org.dromara.hutool.poi.excel.cell.CellReferenceUtil Maven / Gradle / Ivy
/*
* Copyright (c) 2013-2024 Hutool Team and hutool.cn
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.dromara.hutool.poi.excel.cell;
import org.apache.poi.ss.util.CellReference;
import org.dromara.hutool.core.text.StrUtil;
/**
* 单元格位置{@link CellReference}工具类，提供包括行号转行名称、列号转列名称等功能。
*
* @author looly
* @since 6.0.0
*/
public class CellReferenceUtil {
/**
* 将Sheet列号变为列名
*
* @param index 列号, 从0开始
* @return 0-》A; 1-》B...26-》AA
*/
public static String indexToColName(int index) {
if (index < 0) {
return null;
}
final StringBuilder colName = StrUtil.builder();
do {
if (colName.length() > 0) {
index--;
}
final int remainder = index % 26;
colName.append((char) (remainder + 'A'));
index = (index - remainder) / 26;
} while (index > 0);
return colName.reverse().toString();
}
/**
* 根据表元的列名转换为列号
*
* @param colName 列名, 从A开始
* @return A1-》0; B1-》1...AA1-》26
*/
public static int colNameToIndex(final String colName) {
final int length = colName.length();
char c;
int index = -1;
for (int i = 0; i < length; i++) {
c = Character.toUpperCase(colName.charAt(i));
if (Character.isDigit(c)) {
break;// 确定指定的char值是否为数字
}
index = (index + 1) * 26 + (int) c - 'A';
}
return index;
}
/**
* 将Excel中地址标识符（例如A11，B5）等转换为行列表示
* 例如：A11 -》 col:0,row:10，B5-》col:1,row:4
*
* @param locationRef 单元格地址标识符，例如A11，B5
* @return 坐标点
*/
public static CellReference toCellReference(final String locationRef) {
return new CellReference(locationRef);
}
}