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Modify the default JDK version of maven

In peacetime development, after adding a new java maven project, the default jdk version is java1.5.

The java1.5 version is lower, and there are many new features that report syntax errors after java1.5, such as @ Override compilation failed.

Now let's change the default jdk version of maven. There are two methods.

First: modify the conf/settings.xml under the maven directory, which applies globally.

This method works for all maven projects

Add the following to the profiles node:

Jdk-1.7 true 1.7 1.7 1.7

The JDK version here can be modified at will. It can be jdk1.8 or jdk1.9.

Save after modification and update the maven project:

At this point:

The jdk version has been changed to 1.7.

Second: modify the pom.xml file of the maven project

Add under the node:

Org.apache.maven.plugins maven-compiler-plugin1.71.7 ${file_encoding}

Example:

Then execute (mvn clean, mvn package) with the maven command line to get the jar package compiled with the specified jdk version.

Modify the JDK version of the maven project-compile compile and runtime build path

New java SE projects created with maven will use version 1.5 of JDK by default and will also be compiled to 1.5. If the project manually modifies the configuration of the following two places in eclipse, such as 1.7, it will become 1.5 again each time maven-update project.

Solution

Find the maven configuration file currently used by eclipse, open the configuration file, and add the following code to the profiles node, so right-click the project to execute maven-update project, and the above two running and compilation environments will become 1.7, no more worries.

Jdk-1.7 true 1.7 1.7 1.7

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