折腾：
【已解决】java的spring boot程序报错：Parameter 0 of constructor in required a bean of type long that could not be found
期间，看到log中的建议：
Action: Consider defining a bean of type 'long' in your configuration. Consider adding @ConstructorBinding to com.crifan.xxx.Greeting if you intended to use constructor-based configuration property binding.
去试试加上@ConstructorBinding，结果出错：
去修复
就可以了。
再去运行看看
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2020-01-31 10:22:59.045 ERROR 12387 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'greeting': @EnableConfigurationProperties or @ConfigurationPropertiesScan must be used to add @ConstructorBinding type com.crifan.xxx.Greeting at org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.validate(ConfigurationPropertiesBeanDefinitionValidator.java:66) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.postProcessBeanFactory(ConfigurationPropertiesBeanDefinitionValidator.java:45) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:286) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:174) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at com.crifan.xxx.Greeting.main(Greeting.java:16) [classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_112] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.2.RELEASE.jar:2.2.2.RELEASE] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS
@EnableConfigurationProperties or @ConfigurationPropertiesScan must be used to add @ConstructorBinding type
想要试试
import org.springframework.boot.context.properties.EnableConfigurationProperties; @EnableConfigurationProperties(Greeting::class)
结果class报错
再去试试
import org.springframework.boot.context.properties.ConfigurationPropertiesScan; @ConfigurationPropertiesScan
结果：
变成别的错误了
✗ mvn spring-boot:run [INFO] Scanning for projects... [INFO] [INFO] -------------------< com.crifan:xxx >------------------- [INFO] Building xxx 0.0.1-SNAPSHOT [INFO] --------------------------------[ jar ]--------------------------------- [INFO] [INFO] >>> spring-boot-maven-plugin:2.2.2.RELEASE:run (default-cli) > test-compile @ xxx >>> [INFO] [INFO] --- maven-resources-plugin:3.1.0:resources (default-resources) @ xxx --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] Copying 1 resource [INFO] Copying 0 resource [INFO] [INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ xxx --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- maven-resources-plugin:3.1.0:testResources (default-testResources) @ xxx --- [INFO] Using 'UTF-8' encoding to copy filtered resources. [INFO] skip non existing resourceDirectory /Users/crifan/dev/dev_root/projects/xxx/src/server/xxx/xxx/src/test/resources [INFO] [INFO] --- maven-compiler-plugin:3.8.1:testCompile (default-testCompile) @ xxx --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] <<< spring-boot-maven-plugin:2.2.2.RELEASE:run (default-cli) < test-compile @ xxx <<< [INFO] [INFO] [INFO] --- spring-boot-maven-plugin:2.2.2.RELEASE:run (default-cli) @ xxx --- [INFO] Attaching agents: [] Exception in thread "main" java.lang.Error: Unresolved compilation problem: at com.crifan.xxx.Greeting.main(Greeting.java:17) [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 3.462 s [INFO] Finished at: 2020-01-31T10:39:06+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.2.2.RELEASE:run (default-cli) on project xxx: Application finished with exit code: 1 -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.2.2.RELEASE:run default-cli on project xxx: Application finished with exit code 1 Help 1
说是Spring Boot 2.2，无需再加上
- @Component
- @Configuration
- @EnableConfigurationProperties
所以去掉，变成：
// @Configuration
@ConfigurationProperties("id")
@SpringBootApplication
@ConstructorBinding
// @EnableConfigurationProperties(Greeting::class)
@ConfigurationPropertiesScan
public class Greeting {结果：
出现之前的错误，所以还是改回去，加上@Configuration
但是又始终出现之前的错误：
2020-01-31 10:47:52.700 ERROR 13660 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'greeting': @EnableConfigurationProperties or @ConfigurationPropertiesScan must be used to add @ConstructorBinding type com.crifan.xxx.Greeting at org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.validate(ConfigurationPropertiesBeanDefinitionValidator.java:66) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.context.properties.ConfigurationPropertiesBeanDefinitionValidator.postProcessBeanFactory(ConfigurationPropertiesBeanDefinitionValidator.java:45) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:286) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:174) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:706) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.2.2.RELEASE.jar:5.2.2.RELEASE] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE] at com.crifan.xxx.Greeting.main(Greeting.java:20) [classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_112] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_112] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_112] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_112] at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.2.2.RELEASE.jar:2.2.2.RELEASE] [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESS
很是奇怪啊
感觉有缓存？
故意弄个语法错误：
@ConfigurationP roperties("id")结果报错倒是和之前上面的错误一样了：
[INFO] --- spring-boot-maven-plugin:2.2.2.RELEASE:run (default-cli) @ xxx --- [INFO] Attaching agents: [] Exception in thread "main" java.lang.Error: Unresolved compilation problem: at com.crifan.xxx.Greeting.main(Greeting.java:19) [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 2.949 s [INFO] Finished at: 2020-01-31T10:49:06+08:00 [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.2.2.RELEASE:run (default-cli) on project xxx: Application finished with exit code: 1 -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
所以貌似上面这个错误，则表示是语法错误？
恢复
@ConfigurationProperties("id")结果：
还是之前错误
2020-01-31 10:51:07.035 ERROR 13937 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'greeting': @EnableConfigurationProperties or @ConfigurationPropertiesScan must be used to add @ConstructorBinding type com.crifan.xxx.Greeting
即：加上了
@ConfigurationPropertiesScan
感觉没效果。
EnableConfigurationProperties or ConfigurationPropertiesScan must be used to add ConstructorBinding type
只保留
@ConfigurationProperties("id")结果：
2020-01-31 10:55:27.650 ERROR 14226 --- [ restartedMain] o.s.boot.SpringApplication : Application run failed org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.context.ApplicationContextException: Unable to start ServletWebServerApplicationContext due to missing ServletWebServerFactory bean. at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:156) ~[spring-boot-2.2.2.RELEASE.jar:2.2.2.RELEASE]
“org.springframework.boot.context.properties
Annotation Type ConfigurationProperties
*
@Target(value={TYPE,METHOD})
@Retention(value=RUNTIME)
@Documented
public @interface ConfigurationProperties
Annotation for externalized configuration. Add this to a class definition or a @Bean method in a @Configuration class if you want to bind and validate some external Properties (e.g. from a .properties file).
Binding is either performed by calling setters on the annotated class or, if @ConstructorBinding is in use, by binding to the constructor parameters.
Note that contrary to @Value, SpEL expressions are not evaluated since property values are externalized.
Since:
1.0.0
Author:
Dave Syer
See Also:
ConfigurationPropertiesScan, ConstructorBinding, ConfigurationPropertiesBindingPostProcessor, EnableConfigurationProperties”
算了，回去参考之前官网教程
@SpringBootApplication
= @EnableAutoConfiguration + @ComponentScan + @Configuration
->
- @EnableAutoConfiguration
- enable Spring Boot’s auto-configuration mechanism
- @ComponentScan
- enable @Component scan on the package where the application is located (see the best practices)
- @Configuration
- allow to register extra beans in the context or import additional configuration classes
【总结】
此处尝试通过添加
- @ConstructorBinding
- @EnableConfigurationProperties
- @ConfigurationPropertiesScan
- @ConfigurationProperties(“id”)
等写法，都还是没有解决问题。
最后是：
不该给此处的Greeting.java加@SpringBootApplication的，而是
另外单独新建一个java文件
ServingWebContentApplication.java
package com.crifan.xxx;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class ServingWebContentApplication {
public static void main(String[] args) {
SpringApplication.run(ServingWebContentApplication.class, args);
}
}用于启动服务。就可以了。
具体情况详见：
【已解决】java的spring boot程序报错：Parameter 0 of constructor in required a bean of type long that could not be found
转载请注明：在路上 » 【无法解决】spring boot尝试添加@ConstructorBinding以解决错误Parameter 0 of constructor in required a bean of type