maven 设置 JDK版本

1.方法一：settings.xml

<profiles>   
     <profile>     
          <id>jdk-1.6</id>     
          <activation>     
              <activeByDefault>true</activeByDefault>     
              <jdk>1.6</jdk>     
          </activation>     
          <properties>     
              <maven.compiler.source>1.6</maven.compiler.source>     
              <maven.compiler.target>1.6</maven.compiler.target>     
              <maven.compiler.compilerVersion>1.6</maven.compiler.compilerVersion>     
          </properties>     
  	 </profile>    
 </profiles>

2.方法二：pom.xml

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.0.2</version>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
    </plugins>
</build>