Maven打包时报错source 1.7 中不支持 lambda 表达式

报错信息如下：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project cachecloud-open-web: Compilation failure
[ERROR] /D:/Workspace/cachecloud-master/cachecloud-open-web/src/main/java/com/maxbill/core/desktop/DesktopApp.java:[90,54] -source 1.7 中不支持 lambda 表达式
[ERROR] (请使用 -source 8 或更高版本以启用 lambda 表达式)
[ERROR] -> [Help 1]

 解决办法：

配置pom.xml文件

<properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

<build>标签里面添加

<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>