java - maven升级源码版本

Question

我有个问题。我在我的 Ubuntu 机器上安装了 Java 15.0.2:

java version "15.0.2" 2021-01-19
Java(TM) SE Runtime Environment (build 15.0.2+7-27)
Java HotSpot(TM) 64-Bit Server VM (build 15.0.2+7-27, mixed mode, sharing)

我还安装了 Maven:

Apache Maven 3.6.3
Maven home: /usr/share/maven
Java version: 15.0.2, vendor: Oracle Corporation, runtime: /usr/lib/jvm/java-15-oracle
Default locale: en, platform encoding: UTF-8
OS name: "linux", version: "5.4.0-66-generic", arch: "amd64", family: "unix"

现在，当我尝试构建包时，出现以下错误:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile (default-compile) on project Simulator: Compilation failure: Compilation failure:
[ERROR] /binance/Simulator/src/main/java/com/company/drivers/SimulatorDriver.java:[241,16] switch expressions are not supported in -source 7
[ERROR]   (use -source 14 or higher to enable switch expressions)
[ERROR] /binance/Simulator/src/main/java/com/company/drivers/SimulatorDriver.java:[242,22] switch rules are not supported in -source 7
[ERROR]   (use -source 14 or higher to enable switch rules)
[ERROR] /binance/Simulator/src/main/java/com/company/models/Candlestick.java:[127,43] method references are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable method references)
[ERROR] /binance/Simulator/src/main/java/com/company/models/Candlestick.java:[175,155] lambda expressions are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable lambda expressions)
[ERROR] /binance/Simulator/src/main/java/com/company/models/Slope.java:[63,38] method references are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable method references)
[ERROR] /binance/Simulator/src/main/java/com/company/models/Slope.java:[94,155] lambda expressions are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable lambda expressions)
[ERROR] /binance/Simulator/src/main/java/com/company/models/Pattern.java:[76,35] method references are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable method references)
[ERROR] /binance/Simulator/src/main/java/com/company/models/Pattern.java:[102,155] lambda expressions are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable lambda expressions)
[ERROR] /binance/Simulator/src/main/java/com/company/deserializers/AgentStrategyConfigDeserializer.java:[21,163] lambda expressions are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable lambda expressions)
[ERROR] /binance/Simulator/src/main/java/com/company/deserializers/AgentStrategyPackageDeserializer.java:[27,163] lambda expressions are not supported in -source 7
[ERROR]   (use -source 8 or higher to enable lambda expressions)

看起来 Maven 中的 Java 版本是 7，但我需要在版本 15 上运行。我已经安装了 java，但是如何为我的 maven 升级/设置 java？

Answer 1

尝试将以下内容添加到您的 POM

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.8.1</version>
    <configuration>
        <release>15</release>
    </configuration>
</plugin>