diff --git a/api-boot-samples/api-boot-sample-http-converter/src/main/java/org/minbox/framework/api/boot/sample/MD5Util.java b/api-boot-samples/api-boot-sample-http-converter/src/main/java/org/minbox/framework/api/boot/sample/MD5Util.java
new file mode 100644
index 0000000000000000000000000000000000000000..9f961bc4b718f97c7bfde32c5de73d053346f902
--- /dev/null
+++ b/api-boot-samples/api-boot-sample-http-converter/src/main/java/org/minbox/framework/api/boot/sample/MD5Util.java
@@ -0,0 +1,34 @@
+package org.minbox.framework.api.boot.sample;
+
+import java.security.MessageDigest;
+
+public class MD5Util {
+
+	public final static String MD5(String s) {
+		char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+				'A', 'B', 'C', 'D', 'E', 'F' };
+
+		try {
+			byte[] btInput = s.getBytes();
+			// 获得MD5摘要算法的 MessageDigest 对象
+			MessageDigest mdInst = MessageDigest.getInstance("MD5");
+			// 使用指定的字节更新摘要
+			mdInst.update(btInput);
+			// 获得密文
+			byte[] md = mdInst.digest();
+			// 把密文转换成十六进制的字符串形式
+			int j = md.length;
+			char str[] = new char[j * 2];
+			int k = 0;
+			for (int i = 0; i < j; i++) {
+				byte byte0 = md[i];
+				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
+				str[k++] = hexDigits[byte0 & 0xf];
+			}
+			return new String(str);
+		} catch (Exception e) {
+			e.printStackTrace();
+			return null;
+		}
+	}
+}
diff --git a/api-boot-samples/api-boot-sample-mybatis-enhance/src/main/java/org/minbox/framework/api/boot/sample/mybatis/enhance/dsl/DSystemUser.java b/api-boot-samples/api-boot-sample-mybatis-enhance/src/main/java/org/minbox/framework/api/boot/sample/mybatis/enhance/dsl/DSystemUser.java
index 9906315ad86601a4f81f542d886e10c4c6213409..8d7f6486942938504e81a6c26e7dde9d4af2a816 100644
--- a/api-boot-samples/api-boot-sample-mybatis-enhance/src/main/java/org/minbox/framework/api/boot/sample/mybatis/enhance/dsl/DSystemUser.java
+++ b/api-boot-samples/api-boot-sample-mybatis-enhance/src/main/java/org/minbox/framework/api/boot/sample/mybatis/enhance/dsl/DSystemUser.java
@@ -36,6 +36,7 @@ public class DSystemUser extends TableExpression<SystemUser> {
         return new DSystemUser("iot_system_user");
     }
 
+
     /**
      * 主键
      */