java多线程导入excel的方法

<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.17</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.17</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml-schemas</artifactId> <version>3.17</version> </dependency>二、导入实现类

package com.supcon.mare.tankinfo.util;import com.alibaba.excel.util.StringUtils;import com.supcon.mare.common.util.exception.InterfaceException;import com.supcon.mare.tankinfo.constant.Constants;import com.supcon.mare.tankinfo.entity.TankAreaEntity;import com.supcon.mare.tankinfo.entity.TankMovementEntity;import com.supcon.mare.tankinfo.repository.TankAreaRepository;import org.apache.poi.ss.usermodel.Cell;import org.apache.poi.ss.usermodel.CellType;import org.apache.poi.ss.usermodel.Sheet;import java.util.*;import java.util.stream.Collectors;/** * @author: zhaoxu * @description: */public class ExcelThreadUtil implements Runnable { Sheet sheet; Integer rowIndex; List<String> rowNames; Integer size = 0; TankAreaRepository tankAreaRepository; ReflectUtil reflectUtil; public volatile static List<TankMovementEntity> tankMovementEntities = new ArrayList<>(); public void setExcelThreadAttr(Sheet sheet, Integer rowIndex, List<String> rowNames, Integer size, TankAreaRepository tankAreaRepository, ReflectUtil reflectUtil) {this.sheet = sheet;this.rowIndex = rowIndex;this.rowNames = rowNames;this.size = size;this.tankAreaRepository = tankAreaRepository;this.reflectUtil = reflectUtil; } @Override public void run() {int index = 0;while (sheet.getRow(rowIndex) != null && index < size) { TankMovementEntity tankMovementEntity = new TankMovementEntity(); Integer cellIndex = 0; List<String> units = new ArrayList(); Iterator<Cell> cellIterator = sheet.getRow(rowIndex).cellIterator(); while (cellIterator.hasNext()) {Cell cell = cellIterator.next();cell.setCellType(CellType.STRING);String rowName = rowNames.get(cellIndex++);try { //解析标题 judgeToParse(tankMovementEntity, rowName, cell, units, sheet);} catch (Exception e) { throw new InterfaceException(3414, '第' + (cell.getRowIndex() + 1) + '行，' + (cell.getColumnIndex() + 1) + '列发生错误：' + cell.toString());} } Boolean hasValue = false; try {Map<String, Object> fieldsValue = reflectUtil.getFieldsValue(TankMovementEntity.class, tankMovementEntity);Iterator<String> fieldKey = fieldsValue.keySet().iterator();//如果所有属性为空则不导入while (fieldKey.hasNext()) { String key = fieldKey.next(); Object value = fieldsValue.get(key); if (!'serialVersionUID'.equals(key) && !StringUtils.isEmpty(fieldsValue.get(key))) {hasValue = true;break; }}tankMovementEntity.setValid(1); } catch (IllegalAccessException e) {e.printStackTrace(); } rowIndex++; index++; if (!hasValue) {continue; } tankMovementEntity.setGmtCreate(Utils.getNowDate()); tankMovementEntity.setSupportAddPump(0); tankMovementEntity.setSupportDelPump(0); tankMovementEntity.setChangeTank(0); tankMovementEntity.setSupportUpdatePump(0); //解析单元号 if (units.size() > 1) {units.stream().forEach(unit -> { TankAreaEntity tankAreaEntity = tankAreaRepository.findByTankAreaCodeAndValid(unit, Constants.VALID_TRUE); if (tankAreaEntity == null && tankMovementEntity.getTankArea() == null) {tankAreaEntity = new TankAreaEntity();tankAreaEntity.setId(Long.valueOf(1));tankMovementEntity.setTankArea(tankAreaEntity); } List<String> unContainUnit = units.stream().filter(unit1 -> !unit1.equals(unit)).collect(Collectors.toList()); StringBuilder goalTankArea = new StringBuilder(); unContainUnit.stream().forEach(un -> goalTankArea.append(un + ',')); tankMovementEntity.setGoalTankArea(goalTankArea.substring(0, goalTankArea.lastIndexOf(','))); tankMovementEntity.setStrideTankarea(1);}); } else {TankAreaEntity tankAreaEntity = null;if (units.size() > 0) { tankAreaEntity = tankAreaRepository.findByTankAreaCodeAndValid(units.get(0), Constants.VALID_TRUE);}if (tankAreaEntity == null && tankMovementEntity.getTankArea() == null) { tankAreaEntity = new TankAreaEntity(); tankAreaEntity.setId(Long.valueOf(1));}tankMovementEntity.setTankArea(tankAreaEntity); } if (!StringUtils.isEmpty(tankMovementEntity.getGoalTankArea())) {tankMovementEntity.setStrideTankarea(1); } else {tankMovementEntity.setStrideTankarea(0); } synchronized (tankMovementEntities) {tankMovementEntities.add(tankMovementEntity); }} } public void judgeToParse(TankMovementEntity tankMovementEntity, String rowName, Cell cell, List<String> units, Sheet sheet) {String stringCellValue;if (Utils.isMergedRegion(sheet, cell.getRowIndex(), cell.getColumnIndex())) { stringCellValue = Utils.getMergedRegionValue(sheet, cell.getRowIndex(), cell.getColumnIndex()).replaceAll('n', ',');} else { stringCellValue = cell.getStringCellValue().replaceAll('n', ',');}if (StringUtils.isEmpty(stringCellValue)) { return;}//判断是否需要进行转换if (Constants.CONTINUITY.equals(stringCellValue)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, 0);} else if (Constants.BATCH.equals(stringCellValue)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, 1);} else if (Constants.YES.equals(stringCellValue)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, 1);} else if (Constants.NO.equals(stringCellValue)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, 0);} else if (Constants.PROVIDE.equals(stringCellValue)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, 1);} else if (Constants.UN_PROVIDE.equals(stringCellValue)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, 0);} else if (Constants.NA.equals(stringCellValue)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, null);} else if (Constants.SOURCE_DEVICE.equals(rowName) || Constants.PUMP_DEVICE.equals(rowName) || Constants.GOAL_DEVICE.equals(rowName) || Constants.VALVE_DEVICE.equals(rowName)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, stringCellValue);} else if ((Constants.TANK_AREA).equals(rowName)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, tankAreaRepository.findByTankAreaCodeAndValid(stringCellValue, Constants.VALID_TRUE));} else if ((Constants.SWITCH_TANK_SOURCE).equals(rowName)) { reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, '目的'.equals(stringCellValue) ? 1 : 0);} else if ((Constants.UNIT).equals(rowName)) { if (stringCellValue.contains(Constants.COMMA)) {String[] split = stringCellValue.split(',');units.addAll(Arrays.asList(split)); } else {units.add(stringCellValue); }} else { Class<?> aClass = null; try {//反射获取字段类型String typeName = TankMovementEntity.class.getDeclaredField(rowName).getGenericType().getTypeName();aClass = Class.forName(typeName); } catch (Exception e) {System.out.println(('未找到属性类型:' + rowName)); } if (aClass == Long.class) {reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, Long.valueOf(stringCellValue)); } else if (aClass == Integer.class || aClass == int.class) {if (Integer.valueOf(stringCellValue) > 1 && !rowName.equals(Constants.MAX_PUMP)) { throw new ClassCastException('解析错误');}reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, Integer.valueOf(stringCellValue)); } else {reflectUtil.setValue(TankMovementEntity.class, tankMovementEntity, rowName, stringCellValue); }} }}三、调用多线程

@Override@Transactional(isolation = Isolation.READ_COMMITTED, rollbackFor = Exception.class)public String importFromExcel(String fileString) throws IOException { Workbook workbook = null; File file = new File('D:Google下载' + fileString + '.xlsx'); InputStream is = new FileInputStream(file); if (file.getName().endsWith(Constants.XLSX)) {workbook = new XSSFWorkbook(is); } else if (file.getName().endsWith(Constants.XLS)) {workbook = new HSSFWorkbook(is); } Iterator<Sheet> sheetIterator = workbook.sheetIterator(); List<String> rowNames = new ArrayList<>(); while (sheetIterator.hasNext()) {Sheet sheet = sheetIterator.next();Iterator<Row> rowIterator = sheet.rowIterator();Integer rowIndex = 0;ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor((sheet.getLastRowNum() / readNumbers) + 1, (sheet.getLastRowNum() / readNumbers) + 2, 1000, TimeUnit.MILLISECONDS, new PriorityBlockingQueue<Runnable>(), Executors.defaultThreadFactory(), new ThreadPoolExecutor.AbortPolicy());while (rowIterator.hasNext()) { Row row = rowIterator.next(); //从第二行开始 if (rowIndex > 0) {Iterator<Cell> cellIterator = row.cellIterator();//第二行是标题if (rowIndex == 1) { //列遍历 while (cellIterator.hasNext()) {Cell next = cellIterator.next();next.setCellType(CellType.STRING);String stringCellValue = next.getStringCellValue();rowNames.add(stringCellValue.replaceAll('n', '')); }} else { Cell cell = row.getCell(0); cell.setCellType(CellType.STRING); if (StringUtils.isEmpty(cell.getStringCellValue())) {break; } if ((rowIndex - 2) % readNumbers == 0) {ExcelThreadUtil excelThreadUtil = new ExcelThreadUtil();if ((sheet.getLastRowNum() - rowIndex + 1 < readNumbers * 2 && sheet.getLastRowNum() - rowIndex + 1 > readNumbers)) { Integer size = sheet.getLastRowNum() - rowIndex + 1; excelThreadUtil.setExcelThreadAttr(sheet, rowIndex, rowNames, size, tankAreaRepository, reflectUtil); Future<?> future = threadPoolExecutor.submit(excelThreadUtil); try {future.get(); } catch (Exception e) {ExcelThreadUtil.tankMovementEntities.clear();throw new InterfaceException(3414, e.getMessage()); } break;}excelThreadUtil.setExcelThreadAttr(sheet, rowIndex, rowNames, readNumbers, tankAreaRepository, reflectUtil);Future<?> future = threadPoolExecutor.submit(excelThreadUtil);try { future.get();} catch (Exception e) { ExcelThreadUtil.tankMovementEntities.clear(); throw new InterfaceException(3414, e.getMessage());} }} } rowIndex++;}threadStop(threadPoolExecutor); } return 'true';}

判断线程是否都停止：

private void threadStop(ThreadPoolExecutor threadPoolExecutor) {while (true) { if (threadPoolExecutor.getActiveCount() == 0) {ExcelThreadUtil.tankMovementEntities.stream().forEach(tankMovement -> { tankMovement.setTaskDefineCode('move_' + String.valueOf((int) (Math.random() * (1600 - 1 + 1)) + 1) + System.currentTimeMillis()); String businessTypeName = tankMovement.getBusinessTypeCode(); EnumCodeEntity businessEnumEntity = enumCodeRepository.findByName(businessTypeName); tankMovement.setBusinessTypeCode(businessEnumEntity == null ? businessTypeName : businessEnumEntity.getTypeCode()); Integer random = (int) (Math.random() * (2 - 1 + 1)) + 1; tankMovement.setMaterialTypeCode(String.valueOf(random)); TankAreaEntity tankAreaEntity = new TankAreaEntity(); tankAreaEntity.setId(Long.valueOf((int) (Math.random() * (16 - 1 + 1)) + 1)); tankMovement.setTankArea(tankAreaEntity);});tankMovementRepository.saveAll(ExcelThreadUtil.tankMovementEntities);ExcelThreadUtil.tankMovementEntities.clear();break; }} }

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