JPA SqlResultSetMapping对象顺序

Question

JPA：如果在@SqlResultSetMapping中定义了类，实体和列，返回的对象的顺序是什么？

@SqlResultSetMapping(
       name="CustomerDetailsResult",
       classes={
          @ConstructorResult(
               targetClass=com.example.Customer.class,
                 columns={
                    @ColumnResult(name="id"),
                    @ColumnResult(name="name"),
                 }
          )
       },
       entities={ 
            @EntityResult(entityClass=com.example.Order.class, fields={
                @FieldResult(name="id", column="order_id"),
                @FieldResult(name="quantity", column="order_quantity"), 
                @FieldResult(name="item", column="order_item")})},
        columns={
            @ColumnResult(name="item_name")}
      )

结果行是Object [] {customer，order，scalar_value}或Object [] {order，scalar_value，customer}等。

Answer 1

结果将包含您在@SqlResultSetMapping中定义的对象。

在你的情况下：

    for (int i = 0; i < obj.length(); i++) {
    //getting the json object of the particular index inside the array
     JSONObject heroObject = obj.getJSONObject(i);
     String aka=heroObject.getString("your key here");
}