新增Sql构造器工厂，解耦Sql构造器实现与使用者关系

src/main/java/com/lq/code/util/sql/factory/DbBuilerFactory.java

@@ -0,0 +1,12 @@
+package com.lq.code.util.sql.factory;
+
+import com.lq.code.util.sql.AbstractDbBuiler;
+
+/**
+ * Sql 工厂
+ * @author qi
+ */
+public interface DbBuilerFactory {
+
+    AbstractDbBuiler getSqlBuilder(String dbType);
+}

src/main/java/com/lq/code/util/sql/factory/impl/DefaultDbBuilerFactory.java

@@ -0,0 +1,29 @@
+package com.lq.code.util.sql.factory.impl;
+
+import com.lq.code.util.sql.AbstractDbBuiler;
+import com.lq.code.util.sql.MysqlBuilder;
+import com.lq.code.util.sql.OracleBuiler;
+import com.lq.code.util.sql.SqlConstant;
+import com.lq.code.util.sql.factory.DbBuilerFactory;
+
+/**
+ *  @author qi
+ *  dbBuilfer 生产工厂模式默认实现
+ */
+public class DefaultDbBuilerFactory implements DbBuilerFactory {
+
+    @Override
+    public AbstractDbBuiler getSqlBuilder(String dbType) {
+        AbstractDbBuiler abstractDbBuiler = null;
+        switch (dbType){
+            case SqlConstant
+                    .DB_TYPE_MYSQL:
+                abstractDbBuiler = new MysqlBuilder();
+            break;
+            case SqlConstant.DB_TYPE_ORACLE:
+                abstractDbBuiler = new OracleBuiler();
+                break;
+        }
+        return abstractDbBuiler;
+    }
+}