无法在启动Spring应用程序期间注入MapStruct接口。

huangapple
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英文:

Cannot inject mapstruct interface during startup spring application

问题

我有以下的映射器（mapstruct版本1.3.1.Final）。

  1. @Mapper(componentModel = "spring", uses = {}, unmappedTargetPolicy = ReportingPolicy.WARN)
  2. public interface AccountMapper {
  3.     @Mapping(source = "registrationDto.email", target = "email")
  4.     @Mapping(source = "passwordDto.hashPassword", target = "password")
  5.     Account from(RegistrationDto registrationDto, PasswordDto passwordDto);
  6. }

当我尝试运行Spring应用程序时，出现了与Mapper关联的Bean找不到的问题。

  1. com.xx.xx.Controller的构造函数中的参数1需要一个类型为'com.xxx.AccountMapper'的Bean，但找不到。
  2. 请考虑在您的配置中定义一个类型为'com.xxx.AccountMapper'的Bean。

我尝试了使用装饰器的解决方案。通过为接口添加@DecoratedWith(AccountMapperDecorator.class)注解，并创建以下类。

  1. @Component
  2. public abstract class AccountMapperDecorator implements AccountMapper {
  4.     @Autowired
  5.     @Qualifier("delegate")
  6.     private AccountMapper delegate;
  8.     @Override
  9.     public Account from(RegistrationDto registrationDto, PasswordDto passwordDto) {
  10.         return delegate.from(registrationDto, passwordDto);
  11.     }
  12. }

然后我收到了以下错误信息。

  1. 没有找到类型为'com.xxx.AccountMapper'的合格Bean：期望至少有1个合格的自动装配候选Bean。
  2. 依赖注解：{@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value="delegate")}

在这种情况下可能出现的问题是什么？

英文:

I have the following mapper (mapstruct version 1.3.1.Final).

  1. @Mapper(componentModel = "spring", uses = {}, unmappedTargetPolicy = ReportingPolicy.WARN)
  2. public interface AccountMapper {
  3.     @Mapping(source = "registrationDto.email", target = "email")
  4.     @Mapping(source = "passwordDto.hashPassword", target = "password")
  5.     Account from(RegistrationDto registrationDto, PasswordDto passwordDto);
  6. }

When I attempt to run spring application I got the problem that bean associated with Mapper is not found.

  1. Parameter 1 of constructor in com.xx.xx.Controller required a bean of type 'com.xxx.AccountMapper' that could not be found.
  3. Consider defining a bean of type 'com.xxx.AccountMapper' in your configuration.

I tried solution with decorator. By adding annotation @DecoratedWith(AccountMapperDecorator.class) for interface and creating the following class.

  1. @Component
  2. public abstract class AccountMapperDecorator implements AccountMapper {
  4.     @Autowired
  5.     @Qualifier("delegate")
  6.     private AccountMapper delegate;
  8.     @Override
  9.     public Account from(RegistrationDto registrationDto, PasswordDto passwordDto) {
  10.         return delegate.from(registrationDto, passwordDto);
  11.     }
  12. }

And then I receive.

  1. No qualifying bean of type 'com.xxx.AccountMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true), @org.springframework.beans.factory.annotation.Qualifier(value="delegate")}

What could be the problem in that case ?

答案1

得分: 2

你是否运行过 mvn package？
当你在你的集成开发环境中搜索类 AccountMapperImpl 时，能找到它吗？如果找不到，那是个问题。如果你找不到它，Spring 也会找不到。

也许你忘记在你的 pom.xml 中配置（或配置错误）mapstruct-processor？你的 pom.xml 中是否有类似这样的内容：

  1. <plugin>
  2.     <groupId>org.apache.maven.plugins</groupId>
  3.     <artifactId>maven-compiler-plugin</artifactId>
  4.     <version>3.5.1</version>
  5.     <configuration>
  6.         <source>1.8</source>
  7.         <target>1.8</target>
  8.         <annotationProcessorPaths>
  9.             <path>
  10.                 <groupId>org.mapstruct</groupId>
  11.                 <artifactId>mapstruct-processor</artifactId>
  12.                 <version>...</version>
  13.             </path>
  14.         </annotationProcessorPaths>
  15.     </configuration>
  16. </plugin>

在这里吗？

英文:

Did you run mvn package?
When you search for class AccountMapperImpl in your IDE, can you find it? If not that is a problem. If you can't find it, Spring won't too.

Maybe you forgot to configure (or misconfigured) mapstruct-processor in your pom.xml? Do you have something like:

  1. &lt;plugin&gt;
  2.     &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
  3.     &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
  4.     &lt;version&gt;3.5.1&lt;/version&gt;
  5.     &lt;configuration&gt;
  6.         &lt;source&gt;1.8&lt;/source&gt;
  7.         &lt;target&gt;1.8&lt;/target&gt;
  8.         &lt;annotationProcessorPaths&gt;
  9.             &lt;path&gt;
  10.                 &lt;groupId&gt;org.mapstruct&lt;/groupId&gt;
  11.                 &lt;artifactId&gt;mapstruct-processor&lt;/artifactId&gt;
  12.                 &lt;version&gt;...&lt;/version&gt;
  13.             &lt;/path&gt;
  14.         &lt;/annotationProcessorPaths&gt;
  15.     &lt;/configuration&gt;
  16. &lt;/plugin&gt;

there?

答案2

得分: 0

这是一个时常发生的情况，
如果你注意到了，那么可能 AccountMapperImpl 没有生成到 target/build 文件夹中
有几种方法可以解决这个问题：

  • 尝试清理 out/build 目录

  • 运行 mvn clean compile 或者 gradle clean compileJava

  • 设置你的 IDE 使用 maven/gradle 来运行你的代码
    无法在启动Spring应用程序期间注入MapStruct接口。

  • 确保启用了 注解处理（Annotation Processing）

英文:

This is a situation that happens from time to time,<br>
If you will noticed then probebly the AccountMapperImpl isn't generated to the target/build folders
There a few ways to fix that:

  • Try clean the out/build directories
  • Run mvn clean compile or gradle clean compileJava
  • Set your IDE to run your code with maven/gradle
    无法在启动Spring应用程序期间注入MapStruct接口。
  • Be sure that Annotation Processing is enabled

huangapple
  • 本文由 发表于 2020年9月8日 14:35:50
  • 转载请务必保留本文链接：https://go.coder-hub.com/63788313.html
  • java
  • mapstruct
  • spring
  • spring-boot
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