Easypoi map方式导入数据 ，List＜Map＜String, String＞＞ 日期项数据为空（null）解决办法
前言
在使用easypoi map的方式解析excel文件，若文件中的某列数据格式是日期类型，那么它这个工具是读取不到，因为它的源码读取到某列为日期格式，数据必须为字符串类型，它才会处理
switch (cell.getCellType()) {
case STRING:
result = cell.getRichStringCellValue() == null ? ""
: cell.getRichStringCellValue().getString();
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
if ("class java.lang.String".equals(classFullName)) {
result = formateDate(entity, cell.getDateCellValue());
}
} else {
result = readNumericCell(cell);
}
break;
case BOOLEAN:
result = Boolean.toString(cell.getBooleanCellValue());
break;
case BLANK:
break;
case ERROR:
break;
case FORMULA:
try {
result = readNumericCell(cell);
} catch (Exception e1) {
try {
result = cell.getRichStringCellValue() == null ? ""
: cell.getRichStringCellValue().getString();
} catch (Exception e2) {
throw new RuntimeException("获取公式类型的单元格失败", e2);
}
}
break;
default:
break;
}
解决办法
来个简单粗暴的，既然源码无法满足，那就直接扩展它的源码，在它 case NUMERIC 下加个任意类型都可以进去的判断方法，在项目main java包路径下定义一个跟源码一样的路径，一样的类，若那位大佬有更好的办法，还望留言指导一下呢
if("class java.lang.Object".equals(classFullName)){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
return format.format(cell.getDateCellValue());
}
main路径 java 路径下定义包路径
cn.afterturn.easypoi.excel.imports
处理类：
/**
* Copyright 2013-2015 JueYue (qrb.jueyue@gmail.com)
* <p>
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cn.afterturn.easypoi.excel.imports;
import cn.afterturn.easypoi.excel.entity.params.ExcelImportEntity;
import cn.afterturn.easypoi.excel.entity.sax.SaxReadCellEntity;
import cn.afterturn.easypoi.exception.excel.ExcelImportException;
import cn.afterturn.easypoi.exception.excel.enums.ExcelImportEnum;
import cn.afterturn.easypoi.handler.inter.IExcelDataHandler;
import cn.afterturn.easypoi.handler.inter.IExcelDictHandler;
import cn.afterturn.easypoi.util.PoiPublicUtil;
import cn.afterturn.easypoi.util.PoiReflectorUtil;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.DateUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.ZoneId;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Map;
/**
* Cell 取值服务
* 判断类型处理数据 1.判断Excel中的类型 2.根据replace替换值 3.handler处理数据 4.判断返回类型转化数据返回
*
* @author JueYue
* 2014年6月26日 下午10:42:28
*/
public class CellValueService {
private static final Logger LOGGER = LoggerFactory.getLogger(CellValueService.class);
private List<String> handlerList = null;
/**
* 获取单元格内的值
*
* @param cell
* @param entity
* @return
*/
private Object getCellValue(String classFullName, Cell cell, ExcelImportEntity entity) {
if (cell == null) {
return "";
}
Object result = null;
if ("class java.util.Date".equals(classFullName)
|| "class java.sql.Date".equals(classFullName)
|| ("class java.sql.Time").equals(classFullName)
|| ("class java.time.Instant").equals(classFullName)
|| ("class java.time.LocalDate").equals(classFullName)
|| ("class java.time.LocalDateTime").equals(classFullName)
|| ("class java.sql.Timestamp").equals(classFullName)) {
//FIX: 单元格yyyyMMdd数字时候使用 cell.getDateCellValue() 解析出的日期错误
if (CellType.NUMERIC == cell.getCellType() && DateUtil.isCellDateFormatted(cell)) {
result = DateUtil.getJavaDate(cell.getNumericCellValue());
} else {
String val = "";
try {
val = cell.getStringCellValue();
} catch (Exception e) {
return null;
}
result = getDateData(entity, val);
if (result == null) {
return null;
}
}
if (("class java.time.Instant").equals(classFullName)) {
result = ((Date) result).toInstant();
} else if (("class java.time.LocalDate").equals(classFullName)) {
result = ((Date) result).toInstant().atZone(ZoneId.systemDefault()).toLocalDate();
} else if (("class java.time.LocalDateTime").equals(classFullName)) {
result = ((Date) result).toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();
} else if (("class java.time.OffsetDateTime").equals(classFullName)) {
result = ((Date) result).toInstant().atZone(ZoneId.systemDefault()).toOffsetDateTime();
} else if (("class java.time.ZonedDateTime").equals(classFullName)) {
result = ((Date) result).toInstant().atZone(ZoneId.systemDefault());
} else if (("class java.sql.Date").equals(classFullName)) {
result = new java.sql.Date(((Date) result).getTime());
} else if (("class java.sql.Time").equals(classFullName)) {
result = new Time(((Date) result).getTime());
} else if (("class java.sql.Timestamp").equals(classFullName)) {
result = new Timestamp(((Date) result).getTime());
}
} else {
switch (cell.getCellType()) {
case STRING:
result = cell.getRichStringCellValue() == null ? ""
: cell.getRichStringCellValue().getString();
break;
case NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
if ("class java.lang.String".equals(classFullName)) {
result = formateDate(entity, cell.getDateCellValue());
}
if("class java.lang.Object".equals(classFullName)){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
return format.format(cell.getDateCellValue());
}
} else {
result = readNumericCell(cell);
}
break;
case BOOLEAN:
result = Boolean.toString(cell.getBooleanCellValue());
break;
case BLANK:
break;
case ERROR:
break;
case FORMULA:
try {
result = readNumericCell(cell);
} catch (Exception e1) {
try {
result = cell.getRichStringCellValue() == null ? ""
: cell.getRichStringCellValue().getString();
} catch (Exception e2) {
throw new RuntimeException("获取公式类型的单元格失败", e2);
}
}
break;
default:
break;
}
}
return result;
}
private Object readNumericCell(Cell cell) {
Object result = null;
double value = cell.getNumericCellValue();
if (((int) value) == value) {
result = (int) value;
} else {
result = value;
}
return result;
}
/**
* 获取日期类型数据
*
* @param entity
* @param value
* @return
* @author JueYue
* 2013年11月26日
*/
private Date getDateData(ExcelImportEntity entity, String value) {
if (StringUtils.isNotEmpty(entity.getFormat()) && StringUtils.isNotEmpty(value)) {
SimpleDateFormat format = new SimpleDateFormat(entity.getFormat());
try {
return format.parse(value);
} catch (ParseException e) {
try {
return DateUtil.getJavaDate(Double.parseDouble(value));
} catch (NumberFormatException ex) {
LOGGER.error("时间格式化失败,格式化:{},值:{}", entity.getFormat(), value);
throw new ExcelImportException(ExcelImportEnum.GET_VALUE_ERROR);
}
}
}
return null;
}
private String formateDate(ExcelImportEntity entity, Date value) {
if (StringUtils.isNotEmpty(entity.getFormat()) && value != null) {
SimpleDateFormat format = new SimpleDateFormat(entity.getFormat());
return format.format(value);
}
return null;
}
/**
* 获取cell的值
*
* @param object
* @param cell
* @param excelParams
* @param titleString
* @param dictHandler
*/
public Object getValue(IExcelDataHandler<?> dataHandler, Object object, Object cell,
Map<String, ExcelImportEntity> excelParams,
String titleString, IExcelDictHandler dictHandler) throws Exception {
ExcelImportEntity entity = excelParams.get(titleString);
String classFullName = "class java.lang.Object";
Class clazz = null;
if (!(object instanceof Map)) {
Method setMethod = entity.getMethods() != null && entity.getMethods().size() > 0
? entity.getMethods().get(entity.getMethods().size() - 1) : entity.getMethod();
Type[] ts = setMethod.getGenericParameterTypes();
classFullName = ts[0].toString();
clazz = (Class) ts[0];
}
Object result = null;
if(cell instanceof Cell){
result = getCellValue(classFullName, (Cell) cell, entity);
}else{
result = cell;
}
if (entity != null) {
result = handlerSuffix(entity.getSuffix(), result);
result = replaceValue(entity.getReplace(), result);
result = replaceValue(entity.getReplace(), result);
if (dictHandler != null && StringUtils.isNoneBlank(entity.getDict())) {
result = dictHandler.toValue(entity.getDict(), object, entity.getName(), result);
}
}
result = handlerValue(dataHandler, object, result, titleString);
return getValueByType(classFullName, result, entity, clazz);
}
/**
* 获取cell值
*
* @param dataHandler
* @param object
* @param cellEntity
* @param excelParams
* @param titleString
* @return
*/
public Object getValue(IExcelDataHandler<?> dataHandler, Object object,
SaxReadCellEntity cellEntity, Map<String, ExcelImportEntity> excelParams,
String titleString) {
ExcelImportEntity entity = excelParams.get(titleString);
Method setMethod = entity.getMethods() != null && entity.getMethods().size() > 0
? entity.getMethods().get(entity.getMethods().size() - 1) : entity.getMethod();
Type[] ts = setMethod.getGenericParameterTypes();
String classFullName = ts[0].toString();
Object result = cellEntity.getValue();
result = handlerSuffix(entity.getSuffix(), result);
result = replaceValue(entity.getReplace(), result);
result = handlerValue(dataHandler, object, result, titleString);
return getValueByType(classFullName, result, entity, (Class) ts[0]);
}
/**
* 把后缀删除掉
*
* @param result
* @param suffix
* @return
*/
private Object handlerSuffix(String suffix, Object result) {
if (StringUtils.isNotEmpty(suffix) && result != null
&& result.toString().endsWith(suffix)) {
String temp = result.toString();
return temp.substring(0, temp.length() - suffix.length());
}
return result;
}
/**
* 根据返回类型获取返回值
*
* @param classFullName
* @param result
* @param entity
* @param clazz
* @return
*/
private Object getValueByType(String classFullName, Object result, ExcelImportEntity entity, Class clazz) {
try {
//过滤空和空字符串,如果基本类型null会在上层抛出,这里就不处理了
if (result == null || StringUtils.isBlank(result.toString())) {
return null;
}
if ("class java.util.Date".equals(classFullName) && result instanceof String) {
return DateUtils.parseDate(result.toString(), entity.getFormat());
}
if ("class java.lang.Boolean".equals(classFullName) || "boolean".equals(classFullName)) {
return Boolean.valueOf(String.valueOf(result));
}
if ("class java.lang.Double".equals(classFullName) || "double".equals(classFullName)) {
return Double.valueOf(String.valueOf(result));
}
if ("class java.lang.Long".equals(classFullName) || "long".equals(classFullName)) {
try {
return Long.valueOf(String.valueOf(result));
} catch (Exception e) {
//格式错误的时候,就用double,然后获取Int值
return Double.valueOf(String.valueOf(result)).longValue();
}
}
if ("class java.lang.Float".equals(classFullName) || "float".equals(classFullName)) {
return Float.valueOf(String.valueOf(result));
}
if ("class java.lang.Integer".equals(classFullName) || "int".equals(classFullName)) {
try {
return Integer.valueOf(String.valueOf(result));
} catch (Exception e) {
//格式错误的时候,就用double,然后获取Int值
return Double.valueOf(String.valueOf(result)).intValue();
}
}
if ("class java.math.BigDecimal".equals(classFullName)) {
return new BigDecimal(String.valueOf(result));
}
if ("class java.lang.String".equals(classFullName)) {
//针对String 类型,但是Excel获取的数据却不是String,比如Double类型,防止科学计数法
if (result instanceof String) {
return result;
}
// double类型防止科学计数法
if (result instanceof Double) {
return PoiPublicUtil.doubleToString((Double) result);
}
return String.valueOf(result);
}
if (clazz != null && clazz.isEnum()) {
if (StringUtils.isNotEmpty(entity.getEnumImportMethod())) {
return PoiReflectorUtil.fromCache(clazz).execEnumStaticMethod(entity.getEnumImportMethod(), result);
} else {
return Enum.valueOf(clazz, result.toString());
}
}
return result;
} catch (Exception e) {
LOGGER.error(e.getMessage(), e);
throw new ExcelImportException(ExcelImportEnum.GET_VALUE_ERROR);
}
}
/**
* 调用处理接口处理值
*
* @param dataHandler
* @param object
* @param result
* @param titleString
* @return
*/
@SuppressWarnings({"unchecked", "rawtypes"})
private Object handlerValue(IExcelDataHandler dataHandler, Object object, Object result,
String titleString) {
if (dataHandler == null || dataHandler.getNeedHandlerFields() == null
|| dataHandler.getNeedHandlerFields().length == 0) {
return result;
}
if (handlerList == null) {
handlerList = Arrays.asList(dataHandler.getNeedHandlerFields());
}
if (handlerList.contains(titleString)) {
return dataHandler.importHandler(object, titleString, result);
}
return result;
}
/**
* 替换值
*
* @param replace
* @param result
* @return
*/
private Object replaceValue(String[] replace, Object result) {
if (replace != null && replace.length > 0) {
String temp = String.valueOf(result);
String[] tempArr;
for (int i = 0; i < replace.length; i++) {
tempArr = replace[i].split("_");
if (temp.equals(tempArr[0])) {
return tempArr[1];
}
}
}
return result;
}
}