diff --git a/SQL_Parser_Parameterize.md b/SQL_Parser_Parameterize.md
index f9ee0a4..4451e00 100644
--- a/SQL_Parser_Parameterize.md
+++ b/SQL_Parser_Parameterize.md
@@ -8,3 +8,16 @@ select * from t where id = 2
 // 参数化SQL
 select * from t where id = ?
 ```
+
+# 2. 参数化
+```java
+import com.alibaba.druid.sql.visitor.ParameterizedOutputVisitorUtils;
+
+final String dbType = JdbcConstants.MYSQL;
+
+String sql = "select * from t where id = 1 or id = 2 or id = 3";
+String psql = ParameterizedOutputVisitorUtils.parameterize(sql, dbType);
+assertEquals("SELECT *\n" +
+        "FROM t\n" +
+        "WHERE id = ?", psql);
+```
\ No newline at end of file