168:Excel表列名称

src/main/java/leetcode/editor/cn/ExcelSheetColumnTitle.java

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+//给定一个正整数，返回它在 Excel 表中相对应的列名称。 
+//
+// 例如， 
+//
+//     1 -> A
+//    2 -> B
+//    3 -> C
+//    ...
+//    26 -> Z
+//    27 -> AA
+//    28 -> AB 
+//    ...
+// 
+//
+// 示例 1: 
+//
+// 输入: 1
+//输出: "A"
+// 
+//
+// 示例 2: 
+//
+// 输入: 28
+//输出: "AB"
+// 
+//
+// 示例 3: 
+//
+// 输入: 701
+//输出: "ZY"
+// 
+// Related Topics 数学 字符串 
+// 👍 370 👎 0
+
+package leetcode.editor.cn;
+
+//168:Excel表列名称
+public class ExcelSheetColumnTitle {
+    public static void main(String[] args) {
+        //测试代码
+        Solution solution = new ExcelSheetColumnTitle().new Solution();
+    }
+
+    //力扣代码
+    //leetcode submit region begin(Prohibit modification and deletion)
+    class Solution {
+        public String convertToTitle(int columnNumber) {
+            StringBuilder result = new StringBuilder();
+            while (columnNumber > 0) {
+                int num = (columnNumber - 1) % 26 + 1;
+                result.insert(0, (char)((num - 1) + 'A'));
+                columnNumber = (columnNumber - num) / 26;
+            }
+            return result.toString();
+        }
+    }
+//leetcode submit region end(Prohibit modification and deletion)
+
+}

src/main/java/leetcode/editor/cn/ExcelSheetColumnTitle.md

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+<p>给定一个正整数，返回它在 Excel 表中相对应的列名称。</p>
+
+<p>例如，</p>
+
+<pre>    1 -&gt; A
+    2 -&gt; B
+    3 -&gt; C
+    ...
+    26 -&gt; Z
+    27 -&gt; AA
+    28 -&gt; AB 
+    ...
+</pre>
+
+<p><strong>示例 1:</strong></p>
+
+<pre><strong>输入:</strong> 1
+<strong>输出:</strong> &quot;A&quot;
+</pre>
+
+<p><strong>示例&nbsp;2:</strong></p>
+
+<pre><strong>输入:</strong> 28
+<strong>输出:</strong> &quot;AB&quot;
+</pre>
+
+<p><strong>示例&nbsp;3:</strong></p>
+
+<pre><strong>输入:</strong> 701
+<strong>输出:</strong> &quot;ZY&quot;
+</pre>
+<div><div>Related Topics</div><div><li>数学</li><li>字符串</li></div></div>\n<div><li>👍 370</li><li>👎 0</li></div>