最近写一个程序,须要操做excel,遂稍微深刻了解下poi从操做,java
在须要复制一个sheet的时候,找到三份资料apache
若是在copy一个cell的时候,须要把样式也copy过去,怎么办,会怎样呢?app
若是像第三份资料中所作,会建立太多的style,而这些style又是重复的 ,毫无心义,数据多了还报错xss
若是像第二份资料中所作,前提是同一个workbook,也不存在copy style 的问题,只不过是不一样的cell引用相同的style而已测试
若是像第一份资料所作,他本身都注释掉了,由于报错this
暂时没测试过,写出来就火烧眉毛要分享了。.net
import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.Workbook; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * 提供经常使用excel操做<br> * <ul> * <li></li> * </ul> */ public class ExcelOperationUtil { private static Logger logger = LoggerFactory.getLogger(ExcelOperationUtil.class); /** * 把一个excel中的styleTable复制到另外一个excel中 * @return StyleMapping 两个文件中styleTable的映射关系 * @see StyleMapping */ public static StyleMapping copyCellStyle(Workbook srcBook, Workbook desBook){ if (null == srcBook || null == desBook) { throw new ExcelExecption("源excel 或 目标excel 不存在"); } if (srcBook.equals(desBook)) { throw new ExcelExecption("不要使用此方法在同一个文件中copy style"); } logger.debug("src中style number:{}, des中style number:{}", srcBook.getNumCellStyles(), desBook.getNumCellStyles()); short[] src2des = new short[srcBook.getNumCellStyles()]; short[] des2src = new short[desBook.getNumCellStyles() + srcBook.getNumCellStyles()]; for(short i=0;i<srcBook.getNumCellStyles();i++){ //创建双向映射 CellStyle srcStyle = srcBook.getCellStyleAt(i); CellStyle desStyle = desBook.createCellStyle(); src2des[srcStyle.getIndex()] = desStyle.getIndex(); des2src[desStyle.getIndex()] = srcStyle.getIndex(); //复制样式 desStyle.cloneStyleFrom(srcStyle); } return new StyleMapping(des2src, src2des); } /** * 存放两个excel文件中的styleTable的映射关系,以便于在复制表格时,在目标文件中获取到对应的样式 */ public static class StyleMapping { /** * */ private short[] des2srcIndexMapping; /** * */ private short[] src2desIndexMapping; /** * 不容许其余类建立此类型对象 */ private StyleMapping() { } private StyleMapping(short[] des2srcIndexMapping, short[] src2desIndexMapping) { this.des2srcIndexMapping = des2srcIndexMapping; this.src2desIndexMapping = src2desIndexMapping; } public short srcIndex(short desIndex) { if (desIndex < 0 || desIndex >= this.des2srcIndexMapping.length) { throw new ExcelExecption("索引越界:源文件styleNum=" + this.des2srcIndexMapping.length + " 访问位置=" + desIndex); } return this.des2srcIndexMapping[desIndex]; } /** * 根据源文件的style的index,获取目标文件的style的index * @param srcIndex 源excel中style的index * @return desIndex 目标excel中style的index */ public short desIndex(short srcIndex) { if (srcIndex < 0 || srcIndex >= this.src2desIndexMapping.length) { throw new ExcelExecption("索引越界:源文件styleNum=" + this.src2desIndexMapping.length + " 访问位置=" + srcIndex); } return this.src2desIndexMapping[srcIndex]; } } }
工做忙了几天,终于能够回头把这件事结束掉了debug
<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-scratchpad</artifactId> <version>3.17</version> </dependency>
为啥贴出依赖?由于我一开始用3.8版本,若是是xls就能够,若是是xlsx死活不行,最后,换掉版本就能够了。excel
import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.util.Iterator; /** * 提供经常使用excel操做<br> * <ul> * <li></li> * </ul> */ public class ExcelOperationUtil { private static Logger logger = LoggerFactory.getLogger(ExcelOperationUtil.class); /** * sheet 复制,复制数据、若是同一个文件,复制样式,不一样文件则只复制数据<br/> * 若是是同book中复制,建议使用workbook中的cloneSheet()方法<br/> * * <br/>建议用于 不一样book间只复制数据 * */ public static void copySheet(Sheet srcSheet, Sheet desSheet) { copySheet(srcSheet, desSheet, true, true, null); } /** * sheet 复制,若是同一个文件,复制样式,不一样文件则不复制<br/> * * <br/>建议用于 同book中,只复制样式,不复制数据<br/> * eg: copySheet(srcSheet, desSheet, false) * * @param copyValueFlag 控制是否复制数据 */ public static void copySheet(Sheet srcSheet, Sheet desSheet, boolean copyValueFlag) { copySheet(srcSheet, desSheet, copyValueFlag, true, null); } /** * sheet 复制,复制数据、样式<br/> * * <br/>建议用于 不一样book间复制,同时复制数据和样式<br/> * eg: copySheet(srcSheet, desSheet, mapping) * * @param mapping 不一样文件间复制时,若是要复制样式,必传,不然不复制样式 */ public static void copySheet(Sheet srcSheet, Sheet desSheet, StyleMapping mapping) { copySheet(srcSheet, desSheet, true, true, mapping); } /** * sheet 复制,复制数据<br/> * * <br/>建议用于 同book中,只复制数据,不复制样式<br/> * eg: copySheet(srcSheet, desSheet, false, null) * * @param srcSheet * @param desSheet * @param copyStyleFlag * @param mapping */ public static void copySheet(Sheet srcSheet, Sheet desSheet, boolean copyStyleFlag, StyleMapping mapping) { copySheet(srcSheet, desSheet, true, copyStyleFlag, mapping); } /** * sheet 复制, 灵活控制是否控制数据、样式<br/> * * <br/>不建议直接使用 * * @param copyValueFlag 控制是否复制数据 * @param copyStyleFlag 控制是否复制样式 * @param mapping 不一样book中复制样式时,必传 */ public static void copySheet(Sheet srcSheet, Sheet desSheet, boolean copyValueFlag, boolean copyStyleFlag, StyleMapping mapping) { if (srcSheet.getWorkbook() == desSheet.getWorkbook()) { logger.warn("统一workbook内复制sheet建议使用 workbook的cloneSheet方法"); } //合并区域处理 copyMergedRegion(srcSheet, desSheet); //行复制 Iterator<Row> rowIterator = srcSheet.rowIterator(); int areadlyColunm = 0; while (rowIterator.hasNext()) { Row srcRow = rowIterator.next(); Row desRow = desSheet.createRow(srcRow.getRowNum()); copyRow(srcRow, desRow, copyValueFlag, copyStyleFlag, mapping); //调整列宽(增量调整) if (srcRow.getPhysicalNumberOfCells() > areadlyColunm) { for (int i = areadlyColunm; i < srcRow.getPhysicalNumberOfCells(); i++) { desSheet.setColumnWidth(i, srcSheet.getColumnWidth(i)); } areadlyColunm = srcRow.getPhysicalNumberOfCells(); } } } /** * 复制行 */ public static void copyRow(Row srcRow, Row desRow) { copyRow(srcRow, desRow, true, true, null); } /** * 复制行 */ public static void copyRow(Row srcRow, Row desRow, boolean copyValueFlag) { copyRow(srcRow, desRow, copyValueFlag, true, null); } /** * 复制行 */ public static void copyRow(Row srcRow, Row desRow, StyleMapping mapping) { copyRow(srcRow, desRow, true, true, mapping); } /** * 复制行 */ public static void copyRow(Row srcRow, Row desRow, boolean copyStyleFlag, StyleMapping mapping) { copyRow(srcRow, desRow, true, copyStyleFlag, mapping); } /** * 复制行 */ public static void copyRow(Row srcRow, Row desRow,boolean copyValueFlag, boolean copyStyleFlag, StyleMapping mapping) { Iterator<Cell> it = srcRow.cellIterator(); while (it.hasNext()) { Cell srcCell = it.next(); Cell desCell = desRow.createCell(srcCell.getColumnIndex()); copyCell(srcCell, desCell, copyValueFlag, copyStyleFlag, mapping); } } /** * 复制区域(合并单元格) */ public static void copyMergedRegion(Sheet srcSheet, Sheet desSheet) { int sheetMergerCount = srcSheet.getNumMergedRegions(); for (int i = 0; i < sheetMergerCount; i++) { desSheet.addMergedRegion(srcSheet.getMergedRegion(i)); CellRangeAddress cellRangeAddress = srcSheet.getMergedRegion(i); } } /** * 复制单元格,复制数据,若是同文件,复制样式,不一样文件则不复制样式 */ public static void copyCell(Cell srcCell, Cell desCell) { copyCell(srcCell, desCell, true, true,null); } /** * 复制单元格, 若是同文件,复制样式,不一样文件则不复制样式 * @param copyValueFlag 控制是否复制数据 */ public static void copyCell(Cell srcCell, Cell desCell, boolean copyValueFlag) { copyCell(srcCell, desCell, copyValueFlag, true, null); } /** * 复制单元格,复制数据,复制样式 * @param mapping 不一样文件间复制时,若是要复制样式,必传,不然不复制样式 */ public static void copyCell(Cell srcCell, Cell desCell, StyleMapping mapping) { copyCell(srcCell, desCell, true, true, mapping); } /** * 复制单元格,复制数据 * @param copyStyleFlag 控制是否复制样式 * @param mapping 不一样文件间复制时,若是要复制样式,必传,不然不复制样式 */ public static void copyCell(Cell srcCell, Cell desCell, boolean copyStyleFlag, StyleMapping mapping) { copyCell(srcCell, desCell, true, copyStyleFlag, mapping); } /** * 复制单元格 * @param copyValueFlag 控制是否复制单元格的内容 * @param copyStyleFlag 控制是否复制样式 * @param mapping 不一样文件间复制时,若是须要连带样式复制,必传,不然不复制样式 */ public static void copyCell(Cell srcCell, Cell desCell, boolean copyValueFlag, boolean copyStyleFlag, StyleMapping mapping) { Workbook srcBook = srcCell.getSheet().getWorkbook(); Workbook desBook = desCell.getSheet().getWorkbook(); //复制样式 //若是是同一个excel文件内,连带样式一块儿复制 if (srcBook == desBook && copyStyleFlag) { //同文件,复制引用 desCell.setCellStyle(srcCell.getCellStyle()); } else if (copyStyleFlag) { //不一样文件,经过映射关系复制 if (null != mapping) { short desIndex = mapping.desIndex(srcCell.getCellStyle().getIndex()); desCell.setCellStyle(desBook.getCellStyleAt(desIndex)); } } //复制评论 if (srcCell.getCellComment() != null) { desCell.setCellComment(srcCell.getCellComment()); } //复制内容 desCell.setCellType(srcCell.getCellTypeEnum()); if (copyValueFlag) { switch (srcCell.getCellTypeEnum()) { case STRING: desCell.setCellValue(srcCell.getStringCellValue()); break; case NUMERIC: desCell.setCellValue(srcCell.getNumericCellValue()); break; case FORMULA: desCell.setCellFormula(srcCell.getCellFormula()); break; case BOOLEAN: desCell.setCellValue(srcCell.getBooleanCellValue()); break; case ERROR: desCell.setCellValue(srcCell.getErrorCellValue()); break; case BLANK: //nothing to do break; default: break; } } } /** * 把一个excel中的styleTable复制到另外一个excel中<br> * 若是是同一个excel文件,就不用复制styleTable了 * @return StyleMapping 两个文件中styleTable的映射关系 * @see StyleMapping */ public static StyleMapping copyCellStyle(Workbook srcBook, Workbook desBook){ if (null == srcBook || null == desBook) { throw new ExcelException("源excel 或 目标excel 不存在"); } if (srcBook.equals(desBook)) { throw new ExcelException("不要使用此方法在同一个文件中copy style,同一个excel中复制sheet不须要copy Style"); } if ((srcBook instanceof HSSFWorkbook && desBook instanceof XSSFWorkbook) || (srcBook instanceof XSSFWorkbook && desBook instanceof HSSFWorkbook)) { throw new ExcelException("不支持在不一样的版本的excel中复制样式)"); } logger.debug("src中style number:{}, des中style number:{}", srcBook.getNumCellStyles(), desBook.getNumCellStyles()); short[] src2des = new short[srcBook.getNumCellStyles()]; short[] des2src = new short[desBook.getNumCellStyles() + srcBook.getNumCellStyles()]; for(short i=0;i<srcBook.getNumCellStyles();i++){ //创建双向映射 CellStyle srcStyle = srcBook.getCellStyleAt(i); CellStyle desStyle = desBook.createCellStyle(); src2des[srcStyle.getIndex()] = desStyle.getIndex(); des2src[desStyle.getIndex()] = srcStyle.getIndex(); //复制样式 desStyle.cloneStyleFrom(srcStyle); } return new StyleMapping(des2src, src2des); } /** * 存放两个excel文件中的styleTable的映射关系,以便于在复制表格时,在目标文件中获取到对应的样式 */ public static class StyleMapping { /** * */ private short[] des2srcIndexMapping; /** * */ private short[] src2desIndexMapping; /** * 不容许其余类建立此类型对象 */ private StyleMapping() { } public StyleMapping(short[] des2srcIndexMapping, short[] src2desIndexMapping) { this.des2srcIndexMapping = des2srcIndexMapping; this.src2desIndexMapping = src2desIndexMapping; } public short srcIndex(short desIndex) { if (desIndex < 0 || desIndex >= this.des2srcIndexMapping.length) { throw new ExcelException("索引越界:源文件styleNum=" + this.des2srcIndexMapping.length + " 访问位置=" + desIndex); } return this.des2srcIndexMapping[desIndex]; } /** * 根据源文件的style的index,获取目标文件的style的index * @param srcIndex 源excel中style的index * @return desIndex 目标excel中style的index */ public short desIndex(short srcIndex) { if (srcIndex < 0 || srcIndex >= this.src2desIndexMapping.length) { throw new ExcelException("索引越界:源文件styleNum=" + this.src2desIndexMapping.length + " 访问位置=" + srcIndex); } return this.src2desIndexMapping[srcIndex]; } } }
一个自定义异常类code
public class ExcelException extends RuntimeException { public ExcelException() { } public ExcelException(String message) { super(message); } public ExcelException(String message, Throwable cause) { super(message, cause); } public ExcelException(Throwable cause) { super(cause); } public ExcelException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) { super(message, cause, enableSuppression, writableStackTrace); } }