沒有使用Kotlin的JPA實體的默認構造函數，即使使用noarg插件

我已閱讀，您需要kotlin-maven-noarg實體類的編譯器插件，以便它生成默認參數少的cosntructor。沒有使用Kotlin的JPA實體的默認構造函數，即使使用noarg插件

但應用不與下面的錯誤啓動：

No default constructor for entity

你能告訴我什麼我做錯了嗎？

的pom.xml：

<?xml version="1.0" encoding="UTF-8"?> 
<project xmlns="http://maven.apache.org/POM/4.0.0" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 
    <modelVersion>4.0.0</modelVersion> 
    {...} 
    <build> 
     <sourceDirectory>src/main/java</sourceDirectory> 
     <resources> 
      <resource> 
       <directory>src/main/resources</directory> 
      </resource> 
     </resources> 

     <testSourceDirectory>src/test/java</testSourceDirectory> 
     <testResources> 
      <testResource> 
       <directory>src/test/resources</directory> 
      </testResource> 
     </testResources> 
     <plugins> 
      <plugin> 
       <artifactId>maven-compiler-plugin</artifactId> 
       <version>3.1</version> 
       <configuration> 
        <source>1.8</source> 
        <target>1.8</target> 
       </configuration> 
      </plugin> 
      <plugin> 
       <groupId>org.jetbrains.kotlin</groupId> 
       <artifactId>kotlin-maven-plugin</artifactId> 
       <version>${kotlin.version}</version> 
       <executions> 
        <execution> 
         <id>compile</id> 
         <phase>compile</phase> 
         <goals> 
          <goal>compile</goal> 
         </goals> 
        </execution> 
        <execution> 
         <id>test-compile</id> 
         <phase>test-compile</phase> 
         <goals> 
          <goal>test-compile</goal> 
         </goals> 
        </execution> 
       </executions> 
      </plugin> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-compiler-plugin</artifactId> 
       <executions> 
        <execution> 
         <id>compile</id> 
         <phase>compile</phase> 
         <goals> 
          <goal>compile</goal> 
         </goals> 
        </execution> 
        <execution> 
         <id>testCompile</id> 
         <phase>test-compile</phase> 
         <goals> 
          <goal>testCompile</goal> 
         </goals> 
        </execution> 
       </executions> 
      </plugin> 
      <plugin> 
       <artifactId>kotlin-maven-plugin</artifactId> 
       <groupId>org.jetbrains.kotlin</groupId> 
       <version>${kotlin.version}</version> 

       <configuration> 
        <compilerPlugins> 
         <plugin>jpa</plugin> 
        </compilerPlugins> 

        <pluginOptions> 
         <option>jpa:annotation=javax.persistence.Entity</option> 
        </pluginOptions> 
       </configuration> 

       <dependencies> 
        <dependency> 
         <groupId>org.jetbrains.kotlin</groupId> 
         <artifactId>kotlin-maven-noarg</artifactId> 
         <version>${kotlin.version}</version> 
        </dependency> 
       </dependencies> 
      </plugin> 

     </plugins> 
    </build> 

    <properties> 
     {...} 
     <junit.version>4.12</junit.version> 
     <kotlin.version>1.1.0</kotlin.version> 
    </properties> 

     {...} 

     <dependency> 
      <groupId>org.jetbrains.kotlin</groupId> 
      <artifactId>kotlin-stdlib</artifactId> 
      <version>${kotlin.version}</version> 
     </dependency> 
     <dependency> 
      <groupId>org.jetbrains.kotlin</groupId> 
      <artifactId>kotlin-test</artifactId> 
      <version>${kotlin.version}</version> 
      <scope>test</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.jetbrains.kotlin</groupId> 
      <artifactId>kotlin-reflect</artifactId> 
      <version>${kotlin.version}</version> 
     </dependency> 

    </dependencies> 

</project>

測試類：

@RunWith(SpringJUnit4ClassRunner::class) 
@ContextConfiguration(classes = arrayOf(VedicaConfig::class)) 
class InitStructures { 
    private var vedicaDBInit: VedicaDBInit? = null 

    @Before 
    fun init() { 
     vedicaDBInit = VedicaDBInit() 
    } 

    @Test 
    fun initClientFolders() { 
    } 
}

我使用的IntelliJ IDEA與科特林1.1.0，所以對於我的部署只需點擊調試/運行使用Tomcat運行配置選擇並運行測試我只需右鍵單擊測試類，並單擊運行/調試。

來源

2017-04-02 greengold

有默認的構造函數，如果你使用的是無參數的插件，但問題是隻能通過反射來訪問，因爲它在編譯的時候產生的。 – Stepango