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;
}
}
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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
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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