【maven】通过Archetype创建的maven project 默认jre-1.5

本文解决了在使用Maven创建Dynamicweb项目时遇到的Java版本配置问题。通过在pom.xml中设置maven-compiler-plugin插件的source和target属性为1.7,确保了项目的编译版本为Java 1.7。

问题描述:

    在maven创建Dynamic web项目时,配置Project Facets时,勾选了Dynamic Web Module后并设置Version为 3.0以上的时候就会要求jre是1.6以上的版本的。这时候我选择了Java的Version是1.6。这样以后没有问题了,但是当我用Maven--->update project...的时候jre又变回了原来版本1.5的jre。


问题分析:

    为什么  maven--->update project...就还原到原来的jre,且为什么是1.5的版本呢?这就要看下update到底做了什么事? 做了什么可以查看以下链接:java - What does Update Maven Project do in eclipse

问题解决:

    这个根本的问题是:指定maven的编译级别。

    如何设定maven的编译级别呢?只要在pom.xml文件加入如下配置:

       pom.xml

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


http://tianya23.blog.51cto.com/1081650/289363

转载于:https://my.oschina.net/jast90/blog/287537

"mvn org.apache.maven.plugins:maven-archetype-plugin:3.1.2:generate -DarchetypeArtifactId="maven-archetype-webapp" -DarchetypeGroupId="org.apache.maven.archetypes" -DarchetypeVersion="1.4" -DgroupId="com.example" -DartifactId="demo"" WARNING: A restricted method in java.lang.System has been called WARNING: java.lang.System::load has been called by org.fusesource.jansi.internal.JansiLoader in an unnamed module (file:/C:/Program%20Files/Java/apache-maven-3.9.9-bin/apache-maven-3.9.9/lib/jansi-2.4.1.jar) WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module WARNING: Restricted methods will be blocked in a future release unless native access is enabled WARNING: A terminally deprecated method in sun.misc.Unsafe has been called WARNING: sun.misc.Unsafe::objectFieldOffset has been called by com.google.common.util.concurrent.AbstractFuture$UnsafeAtomicHelper (file:/C:/Program%20Files/Java/apache-maven-3.9.9-bin/apache-maven-3.9.9/lib/guava-33.2.1-jre.jar) WARNING: Please consider reporting this to the maintainers of class com.google.common.util.concurrent.AbstractFuture$UnsafeAtomicHelper WARNING: sun.misc.Unsafe::objectFieldOffset will be removed in a future release [INFO] Scanning for projects... [INFO] [INFO] ------------------< org.apache.maven:standalone-pom >------------------- [INFO] Building Maven Stub Project (No POM) 1 [INFO] --------------------------------[ pom ]--------------------------------- [INFO] [INFO] >>> archetype:3.1.2:generate (default-cli) > generate-sources @ standalone-pom >>> [INFO] [INFO] <<< archetype:3.1.2:generate (default-cli) < generate-sources @ standalone-pom <<< [INFO] [INFO] [INFO] --- archetype:3.1.2:generate (default-cli) @ standalone-pom --- [INFO] Generating project in Interactive mode
05-12
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