另一个 Maven “不再支持源选项 6。使用 7 或更高版本。”

Question

I see lots of answers to this question but they don't work for me. I installed Visual Studio Code, latest version of Java and Maven on my PC and I was able to successfully build my application with Maven on the PC. I then went through the same steps on my Mac and I get this error.

Fresh versions of Macos, Visual Studio Code, Maven and Java. Like all the others have said, I added these lines to the properties section of my pom.xml file:

    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>

Still get the same error. Here is the relevant output from the mvn build:

alberts-mbp:com.versabuilt.rushmore.process albertyoungwerth$ mvn package
[INFO] Scanning for projects...
[INFO] 
[INFO] ---------< com.versabuilt.rushmore.process:VersaBuiltProcess >----------
[INFO] Building VersaBuilt Process 0.2.18
[INFO] -------------------------------[ bundle ]-------------------------------
[INFO] 
[INFO] --- maven-resources-plugin:3.0.2:resources (default-resources) @ VersaBuiltProcess ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 5 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.6.0:compile (default-compile) @ VersaBuiltProcess ---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding UTF-8, i.e. build is platform dependent!
[INFO] Compiling 10 source files to /Users/albertyoungwerth/rushmore/com.versabuilt.rushmore.process/target/classes
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] Source option 6 is no longer supported. Use 7 or later.
[ERROR] Target option 6 is no longer supported. Use 7 or later.
[INFO] 2 errors

I have also restarted Visual Studio Code to no avail.

Answer 1

The last build system I used was called make, so it's been a while since I debugged a build process. I don't remember make dumping 62Kb of debug output either...

Anywho, searching for the keyword "source" (clue being that was one of the tags I was supposed to add) got me to this in the maven debug output:

[DEBUG] (f) source = 1.6

Ahaaa, the source compiler version had not changed like I asked it to with the edit in my original question. I'll bet the maven folks changed the location of the xml tag. Sure enough: searching for 1.6 in the pom.xml file I find this:

    <build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.6.0</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>

I changed the source and target tag values to 1.8 and it worked. I also tried deleting the source and target tags in the build plugins scope and left in the maven.compiler.source/target values set to 1.8 and that also worked.

So moral of the story, be careful of extra source or target tags in your pom.xml file!

Answer 2

Actually, I too faced the above error message, after adding this to property file, Error got resolved. :)

property need to be added in pom.xml

 <properties>
        <maven.compiler.source>11</maven.compiler.source>
        <maven.compiler.target>11</maven.compiler.target>
    </properties>

Answer 3

I corrected this problem by matching the jdk between my IDE and the pom.xml file.

Answer 4

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <configuration>
        <source>1.7</source>
        <target>1.7</target>
    </configuration>
</plugin>

Answer 5

Sometimes changing from Kotlin to java or inverted.

You can also change or java version to a higher one.

At least that worked for me.

Answer 6

Changing maven compiler version in pom file solved my issue. <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target>

Answer 7

go to your project properties and go to sources. then in Source/binary format it will be JDK 5 or 6 etc. but click and make it the higher version. you are done.:)