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com.xiaoleilu.hutool.poi.excel.sax.Excel03SaxReader Maven / Gradle / Ivy

package com.xiaoleilu.hutool.poi.excel.sax;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.eventusermodel.EventWorkbookBuilder.SheetRecordCollectingListener;
import org.apache.poi.hssf.eventusermodel.FormatTrackingHSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;
import org.apache.poi.hssf.eventusermodel.HSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFRequest;
import org.apache.poi.hssf.eventusermodel.MissingRecordAwareHSSFListener;
import org.apache.poi.hssf.eventusermodel.dummyrecord.LastCellOfRowDummyRecord;
import org.apache.poi.hssf.eventusermodel.dummyrecord.MissingCellDummyRecord;
import org.apache.poi.hssf.model.HSSFFormulaParser;
import org.apache.poi.hssf.record.BOFRecord;
import org.apache.poi.hssf.record.BlankRecord;
import org.apache.poi.hssf.record.BoolErrRecord;
import org.apache.poi.hssf.record.BoundSheetRecord;
import org.apache.poi.hssf.record.FormulaRecord;
import org.apache.poi.hssf.record.LabelRecord;
import org.apache.poi.hssf.record.LabelSSTRecord;
import org.apache.poi.hssf.record.NumberRecord;
import org.apache.poi.hssf.record.Record;
import org.apache.poi.hssf.record.SSTRecord;
import org.apache.poi.hssf.record.StringRecord;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

import com.xiaoleilu.hutool.poi.excel.sax.handler.RowHandler;
import com.xiaoleilu.hutool.poi.exceptions.POIException;
import com.xiaoleilu.hutool.util.StrUtil;

/**
 * Excel2003格式的事件-用户模型方式读取器,在Hutool中,统一将此归类为Sax读取
* 参考:http://www.cnblogs.com/wshsdlau/p/5643862.html * * @author looly * */ public class Excel03SaxReader extends AbstractExcelSaxReader implements HSSFListener { /** 如果为公式,true表示输出公式计算后的结果值,false表示输出公式本身 */ private boolean isOutputFormulaValues = true; /** 用于解析公式 */ private SheetRecordCollectingListener workbookBuildingListener; /** 子工作簿,用于公式计算 */ private HSSFWorkbook stubWorkbook; /** 静态字符串表 */ private SSTRecord sstRecord; private FormatTrackingHSSFListener formatListener; /** Sheet边界记录,此Record中可以获得Sheet名 */ private List boundSheetRecords = new ArrayList<>(); private boolean isOutputNextStringRecord; // 存储行记录的容器 private List rowCellList = new ArrayList<>(); /** 自定义需要处理的sheet编号,如果-1表示处理所有sheet */ private int sheetIndex = -1; // 当前表索引 private int curSheetIndex = -1; private RowHandler rowHandler; /** * 构造 * * @param rowHandler 行处理器 */ public Excel03SaxReader(RowHandler rowHandler) { this.rowHandler = rowHandler; } // ------------------------------------------------------------------------------ Read start @Override public Excel03SaxReader read(File file, int sheetIndex) throws POIException { try { return read(new POIFSFileSystem(file), sheetIndex); } catch (IOException e) { throw new POIException(e); } } @Override public Excel03SaxReader read(InputStream excelStream, int sheetIndex) throws POIException { try { return read(new POIFSFileSystem(excelStream), sheetIndex); } catch (IOException e) { throw new POIException(e); } } /** * 读取 * * @param fs {@link POIFSFileSystem} * @param sheetIndex sheet序号 * @return this * @throws POIException IO异常包装 */ public Excel03SaxReader read(POIFSFileSystem fs, int sheetIndex) throws POIException { this.sheetIndex = sheetIndex; formatListener = new FormatTrackingHSSFListener(new MissingRecordAwareHSSFListener(this)); final HSSFRequest request = new HSSFRequest(); if (isOutputFormulaValues) { request.addListenerForAllRecords(formatListener); } else { workbookBuildingListener = new SheetRecordCollectingListener(formatListener); request.addListenerForAllRecords(workbookBuildingListener); } final HSSFEventFactory factory = new HSSFEventFactory(); try { factory.processWorkbookEvents(request, fs); } catch (IOException e) { throw new POIException(e); } return this; } // ------------------------------------------------------------------------------ Read end /** * 获得Sheet序号,如果处理所有sheet,获得最大的Sheet序号,从0开始 * * @return sheet序号 */ public int getSheetIndex() { return this.sheetIndex; } /** * 获得Sheet名,如果处理所有sheet,获得后一个Sheet名,从0开始 * * @return Sheet名 */ public String getSheetName() { if (this.boundSheetRecords.size() > this.sheetIndex) { return this.boundSheetRecords.get(this.sheetIndex > -1 ? this.sheetIndex : this.curSheetIndex).getSheetname(); } return null; } /** * HSSFListener 监听方法,处理 Record * * @param record 记录 */ @Override public void processRecord(Record record) { if (this.sheetIndex > -1 && this.curSheetIndex > this.sheetIndex) { // 指定Sheet之后的数据不再处理 return; } if (record instanceof BoundSheetRecord) { // Sheet边界记录,此Record中可以获得Sheet名 boundSheetRecords.add((BoundSheetRecord) record); } else if (record instanceof SSTRecord) { // 静态字符串表 sstRecord = (SSTRecord) record; } else if (record instanceof BOFRecord) { BOFRecord bofRecord = (BOFRecord) record; if (bofRecord.getType() == BOFRecord.TYPE_WORKSHEET) { // 如果有需要,则建立子工作薄 if (workbookBuildingListener != null && stubWorkbook == null) { stubWorkbook = workbookBuildingListener.getStubHSSFWorkbook(); } curSheetIndex++; } } else if (isProcessCurrentSheet()) { if (record instanceof MissingCellDummyRecord) { // 空值的操作 MissingCellDummyRecord mc = (MissingCellDummyRecord) record; rowCellList.add(mc.getColumn(), StrUtil.EMPTY); } else if (record instanceof LastCellOfRowDummyRecord) { // 行结束 processLastCell((LastCellOfRowDummyRecord) record); } else { // 处理单元格值 processCellValue(record); } } } // ---------------------------------------------------------------------------------------------- Private method start /** * 处理单元格值 * * @param record 单元格 */ private void processCellValue(Record record) { Object value = null; switch (record.getSid()) { case BlankRecord.sid: // 空白记录 BlankRecord brec = (BlankRecord) record; rowCellList.add(brec.getColumn(), StrUtil.EMPTY); break; case BoolErrRecord.sid: // 单元格为布尔类型 BoolErrRecord berec = (BoolErrRecord) record; rowCellList.add(berec.getColumn(), berec.getBooleanValue()); break; case FormulaRecord.sid: // 单元格为公式类型 FormulaRecord frec = (FormulaRecord) record; if (isOutputFormulaValues) { if (Double.isNaN(frec.getValue())) { // Formula result is a string // This is stored in the next record isOutputNextStringRecord = true; } else { value = formatListener.formatNumberDateCell(frec); } } else { value = '"' + HSSFFormulaParser.toFormulaString(stubWorkbook, frec.getParsedExpression()) + '"'; } rowCellList.add(frec.getColumn(), value); break; case StringRecord.sid:// 单元格中公式的字符串 if (isOutputNextStringRecord) { // String for formula StringRecord srec = (StringRecord) record; value = srec.getString(); isOutputNextStringRecord = false; } break; case LabelRecord.sid: LabelRecord lrec = (LabelRecord) record; this.rowCellList.add(lrec.getColumn(), value); break; case LabelSSTRecord.sid: // 单元格为字符串类型 LabelSSTRecord lsrec = (LabelSSTRecord) record; if (sstRecord == null) { rowCellList.add(lsrec.getColumn(), StrUtil.EMPTY); } else { value = sstRecord.getString(lsrec.getSSTIndex()).toString(); rowCellList.add(lsrec.getColumn(), value); } break; case NumberRecord.sid: // 单元格为数字类型 NumberRecord numrec = (NumberRecord) record; final String formatString = formatListener.getFormatString(numrec); if(formatString.contains(StrUtil.DOT)) { //浮点数 value = numrec.getValue(); }else if(formatString.contains(StrUtil.SLASH) || formatString.contains(StrUtil.COLON)) { //日期 value = formatListener.formatNumberDateCell(numrec); }else { //整型 value = (long)numrec.getValue(); } // 向容器加入列值 rowCellList.add(numrec.getColumn(), value); break; default: break; } } /** * 处理行结束后的操作,{@link LastCellOfRowDummyRecord}是行结束的标识Record * * @param lastCell 行结束的标识Record */ private void processLastCell(LastCellOfRowDummyRecord lastCell) { // 每行结束时, 调用handle() 方法 this.rowHandler.handle(curSheetIndex, lastCell.getRow(), this.rowCellList); // 清空行Cache this.rowCellList.clear(); } /** * 是否处理当前sheet * * @return 是否处理当前sheet */ private boolean isProcessCurrentSheet() { return this.sheetIndex < 0 || this.curSheetIndex == this.sheetIndex; } // ---------------------------------------------------------------------------------------------- Private method end }