无法使受保护的最终 java.lang.Class java.lang.ClassLoader.defineClass

Question

目前我正在关注此 youtube 上的课程视频：https://www.youtube.com/watch?v
=BHoiNd64w0c&list=PLQag1tT77Ben3dupVMgYtoi_PVVQVRdD6&index=13 一切正常，我通过单击 Eclipse 中的播放按钮来运行我的项目，导师的操作有点不同，因为他使用sts工具。right click > run as > maven install
但是当尝试基于这个问题How to fix "Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass?时会发生错误，我已经使用了较新的 spring 版本。这是我的 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.7</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>java-login-security</groupId>
    <artifactId>login-system</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>login-system</name>
    <description>login system</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jasper</artifactId>
            <version>9.0.70</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

这里有更多错误日志：

 .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.7.7)

2023-01-14 12:19:00.834  INFO 2373 --- [           main] j.l.LoginSystemApplicationTests          : Starting LoginSystemApplicationTests using Java 17.0.4.1 on dna with PID 2373 (started by dna in /media/dna/data/koding/java/login-system)
2023-01-14 12:19:00.835  INFO 2373 --- [           main] j.l.LoginSystemApplicationTests          : No active profile set, falling back to 1 default profile: "default"
2023-01-14 12:19:01.333  INFO 2373 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-01-14 12:19:01.380  INFO 2373 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 41 ms. Found 1 JPA repository interfaces.
2023-01-14 12:19:01.530 ERROR 2373 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.cglib.core.CodeGenerationException: java.lang.reflect.InaccessibleObjectException-->Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @78dd667e
    at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:598) ~[spring-core-5.3.24.jar:5.3.24]
    at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363) ~[spring-core-5.3.24.jar:5.3.24]
// ...more error log here...

我的java版本：

 .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.7.7)

2023-01-14 12:19:00.834  INFO 2373 --- [           main] j.l.LoginSystemApplicationTests          : Starting LoginSystemApplicationTests using Java 17.0.4.1 on dna with PID 2373 (started by dna in /media/dna/data/koding/java/login-system)
2023-01-14 12:19:00.835  INFO 2373 --- [           main] j.l.LoginSystemApplicationTests          : No active profile set, falling back to 1 default profile: "default"
2023-01-14 12:19:01.333  INFO 2373 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2023-01-14 12:19:01.380  INFO 2373 --- [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 41 ms. Found 1 JPA repository interfaces.
2023-01-14 12:19:01.530 ERROR 2373 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.cglib.core.CodeGenerationException: java.lang.reflect.InaccessibleObjectException-->Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @78dd667e
    at org.springframework.cglib.core.ReflectUtils.defineClass(ReflectUtils.java:598) ~[spring-core-5.3.24.jar:5.3.24]
    at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:363) ~[spring-core-5.3.24.jar:5.3.24]
// ...more error log here...

[更新]你可以在这里检查我的项目： https ://github.com/dhanyn10/java/tree/main/login-system

Answer 1

我遇到过同样的问题。这是因为我的项目是用 Java 8 编写的，但我尝试在 Java 17 中启动。我刚刚将 IntelliJ 中的 Build&Run 配置从 SDK 17 更改为正确的 Java 版本 8 并且它有效。也许您使用了另一个 Java 版本在 IntelliJ 中构建项目。

这是配置屏幕截图。