解决Kotlin中的意外覆盖错误

feu*_*tos 14 spring-security kotlin

我最近开始使用Kotlin过期,并使用Kotlin开始了Spring Boot宠物项目.

我正在尝试将自定义用户域对象集成到Spring Security,因此希望实现UserDetails接口.

鉴于我的域用户对象如下:

import org.springframework.data.annotation.Id as DocumentId
import org.springframework.data.mongodb.core.mapping.Document
import org.springframework.security.core.GrantedAuthority
import org.springframework.security.core.authority.AuthorityUtils
import org.springframework.security.core.userdetails.UserDetails

@Document
data class User(@DocumentId val id: String? = null,
                val username: String = "",
                val password: String = "",
                val email: String = "",
                val name: String? = null,
                val surname: String? = null) : UserDetails {

    override fun isCredentialsNonExpired(): Boolean = true

    override fun isAccountNonExpired(): Boolean = true

    override fun isAccountNonLocked(): Boolean = true

    override fun getAuthorities(): MutableCollection<out GrantedAuthority> = AuthorityUtils.createAuthorityList("USER")

    override fun isEnabled(): Boolean = true
}
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我收到以下错误:

  1. 意外覆盖:以下声明具有相同的JVM签名(getUsername()Ljava/lang/String;):public final fun <get-username>():Kotlin.String,public abstract fun getUsername():Kotlin.String!

  2. 意外覆盖:以下声明具有相同的JVM签名(getPassword()Ljava/lang/String;):public final fun <get-password>():Kotlin.String,public abstract fun getPassword():Kotlin.String!

由于我的User类已经有一个方法getUsername():Kotlin.String也实现了方法getUsername():Kotlin.String!?

除了在属性的getter和setter上使用@JvmName之外,我该如何解决这样的错误?

Ale*_*lov 30

这里的问题是,从Kotlin的角度来看,属性获取器不可能从超类型覆盖函数.要解决此问题,可以通过private手动创建属性并从超类型实现所需方法来阻止编译器生成getter ,例如:

data class User(
    private val username: String = ""
    ...
): UserDetails {
    override fun getUsername() = username
    ...
}
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