Intellij maven project 致命错误编译: 无效标志: —— release

我想从 Intellij 的 Spring-boot Maven 开始 请帮助我，我正在得到错误:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project spring-rest: Fatal error compiling: invalid flag: --release -> [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
Process finished with exit code 1

我的 pom.xml 是:

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>


<groupId>com.example</groupId>
<artifactId>spring-rest</artifactId>
<version>3.1.3.RELEASE</version>
<packaging>war</packaging>


<name>spring-rest</name>
<description>Demo project for Spring Boot</description>


<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>


<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>


<dependencies>


<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>2.0.0.RELEASE</version>
</dependency>


<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>


<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>


<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>RELEASE</version>
</dependency>




<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>


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


<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<release>8</release>
<verbose>true</verbose>
</configuration>
</plugin>
</plugins>
</build>


</project>
114632 次浏览
小开

In your pom.xml file, simply remove the tag <release>8</release> from your maven-compiler-plugin configuration:

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<verbose>true</verbose>
</configuration>
</plugin>
小开

This configuration worked for me, for java 11. (IntelliJ version 2019.1) java.version is 11, declared in the properties part of the pom.xml. Maven version should be 3.6 or higher.

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<fork>false</fork>
<source>${java.version}</source>
<target>${java.version}</target>
<encoding>UTF-8</encoding>
<compilerArgs>
<arg>-parameters</arg>
</compilerArgs>
<release>${java.version}</release>
<forceJavacCompilerUse>true</forceJavacCompilerUse>
</configuration>
<executions>
<!-- Replacing default-compile as it is treated specially by maven -->
<execution>
<id>default-compile</id>
<phase>none</phase>
</execution>
<!-- Replacing default-testCompile as it is treated specially by maven -->
<execution>
<id>default-testCompile</id>
<phase>none</phase>
</execution>
<execution>
<id>java-compile</id>
<phase>compile</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>java-test-compile</id>
<phase>test-compile</phase>
<goals>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
</plugin>
小开

This has to do with the version of JDK running on your system. As per the documentation for maven-compiler-plugin, the release flag is supported since 1.9, and thus has to be commented/removed from the POM if you are using prior (1.8 and below) versions of JDK.

Check Maven documentation for release tag for maven-compiler-plugin here

小开

open terminal to check that Maven using correct version of Java

run: mvn -v

If you will see an old Java version, that might be the problem.

Being on Linux, I suggest removing Maven, e.g. using Fedora package manager dnf remove maven or check your PATH for maven.

Download one from here: https://maven.apache.org/download.cgi

Extract downloaded to your home path, e.g. ~/maven.

Add/Edit ~/maven/bin to your PATH

Reapply .bash_profile (or re-login)

Run mvn -v

Now you should see a correct Java version in the output

小开

An alternative approach is to directly set the compiler flags inside your properties tag instead of using the <configuration> tag of the compiler plugin:

<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
<!--  Use the release flag only if you are using Java 9+  -->
<!--  <maven.compiler.release>8</maven.compiler.release>  -->
<!-- verbose is useful for debugging purposes -->
<maven.compiler.verbose>true</maven.compiler.verbose>
</properties>

As stated in the official page:

https://maven.apache.org/plugins/maven-compiler-plugin/examples/set-compiler-source-and-target.html

小开

I faced this problem too, check your JAVA_HOME environment variable. I was setting the value of release to 11 as I am using JAVA 11. My System JAVA_HOME was set for java 8, After adding the JAVA_HOME user environment variable to the java 11 path this got resolved.

小开

This is mostly because of the java version mismatch. Managing more than one java version for projects can be painful.

I am working simultaneously on projects asking for different versions of java and have been using jenv for switching the java versions.

More details here

小开 
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile (default-testCompile) on project selenium-for-beginners: Execution default-testCompile of goal org.apache.maven.plugins:maven-compiler-plugin:3.10.1:testCompile failed: multiple points -> [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/PluginExecutionException

When trying to do a Selenium maven beginner project if you are running into this trouble/issue. Please try to change the maven plugin in the pom.xml file. Use Plugin for "Compile Using the --release javac option (JDK 9+)". This should work.


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