EasyExcel实现导入excel

1.pom.xml配置依赖包

<!-- xls格式excel依赖包 -->
<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.17</version>
</dependency>
<!--xlsx格式excel依赖包-->
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.17</version>
</dependency>
<!-- easyexcel依赖包 -->
<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>1.1.2-beta5</version>
</dependency>

2.编写excel导入对应实体类

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;public class TestModel extends BaseRowModel {@ExcelProperty(value = "姓名", index = 0)private String xm;@ExcelProperty(value = "微信号", index = 1)private String wxh;@ExcelProperty(value = "手机号", index = 2)private String sjh;public String getXm() {return xm;}public void setXm(String xm) {this.xm = xm;}public String getWxh() {return wxh;}public void setWxh(String wxh) {this.wxh = wxh;}public String getSjh() {return sjh;}public void setSjh(String sjh) {this.sjh = sjh;}}

3.编写导入监听类

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.metadata.ExcelHeadProperty;public class ExcelListener extends AnalysisEventListener {//自定义用于暂时存储dataprivate List<Object> datas = new ArrayList<>();//导入表头private String importHeads = "";//模版表头private String modelHeads = "";/*** 通过 AnalysisContext 对象还可以获取当前 sheet，当前行等数据*/@Overridepublic void invoke(Object o, AnalysisContext analysisContext) {Integer currentRowNum = analysisContext.getCurrentRowNum();//获取导入表头，默认第一行为表头if(currentRowNum == 0){try {Map<String,Object> m = objToMap(o);for (Object v : m.values()) {importHeads += String.valueOf(v).trim() + ",";}} catch (Exception e) {e.printStackTrace();}}else{datas.add(o);}}/*** 读取完之后的操作*/@Overridepublic void doAfterAllAnalysed(AnalysisContext analysisContext) {//获取模版表头ExcelHeadProperty ehp = analysisContext.getExcelHeadProperty();for(List<String> s : ehp.getHead()){modelHeads += s.get(0) + ",";}}public List<Object> getDatas() {return datas;}public void setDatas(List<Object> datas) {this.datas = datas;}public String getImportHeads() {return importHeads;}public void setImportHeads(String importHeads) {this.importHeads = importHeads;}public String getModelHeads() {return modelHeads;}public void setModelHeads(String modelHeads) {this.modelHeads = modelHeads;}//Object转换为Mappublic  Map<String,Object> objToMap(Object obj) throws Exception{Map<String,Object> map = new LinkedHashMap<String, Object>();Field[] fields = obj.getClass().getDeclaredFields();for(Field field : fields){field.setAccessible(true);map.put(field.getName(), field.get(obj));}return map;}
}

4.编写导入工具类

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;import org.springframework.web.multipart.MultipartFile;import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;public class EasyExcelUtil {/*** 读取某个 sheet 的 Excel** @param excel    文件* @param rowModel 实体类映射，继承 BaseRowModel 类* @param sheetNo  sheet 的序号 从1开始* @return Excel 数据 list*/public static List<Object> readExcel(MultipartFile excel, BaseRowModel rowModel) throws IOException {return readExcel(excel, rowModel, 1, 1);}/*** 读取某个 sheet 的 Excel* @param excel       文件* @param rowModel    实体类映射，继承 BaseRowModel 类* @param sheetNo     sheet 的序号 从1开始* @return Excel 数据 list*/public static Map<String,Object> readExcel(MultipartFile excel, BaseRowModel rowModel, int sheetNo) throws IOException {Map<String,Object> result = new HashMap<>();ExcelListener excelListener = new ExcelListener();ExcelReader reader = getReader(excel, excelListener);if (reader == null) {return null;}reader.read(new Sheet(sheetNo, 0, rowModel.getClass()));    //校验表头Boolean flag = false;if(excelListener.getImportHeads().equals(excelListener.getModelHeads())){flag = true;}result.put("flag", flag);result.put("datas", excelListener.getDatas());return result;}/*** 读取某个 sheet 的 Excel* @param excel       文件* @param rowModel    实体类映射，继承 BaseRowModel 类* @param sheetNo     sheet 的序号 从1开始* @param headLineNum 表头行数，默认为1* @return Excel 数据 list*/public static List<Object> readExcel(MultipartFile excel, BaseRowModel rowModel, int sheetNo, int headLineNum) throws IOException {ExcelListener excelListener = new ExcelListener();ExcelReader reader = getReader(excel, excelListener);if (reader == null) {return null;}reader.read(new Sheet(sheetNo, headLineNum, rowModel.getClass()));return excelListener.getDatas();}/*** 读取指定sheetName的Excel(多个 sheet)* @param excel    文件* @param rowModel 实体类映射，继承 BaseRowModel 类* @return Excel 数据 list* @throws IOException */public static List<Object> readExcel(MultipartFile excel, BaseRowModel rowModel,String sheetName) throws IOException {ExcelListener excelListener = new ExcelListener();ExcelReader reader = getReader(excel, excelListener);if (reader == null) {return null;}for (Sheet sheet : reader.getSheets()) {if (rowModel != null) {sheet.setClazz(rowModel.getClass());}//读取指定名称的sheetif(sheet.getSheetName().contains(sheetName)){reader.read(sheet);break;}}return excelListener.getDatas();}/*** 返回 ExcelReader* @param excel 需要解析的 Excel 文件* @param excelListener new ExcelListener()* @throws IOException */private static ExcelReader getReader(MultipartFile excel,ExcelListener excelListener) throws IOException {String filename = excel.getOriginalFilename();if(filename != null && (filename.toLowerCase().endsWith(".xls") || filename.toLowerCase().endsWith(".xlsx"))){InputStream is = new BufferedInputStream(excel.getInputStream());return new ExcelReader(is, null, excelListener, false);}else{return null;}}}

5.业务层调用

//导入excel
@RequestMapping(value = "excelImport", method = {RequestMethod.GET, RequestMethod.POST })
public String excelImport(HttpServletRequest request,Model model,@RequestParam("uploadFile") MultipartFile[] files) throws Exception {       if(files != null && files.length > 0){MultipartFile file = files[0];Map<String,Object> result = EasyExcelUtil.readExcel(file, new TestModel(),1);Boolean flag = (Boolean) result.get("flag");if(flag){List<Object> list = (List<Object>) result.get("datas");    if(list != null && list.size() > 0){for(Object o : list){TestModel xfxx = (TestModel) o;System.out.println(xfxx.getXm()+"/"+xfxx.getSjh()+"/"+xfxx.getSjh());}}}else{System.out.println("表头格式错误");}}  return "index";
}

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