Question

我对Kotlin还是很陌生，所以我正在做rest api docker容器。这是我的gradle版本：

buildscript {
    ext {
        kotlinVersion = '1.2.51'
        springBootVersion = '2.0.4.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:${kotlinVersion}")
        classpath("org.jetbrains.kotlin:kotlin-allopen:${kotlinVersion}")
        classpath("org.jetbrains.kotlin:kotlin-noarg:${kotlinVersion}")

        // add docker dependency
        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.0.3.RELEASE")
        // using Gradle you need to add a new docker plugin like this:
        classpath('se.transmode.gradle:gradle-docker:1.2')
    }
}
apply plugin: 'kotlin-jpa'
apply plugin: 'kotlin'
apply plugin: 'kotlin-spring'
apply plugin: 'eclipse-wtp'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'war'
// apply this docker plugin
apply plugin: 'docker'

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8
compileKotlin {
    kotlinOptions {
        freeCompilerArgs = ["-Xjsr305=strict"]
        jvmTarget = "1.8"
    }
}
compileTestKotlin {
    kotlinOptions {
        freeCompilerArgs = ["-Xjsr305=strict"]
        jvmTarget = "1.8"
    }
}

repositories {
    mavenCentral()
}

configurations {
    providedRuntime
}

dependencies {
    compile 'mysql:mysql-connector-java'
    compile('org.springframework.boot:spring-boot-starter-data-rest')
    implementation("org.springframework.boot:spring-boot-starter-data-jpa")

    compile('org.springframework.boot:spring-boot-starter-web')
    compile('com.fasterxml.jackson.module:jackson-module-kotlin')
    compile("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
    compile("org.jetbrains.kotlin:kotlin-reflect")
    providedRuntime('org.springframework.boot:spring-boot-starter-tomcat')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

// write this docker build task, this will run just after "./gradlew build" command
task buildDocker(type: Docker, dependsOn: build) {
    push = true
    applicationName = bootJar.baseName
    dockerfile = file('Dockerfile')
    doFirst {
        copy {
            from jar
            into stageDir
        }
    }
}

POJO：

package com.model

import javax.persistence.*
import javax.validation.constraints.NotBlank
import javax.validation.constraints.NotNull

@Entity
data class Admin(@Id
                 @GeneratedValue(strategy = GenerationType.IDENTITY)
                 @get: NotNull
                 var userID: Long,
                 @get: NotBlank
                 var username: String,
                 @get: NotBlank
                 var password: String,
                 @get: NotBlank
                 var registerData: String,
                 @get: NotBlank
                 var email: String)

存储库：

package com.repository
import com.model.Admin
import org.springframework.data.jpa.repository.JpaRepository
import org.springframework.stereotype.Repository

@Repository
interface AdminRepository : JpaRepository<Admin?, Long>

所以当我尝试GET / POST时说：

没有实体的默认构造函数：：com.model.Admin;嵌套的异常是org.hibernate.InstantiationException：实体的默认构造函数：com.model.Admin

出什么问题了？我很困惑...

为什么Kotlin-Springboot返回错误：没有实体的构造函数，如果存在的话？

0 个答案: