Maven:No compiler is provided in this environment

问题

在执行maven install的时候，提示如下错误:

No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?

解决

解决办法是:
1.多project clear几次项目,project clear之后不要运行maven clear;
2.在maven的conf/settings.xml中,添加如下代码即可(依照版本来,我这里是jdk 1.8就写1.8):

<profile>
<id>jdk-1.8</id>
<activation>
<activeByDefault>true</activeByDefault>
<jdk>1.8</jdk>
</activation>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
</properties>
</profile>