权限错误消息提醒添加注释，方便理解

ruoyi-common/src/main/java/com/ruoyi/common/utils/security/Md5Utils.java

@@ -0,0 +1,66 @@
+package com.ruoyi.common.utils.security;
+
+import java.security.MessageDigest;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Md5加密方法
+ * 
+ * @author ruoyi
+ */
+public class Md5Utils
+{
+    private static final Logger log = LoggerFactory.getLogger(Md5Utils.class);
+
+    private static byte[] md5(String s)
+    {
+        MessageDigest algorithm;
+        try
+        {
+            algorithm = MessageDigest.getInstance("MD5");
+            algorithm.reset();
+            algorithm.update(s.getBytes("UTF-8"));
+            byte[] messageDigest = algorithm.digest();
+            return messageDigest;
+        }
+        catch (Exception e)
+        {
+            log.error("MD5 Error...", e);
+        }
+        return null;
+    }
+
+    private static final String toHex(byte hash[])
+    {
+        if (hash == null)
+        {
+            return null;
+        }
+        StringBuffer buf = new StringBuffer(hash.length * 2);
+        int i;
+
+        for (i = 0; i < hash.length; i++)
+        {
+            if ((hash[i] & 0xff) < 0x10)
+            {
+                buf.append("0");
+            }
+            buf.append(Long.toString(hash[i] & 0xff, 16));
+        }
+        return buf.toString();
+    }
+
+    public static String hash(String s)
+    {
+        try
+        {
+            return new String(toHex(md5(s)).getBytes("UTF-8"), "UTF-8");
+        }
+        catch (Exception e)
+        {
+            log.error("not supported charset...{}", e);
+            return s;
+        }
+    }
+}

ruoyi-common/src/main/java/com/ruoyi/common/utils/security/PermissionUtils.java

@@ -0,0 +1,77 @@
+package com.ruoyi.common.utils.security;
+
+import org.apache.commons.lang3.StringUtils;
+import com.ruoyi.common.constant.PermissionConstants;
+import com.ruoyi.common.utils.MessageUtils;
+
+/**
+ * permission 工具类
+ * 
+ * @author ruoyi
+ */
+public class PermissionUtils
+{
+    /**
+     * 查看数据的权限
+     */
+    public static final String VIEW_PERMISSION = "no.view.permission";
+
+    /**
+     * 创建数据的权限
+     */
+    public static final String CREATE_PERMISSION = "no.create.permission";
+
+    /**
+     * 修改数据的权限
+     */
+    public static final String UPDATE_PERMISSION = "no.update.permission";
+
+    /**
+     * 删除数据的权限
+     */
+    public static final String DELETE_PERMISSION = "no.delete.permission";
+
+    /**
+     * 导出数据的权限
+     */
+    public static final String EXPORT_PERMISSION = "no.export.permission";
+
+    /**
+     * 其他数据的权限
+     */
+    public static final String PERMISSION = "no.permission";
+
+    /**
+     * 权限错误消息提醒
+     * 
+     * @param permissionsStr 错误信息
+     * @return 提示信息
+     */
+    public static String getMsg(String permissionsStr)
+    {
+        String permission = StringUtils.substringBetween(permissionsStr, "[", "]");
+        String msg = MessageUtils.message(PERMISSION, permission);
+        if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.ADD_PERMISSION))
+        {
+            msg = MessageUtils.message(CREATE_PERMISSION, permission);
+        }
+        else if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.EDIT_PERMISSION))
+        {
+            msg = MessageUtils.message(UPDATE_PERMISSION, permission);
+        }
+        else if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.REMOVE_PERMISSION))
+        {
+            msg = MessageUtils.message(DELETE_PERMISSION, permission);
+        }
+        else if (StringUtils.endsWithIgnoreCase(permission, PermissionConstants.EXPORT_PERMISSION))
+        {
+            msg = MessageUtils.message(EXPORT_PERMISSION, permission);
+        }
+        else if (StringUtils.endsWithAny(permission,
+                new String[] { PermissionConstants.VIEW_PERMISSION, PermissionConstants.LIST_PERMISSION }))
+        {
+            msg = MessageUtils.message(VIEW_PERMISSION, permission);
+        }
+        return msg;
+    }
+}