本文实例讲述了Java实现的Excel列号数字与字母互相转换功能。分享给大家供大家参考,具体如下:
我们在实现对Excel的导入导出的时候,往往需要准确的给用户提示信息,提示到具体的Excel的单元格,这里就需要对Excel的列号进行数字和字母的转换,今天正好用到这个需求,所以就写了一个demo,总结一下:
Java实现:
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package test; /** * Deal with Excel column indexToStr and strToIndex * @author Stephen.Huang * @version 2015-7-8 */ public class ExcelColumn { public static void main(String[] args) { String colstr = "AA" ; int colIndex = excelColStrToNum(colstr, colstr.length()); System.out.println( "'" + colstr + "' column index of " + colIndex); colIndex = 26 ; colstr = excelColIndexToStr(colIndex); System.out.println(colIndex + " column in excel of " + colstr); colstr = "AAAA" ; colIndex = excelColStrToNum(colstr, colstr.length()); System.out.println( "'" + colstr + "' column index of " + colIndex); colIndex = 466948 ; colstr = excelColIndexToStr(colIndex); System.out.println(colIndex + " column in excel of " + colstr); } /** * Excel column index begin 1 * @param colStr * @param length * @return */ public static int excelColStrToNum(String colStr, int length) { int num = 0 ; int result = 0 ; for ( int i = 0 ; i < length; i++) { char ch = colStr.charAt(length - i - 1 ); num = ( int )(ch - 'A' + 1 ) ; num *= Math.pow( 26 , i); result += num; } return result; } /** * Excel column index begin 1 * @param columnIndex * @return */ public static String excelColIndexToStr( int columnIndex) { if (columnIndex <= 0 ) { return null ; } String columnStr = "" ; columnIndex--; do { if (columnStr.length() > 0 ) { columnIndex--; } columnStr = (( char ) (columnIndex % 26 + ( int ) 'A' )) + columnStr; columnIndex = ( int ) ((columnIndex - columnIndex % 26 ) / 26 ); } while (columnIndex > 0 ); return columnStr; } } |
测试结果:
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‘AA' column index of 27 26 column in excel of Z ‘AAAA' column index of 18279 466948 column in excel of ZNSN |
希望本文所述对大家java程序设计有所帮助。
原文链接:http://blog.csdn.net/u010571844/article/details/46806265