bugfix[issues#16]:修复选择返回插件对于自定义column异常问题，不能直接使用resultType而只能使用resultMap进行

src/test/java/com/itfsw/mybatis/generator/plugins/SelectSelectivePluginTest.java

@@ -82,6 +82,9 @@ public class SelectSelectivePluginTest {
                 Assert.assertEquals(list.size(), 3);
                 int index = 0;
                 for (Object obj : list) {
+                    if (index == 1) {
+                        Assert.assertNull(obj);
+                    } else {
                         ObjectUtil objectUtil = new ObjectUtil(obj);
                         // 没有查询这两个字段
                         if (objectUtil.get("id") != null || objectUtil.get("field2") != null) {
@@ -89,11 +92,10 @@ public class SelectSelectivePluginTest {
                         }
                         if (index == 0) {
                             Assert.assertEquals(objectUtil.get("field1"), "fd1");
-                    } else if (index == 1) {
-                        Assert.assertNull(objectUtil.get("field1"));
                         } else {
                             Assert.assertEquals(objectUtil.get("field1"), "fd3");
                         }
+                    }
 
                     index++;
                 }