获取 java 错误：由更新版本的 Java 运行时编译（类文件版本 53.0）

Question

在这里，我正在使用 Maven 3.2.5 运行 JDK-8，我的代码构建正在成功

启动应用程序后，我收到以下错误：

Caused by: java.lang.UnsupportedClassVersionError: com/daimler/duke/common/faults/CommonServiceFacadeFault has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0
    at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_162]

我也对此进行了探讨，一些博客显示应用程序正在 Java 9 中编译，并尝试在 Java 8 中运行

我的 pom.xml 文件是：

<project>
.............
.............

    <properties>
        <tycho.version>1.2.0</tycho.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

<repositories>
  ...........
</repositories>
<pluginRepositories>
   ...........
</pluginRepositories>

    <build>
        <plugins>
            <plugin>
                <groupId>org.eclipse.tycho</groupId>
                <artifactId>tycho-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <groupId>org.eclipse.tycho</groupId>
                <artifactId>target-platform-configuration</artifactId>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jarsigner-plugin</artifactId>
            </plugin>
        </plugins>

        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.eclipse.tycho</groupId>
                    <artifactId>tycho-maven-plugin</artifactId>
                    <version>${tycho.version}</version>
                    <extensions>true</extensions>
                </plugin>
                <plugin>
                    <groupId>org.eclipse.tycho</groupId>
                    <artifactId>target-platform-configuration</artifactId>
                    <version>${tycho.version}</version>
                    <configuration>
                        <environments>
                            <environment>
                                <os>win32</os>
                                <ws>win32</ws>
                                <arch>x86_64</arch>
                            </environment>
                        </environments>

                        <dependency-resolution>
                            <extraRequirements>
                                <requirement>
                                    <type>eclipse-plugin</type>
                                    <id>org.eclipse.core.runtime</id>
                                    <versionRange>0.0.0</versionRange>
                                </requirement>
                                <requirement>
                                    <type>eclipse-plugin</type>
                                    <id>org.eclipse.ui.ide</id>
                                    <versionRange>0.0.0</versionRange>
                                </requirement>
                            </extraRequirements>
                        </dependency-resolution>
                    </configuration>
                </plugin>
                <plugin>
                    <groupId>org.eclipse.tycho</groupId>
                    <artifactId>tycho-packaging-plugin</artifactId>
                    <version>${tycho.version}</version>
                </plugin>
                <plugin>
                    <groupId>org.eclipse.tycho</groupId>
                    <artifactId>tycho-compiler-plugin</artifactId>
                    <configuration>
                        <compilerArgument>-warn:none</compilerArgument>
                        <compilerArgument>-err:none</compilerArgument>
                        <useProjectSettings>false</useProjectSettings>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

有没有人对此有想法？

注意：由于应用程序依赖性，我不能在这里使用 java 9。

Answer 1

修复 JDK 版本问题后，您需要运行clean任务以重新编译所有类：

mvn clean package

如果您不添加clean某些类不会被编译并且错误仍然存​​在。