我在我的项目中改变了使用的java版本,现在我使用lambdas表达式。现在我使用lambdas表达式。
如果我用IDE(IntelliJ)编译,运行良好。但是当我用maven:assembly编译时,它失败了。
这是输出结果。
[ERROR] ...../commands/parser/CommandParser.java:[141,73] lambda expressions are not supported in -source 1.5
[ERROR] (use -source 8 or higher to enable lambda expressions)
和我的pom.xml。
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.lefrantguillaume</groupId>
<artifactId>ServerTinyTank</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>com.esotericsoftware</groupId>
<artifactId>kryonet</artifactId>
<version>2.22.0-RC1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>args4j</groupId>
<artifactId>args4j</artifactId>
<version>2.32</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.lefrantguillaume.Main</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
据我所知,你从未设置过 ${java.version}
. 更重要的是,你没有在编译器目标中设置这个变量。
这里是它应该是什么样子的。
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.lefrantguillaume</groupId>
<artifactId>ServerTinyTank</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<url>http://maven.apache.org</url>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>com.esotericsoftware</groupId>
<artifactId>kryonet</artifactId>
<version>2.22.0-RC1</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-server</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-client</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.sun.jersey</groupId>
<artifactId>jersey-json</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>args4j</groupId>
<artifactId>args4j</artifactId>
<version>2.32</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>com.lefrantguillaume.Main</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
这应该是个好办法
<source>1.8</source>
<target>1.8</target>
你在哪里定义你的属性?
也可以使用下面pom.xml中的代码,并在Maven构建运行配置中设置目标为 "clean package assembly:single"。
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<archive>
<manifest>
<mainClass>com.lefrantguillaume.Main</mainClass>
</manifest>
</archive>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>