自6.1 《参数名称保留
LocalVariableTableParameterNameDiscoverer 已在 6.1 中删除。”
即使在java编译器中使用-parameters，我们也无法再做这样的事情了
@CustomAnnotation(projectIdParameter = "projectId", userIdParameter = "#userEntity.id")
public ProjectEntity getProject(UserEntity userEntity, String projectId)
因为在@传入JoinPoint之前，我们以前可以这样做
joinPoint.getSignature().getParameterNames()
但是 getParameterNames() 不再可用，并且如果您将 getSignature 转换为 MethodSignature，getParameterNames 现在返回 null。
我们要做的就是将方面的功能放入之前注释的每个方法中。我们喜欢使用 AOP 来解决这些安全类型问题，但不确定如何让它适应 Spring 中的更改。
我们是否可以保留 AOP 方法？
即使在 java 编译器中使用 -parameters，我们也不再能够做这样的事情......
那么你就做错了。无论是从 Maven 还是自动导入 Maven 项目并从 IntelliJ IDEA 运行时，这都可以正常工作：
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>spring-boot-sample</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<groovy.version>4.0.19</groovy.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.gmavenplus</groupId>
<artifactId>gmavenplus-plugin</artifactId>
<version>3.0.2</version>
<executions>
<execution>
<goals>
<goal>execute</goal>
<goal>addSources</goal>
<goal>addTestSources</goal>
<goal>generateStubs</goal>
<goal>compile</goal>
<goal>generateTestStubs</goal>
<goal>compileTests</goal>
<goal>removeStubs</goal>
<goal>removeTestStubs</goal>
</goals>
</execution>
</executions>
<configuration>
<parameters>true</parameters>
<verbose>true</verbose>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.12.1</version>
<configuration>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.2.0</version>
<executions>
<execution>
<phase>verify</phase>
<goals>
<goal>java</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>com.example.Application</mainClass>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>3.2.3</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
<version>3.2.3</version>
</dependency>
<dependency>
<groupId>org.apache.groovy</groupId>
<artifactId>groovy</artifactId>
<version>${groovy.version}</version>
</dependency>
</dependencies>
</project>
package com.example;
public @interface CustomAnnotation {
String projectIdParameter();
String userIdParameter();
}
package com.example;
import org.springframework.stereotype.Service;
@Service
public class SampleService {
@CustomAnnotation(projectIdParameter = "projectId", userIdParameter = "#userEntity.id")
public void doSomething(int foo, String bar, Object zot) {
System.out.println("Doing something in service method");
}
}
package com.example
import org.springframework.stereotype.Service
@Service
class GroovyService {
@CustomAnnotation(projectIdParameter = "projectId", userIdParameter = "#userEntity.id")
void doSomething(int foo, String bar, Object zot) {
System.out.println("Doing something in Groovy service method")
}
}
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
try (ConfigurableApplicationContext applicationContext = SpringApplication.run(Application.class, args)) {
applicationContext.getBean(SampleService.class).doSomething(11, "dummy", new Integer(42));
applicationContext.getBean(GroovyService.class).doSomething(11, "dummy", new Integer(42));
}
}
}
package com.example;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import java.util.Arrays;
@Aspect
@Component
public class SampleAspect {
@Before("@annotation(CustomAnnotation)")
public void beforeServiceMethodExecution(JoinPoint joinPoint) {
System.out.println(joinPoint);
System.out.println(
Arrays.toString(
((MethodSignature) joinPoint.getSignature()).getParameterNames()
)
);
}
}
控制台日志：
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v3.2.3)
2024-03-09T14:53:30.327+01:00 INFO 14188 --- [ main] com.example.Application : Starting Application using Java 21 with PID 14188 (C:\Users\Alexander\Documents\java-src\SO_AJ_Spring61ParameterNames_78129715\target\classes started by Alexander in C:\Users\Alexander\Documents\java-src\SO_AJ_Spring61ParameterNames_78129715)
2024-03-09T14:53:30.329+01:00 INFO 14188 --- [ main] com.example.Application : No active profile set, falling back to 1 default profile: "default"
2024-03-09T14:53:31.201+01:00 INFO 14188 --- [ main] com.example.Application : Started Application in 1.193 seconds (process running for 1.734)
execution(void com.example.SampleService.doSomething(int,String,Object))
[foo, bar, zot]
Doing something in service method
execution(void com.example.GroovyService.doSomething(int,String,Object))
[foo, bar, zot]
Doing something in Groovy service method
Spring Boot 3.2.3、Spring 6.1.4、JDK 21、Groovy 4.0.19。