How to solve the problem of maven.compiler.source and maven.compiler.target in maven
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The pit of maven maven.compiler.source and maven.compiler.target
Recently, the product group was advised to upgrade jdk 1.7 to 1.8. Last night, the developer reported a problem, saying that after maven.compiler.source and maven.compiler.target were changed to 1.8, the compiled code was still 1.7, as follows:
You can also view the java compiled version number of the class file through javap-v ServiceImpl.class.
In the afternoon, I took the time to take a look, and sure enough, the first suspicion was that the two parameters maven.compiler.source and maven.compiler.target were unreliable.
Take a look at the JDK configured by IDE
As follows:
After automatic build, it is indeed jdk 1.7
As follows:
Replace it with J2SE-1.8
Change it to 1.6
Looking up the official maven documentation, you can see that maven.compiler.source and maven.compiler.target are only recommendations, not mandatory.
If you want to force the jdk version
You can specify the executable attribute to guarantee it, as follows:
[...] [...] Org.apache.maven.plugins maven-compiler-plugin 3.7.0 true true 1.3 [...] [...]
Problem solved.
Maven compiler error java:-source,pom setting maven.compiler.source principle
The plug-in Maven compiler Plugin we compiled is used to compile code. When we were just learning java, we used the javac command to compile .java files into .class files.
And set up
${java.version} ${java.version}
Is to specify javac-source and target options, the official website
Sometimes, the diamond operator is not supported in maven compilation error java:-source 1.5 because no compiled version is specified. Just specify the version.
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