maven的setting.xm需要配置jdk
全局
<profiles><id>jdk-1.8</id> <activation> <activeByDefault>true</activeByDefault> <jdk>1.8</jdk> </activation> <properties> <piler.source>1.8</piler.source> <piler.target>1.8</piler.target> <pilerVersion>1.8</pilerVersion> </properties> </profiles>
局部
<build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build>
重新编译项目,然后重新打包