feat: String常量

src/main/java/com/uas/platform/b2b/constant/StringConstant.java

@@ -0,0 +1,15 @@
+package com.uas.platform.b2b.constant;
+
+/**
+ * 字符串常用值
+ *
+ * @author hejq
+ * @date 2018-12-14 22:06
+ */
+public class StringConstant {
+
+    /**
+     * 空字符串
+     */
+    public static final String BLANK = " ";
+}