update README.md.

疯狂的狮子Li

2021-06-25 b51b8b1b41d4a402028e00a15c17dd60c4c4ff06

 ruoyi-common/src/main/java/com/ruoyi/common/constant/GenConstants.java

@@ -13,6 +13,9 @@
    /** 树表（增删改查） */
    public static final String TPL_TREE = "tree";

    /** 主子表（增删改查） */
    public static final String TPL_SUB = "sub";

    /** 树编码字段 */
    public static final String TREE_CODE = "treeCode";