1.maven

        <!-- Excel --><dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>3.3.1</version></dependency>

2.默认使用

            List<CrmInvestmentImport> crmInvestmentImportList = EasyExcel.read(FileConfig.Path + importJobAvg.getFilePath()).head(CrmInvestmentImport.class).sheet("Sheet1").doReadSync();

         指定导入excel中指定列名对应字段

@Data
public class CrmInvestmentImport {@ExcelProperty("来源")private String client_source;@ExcelProperty("省")private String province;
}

3.自定导入-匹配注解标签中指定的任意一个

        当有多个导入模板时,一个字段title对应多个excel中的列名,比如模板1中的标题,模板2中的故障代码,模板3中的测试项目;这种方式默认是不支持的,需要自定义匹配标签中的任意一个.

@Data
public class QualityIssuesImport {//region 标准部分@ExcelProperty("行号（必填）")private String line_no;@ExcelProperty("单据类型")private String order_type;//单据类型，客诉/实验室品质/制程品质/售后品质@ExcelProperty({"标题（必填）", "故障代码", "测试项目"})private String title;//问题
}

        自定义监听器EasyExcelCustomListener

package mis.shared.config;import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.exception.ExcelAnalysisException;
import org.springframework.util.StringUtils;import java.lang.reflect.Field;
import java.util.*;public class EasyExcelCustomListener extends AnalysisEventListener<Map<Integer, String>> {private Map<String, Integer> fieldValue = new HashMap<>();public List<Object> list = new ArrayList<>();private Map<Integer, String> headMap;public Class<?> classType;public EasyExcelCustomListener() {}public EasyExcelCustomListener(Class<?> classType) {this.classType = classType;}/*** 数据表头获取，表头位置对应*/@Overridepublic void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {this.headMap = headMap;fieldValue.putAll(fieldValueSet(headMap, classType));super.invokeHeadMap(headMap, context);}/*** 数据一条一条解析*/@Overridepublic void invoke(Map<Integer, String> data, AnalysisContext analysisContext) {if (fieldValue.isEmpty()) {throw new ExcelAnalysisException("模板错误");}Object obj = null;try {obj = classType.newInstance();} catch (InstantiationException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();}setFieldValue(data, fieldValue, obj);list.add(obj);}@Overridepublic void doAfterAllAnalysed(AnalysisContext context) {}/*** 根据表头获取列所在位置* 匹配注解ExcelProperty指定的任意一个,原生的不支持** @param headMap 表头map* @param cla     对应解析类*/public static Map<String, Integer> fieldValueSet(Map<Integer, String> headMap, Class<?> cla) {Map<String, Integer> fieldValue = new HashMap<>();Field[] fields = cla.getDeclaredFields();for (Field field : fields) {//遍历每个属性if (field.isAnnotationPresent(ExcelProperty.class)) {ExcelProperty excelProperty = field.getAnnotation(ExcelProperty.class);for (Map.Entry<Integer, String> entry : headMap.entrySet()) {if (entry == null || !StringUtils.hasLength(entry.getValue())) {continue;}String headValue = entry.getValue();//兼容阿里巴巴全部匹配,原始数据if (Arrays.asList(excelProperty.value()).contains(headValue)) {fieldValue.put(field.getName(), entry.getKey());break;}//去掉空格、换行符后再匹配headValue = entry.getValue().replace(" ", "").replace("\n", "");if (Arrays.asList(excelProperty.value()).contains(headValue)) {fieldValue.put(field.getName(), entry.getKey());break;}}}}return fieldValue;}/*** 字段值赋值** @param valueMap   值对应所在位置* @param obj        实体类* @param fieldValue 表头对应所在位置*/public static void setFieldValue(Map<Integer, String> valueMap, Map<String, Integer> fieldValue, Object obj) {Field[] fields = obj.getClass().getDeclaredFields();for (Field field : fields) {//遍历每个属性if (field.isAnnotationPresent(ExcelProperty.class) && fieldValue.containsKey(field.getName())) {field.setAccessible(true);try {Class<?> fieldType = field.getType();String value = valueMap.get(fieldValue.get(field.getName()));field.set(obj, stringToTarget(value, fieldType));} catch (Exception e) {e.printStackTrace();}}}}//String转换为指定类型public static Object stringToTarget(String string, Class<?> t) throws Exception {boolean nullOrEmpty = !StringUtils.hasLength(string);if (String.class.equals(t)) {return string;}if (double.class.equals(t)) {return nullOrEmpty ? 0 : Double.parseDouble(string);} else if (long.class.equals(t)) {return nullOrEmpty ? 0 : Long.parseLong(string);} else if (int.class.equals(t)) {return nullOrEmpty ? 0 : Integer.parseInt(string);} else if (float.class.equals(t)) {return nullOrEmpty ? 0 : Float.parseFloat(string);} else if (short.class.equals(t)) {return nullOrEmpty ? 0 : Short.parseShort(string);} else if (boolean.class.equals(t)) {return nullOrEmpty ? 0 : Boolean.parseBoolean(string);} else if (Number.class.isAssignableFrom(t)) {return t.getConstructor(String.class).newInstance(nullOrEmpty ? "0" : string);} else {return nullOrEmpty ? "" : t.getConstructor(String.class).newInstance(string);}}public List<Object> getList() {return list;}public Map<Integer, String> getHeadMap() {return this.headMap;}
}

        兼容多种模板的自定义导入主代码

           EasyExcelCustomListener easyExcelCustomListener = new EasyExcelCustomListener(QualityIssuesImport.class);ExcelReader excelReader = EasyExcel.read(FileConfig.Path + importJobAvg.getFilePath()).build();ReadSheet readSheet = EasyExcel.readSheet("Sheet1").registerReadListener(easyExcelCustomListener).build();excelReader.read(readSheet);excelReader.finish();excelReader.close();List<Object> qualityIssuesList = easyExcelCustomListener.getList();