectSource = excelDynamicSelect.getSource();
				if (dynamicSelectSource != null && dynamicSelectSource.length > 0) {
					return dynamicSelectSource;
				}
			} catch (InstantiationException | IllegalAccessException e) {
				log.error("解析动态下拉框数据异常", e);
			}
		}
		return null;
	}

}

十、导出接口

/** 教师入职Excel模板导出 */
	@ApiLog("教师入职Excel模板导出")
	@GetMapping("export-template")
	@ApiOperationSupport(order = 7)
	@ApiOperation(value = "教师入职Excel模板导出")
	public void exportTeacher(HttpServletResponse response, HttpServletRequest request) {
		String filename = "教师入职信息导入模板";
		try {
			String userAgent = request.getHeader("User-Agent");
			if (userAgent.contains("MSIE") || userAgent.contains("Trident")) {
				// 针对IE或者以IE为内核的浏览器:
				filename = java.net.URLEncoder.encode(filename, "UTF-8");
			} else {
				// 非IE浏览器的处理:
				filename = new String(filename.getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1);
			}
			response.setContentType("application/vnd.ms-excel");
			response.setHeader("Content-disposition", String.format("attachment; filename=\"%s\"", filename + Func.formatDateTime(new Date()) + ".xlsx"));
			response.setHeader("Cache-Control", "no-cache");
			response.setHeader("Pragma", "no-cache");
			response.setDateHeader("Expires", -1);
			response.setCharacterEncoding("UTF-8");

			ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream()).build();
			WriteSheet writeSheet = EasyExcelUtil.writeSelectedSheet(TeacherExcel.class, 0, "教师入职信息数据表");
			excelWriter.write(new ArrayList<String>(), writeSheet);
			excelWriter.finish();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

十一、导出效果图

完结,有问题欢迎指正,QQ 781999475

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