Merge pull request #1629 from liubenlong/master

LongestMatchColumnWidthStyleStrategy设置列宽BUG

src/main/java/com/alibaba/excel/write/style/column/LongestMatchColumnWidthStyleStrategy.java

@@ -33,6 +33,12 @@ public class LongestMatchColumnWidthStyleStrategy extends AbstractColumnWidthSty
         if (!needSetWidth) {
             return;
         }
+        
+        //LongestMatchColumnWidthStyleStrategy设置列宽BUG：与spring集成时 ，由于bean是单例，CACHE内容不会改变，同一个报表只有第一次调用会动态设置列宽
+        if (cell.getRowIndex() == 0 && cell.getColumnIndex() == 0) {
+            CACHE.clear();
+        }
+        
         Map<Integer, Integer> maxColumnWidthMap = cache.get(writeSheetHolder.getSheetNo());
         if (maxColumnWidthMap == null) {
             maxColumnWidthMap = new HashMap<Integer, Integer>(16);