Commit 80400d7

committed

Update spring-bean-validation.md

1 parent d20b180 commit 80400d7Copy full SHA for 80400d7

File tree

-1

lines changed

-1

lines changed

Lines changed: 7 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -520,11 +520,17 @@ public class PersonService {`
`520`	`520`
`521`	`521`	`代码地址:https://github.com/Snailclimb/springboot-guide/tree/master/source-code/advanced/bean-validation-demo`
`522`	`522`
	`523`	+## `@NotNull` vs `@Column(nullable = false)`(重要)
`523`	`524`
	`525`	+在使用 JPA 操作数据的时候会经常碰到 `@Column(nullable = false)` 这种类型的约束,那么它和 `@NotNull` 有何区别呢?搞清楚这个还是很重要的!
	`526`	`+`
	`527`	+- `@NotNull`是 JSR 303 Bean验证批注,它与数据库约束本身无关。
	`528`	+- `@Column(nullable = false)` : 是JPA声明列为非空的方法。
	`529`	`+`
	`530`	`+总结来说就是即前者用于验证,而后者则用于指示数据库创建表的时候对表的约束。`
`524`	`531`
`525`	`532`	`## TODO`
`526`	`533`
`527`		`-- [ ] JPA 数据库级别参数约束验证`
`528`	`534`	`- [ ] 原理分析`
`529`	`535`
`530`	`536`	`## 参考`

Comments

(0)