!345 增加Excel导出表格时级联下拉选项功能

* fixed(Excel工具类重载):
* fixed(字典接口耦合问题):
* fixed(调整接口):
* fixed(切换条件不正确):
* feat(优化注解|反向解析失效):
* feat(增加注释|编写Demo|修复bug):
* feat(Excel导出附带有下拉框):
This commit is contained in:
Emil.Zhang 2023-05-13 14:17:59 +00:00 committed by 疯狂的狮子Li
parent 21570cbd33
commit 72882374be
11 changed files with 1106 additions and 13 deletions

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@ -37,14 +37,34 @@ public class ExcelEnumConvert implements Converter<Object> {
@Override @Override
public Object convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) { public Object convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) {
Object codeValue = cellData.getData(); cellData.checkEmpty();
// Excel中填入的是枚举中指定的描述
Object textValue = null;
switch (cellData.getType()) {
case STRING:
case DIRECT_STRING:
case RICH_TEXT_STRING:
textValue = cellData.getStringValue();
break;
case NUMBER:
textValue = cellData.getNumberValue();
break;
case BOOLEAN:
textValue = cellData.getBooleanValue();
break;
}
// 如果是空值 // 如果是空值
if (ObjectUtil.isNull(codeValue)) { if (ObjectUtil.isNull(textValue)) {
return null; return null;
} }
Map<Object, String> enumValueMap = beforeConvert(contentProperty); Map<Object, String> enumCodeToTextMap = beforeConvert(contentProperty);
String textValue = enumValueMap.get(codeValue); // 从Java输出至Excel是code转text
return Convert.convert(contentProperty.getField().getType(), textValue); // 因此从Excel转Java应该将text与code对调
Map<Object, Object> enumTextToCodeMap = new HashMap<>();
enumCodeToTextMap.forEach((key, value) -> enumTextToCodeMap.put(value, key));
// 应该从text -> code中查找
Object codeValue = enumTextToCodeMap.get(textValue);
return Convert.convert(contentProperty.getField().getType(), codeValue);
} }
@Override @Override

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@ -1,5 +1,7 @@
package com.ruoyi.common.core.service; package com.ruoyi.common.core.service;
import java.util.Map;
/** /**
* 通用 字典服务 * 通用 字典服务
* *
@ -54,4 +56,11 @@ public interface DictService {
*/ */
String getDictValue(String dictType, String dictLabel, String separator); String getDictValue(String dictType, String dictLabel, String separator);
/**
* 获取字典下所有的字典值与标签
*
* @param dictType 字典类型
* @return dictValue为keydictLabel为值组成的Map
*/
Map<String, String> getAllDictByDictType(String dictType);
} }

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@ -0,0 +1,91 @@
package com.ruoyi.common.excel;
import cn.hutool.core.util.StrUtil;
import com.ruoyi.common.exception.ServiceException;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* <h1>Excel下拉可选项</h1>
* 注意为确保下拉框解析正确传值务必使用createOptionValue()做为值的拼接
*
* @author Emil.Zhang
*/
@Data
@AllArgsConstructor
@NoArgsConstructor
@SuppressWarnings("unused")
public class DropDownOptions {
/**
* 一级下拉所在列index从0开始算
*/
private int index = 0;
/**
* 二级下拉所在的index从0开始算不能与一级相同
*/
private int nextIndex = 0;
/**
* 一级下拉所包含的数据
*/
private List<String> options = new ArrayList<>();
/**
* 二级下拉所包含的数据Map
* <p>以每一个一级选项值为Key每个一级选项对应的二级数据为Value</p>
*/
private Map<String, List<String>> nextOptions = new HashMap<>();
/**
* 分隔符
*/
private static final String DELIMITER = "_";
/**
* 创建只有一级的下拉选
*/
public DropDownOptions(int index, List<String> options) {
this.index = index;
this.options = options;
}
/**
* <h2>创建每个选项可选值</h2>
* <p>注意不能以数字特殊符号开头选项中不可以包含任何运算符号</p>
*
* @param vars 可选值内包含的参数
* @return 合规的可选值
*/
public static String createOptionValue(Object... vars) {
StringBuilder stringBuffer = new StringBuilder();
String regex = "^[\\S\\d\\u4e00-\\u9fa5]+$";
for (int i = 0; i < vars.length; i++) {
Object var = vars[i];
if (!var.toString().matches(regex)) {
throw new ServiceException("选项数据不符合规则,仅允许使用中英文字符以及数字");
}
stringBuffer.append(StrUtil.trimToEmpty(var.toString()));
if (i < vars.length - 1) {
// 直至最后一个前都以_作为切割线
stringBuffer.append(DELIMITER);
}
}
if (stringBuffer.toString().matches("^\\d_*$")) {
throw new ServiceException("禁止以数字开头");
}
return stringBuffer.toString();
}
/**
* 将处理后合理的可选值解析为原始的参数
*
* @param option 经过处理后的合理的可选项
* @return 原始的参数
*/
public static List<String> analyzeOptionValue(String option) {
return StrUtil.split(option, DELIMITER, true, true);
}
}

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@ -0,0 +1,391 @@
package com.ruoyi.common.excel;
import cn.hutool.core.util.EnumUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.write.handler.SheetWriteHandler;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder;
import com.ruoyi.common.annotation.ExcelDictFormat;
import com.ruoyi.common.annotation.ExcelEnumFormat;
import com.ruoyi.common.core.service.DictService;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.utils.spring.SpringUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.ss.util.WorkbookUtil;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
import java.lang.reflect.Field;
import java.util.*;
import java.util.stream.Collectors;
/**
* <h1>Excel表格下拉选操作</h1>
* 考虑到下拉选过多可能导致Excel打开缓慢的问题只校验前1000行
* <p>
* 即只有前1000行的数据可以用下拉框超出的自行通过限制数据量的形式第二次输出
*
* @author Emil.Zhang
*/
@Slf4j
public class ExcelDownHandler implements SheetWriteHandler {
/**
* Excel表格中的列名英文
* 仅为了解析列英文禁止修改
*/
private static final String EXCEL_COLUMN_NAME = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
/**
* 单选数据Sheet名
*/
private static final String OPTIONS_SHEET_NAME = "options";
/**
* 联动选择数据Sheet名的头
*/
private static final String LINKED_OPTIONS_SHEET_NAME = "linkedOptions";
/**
* 下拉可选项
*/
private final List<DropDownOptions> dropDownOptions;
/**
* 当前单选进度
*/
private int currentOptionsColumnIndex;
/**
* 当前联动选择进度
*/
private int currentLinkedOptionsSheetIndex;
private final DictService dictService;
public ExcelDownHandler(List<DropDownOptions> options) {
this.dropDownOptions = options;
this.currentOptionsColumnIndex = 0;
this.currentLinkedOptionsSheetIndex = 0;
this.dictService = SpringUtils.getBean(DictService.class);
}
/**
* <h2>开始创建下拉数据</h2>
* 1.通过解析传入的@ExcelProperty同级是否标注有@DropDown选项
* 如果有且设置了value值则将其直接置为下拉可选项
* <p>
* 2.或者在调用ExcelUtil时指定了可选项将依据传入的可选项做下拉
* <p>
* 3.二者并存注意调用方式
*/
@Override
public void afterSheetCreate(WriteWorkbookHolder writeWorkbookHolder, WriteSheetHolder writeSheetHolder) {
Sheet sheet = writeSheetHolder.getSheet();
// 开始设置下拉框 HSSFWorkbook
DataValidationHelper helper = sheet.getDataValidationHelper();
Field[] fields = writeWorkbookHolder.getClazz().getDeclaredFields();
Workbook workbook = writeWorkbookHolder.getWorkbook();
int length = fields.length;
for (int i = 0; i < length; i++) {
// 循环实体中的每个属性
// 可选的下拉值
List<String> options = new ArrayList<>();
if (fields[i].isAnnotationPresent(ExcelDictFormat.class)) {
// 如果指定了@ExcelDictFormat则使用字典的逻辑
ExcelDictFormat thisFiledExcelDictFormat = fields[i].getDeclaredAnnotation(ExcelDictFormat.class);
String dictType = thisFiledExcelDictFormat.dictType();
String converterExp = thisFiledExcelDictFormat.readConverterExp();
if (StrUtil.isNotBlank(dictType)) {
// 如果传递了字典名则依据字典建立下拉
options =
new ArrayList<>(
Optional.ofNullable(dictService.getAllDictByDictType(dictType))
.orElseThrow(() -> new ServiceException(String.format("字典 %s 不存在", dictType)))
.values()
);
} else if (StrUtil.isNotBlank(converterExp)) {
// 如果指定了确切的值则直接解析确切的值
options = StrUtil.split(
converterExp,
thisFiledExcelDictFormat.separator(),
true,
true);
}
} else if (fields[i].isAnnotationPresent(ExcelEnumFormat.class)) {
// 否则如果指定了@ExcelEnumFormat则使用枚举的逻辑
ExcelEnumFormat thisFiledExcelEnumFormat = fields[i].getDeclaredAnnotation(ExcelEnumFormat.class);
options =
EnumUtil
.getFieldValues(
thisFiledExcelEnumFormat.enumClass(),
thisFiledExcelEnumFormat.textField()
)
.stream()
.map(String::valueOf)
.collect(Collectors.toList());
}
if (ObjectUtil.isNotEmpty(options)) {
// 仅当下拉可选项不为空时执行
// 获取列下标默认为当前循环次数
int index = i;
if (fields[i].isAnnotationPresent(ExcelProperty.class)) {
// 如果指定了列下标以指定的为主
index = fields[i].getDeclaredAnnotation(ExcelProperty.class).index();
}
if (options.size() > 20) {
// 这里限制如果可选项大于20则使用额外表形式
dropDownWithSheet(helper, workbook, sheet, index, options);
} else {
// 否则使用固定值形式
dropDownWithSimple(helper, sheet, index, options);
}
}
}
dropDownOptions.forEach(everyOptions -> {
// 如果传递了下拉框选择器参数
if (!everyOptions.getNextOptions().isEmpty()) {
// 当二级选项不为空时使用额外关联表的形式
dropDownLinkedOptions(helper, workbook, sheet, everyOptions);
} else if (everyOptions.getOptions().size() > 10) {
// 当一级选项参数个数大于10使用额外表的形式
dropDownWithSheet(helper, workbook, sheet, everyOptions.getIndex(), everyOptions.getOptions());
} else if (everyOptions.getOptions().size() != 0) {
// 当一级选项个数不为空使用默认形式
dropDownWithSimple(helper, sheet, everyOptions.getIndex(), everyOptions.getOptions());
}
});
}
/**
* <h2>简单下拉框</h2>
* 直接将可选项拼接为指定列的数据校验值
*
* @param celIndex 列index
* @param value 下拉选可选值
*/
private void dropDownWithSimple(DataValidationHelper helper, Sheet sheet, Integer celIndex, List<String> value) {
if (ObjectUtil.isEmpty(value)) {
return;
}
this.markOptionsToSheet(helper, sheet, celIndex, helper.createExplicitListConstraint(value.toArray(new String[0])));
}
/**
* <h2>额外表格形式的级联下拉框</h2>
*
* @param options 额外表格形式存储的下拉可选项
*/
private void dropDownLinkedOptions(DataValidationHelper helper, Workbook workbook, Sheet sheet, DropDownOptions options) {
String linkedOptionsSheetName = String.format("%s_%d", LINKED_OPTIONS_SHEET_NAME, currentLinkedOptionsSheetIndex);
// 创建联动下拉数据表
Sheet linkedOptionsDataSheet = workbook.createSheet(WorkbookUtil.createSafeSheetName(linkedOptionsSheetName));
// 将下拉表隐藏
workbook.setSheetHidden(workbook.getSheetIndex(linkedOptionsDataSheet), true);
// 完善横向的一级选项数据表
List<String> firstOptions = options.getOptions();
Map<String, List<String>> secoundOptionsMap = options.getNextOptions();
// 创建名称管理器
Name name = workbook.createName();
// 设置名称管理器的别名
name.setNameName(linkedOptionsSheetName);
// 以横向第一行创建一级下拉拼接引用位置
String firstOptionsFunction = String.format("%s!$%s$1:$%s$1",
linkedOptionsSheetName,
getExcelColumnName(0),
getExcelColumnName(firstOptions.size())
);
// 设置名称管理器的引用位置
name.setRefersToFormula(firstOptionsFunction);
// 设置数据校验为序列模式引用的是名称管理器中的别名
this.markOptionsToSheet(helper, sheet, options.getIndex(), helper.createFormulaListConstraint(linkedOptionsSheetName));
for (int columIndex = 0; columIndex < firstOptions.size(); columIndex++) {
// 先提取主表中一级下拉的列名
String firstOptionsColumnName = getExcelColumnName(columIndex);
// 一次循环是每一个一级选项
int finalI = columIndex;
// 本次循环的一级选项值
String thisFirstOptionsValue = firstOptions.get(columIndex);
// 创建第一行的数据
Optional
// 获取第一行
.ofNullable(linkedOptionsDataSheet.getRow(0))
// 如果不存在则创建第一行
.orElseGet(() -> linkedOptionsDataSheet.createRow(finalI))
// 第一行当前列
.createCell(columIndex)
// 设置值为当前一级选项值
.setCellValue(thisFirstOptionsValue);
// 第二行开始设置第二级别选项参数
List<String> secondOptions = secoundOptionsMap.get(thisFirstOptionsValue);
if (ObjectUtil.isEmpty(secondOptions)) {
// 必须保证至少有一个关联选项否则将导致Excel解析错误
secondOptions = Collections.singletonList("暂无_0");
}
// 以该一级选项值创建子名称管理器
Name sonName = workbook.createName();
// 设置名称管理器的别名
sonName.setNameName(thisFirstOptionsValue);
// 以第二行该列数据拼接引用位置
String sonFunction = String.format("%s!$%s$2:$%s$%d",
linkedOptionsSheetName,
firstOptionsColumnName,
firstOptionsColumnName,
secondOptions.size() + 1
);
// 设置名称管理器的引用位置
sonName.setRefersToFormula(sonFunction);
// 数据验证为序列模式引用到每一个主表中的二级选项位置
// 创建子项的名称管理器只是为了使得Excel可以识别到数据
String mainSheetFirstOptionsColumnName = getExcelColumnName(options.getIndex());
for (int i = 0; i < 100; i++) {
// 以一级选项对应的主体所在位置创建二级下拉
String secondOptionsFunction = String.format("=INDIRECT(%s%d)", mainSheetFirstOptionsColumnName, i + 1);
// 二级只能主表每一行的每一列添加二级校验
markLinkedOptionsToSheet(helper, sheet, i, options.getNextIndex(), helper.createFormulaListConstraint(secondOptionsFunction));
}
for (int rowIndex = 0; rowIndex < secondOptions.size(); rowIndex++) {
// 从第二行开始填充二级选项
int finalRowIndex = rowIndex + 1;
int finalColumIndex = columIndex;
Row row = Optional
.ofNullable(linkedOptionsDataSheet.getRow(finalRowIndex))
// 没有则创建
.orElseGet(() -> linkedOptionsDataSheet.createRow(finalRowIndex));
Optional
// 在本级一级选项所在的列
.ofNullable(row.getCell(finalColumIndex))
// 不存在则创建
.orElseGet(() -> row.createCell(finalColumIndex))
// 设置二级选项值
.setCellValue(secondOptions.get(rowIndex));
}
}
currentLinkedOptionsSheetIndex++;
}
/**
* <h2>额外表格形式的普通下拉框</h2>
* 由于下拉框可选值数量过多为提升Excel打开效率使用额外表格形式做下拉
*
* @param celIndex 下拉选
* @param value 下拉选可选值
*/
private void dropDownWithSheet(DataValidationHelper helper, Workbook workbook, Sheet sheet, Integer celIndex, List<String> value) {
// 创建下拉数据表
Sheet simpleDataSheet = Optional.ofNullable(workbook.getSheet(WorkbookUtil.createSafeSheetName(OPTIONS_SHEET_NAME)))
.orElseGet(() -> workbook.createSheet(WorkbookUtil.createSafeSheetName(OPTIONS_SHEET_NAME)));
// 将下拉表隐藏
workbook.setSheetHidden(workbook.getSheetIndex(simpleDataSheet), true);
// 完善纵向的一级选项数据表
for (int i = 0; i < value.size(); i++) {
int finalI = i;
// 获取每一选项行如果没有则创建
Row row = Optional.ofNullable(simpleDataSheet.getRow(i))
.orElseGet(() -> simpleDataSheet.createRow(finalI));
// 获取本级选项对应的选项列如果没有则创建
Cell cell = Optional.ofNullable(row.getCell(currentOptionsColumnIndex))
.orElseGet(() -> row.createCell(currentOptionsColumnIndex));
// 设置值
cell.setCellValue(value.get(i));
}
// 创建名称管理器
Name name = workbook.createName();
// 设置名称管理器的别名
String nameName = String.format("%s_%d", OPTIONS_SHEET_NAME, celIndex);
name.setNameName(nameName);
// 以纵向第一列创建一级下拉拼接引用位置
String function = String.format("%s!$%s$1:$%s$%d",
OPTIONS_SHEET_NAME,
getExcelColumnName(currentOptionsColumnIndex),
getExcelColumnName(currentOptionsColumnIndex),
value.size());
// 设置名称管理器的引用位置
name.setRefersToFormula(function);
// 设置数据校验为序列模式引用的是名称管理器中的别名
this.markOptionsToSheet(helper, sheet, celIndex, helper.createFormulaListConstraint(nameName));
currentOptionsColumnIndex++;
}
/**
* 挂载下拉的列仅限一级选项
*/
private void markOptionsToSheet(DataValidationHelper helper,
Sheet sheet,
Integer celIndex,
DataValidationConstraint constraint) {
// 设置数据有效性加载在哪个单元格上,四个参数分别是起始行终止行起始列终止列
CellRangeAddressList addressList = new CellRangeAddressList(1, 1000, celIndex, celIndex);
markDataValidationToSheet(helper, sheet, constraint, addressList);
}
/**
* 挂载下拉的列仅限二级选项
*/
private void markLinkedOptionsToSheet(DataValidationHelper helper,
Sheet sheet,
Integer rowIndex,
Integer celIndex,
DataValidationConstraint constraint) {
// 设置数据有效性加载在哪个单元格上,四个参数分别是起始行终止行起始列终止列
CellRangeAddressList addressList = new CellRangeAddressList(rowIndex, rowIndex, celIndex, celIndex);
markDataValidationToSheet(helper, sheet, constraint, addressList);
}
/**
* 应用数据校验
*/
private void markDataValidationToSheet(DataValidationHelper helper,
Sheet sheet,
DataValidationConstraint constraint,
CellRangeAddressList addressList) {
// 数据有效性对象
DataValidation dataValidation = helper.createValidation(constraint, addressList);
// 处理Excel兼容性问题
if (dataValidation instanceof XSSFDataValidation) {
//数据校验
dataValidation.setSuppressDropDownArrow(true);
//错误提示
dataValidation.setErrorStyle(DataValidation.ErrorStyle.STOP);
dataValidation.createErrorBox("提示", "此值与单元格定义数据不一致");
dataValidation.setShowErrorBox(true);
//选定提示
dataValidation.createPromptBox("填写说明:", "填写内容只能为下拉中数据,其他数据将导致导入失败");
dataValidation.setShowPromptBox(true);
sheet.addValidationData(dataValidation);
} else {
dataValidation.setSuppressDropDownArrow(false);
}
sheet.addValidationData(dataValidation);
}
/**
* <h2>依据列index获取列名英文</h2>
* 依据列index转换为Excel中的列名英文
* <p>例如第1列index为0解析出来为A列</p>
* 第27列index为26解析为AA列
* <p>第28列index为27解析为AB列</p>
*
* @param columnIndex 列index
* @return 列index所在得英文名
*/
private String getExcelColumnName(int columnIndex) {
// 26一循环的次数
int columnCircleCount = columnIndex / 26;
// 26一循环内的位置
int thisCircleColumnIndex = columnIndex % 26;
// 26一循环的次数大于0则视为栏名至少两位
String columnPrefix = columnCircleCount == 0
? ""
: StrUtil.subWithLength(EXCEL_COLUMN_NAME, columnCircleCount - 1, 1);
// 从26一循环内取对应的栏位名
String columnNext = StrUtil.subWithLength(EXCEL_COLUMN_NAME, thisCircleColumnIndex, 1);
// 将二者拼接即为最终的栏位名
return columnPrefix + columnNext;
}
}

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@ -11,10 +11,7 @@ import com.alibaba.excel.write.metadata.fill.FillConfig;
import com.alibaba.excel.write.metadata.fill.FillWrapper; import com.alibaba.excel.write.metadata.fill.FillWrapper;
import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy; import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
import com.ruoyi.common.convert.ExcelBigNumberConvert; import com.ruoyi.common.convert.ExcelBigNumberConvert;
import com.ruoyi.common.excel.CellMergeStrategy; import com.ruoyi.common.excel.*;
import com.ruoyi.common.excel.DefaultExcelListener;
import com.ruoyi.common.excel.ExcelListener;
import com.ruoyi.common.excel.ExcelResult;
import com.ruoyi.common.utils.StringUtils; import com.ruoyi.common.utils.StringUtils;
import com.ruoyi.common.utils.file.FileUtils; import com.ruoyi.common.utils.file.FileUtils;
import lombok.AccessLevel; import lombok.AccessLevel;
@ -94,6 +91,25 @@ public class ExcelUtil {
} }
} }
/**
* 导出excel
*
* @param list 导出数据集合
* @param sheetName 工作表的名称
* @param clazz 实体类
* @param response 响应体
* @param options 级联下拉选
*/
public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, HttpServletResponse response, List<DropDownOptions> options) {
try {
resetResponse(sheetName, response);
ServletOutputStream os = response.getOutputStream();
exportExcel(list, sheetName, clazz, false, os, options);
} catch (IOException e) {
throw new RuntimeException("导出Excel异常");
}
}
/** /**
* 导出excel * 导出excel
* *
@ -113,6 +129,26 @@ public class ExcelUtil {
} }
} }
/**
* 导出excel
*
* @param list 导出数据集合
* @param sheetName 工作表的名称
* @param clazz 实体类
* @param merge 是否合并单元格
* @param response 响应体
* @param options 级联下拉选
*/
public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, boolean merge, HttpServletResponse response, List<DropDownOptions> options) {
try {
resetResponse(sheetName, response);
ServletOutputStream os = response.getOutputStream();
exportExcel(list, sheetName, clazz, merge, os, options);
} catch (IOException e) {
throw new RuntimeException("导出Excel异常");
}
}
/** /**
* 导出excel * 导出excel
* *
@ -125,6 +161,19 @@ public class ExcelUtil {
exportExcel(list, sheetName, clazz, false, os); exportExcel(list, sheetName, clazz, false, os);
} }
/**
* 导出excel
*
* @param list 导出数据集合
* @param sheetName 工作表的名称
* @param clazz 实体类
* @param os 输出流
* @param options 级联下拉选内容
*/
public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, OutputStream os, List<DropDownOptions> options) {
exportExcel(list, sheetName, clazz, false, os, options);
}
/** /**
* 导出excel * 导出excel
* *
@ -149,6 +198,29 @@ public class ExcelUtil {
builder.doWrite(list); builder.doWrite(list);
} }
/**
* 导出带有下拉框的Excel表格
*
* @param options 下拉框数据
*/
public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz,
boolean merge, OutputStream os, List<DropDownOptions> options) {
ExcelWriterSheetBuilder builder = EasyExcel.write(os, clazz)
.autoCloseStream(false)
// 自动适配
.registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
// 大数值自动转换 防止失真
.registerConverter(new ExcelBigNumberConvert())
// 添加下拉框操作
.registerWriteHandler(new ExcelDownHandler(options))
.sheet(sheetName);
if (merge) {
// 合并处理器
builder.registerWriteHandler(new CellMergeStrategy(list, true));
}
builder.doWrite(list);
}
/** /**
* 单表多数据模板导出 模板格式为 {.属性} * 单表多数据模板导出 模板格式为 {.属性}
* *

View File

@ -1,12 +1,18 @@
package com.ruoyi.demo.controller; package com.ruoyi.demo.controller;
import cn.dev33.satoken.annotation.SaIgnore;
import cn.hutool.core.collection.CollUtil; import cn.hutool.core.collection.CollUtil;
import com.ruoyi.common.excel.ExcelResult;
import com.ruoyi.common.utils.poi.ExcelUtil; import com.ruoyi.common.utils.poi.ExcelUtil;
import com.ruoyi.demo.domain.vo.ExportDemoVo;
import com.ruoyi.demo.listener.ExportDemoListener;
import com.ruoyi.demo.service.IExportExcelService;
import lombok.AllArgsConstructor; import lombok.AllArgsConstructor;
import lombok.Data; import lombok.Data;
import org.springframework.web.bind.annotation.GetMapping; import lombok.RequiredArgsConstructor;
import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.RestController; import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList; import java.util.ArrayList;
@ -20,9 +26,12 @@ import java.util.Map;
* @author Lion Li * @author Lion Li
*/ */
@RestController @RestController
@RequiredArgsConstructor
@RequestMapping("/demo/excel") @RequestMapping("/demo/excel")
public class TestExcelController { public class TestExcelController {
private final IExportExcelService exportExcelService;
/** /**
* 单列表多数据 * 单列表多数据
*/ */
@ -76,6 +85,28 @@ public class TestExcelController {
ExcelUtil.exportTemplateMultiList(multiListMap, "多列表.xlsx", "excel/多列表.xlsx", response); ExcelUtil.exportTemplateMultiList(multiListMap, "多列表.xlsx", "excel/多列表.xlsx", response);
} }
/**
* 导出下拉框
*
* @param response /
*/
@SaIgnore
@GetMapping("/exportWithOptions")
public void exportWithOptions(HttpServletResponse response) {
exportExcelService.exportWithOptions(response);
}
/**
* 导入表格
*/
@SaIgnore
@PostMapping(value = "/importWithOptions", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public List<ExportDemoVo> importWithOptions(@RequestPart("file") MultipartFile file) throws Exception {
// 处理解析结果
ExcelResult<ExportDemoVo> excelResult = ExcelUtil.importExcel(file.getInputStream(), ExportDemoVo.class, new ExportDemoListener());
return excelResult.getList();
}
@Data @Data
@AllArgsConstructor @AllArgsConstructor
static class TestObj1 { static class TestObj1 {

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@ -0,0 +1,119 @@
package com.ruoyi.demo.domain.vo;
import com.alibaba.excel.annotation.ExcelIgnoreUnannotated;
import com.alibaba.excel.annotation.ExcelProperty;
import com.ruoyi.common.annotation.ExcelDictFormat;
import com.ruoyi.common.annotation.ExcelEnumFormat;
import com.ruoyi.common.convert.ExcelDictConvert;
import com.ruoyi.common.convert.ExcelEnumConvert;
import com.ruoyi.common.core.validate.AddGroup;
import com.ruoyi.common.core.validate.EditGroup;
import com.ruoyi.common.enums.UserStatus;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import javax.validation.constraints.NotEmpty;
import javax.validation.constraints.NotNull;
/**
* 带有下拉选的Excel导出
*
* @author Emil.Zhang
*/
@Data
@ExcelIgnoreUnannotated
@AllArgsConstructor
@NoArgsConstructor
public class ExportDemoVo {
private static final long serialVersionUID = 1L;
/**
* 用户昵称
*/
@ExcelProperty(value = "用户名", index = 0)
@NotEmpty(message = "用户名不能为空", groups = AddGroup.class)
private String nickName;
/**
* 用户类型
* </p>
* 使用ExcelEnumFormat注解需要进行下拉选的部分
*/
@ExcelProperty(value = "用户类型", index = 1, converter = ExcelEnumConvert.class)
@ExcelEnumFormat(enumClass = UserStatus.class, textField = "info")
@NotEmpty(message = "用户类型不能为空", groups = AddGroup.class)
private String userStatus;
/**
* 性别
* <p>
* 使用ExcelDictFormat注解需要进行下拉选的部分
*/
@ExcelProperty(value = "性别", index = 2, converter = ExcelDictConvert.class)
@ExcelDictFormat(dictType = "sys_user_sex")
@NotEmpty(message = "性别不能为空", groups = AddGroup.class)
private String gender;
/**
* 手机号
*/
@ExcelProperty(value = "手机号", index = 3)
@NotEmpty(message = "手机号不能为空", groups = AddGroup.class)
private String phoneNumber;
/**
* Email
*/
@ExcelProperty(value = "Email", index = 4)
@NotEmpty(message = "Email不能为空", groups = AddGroup.class)
private String email;
/**
*
* <p>
* 级联下拉仅判断是否选了
*/
@ExcelProperty(value = "", index = 5)
@NotNull(message = "省不能为空", groups = AddGroup.class)
private String province;
/**
* 数据库中的省ID
* </p>
* 处理完毕后再判断是否市正确的值
*/
@NotNull(message = "请勿手动输入", groups = EditGroup.class)
private Integer provinceId;
/**
*
* <p>
* 级联下拉
*/
@ExcelProperty(value = "", index = 6)
@NotNull(message = "市不能为空", groups = AddGroup.class)
private String city;
/**
* 数据库中的市ID
*/
@NotNull(message = "请勿手动输入", groups = EditGroup.class)
private Integer cityId;
/**
*
* <p>
* 级联下拉
*/
@ExcelProperty(value = "", index = 7)
@NotNull(message = "县不能为空", groups = AddGroup.class)
private String area;
/**
* 数据库中的县ID
*/
@NotNull(message = "请勿手动输入", groups = EditGroup.class)
private Integer areaId;
}

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@ -0,0 +1,68 @@
package com.ruoyi.demo.listener;
import cn.hutool.core.util.NumberUtil;
import com.alibaba.excel.context.AnalysisContext;
import com.ruoyi.common.core.validate.AddGroup;
import com.ruoyi.common.core.validate.EditGroup;
import com.ruoyi.common.excel.DefaultExcelListener;
import com.ruoyi.common.excel.DropDownOptions;
import com.ruoyi.common.utils.ValidatorUtils;
import com.ruoyi.demo.domain.vo.ExportDemoVo;
import java.util.List;
/**
* Excel带下拉框的解析处理器
*
* @author Emil.Zhang
*/
public class ExportDemoListener extends DefaultExcelListener<ExportDemoVo> {
public ExportDemoListener() {
// 显示使用构造函数否则将导致空指针
super(true);
}
@Override
public void invoke(ExportDemoVo data, AnalysisContext context) {
// 先校验必填
ValidatorUtils.validate(data, AddGroup.class);
// 处理级联下拉的部分
String province = data.getProvince();
String city = data.getCity();
String area = data.getArea();
// 本行用户选择的省
List<String> thisRowSelectedProvinceOption = DropDownOptions.analyzeOptionValue(province);
if (thisRowSelectedProvinceOption.size() == 2) {
String provinceIdStr = thisRowSelectedProvinceOption.get(1);
if (NumberUtil.isNumber(provinceIdStr)) {
// 严格要求数据的话可以在这里做与数据库相关的判断
// 例如判断省信息是否在数据库中存在等建议结合RedisCache做缓存10s减少数据库调用
data.setProvinceId(Integer.parseInt(provinceIdStr));
}
}
// 本行用户选择的市
List<String> thisRowSelectedCityOption = DropDownOptions.analyzeOptionValue(city);
if (thisRowSelectedCityOption.size() == 2) {
String cityIdStr = thisRowSelectedCityOption.get(1);
if (NumberUtil.isNumber(cityIdStr)) {
data.setCityId(Integer.parseInt(cityIdStr));
}
}
// 本行用户选择的县
List<String> thisRowSelectedAreaOption = DropDownOptions.analyzeOptionValue(area);
if (thisRowSelectedAreaOption.size() == 2) {
String areaIdStr = thisRowSelectedAreaOption.get(1);
if (NumberUtil.isNumber(areaIdStr)) {
data.setAreaId(Integer.parseInt(areaIdStr));
}
}
// 处理完毕以后判断是否符合规则
ValidatorUtils.validate(data, EditGroup.class);
// 添加到处理结果中
getExcelResult().getList().add(data);
}
}

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@ -0,0 +1,18 @@
package com.ruoyi.demo.service;
import javax.servlet.http.HttpServletResponse;
/**
* 导出下拉框Excel示例
*
* @author Emil.Zhang
*/
public interface IExportExcelService {
/**
* 导出下拉框
*
* @param response /
*/
void exportWithOptions(HttpServletResponse response);
}

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@ -0,0 +1,262 @@
package com.ruoyi.demo.service.impl;
import com.ruoyi.common.enums.UserStatus;
import com.ruoyi.common.excel.DropDownOptions;
import com.ruoyi.common.utils.poi.ExcelUtil;
import com.ruoyi.demo.domain.vo.ExportDemoVo;
import com.ruoyi.demo.service.IExportExcelService;
import lombok.Data;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;
import javax.servlet.http.HttpServletResponse;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
* 导出下拉框Excel示例
*
* @author Emil.Zhang
*/
@Service
@RequiredArgsConstructor
public class ExportExcelServiceImpl implements IExportExcelService {
@Override
public void exportWithOptions(HttpServletResponse response) {
// 创建表格数据业务中一般通过数据库查询
List<ExportDemoVo> excelDataList = new ArrayList<>();
for (int i = 0; i < 3; i++) {
// 模拟数据库中的一条数据
ExportDemoVo everyRowData = new ExportDemoVo();
everyRowData.setNickName("用户-" + i);
everyRowData.setUserStatus(UserStatus.OK.getCode());
everyRowData.setGender("1");
everyRowData.setPhoneNumber(String.format("175%08d", i));
everyRowData.setEmail(String.format("175%08d", i) + "@163.com");
everyRowData.setProvinceId(i);
everyRowData.setCityId(i);
everyRowData.setAreaId(i);
excelDataList.add(everyRowData);
}
// 通过@ExcelIgnoreUnannotated配合@ExcelProperty合理显示需要的列
// 并通过@DropDown注解指定下拉值或者通过创建ExcelOptions来指定下拉框
// 使用ExcelOptions时建议指定列index防止出现下拉列解析不对齐
// 首先从数据库中查询下拉框内的可选项
// 这里模拟查询结果
List<DemoCityData> provinceList = getProvinceList();
List<DemoCityData> cityList = getCityList(provinceList);
List<DemoCityData> areaList = getAreaList(cityList);
// 把所有的结果提取为规范的下拉选可选项
// 规范的一级省用于级联省-
List<String> provinceOptions =
provinceList.stream()
.map(everyProvince ->
DropDownOptions.createOptionValue(
everyProvince.getName(),
everyProvince.getId()
))
.collect(Collectors.toList());
// 规范的二级市用于级联省-
Map<String, List<String>> provinceToCityOptions = new HashMap<>();
cityList.stream()
.collect(Collectors.groupingBy(DemoCityData::getPData))
.forEach((province, thisProvinceCityList) -> {
// 每个省下二级的市可选项
provinceToCityOptions.put(
DropDownOptions.createOptionValue(province.getName(), province.getId()),
thisProvinceCityList.stream()
.map(everyCity ->
DropDownOptions.createOptionValue(everyCity.getName(), everyCity.getId())
)
.collect(Collectors.toList())
);
});
// 规范的一级市用于级联市-
List<String> cityOptions = cityList.stream()
.map(everyCity ->
DropDownOptions.createOptionValue(
everyCity.getName(),
everyCity.getId()
))
.collect(Collectors.toList());
// 规范的二级县用于级联市-
Map<String, List<String>> cityToAreaOptions = new HashMap<>();
areaList.stream()
.collect(Collectors.groupingBy(DemoCityData::getPData))
.forEach((city, thisCityAreaList) -> {
// 每个市下二级的县可选项
cityToAreaOptions.put(
DropDownOptions.createOptionValue(city.getName(), city.getId()),
thisCityAreaList.stream()
.map(everyArea ->
DropDownOptions.createOptionValue(everyArea.getName(), everyArea.getId())
)
.collect(Collectors.toList())
);
});
// 因为省市县三个都是联动省级联市市级联县因此需要创建两个级联下拉分别以省和市为判断依据创建
// 创建省-市级联
DropDownOptions provinceToCity = new DropDownOptions();
// 以省为一级
provinceToCity.setIndex(5);
// 以市为二级
provinceToCity.setNextIndex(6);
// 补充省的内容以及市的内容
provinceToCity.setOptions(provinceOptions);
provinceToCity.setNextOptions(provinceToCityOptions);
// 创建市-县级联
DropDownOptions cityToArea = new DropDownOptions();
cityToArea.setIndex(6);
cityToArea.setNextIndex(7);
cityToArea.setOptions(cityOptions);
cityToArea.setNextOptions(cityToAreaOptions);
// 把所有的下拉框存储
List<DropDownOptions> options = new ArrayList<>();
options.add(provinceToCity);
options.add(cityToArea);
// 到此为止所有的下拉框可选项已全部配置完毕
// 接下来需要将Excel中的展示数据转换为对应的下拉选
List<ExportDemoVo> outList = excelDataList.stream().map(everyRowData -> {
// 只需要处理没有使用@ExcelDictFormat注解的下拉框
// 一般来说可以直接在数据库查询即查询出省市县信息这里通过模拟操作赋值
everyRowData.setProvince(buildOptions(provinceList, everyRowData.getProvinceId()));
everyRowData.setCity(buildOptions(cityList, everyRowData.getCityId()));
everyRowData.setArea(buildOptions(areaList, everyRowData.getAreaId()));
return everyRowData;
}).collect(Collectors.toList());
ExcelUtil.exportExcel(outList, "下拉框示例", ExportDemoVo.class, response, options);
}
private String buildOptions(List<DemoCityData> cityDataList, Integer id) {
Map<Integer, List<DemoCityData>> groupByIdMap =
cityDataList.stream().collect(Collectors.groupingBy(DemoCityData::getId));
if (groupByIdMap.containsKey(id)) {
DemoCityData demoCityData = groupByIdMap.get(id).get(0);
return DropDownOptions.createOptionValue(demoCityData.getName(), demoCityData.getId());
} else {
return "";
}
}
/**
* 模拟查询数据库操作
*
* @return /
*/
private List<DemoCityData> getProvinceList() {
List<DemoCityData> provinceList = new ArrayList<>();
// 实际业务中一般采用数据库读取的形式这里直接拼接创建
provinceList.add(new DemoCityData(0, null, "安徽省"));
provinceList.add(new DemoCityData(1, null, "江苏省"));
return provinceList;
}
/**
* 模拟查找数据库操作需要连带查询出省的数据
*
* @param provinceList 模拟的父省数据
* @return /
*/
private List<DemoCityData> getCityList(List<DemoCityData> provinceList) {
List<DemoCityData> cityList = new ArrayList<>();
// 实际业务中一般采用数据库读取的形式这里直接拼接创建
cityList.add(new DemoCityData(0, 0, "合肥市"));
cityList.add(new DemoCityData(1, 0, "芜湖市"));
cityList.add(new DemoCityData(2, 1, "南京市"));
cityList.add(new DemoCityData(3, 1, "无锡市"));
cityList.add(new DemoCityData(4, 1, "徐州市"));
selectParentData(provinceList, cityList);
return cityList;
}
/**
* 模拟查找数据库操作需要连带查询出市的数据
*
* @param cityList 模拟的父市数据
* @return /
*/
private List<DemoCityData> getAreaList(List<DemoCityData> cityList) {
List<DemoCityData> areaList = new ArrayList<>();
// 实际业务中一般采用数据库读取的形式这里直接拼接创建
areaList.add(new DemoCityData(0, 0, "瑶海区"));
areaList.add(new DemoCityData(1, 0, "庐江区"));
areaList.add(new DemoCityData(2, 1, "南宁县"));
areaList.add(new DemoCityData(3, 1, "镜湖区"));
areaList.add(new DemoCityData(4, 2, "玄武区"));
areaList.add(new DemoCityData(5, 2, "秦淮区"));
areaList.add(new DemoCityData(6, 3, "宜兴市"));
areaList.add(new DemoCityData(7, 3, "新吴区"));
areaList.add(new DemoCityData(8, 4, "鼓楼区"));
areaList.add(new DemoCityData(9, 4, "丰县"));
selectParentData(cityList, areaList);
return areaList;
}
/**
* 模拟数据库的查询父数据操作
*
* @param parentList /
* @param sonList /
*/
private void selectParentData(List<DemoCityData> parentList, List<DemoCityData> sonList) {
Map<Integer, List<DemoCityData>> parentGroupByIdMap =
parentList.stream().collect(Collectors.groupingBy(DemoCityData::getId));
sonList.forEach(everySon -> {
if (parentGroupByIdMap.containsKey(everySon.getPid())) {
everySon.setPData(parentGroupByIdMap.get(everySon.getPid()).get(0));
}
});
}
/**
* 模拟的数据库省市县
*/
@Data
private static class DemoCityData {
/**
* 数据库id字段
*/
private Integer id;
/**
* 数据库pid字段
*/
private Integer pid;
/**
* 数据库name字段
*/
private String name;
/**
* MyBatisPlus连带查询父数据
*/
private DemoCityData pData;
public DemoCityData(Integer id, Integer pid, String name) {
this.id = id;
this.pid = pid;
this.name = name;
}
}
}

View File

@ -279,4 +279,16 @@ public class SysDictTypeServiceImpl implements ISysDictTypeService, DictService
} }
} }
@Override
public Map<String, String> getAllDictByDictType(String dictType) {
List<SysDictData> thisDictTypeDataList = selectDictDataByType(dictType);
Map<String, String> dictMap = null;
for (SysDictData everyDictData : thisDictTypeDataList) {
if (ObjectUtil.isNull(dictMap)) {
dictMap = new HashMap<>();
}
dictMap.put(everyDictData.getDictValue(), everyDictData.getDictLabel());
}
return dictMap;
}
} }