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package cn.hutool.poi.excel.sax;

import cn.hutool.core.io.IORuntimeException;
import cn.hutool.core.io.IoUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.ReflectUtil;
import cn.hutool.core.util.StrUtil;
import cn.hutool.poi.excel.sax.handler.RowHandler;
import cn.hutool.poi.exceptions.POIException;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.openxml4j.opc.PackageAccess;
import org.apache.poi.xssf.eventusermodel.XSSFReader;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;

/**
 * Sax方式读取Excel文件
* Excel2007格式说明见:http://www.cnblogs.com/wangmingshun/p/6654143.html * * @author Looly * @since 3.1.2 */ public class Excel07SaxReader implements ExcelSaxReader { private final SheetDataSaxHandler handler; /** * 构造 * * @param rowHandler 行处理器 */ public Excel07SaxReader(RowHandler rowHandler) { this.handler = new SheetDataSaxHandler(rowHandler); } /** * 设置行处理器 * * @param rowHandler 行处理器 * @return this */ public Excel07SaxReader setRowHandler(RowHandler rowHandler) { this.handler.setRowHandler(rowHandler); return this; } // ------------------------------------------------------------------------------ Read start @Override public Excel07SaxReader read(File file, int rid) throws POIException { return read(file, RID_PREFIX + rid); } @Override public Excel07SaxReader read(File file, String idOrRidOrSheetName) throws POIException { try (OPCPackage open = OPCPackage.open(file, PackageAccess.READ)){ return read(open, idOrRidOrSheetName); } catch (InvalidFormatException | IOException e) { throw new POIException(e); } } @Override public Excel07SaxReader read(InputStream in, int rid) throws POIException { return read(in, RID_PREFIX + rid); } @Override public Excel07SaxReader read(InputStream in, String idOrRidOrSheetName) throws POIException { try (final OPCPackage opcPackage = OPCPackage.open(in)) { return read(opcPackage, idOrRidOrSheetName); } catch (IOException e) { throw new IORuntimeException(e); } catch (InvalidFormatException e) { throw new POIException(e); } } /** * 开始读取Excel,Sheet编号从0开始计数 * * @param opcPackage {@link OPCPackage},Excel包,读取后不关闭 * @param rid Excel中的sheet rid编号,如果为-1处理所有编号的sheet * @return this * @throws POIException POI异常 */ public Excel07SaxReader read(OPCPackage opcPackage, int rid) throws POIException { return read(opcPackage, RID_PREFIX + rid); } /** * 开始读取Excel,Sheet编号从0开始计数 * * @param opcPackage {@link OPCPackage},Excel包,读取后不关闭 * @param idOrRidOrSheetName Excel中的sheet id或者rid编号或sheet名,rid必须加rId前缀,例如rId1,如果为-1处理所有编号的sheet * @return this * @throws POIException POI异常 */ public Excel07SaxReader read(OPCPackage opcPackage, String idOrRidOrSheetName) throws POIException { try { return read(new XSSFReader(opcPackage), idOrRidOrSheetName); } catch (OpenXML4JException e) { throw new POIException(e); } catch (IOException e) { throw new IORuntimeException(e); } } /** * 开始读取Excel,Sheet编号从0开始计数 * * @param xssfReader {@link XSSFReader},Excel读取器 * @param idOrRidOrSheetName Excel中的sheet id或者rid编号或sheet名,rid必须加rId前缀,例如rId1,如果为-1处理所有编号的sheet * @return this * @throws POIException POI异常 * @since 5.4.4 */ public Excel07SaxReader read(XSSFReader xssfReader, String idOrRidOrSheetName) throws POIException { // 获取共享样式表,样式非必须 try { this.handler.stylesTable = xssfReader.getStylesTable(); } catch (IOException | InvalidFormatException ignore) { // ignore } // 获取共享字符串表 // POI-5.2.0开始返回值有所变更,导致实际使用时提示方法未找到,此处使用反射调用,解决不同版本返回值变更问题 //this.handler.sharedStrings = xssfReader.getSharedStringsTable(); this.handler.sharedStrings = ReflectUtil.invoke(xssfReader, "getSharedStringsTable"); return readSheets(xssfReader, idOrRidOrSheetName); } // ------------------------------------------------------------------------------ Read end // --------------------------------------------------------------------------------------- Private method start /** * 开始读取Excel,Sheet编号从0开始计数 * * @param xssfReader {@link XSSFReader},Excel读取器 * @param idOrRidOrSheetName Excel中的sheet id或者rid编号或sheet名,从0开始,rid必须加rId前缀,例如rId0,如果为-1处理所有编号的sheet * @return this * @throws POIException POI异常 * @since 5.4.4 */ private Excel07SaxReader readSheets(XSSFReader xssfReader, String idOrRidOrSheetName) throws POIException { this.handler.sheetIndex = getSheetIndex(xssfReader, idOrRidOrSheetName); InputStream sheetInputStream = null; try { if (this.handler.sheetIndex > -1) { // 根据 rId# 或 rSheet# 查找sheet sheetInputStream = xssfReader.getSheet(RID_PREFIX + (this.handler.sheetIndex + 1)); ExcelSaxUtil.readFrom(sheetInputStream, this.handler); this.handler.rowHandler.doAfterAllAnalysed(); } else { this.handler.sheetIndex = -1; // 遍历所有sheet final Iterator sheetInputStreams = xssfReader.getSheetsData(); while (sheetInputStreams.hasNext()) { // 重新读取一个sheet时行归零 this.handler.index = 0; this.handler.sheetIndex++; sheetInputStream = sheetInputStreams.next(); ExcelSaxUtil.readFrom(sheetInputStream, this.handler); this.handler.rowHandler.doAfterAllAnalysed(); } } } catch (RuntimeException e) { throw e; } catch (Exception e) { throw new POIException(e); } finally { IoUtil.close(sheetInputStream); } return this; } /** * 获取sheet索引,从0开始 *
    *
  • 传入'rId'开头,直接去除rId前缀
  • *
  • 传入纯数字,表示sheetIndex,通过{@link SheetRidReader}转换为rId
  • *
  • 传入其它字符串,表示sheetName,通过{@link SheetRidReader}转换为rId
  • *
* * @param xssfReader {@link XSSFReader},Excel读取器 * @param idOrRidOrSheetName Excel中的sheet id或者rid编号或sheet名称,从0开始,rid必须加rId前缀,例如rId0,如果为-1处理所有编号的sheet * @return sheet索引,从0开始 * @since 5.5.5 */ private int getSheetIndex(XSSFReader xssfReader, String idOrRidOrSheetName) { // rid直接处理 if (StrUtil.startWithIgnoreCase(idOrRidOrSheetName, RID_PREFIX)) { return Integer.parseInt(StrUtil.removePrefixIgnoreCase(idOrRidOrSheetName, RID_PREFIX)); } // sheetIndex需转换为rid final SheetRidReader ridReader = SheetRidReader.parse(xssfReader); if (StrUtil.startWithIgnoreCase(idOrRidOrSheetName, SHEET_NAME_PREFIX)) { // name:开头的被认为是sheet名称直接处理 idOrRidOrSheetName = StrUtil.removePrefixIgnoreCase(idOrRidOrSheetName, SHEET_NAME_PREFIX); final Integer rid = ridReader.getRidByNameBase0(idOrRidOrSheetName); if (null != rid) { return rid; } } else { // 尝试查找名称 Integer rid = ridReader.getRidByNameBase0(idOrRidOrSheetName); if (null != rid) { return rid; } try { final int sheetIndex = Integer.parseInt(idOrRidOrSheetName); rid = ridReader.getRidBySheetIdBase0(sheetIndex); // 如果查找不到对应index,则认为用户传入的直接是rid return ObjectUtil.defaultIfNull(rid, sheetIndex); } catch (NumberFormatException ignore) { // 非数字,说明非index,且没有对应名称,抛出异常 } } throw new IllegalArgumentException("Invalid rId or id or sheetName: " + idOrRidOrSheetName); } // --------------------------------------------------------------------------------------- Private method end }




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