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本文實(shí)例講述了Java實(shí)現(xiàn)的Excel列號(hào)數(shù)字與字母互相轉(zhuǎn)換功能。分享給大家供大家參考,具體如下:
我們?cè)趯?shí)現(xiàn)對(duì)Excel的導(dǎo)入導(dǎo)出的時(shí)候,往往需要準(zhǔn)確的給用戶提示信息,提示到具體的Excel的單元格,這里就需要對(duì)Excel的列號(hào)進(jìn)行數(shù)字和字母的轉(zhuǎn)換,今天正好用到這個(gè)需求,所以就寫了一個(gè)demo,總結(jié)一下:
Java實(shí)現(xiàn):
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; } }
測(cè)試結(jié)果:
‘AA' column index of 27 26 column in excel of Z ‘AAAA' column index of 18279 466948 column in excel of ZNSN
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