英文:
How to create custom annotation for StoredProcedure and Column in spring boot project?
问题
我需要为StoredProcedure和Column创建自定义注释。
示例：
@StoredProcedure带有三个参数，如query、structname、structArrayName
@Column有五个字段，如name、position、type、required。
有人可以帮我学习如何创建这些注释并应用于实体类吗？
英文:
I need to creat custom annotations for StoredProcedure & Column.
Example:
@StoredProcedure with three parameters like query,structname,structArrayName
and @Column with have five fields like name, postion, type, required.
Can anybody help me how create it and apply in entity class?
答案1
得分: -1
我们可以添加元注解来指定自定义注解的作用范围和目标。例如：
@Retention(RUNTIME)@Target(TYPE)public @interface StoredProcedure {String query ();String structName ();String structArrayName ();}@Retention(RetentionPolicy.RUNTIME)@Target(ElementType.FIELD)public @interface Column {public String name();public int position ();public String datePattern () default "MM/dd/yyyy HH:mm:ss.SSSSSS";public String defValue () default "";public boolean required () default false;public String actualType () default "na";}// 我们可以在类级别和字段级别应用注解。@StoredProcedure(query = "{}", structName = "", structArrayName = "")public class Data {@Column(name = "id", position = 1, actualType = "string", required = true)@Validate(length = )public String id;@Column(name = "name", position = 2, actualType = "number")@Validate(length = )public Long name;}
英文:
We can add meta-annotations to specify the scope and the target of our custom annotation.
Ex:
@Retention(RUNTIME)@Target(TYPE)public @interface StoredProcedure {String query ();String structName ();String structArrayName ();}@Retention(RetentionPolicy.RUNTIME)@Target(ElementType.FIELD)public @interface Column {public String name();public int position ();public String datePattern () default "MM/dd/yyyy HH:mm:ss.SSSSSS";public String defValue () default "";public boolean required () default false;public String actualType () default "na";}// we can apply annotations in class level and field level.@StoredProcedure(query = "{}", structName = "", structArrayName = "")public class Data {@Column(name = "id", position = 1, actualType = "string", required = true)@Validate(length = )public String id;@Column(name = "name", position = 2, actualType = "number")@Validate(length = )public Long name;}
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