add a method ADD_ROW() to support multi INTO_VALUES() in a single insert

Author: jingwenlqh

src/main/java/org/apache/ibatis/jdbc/AbstractSQL.java

@@ -79,8 +79,15 @@ public T INTO_COLUMNS(String... columns) {
    * @since 3.4.2
    */
   public T INTO_VALUES(String... values) {
-    sql().values.add(Arrays.asList(values));
-    return getSelf();
+      List<List<String>> list = sql().values;
+      if(list.isEmpty()){
+          list.add(new ArrayList<>());
+      }
+      int index = list.size() - 1;
+      for (String value : values) {
+          list.get(index).add(value);
+      }
+      return getSelf();
   }
 
   public T SELECT(String columns) {
@@ -263,6 +270,11 @@ public T ORDER_BY(String... columns) {
     return getSelf();
   }
 
+  public T ADD_ROW(){
+    sql().values.add(new ArrayList<>());
+    return getSelf();
+  }
+
   private SQLStatement sql() {
     return sql;
   }

src/test/java/org/apache/ibatis/jdbc/SQLTest.java

@@ -311,6 +311,7 @@ public void supportBatchInsert(){
       INSERT_INTO("table1 a");
       INTO_COLUMNS("col1,col2");
       INTO_VALUES("val1","val2");
+      ADD_ROW();
       INTO_VALUES("val1","val2");
     }};
     assertThat(sql.toString()).isEqualToIgnoringWhitespace("INSERT INTO table1 a (col1,col2) VALUES (val1,val2), (val1,val2)");
@@ -325,4 +326,12 @@ public void singleInsert(){
     }};
     assertThat(sql.toString()).isEqualToIgnoringWhitespace("INSERT INTO table1 a (col1,col2) VALUES (val1,val2)");
   }
+
+  @Test
+  public void singleInsertWithMultipleInsertValues(){
+      final String sql = new SQL() {{
+          INSERT_INTO("TABLE_A").INTO_COLUMNS("a", "b").INTO_VALUES("#{a}").INTO_VALUES("#{b}");
+      }}.toString();
+      System.out.println(sql.toString());
+  }
 }