Excel 2007 底层实现方式

一、EXCEL的底层实现

能力有限，了解的比较浅，有不足之处望指正，首先看下图：

一、 excel2007是使用xml格式来存储的，把一个excel文件后缀改为.zip,打开之后就直接可以看到一个excel文件对应的xml格式的文件了。

1.1、docProps目录

1.1.1、 core.xml文件

<?xml version="1.0" encoding="utf-8"?>
<cp:coreProperties xmlns:cp="http://schemas.openxmlformats.org/package/2006/metadata/core-properties" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dcmitype="http://purl.org/dc/dcmitype/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><!-- 创建人 --><dc:creator>Administrator</dc:creator><!-- 最后修改人 --><cp:lastModifiedBy>Administrator</cp:lastModifiedBy><!-- 创建时间 --><dcterms:created xsi:type="dcterms:W3CDTF">2008-09-11T17:22:52Z</dcterms:created><!-- 修改时间 --><dcterms:modified xsi:type="dcterms:W3CDTF">2017-03-31T15:29:39Z</dcterms:modified>
</cp:coreProperties>

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1.1.2、 app.xml文件

<?xml version="1.0" encoding="utf-8"?>
<Properties xmlns="http://schemas.openxmlformats.org/officeDocument/2006/extended-properties" xmlns:vt="http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes"><!-- 文档类型 --><Application>Microsoft Excel</Application><!-- 是否加密 --><DocSecurity>0</DocSecurity><ScaleCrop>false</ScaleCrop><HeadingPairs><vt:vector size="2" baseType="variant"><vt:variant><vt:lpstr>工作表</vt:lpstr></vt:variant><vt:variant><vt:i4>3</vt:i4></vt:variant></vt:vector></HeadingPairs><TitlesOfParts><vt:vector size="3" baseType="lpstr"><vt:lpstr>Sheet1</vt:lpstr><vt:lpstr>Sheet2</vt:lpstr><vt:lpstr>Sheet3</vt:lpstr></vt:vector></TitlesOfParts><Company/><LinksUpToDate>false</LinksUpToDate><!-- 是否共享 --><SharedDoc>false</SharedDoc><HyperlinksChanged>false</HyperlinksChanged><!-- 版本 --><AppVersion>12.0000</AppVersion>
</Properties>

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1.2、 xl目录，该目录保存的就是excel中的详细内容了

1.2.1、workbook.xml文件

　　文件包含一对<sheets>标签，其中的每个<sheet>元素都代表Excel 2007文件中的一个sheet，工作表的名称就是其name属性的值，这里有三个sheet

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<workbook xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><fileVersion appName="xl" lastEdited="4" lowestEdited="4" rupBuild="4506"/><workbookPr defaultThemeVersion="124226"/><bookViews><workbookView xWindow="0" yWindow="105" windowWidth="12765" windowHeight="5715"/></bookViews><sheets><sheet name="Sheet1" sheetId="1" r:id="rId1"/><sheet name="Sheet2" sheetId="2" r:id="rId2"/><sheet name="Sheet3" sheetId="3" r:id="rId3"/></sheets><calcPr calcId="125725"/>
</workbook>

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1.2.2、 _rels/workbook.xml.rels

　　定义每个sheetid对应的sheet内容文件sheet1.xml，共享的单元格内容文件sharedstring.xml,样式文件style.xml是当前单元格的样式字体，颜色等样式的xml配置。

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Relationships xmlns="http://schemas.openxmlformats.org/package/2006/relationships"><Relationship Id="rId3" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet3.xml"/><Relationship Id="rId2" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet2.xml"/><Relationship Id="rId1" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/worksheet" Target="worksheets/sheet1.xml"/><Relationship Id="rId6" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/sharedStrings" Target="sharedStrings.xml"/><Relationship Id="rId5" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles" Target="styles.xml"/><Relationship Id="rId4" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme" Target="theme/theme1.xml"/>
</Relationships>

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1.2.3、 worksheets文件夹,保存的就是excel中的sheet

1.2.4、sheet.xml文件

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<worksheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"><!-- 容积，即该sheet中以供占用了多大的地方，哪个单元格到哪个单元格，矩形的左上角单元格和右下角单元格此属性可以判断列数，如下就是：(M-A+1)--><dimension ref="A1:M8"/><!-- sheet视图的配置信息，如打开时默认选中的单元格是哪个 --><sheetViews><sheetView tabSelected="1" workbookViewId="0"><selection activeCell="G12" sqref="G12"/></sheetView></sheetViews><!-- sheet的格式参数 --><sheetFormatPr defaultRowHeight="14.25"/><!-- 行中每列的配置参数 --><cols><col min="1" max="1" width="7.875" customWidth="1"/><col min="2" max="2" width="6.75" customWidth="1"/><col min="3" max="3" width="6" customWidth="1"/><col min="4" max="4" width="4.5" customWidth="1"/><col min="5" max="5" width="8.5" customWidth="1"/><col min="6" max="6" width="9.375" customWidth="1"/><col min="7" max="7" width="13.5" customWidth="1"/><col min="8" max="8" width="7" customWidth="1"/><col min="9" max="9" width="7.625" customWidth="1"/><col min="10" max="10" width="4.625" customWidth="1"/><col min="11" max="11" width="9.5" bestFit="1" customWidth="1"/></cols><!-- 数据区域，这个里面就是我们的单元格的相关数据信息了，是以行（Row）的方式记录的 --><sheetData><!-- excel中的行 --><row r="1" spans="1:13"><!-- excel中的列r:单元格坐标s:单元格的style,对应style.xml中cellXfs元素下的某个元素xf元素，此处就是对应索引为12的元素，从0开始计算，即为第13个xf元素。t:元素类型，s表示是字符串类型，对应到sharedStrings.xml中的sst元素--><c r="A1" s="12" t="s"><!-- 如果是t="s" 则存储的是sharedStrings.xml中sst元素下的某个si元素，此处对应索引为0的元素，即第一个si元素否则，这里存储的就是单元格的值 --><v>0</v></c><c r="B1" s="12" t="s"><v>10</v></c><c r="C1" s="12" t="s"><v>1</v></c><c r="D1" s="12" t="s"><v>2</v></c><c r="E1" s="12" t="s"><v>3</v></c><c r="F1" s="12" t="s"><v>4</v></c><c r="G1" s="12" t="s"><v>5</v></c><c r="H1" s="12" t="s"><v>6</v></c><c r="I1" s="12" t="s"><v>7</v></c><c r="J1" s="12" t="s"><v>8</v></c><c r="K1" s="12" t="s"><v>9</v></c></row><row r="2" spans="1:13"><c r="A2" t="s"><v>11</v></c><c r="B2" s="10" t="s"><v>12</v></c><c r="C2" s="1"><v>2</v></c><c r="D2" s="2" t="s"><v>13</v></c><c r="E2" s="3" t="s"><v>14</v></c><c r="F2" s="4"><v>89</v></c><c r="G2" s="5"><v>10</v></c><c r="H2" s="6"><v>12</v></c><c r="I2" s="7"><v>0.2</v></c><c r="J2" s="8"><v>0.5</v></c><c r="K2" s="9"><v>4564645</v></c><c r="L2" s="10"/><c r="M2" s="11"/></row><row r="3" spans="1:13"><!-- 此处为什么没有A3？因为excel中常规列如果没有值，此处就不记录，因此在读取excel是应该特别注意，否则可能导致列错乱--><c r="B3" s="10"/><c r="C3" s="1"/><c r="D3" s="2"/><c r="E3" s="3"/><c r="F3" s="4"/><c r="G3" s="5"/><c r="H3" s="6"/><c r="I3" s="7"/><c r="J3" s="8"/><c r="K3" s="9"/></row><!-- 该行每列都是常规列，因此没有值的就不记录在这里 --><row r="4" spans="1:13"><c r="A4" s="12" t="s"><v>15</v></c><c r="E4" t="s"><v>16</v></c></row><!-- 5,6,7 行都是合并再一起的单元格 --><row r="5" spans="1:13"><!-- 合并单元格的值记录在起始单元格里，其余单元格置空 --><c r="A5" s="14" t="s"><v>17</v></c><c r="B5" s="13"/><c r="C5" s="13"/><c r="D5" s="13"/><c r="E5" s="13"/><c r="F5" s="13"/><c r="G5" s="13"/><c r="H5" s="13"/><c r="I5" s="13"/><c r="J5" s="13"/><c r="K5" s="13"/></row><row r="6" spans="1:13"><c r="A6" s="13"/><c r="B6" s="13"/><c r="C6" s="13"/><c r="D6" s="13"/><c r="E6" s="13"/><c r="F6" s="13"/><c r="G6" s="13"/><c r="H6" s="13"/><c r="I6" s="13"/><c r="J6" s="13"/><c r="K6" s="13"/></row><row r="7" spans="1:13"><c r="A7" s="13"/><c r="B7" s="13"/><c r="C7" s="13"/><c r="D7" s="13"/><c r="E7" s="13"/><c r="F7" s="13"/><c r="G7" s="13"/><c r="H7" s="13"/><c r="I7" s="13"/><c r="J7" s="13"/><c r="K7" s="13"/></row><row r="8" spans="1:13"><c r="A8" s="13"/><c r="B8" s="13"/><c r="C8" s="13"/><c r="D8" s="13"/><c r="E8" s="13"/><c r="F8" s="13"/><c r="G8" s="13"/><c r="H8" s="13"/><c r="I8" s="13"/><c r="J8" s="13"/><c r="K8" s="13"/></row></sheetData><!-- 这个是记录哪个到哪个是合并单元格的信息的 --><mergeCells count="1"><!-- A5到K8被合并了 --><mergeCell ref="A5:K8"/></mergeCells><!-- --><phoneticPr fontId="1" type="noConversion"/><!-- 页的相关属性设置 --><pageMargins left="0.7" right="0.7" top="0.75" bottom="0.75" header="0.3" footer="0.3"/><!-- 分页设置 --><pageSetup paperSize="9" orientation="portrait" r:id="rId1"/><!-- 图形信息，由图可以看出，这里引用了draw的文档了--><drawing/>
</worksheet>

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1.2.5、sharedStrings.xml文件

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<sst xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main" count="18" uniqueCount="18"><!-- si存储的是字符串的值 --><!-- 此处存储的是sheet.xml中c(列)中属性带有t="s"的列的值，带有t="s"字符串列的定位是通过c元素下的v元素中的值来定位的此处对应的就是v的值为0的单元格的实际值--><si><t>常规</t><phoneticPr fontId="1" type="noConversion"/></si><!-- sheet.xml中c元素中属性t="s"的子元素<v>1</v>的单元格的实际值 --><si><t>数值</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>货币</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>会计专用</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>短日期</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>长日期</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>时间</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>百分比</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>分数</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>科学计数</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>文本</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>common</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>String</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>$</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>D1</t><phoneticPr fontId="1" type="noConversion"/></si><si><t>常规A</t><phoneticPr fontId="1" type="noConversion"/></si><si><r><rPr><sz val="11"/><color theme="1"/><rFont val="宋体"/><family val="3"/><charset val="134"/></rPr><t>常规</t></r><r><rPr><sz val="11"/><color theme="1"/><rFont val="Tahoma"/><family val="2"/><charset val="134"/></rPr><t>D</t></r><phoneticPr fontId="1" type="noConversion"/></si><si><t>说明: 为了简单，行数就设置的少点  第一行为标题行(本身是常规行)，分别标注了每列的属性。第三行和第二行一样的列格式第四行为常规行</t><phoneticPr fontId="1" type="noConversion"/></si>
</sst>

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1.2.6、style.xml文件

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<styleSheet xmlns="http://schemas.openxmlformats.org/spreadsheetml/2006/main"><!-- 数字格式化显示的定义 --><numFmts count="5"><!-- 此处的numFmtId和cellXfs中的numFmtId对应 --><!-- 会计专用 --><!-- 该元素表示cellXfs中xf元素的numFmtId="44"对应的格式化样式 --><numFmt numFmtId="44" formatCode="_ &quot;¥&quot;* #,##0.00_ ;_ &quot;¥&quot;* \-#,##0.00_ ;_ &quot;¥&quot;* &quot;-&quot;??_ ;_ @_ "/><!-- 数值格式 --><numFmt numFmtId="176" formatCode="0.00_);[Red]\(0.00\)"/><!-- 货币 --><numFmt numFmtId="177" formatCode="&quot;¥&quot;#,##0.00_);[Red]\(&quot;¥&quot;#,##0.00\)"/><!-- 长日期 --><numFmt numFmtId="178" formatCode="[$-F800]dddd\,\ mmmm\ dd\,\ yyyy"/><!-- 时间 --><numFmt numFmtId="179" formatCode="[$-F400]h:mm:ss\ AM/PM"/></numFmts><!-- 字体样式 --><fonts count="3"><font><sz val="11"/><color theme="1"/><name val="Tahoma"/><family val="2"/><charset val="134"/></font><font><sz val="9"/><name val="Tahoma"/><family val="2"/><charset val="134"/></font><font><sz val="11"/><color theme="1"/><name val="宋体"/><family val="3"/><charset val="134"/></font></fonts><!-- 填充样式，包括背景色 --><fills count="2"><fill><patternFill patternType="none"/></fill><fill><patternFill patternType="gray125"/></fill></fills><!-- 边框 --><borders count="1"><border><left/><right/><top/><bottom/><diagonal/></border></borders><!-- 提供给cellXfs来调用 --><cellStyleXfs count="1"><!-- 此处的numFmtId和cellXfs中的numFmtId对应 --><xf numFmtId="0" fontId="0" fillId="0" borderId="0"/></cellStyleXfs><!-- 真正的样式定义 --><cellXfs count="15"><!-- 此处的numFmtId和cellStyleXfs、numFmts等中的numFmtId对应 --><!-- sheet.xml中的c(列)元素属性中s的属性值都对应这里一个xf元素，s的属性值存储的就是xf的索引--><xf numFmtId="0" fontId="0" fillId="0" borderId="0" xfId="0"/><!-- 该元素表示sheet.xml中c元素中s="1"对应的样式 --><xf numFmtId="176" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><!-- 该元素表示sheet.xml中c元素中s="2"对应的样式 --><xf numFmtId="177" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="44" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="14" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="178" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="179" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="10" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="12" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="11" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="49" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="13" fontId="0" fillId="0" borderId="0" xfId="0" applyNumberFormat="1"/><xf numFmtId="0" fontId="2" fillId="0" borderId="0" xfId="0" applyFont="1"/><xf numFmtId="0" fontId="2" fillId="0" borderId="0" xfId="0" applyFont="1" applyAlignment="1"><alignment horizontal="left" vertical="top"/></xf><xf numFmtId="0" fontId="2" fillId="0" borderId="0" xfId="0" applyFont="1" applyAlignment="1"><alignment horizontal="left" vertical="top" wrapText="1"/></xf></cellXfs><cellStyles count="1"><cellStyle name="常规" xfId="0" builtinId="0"/></cellStyles><dxfs count="0"/><tableStyles count="0" defaultTableStyle="TableStyleMedium9" defaultPivotStyle="PivotStyleLight16"/>
</styleSheet>

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二、使用java读取EXCEL

1. 依赖的jar包

<dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>3.15</version>
</dependency>
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml</artifactId><version>3.15</version>
</dependency>
<dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml-schemas</artifactId><version>3.15</version>
</dependency>
<dependency><groupId>org.apache.xerces</groupId><artifactId>com.springsource.org.apache.xerces</artifactId><version>2.8.1</version>
</dependency>
<dependency><groupId>commons-lang</groupId><artifactId>commons-lang</artifactId><version>2.6</version>
</dependency>

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2. IExcelRowReader.java

package com.wms.xml;import java.util.List;public interface IExcelRowReader {void getRows(int sheetIndex, int curRow, List<String> rowlist);
}

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3. ExcelReaderUtil.java

package com.wms.xml;import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
import org.xml.sax.SAXException;import java.io.IOException;public class ExcelReaderUtil {public static void read2007Excel(IExcelRowReader rowReader, String path) throwsOpenXML4JException, SAXException, IOException {Excel2007Reader excel2007Reader = new Excel2007Reader();excel2007Reader.setRowReader(rowReader);excel2007Reader.load(path);}}

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4. Excel2007Reader.java

package com.wms.xml;import org.apache.commons.lang.StringUtils;
import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.ss.usermodel.BuiltinFormats;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.xssf.eventusermodel.XSSFReader;
import org.apache.poi.xssf.model.SharedStringsTable;
import org.apache.poi.xssf.model.StylesTable;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;public class Excel2007Reader extends DefaultHandler {//列元素private static final String C_ELEMENT = "c";//列中属性rprivate static final String R_ATTR = "r";//列中的v元素private static final String V_ELEMENT = "v";//列中的t元素private static final String T_ELEMENT = "t";//列中属性值private static final String S_ATTR_VALUE = "s";//列中属性值private static final String T_ATTR_VALUE = "t";//sheet r:Id前缀private static final String RID_PREFIX = "rId";//行元素private static final String ROW_ELEMENT = "row";//时间格式化字符串private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";//saxParserprivate static final String CLASS_SAXPARSER = "org.apache.xerces.parsers.SAXParser";//填充字符串private static final String CELL_FILL_STR = "@";//列的最大位数private static final int MAX_CELL_BIT = 3;//excel 2007 的共享字符串表,对应sharedString.xmlprivate SharedStringsTable sharedStringsTable;private final DataFormatter dataFormatter = new DataFormatter();//当前行private int curRow;//当前列private int curCell;//上一次的内容private String lastContent;//是否是String类型的private boolean nextIsString;//单元数据类型private CellDataType cellDataType;//当前列坐标， 如A1，B5private String curCoordinate;//前一个列的坐标private String preCoordinate;//行的最大列坐标private String maxCellCoordinate;//单元格的格式表，对应style.xmlprivate StylesTable stylesTable;//单元格存储格式的索引，对应style.xml中的numFmts元素的子元素索引private int numFmtIndex;//单元格存储的格式化字符串，nmtFmt的formateCode属性的值private String numFmtString;//sheet的索引private int sheetIndex = -1;//存储每行的列元素List<String> rowCellList = new ArrayList<String>();//单元格的数据格式enum CellDataType {BOOL("b"),ERROR("e"),FORMULA("str"),INLINESTR("inlineStr"),SSTINDEX("s"),NUMBER(""),DATE("m/d/yy"),NULL("");private String name;CellDataType(String name) {this.name = name;}public String getName() {return name;}public void setName(String name) {this.name = name;}}private IExcelRowReader rowReader;public void setRowReader(IExcelRowReader rowReader) {this.rowReader = rowReader;}/*** 读取excel中的制定索引sheet** @param path* @param sheetIndex* @throws OpenXML4JException* @throws IOException* @throws SAXException*/public void load(String path, int sheetIndex) throws OpenXML4JException, IOException,SAXException {OPCPackage opcPackage = OPCPackage.open(path);XSSFReader xssfReader = new XSSFReader(opcPackage);//获取styleTablestylesTable = xssfReader.getStylesTable();//获取共享字符串表SharedStringsTable sharedStringsTable = xssfReader.getSharedStringsTable();this.sharedStringsTable = sharedStringsTable;//获取解析器XMLReader xmlReader = fetchSheetReader(sharedStringsTable);// 根据 rId# 或 rSheet# 查找sheetInputStream sheetInputStream = xssfReader.getSheet(RID_PREFIX + sheetIndex);InputSource sheetInputSource = new InputSource(sheetInputStream);xmlReader.parse(sheetInputSource);//关闭流
        closeStream(sheetInputStream);}/*** 遍历所有的sheet** @param path* @throws IOException* @throws OpenXML4JException* @throws SAXException*/public void load(String path) throws IOException, OpenXML4JException, SAXException {OPCPackage opcPackage = OPCPackage.open(path);XSSFReader xssfReader = new XSSFReader(opcPackage);stylesTable = xssfReader.getStylesTable();SharedStringsTable sharedStringsTable = xssfReader.getSharedStringsTable();this.sharedStringsTable = sharedStringsTable;XMLReader xmlReader = fetchSheetReader(sharedStringsTable);Iterator<InputStream> sheetsInputStream = xssfReader.getSheetsData();while (sheetsInputStream.hasNext()) {curRow = 0;sheetIndex++;InputStream sheetInputStream = sheetsInputStream.next();InputSource sheetInputSource = new InputSource(sheetInputStream);xmlReader.parse(sheetInputSource);closeStream(sheetInputStream);}}/*** 获取sheet的解析器** @param sharedStringsTable* @return* @throws SAXException*/public XMLReader fetchSheetReader(SharedStringsTable sharedStringsTable) throws SAXException {XMLReader xmlReader = XMLReaderFactory.createXMLReader(CLASS_SAXPARSER);xmlReader.setContentHandler(this);return xmlReader;}@Overridepublic void startElement(String uri, String localName, String qName, Attributes attributes)throws SAXException {//c 表示列if (C_ELEMENT.equals(qName)) {//获取当前列坐标String tempCurCoordinate = attributes.getValue(R_ATTR);//前一列为null，则将其设置为"@",A为第一列，ascii码为65，前一列即为@，ascii码64if (preCoordinate == null) {preCoordinate = CELL_FILL_STR;} else {//存在，则前一列要设置为上一列的坐标preCoordinate = curCoordinate;}//重置当前列curCoordinate = tempCurCoordinate;//设置单元格类型
            setCellType(attributes);//t 属性值String type = attributes.getValue(T_ATTR_VALUE);//s 表示该列为字符串if (S_ATTR_VALUE.equals(type)) {nextIsString = true;}}lastContent = "";}/*** 设置单元格的类型** @param attribute*/private void setCellType(Attributes attribute) {//默认是数字类型cellDataType = CellDataType.NUMBER;//重置numFmtIndex,numFmtString的值numFmtIndex = 0;numFmtString = "";//单元格的格式类型String cellType = attribute.getValue(T_ATTR_VALUE);//获取单元格的xf索引，对应style.xml中cellXfs的子元素xfString xfIndexStr = attribute.getValue(S_ATTR_VALUE);if (CellDataType.BOOL.getName().equals(cellType)) {cellDataType = CellDataType.BOOL;} else if (CellDataType.ERROR.getName().equals(cellType)) {cellDataType = CellDataType.ERROR;} else if (CellDataType.INLINESTR.getName().equals(cellType)) {cellDataType = CellDataType.INLINESTR;} else if (CellDataType.FORMULA.getName().equals(cellType)) {cellDataType = CellDataType.FORMULA;} else if (CellDataType.SSTINDEX.getName().equals(cellType)) {cellDataType = CellDataType.SSTINDEX;}if (xfIndexStr != null) {int xfIndex = Integer.parseInt(xfIndexStr);XSSFCellStyle xssfCellStyle = stylesTable.getStyleAt(xfIndex);numFmtIndex = xssfCellStyle.getDataFormat();numFmtString = xssfCellStyle.getDataFormatString();if (CellDataType.DATE.getName().equals(numFmtString)) {cellDataType = CellDataType.DATE;numFmtString = DATE_FORMAT;}if (numFmtString == null) {cellDataType = CellDataType.NULL;numFmtString = BuiltinFormats.getBuiltinFormat(numFmtIndex);}}}@Overridepublic void endElement(String uri, String localName, String qName) throws SAXException {String value = StringUtils.trim(lastContent);if (T_ELEMENT.equals(qName)) {rowCellList.add(curCell++, value);} else if (C_ELEMENT.equals(qName)) {value = getDataValue(value);//补全单元格之间的空格fillBlackCell(curCoordinate, preCoordinate, false);rowCellList.add(curCell++, value);} else {//如果是row标签，说明已经到了一行的结尾if (ROW_ELEMENT.equals(qName)) {//最大列坐标以第一行的为准if (curRow == 0) {maxCellCoordinate = curCoordinate;}//补全一行尾部可能缺失的单元格if (maxCellCoordinate != null) {fillBlackCell(maxCellCoordinate, curCoordinate, true);}rowReader.getRows(sheetIndex, curRow, rowCellList);//一行结束//清空rowCellList,
                rowCellList.clear();//行数增加curRow++;//当前列置0curCell = 0;//置空当前列坐标和前一列坐标curCoordinate = null;preCoordinate = null;}}}/*** 填充空白单元格** @param curCoordinate* @param preCoordinate*/private void fillBlackCell(String curCoordinate, String preCoordinate, boolean isEnd) {if (!curCoordinate.equals(preCoordinate)) {int len = calNullCellCount(curCoordinate, preCoordinate, isEnd);for (int i = 0; i < len; i++) {rowCellList.add(curCell++, "");}}}/*** 计算当前单元格和前一个单元格之间的空白单元格数量* 如果是尾部则不减1** @param curCoordinate* @param preCoordinate* @return*/private int calNullCellCount(String curCoordinate, String preCoordinate, boolean isEnd) {// excel2007最大行数是1048576，最大列数是16384，最后一列列名是XFDString curCellCoordinate = curCoordinate.replaceAll("\\d+", "");String preCellCoordinate = preCoordinate.replaceAll("\\d+", "");curCellCoordinate = fillChar(curCellCoordinate, MAX_CELL_BIT, CELL_FILL_STR);preCellCoordinate = fillChar(preCellCoordinate, MAX_CELL_BIT, CELL_FILL_STR);char[] cur = curCellCoordinate.toCharArray();char[] pre = preCellCoordinate.toCharArray();int len = (cur[0] - pre[0]) * 26 * 26 + (cur[1] - pre[1]) * 26 + (cur[2] - pre[2]);if (!isEnd) {len = len - 1;}return len;}/*** 将不足指定位数的字符串补全，高位补上指定字符串** @param cellCoordinate* @param maxLen* @param fillChar* @return*/private String fillChar(String cellCoordinate, int maxLen, String fillChar) {int coordinateLen = cellCoordinate.length();if (coordinateLen < maxLen) {for (int i = 0; i < (maxLen - coordinateLen); i++) {cellCoordinate = fillChar + cellCoordinate;}}return cellCoordinate;}private String getDataValue(String lastContent) {String value = "";XSSFRichTextString xssfRichTextString = null;switch (cellDataType) {case BOOL:char first = lastContent.charAt(0);value = first == '0' ? "FALSE" : "TRUE";break;case ERROR:value = "\"ERROR:" + lastContent + '"';break;case FORMULA:value = '"' + lastContent + '"';break;case INLINESTR:xssfRichTextString = new XSSFRichTextString(lastContent);value = xssfRichTextString.getString();xssfRichTextString = null;break;case SSTINDEX:try {int index = Integer.parseInt(lastContent);xssfRichTextString = new XSSFRichTextString(sharedStringsTable.getEntryAt(index));value = xssfRichTextString.getString();xssfRichTextString = null;} catch (NumberFormatException e) {value = lastContent;}break;case NUMBER:if (numFmtString != null) {value = dataFormatter.formatRawCellContents(Double.parseDouble(lastContent),numFmtIndex, numFmtString);} else {value = lastContent;}value = value.replace("_", "");break;case DATE:value = dataFormatter.formatRawCellContents(Double.parseDouble(lastContent),numFmtIndex, numFmtString);break;default:value = "";break;}return value;}@Overridepublic void characters(char[] ch, int start, int length) throws SAXException {// 得到单元格内容的值lastContent += new String(ch, start, length);}/*** 关闭流** @param inputStream*/public void closeStream(InputStream inputStream) {if (inputStream != null) {try {inputStream.close();} catch (IOException e) {e.printStackTrace();}}}public static void main(String[] args) {
//        System.out.println("m/d/yy" == CellDataType.DATE.getName());
//        System.out.println('"' + "ss" + '"');
//        char[] letter = "@@A".toCharArray();
//        char[] letter_1 = "@@B".toCharArray();
//        int res = (letter[0] - letter_1[0]) * 26 * 26 + (letter[1] - letter_1[1]) * 26 +
//                (letter[2] - letter_1[2]);
//        System.out.println(res);
//        System.out.println(Integer.valueOf('@'));IExcelRowReader rowReader = new ExcelRowReader();try {// ExcelReaderUtil.readExcel(rowReader,// "E://2016-07-04-011940a.xls");System.out.println("**********************************************");ExcelReaderUtil.read2007Excel(rowReader, "F:\\studygit\\test.xlsx");} catch (Exception e) {e.printStackTrace();}}}

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转载于:https://www.cnblogs.com/wangmingshun/p/6654143.html