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java - Maven不使用本地JRE/JDK

转载 作者:行者123 更新时间:2023-11-30 01:52:17 25 4
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当我尝试在 Eclipse 中编译(运行 maven install)时,出现不兼容的错误。似乎由于某种原因,maven 使用旧的 jre/jdk 并且不使用在路径环境变量。即使当我运行 mvn -v 时,它输出 maven 使用正确的版本(在我的本地计算机上)

[ERROR] COMPILATION ERROR : 
[INFO] -------------------------------------------------------------
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/databasePackage/implementations/DBConnection.java:[132,21] try-with-resources is not supported in -source 1.5
(use -source 7 or higher to enable try-with-resources)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/databasePackage/implementations/DBConnection.java:[223,50] diamond operator is not supported in -source 1.5
(use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/DBConnection.java:[64,38] diamond operator is not supported in -source 1.5
(use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/DBConnection.java:[80,21] try-with-resources is not supported in -source 1.5
(use -source 7 or higher to enable try-with-resources)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/databasePackage/implementations/ObjectComparators.java:[21,48] diamond operator is not supported in -source 1.5
(use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/ObjectComparators.java:[21,48] diamond operator is not supported in -source 1.5
(use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/DatabaseTable.java:[420,51] diamond operator is not supported in -source 1.5
(use -source 7 or higher to enable diamond operator)
[INFO] 7 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 4.142 s
[INFO] Finished at: 2019-04-14T09:44:36+03:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project PetClinic: Compilation failure: Compilation failure:
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/databasePackage/implementations/DBConnection.java:[132,21] try-with-resources is not supported in -source 1.5
[ERROR] (use -source 7 or higher to enable try-with-resources)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/databasePackage/implementations/DBConnection.java:[223,50] diamond operator is not supported in -source 1.5
[ERROR] (use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/DBConnection.java:[64,38] diamond operator is not supported in -source 1.5
[ERROR] (use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/DBConnection.java:[80,21] try-with-resources is not supported in -source 1.5
[ERROR] (use -source 7 or higher to enable try-with-resources)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/databasePackage/implementations/ObjectComparators.java:[21,48] diamond operator is not supported in -source 1.5
[ERROR] (use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/ObjectComparators.java:[21,48] diamond operator is not supported in -source 1.5
[ERROR] (use -source 7 or higher to enable diamond operator)
[ERROR] /C:/Users/Barracuda/Desktop/Projects/Eclipse Projects/PetClinicWeb/src/main/java/com/model/adv/DatabaseTable.java:[420,51] diamond operator is not supported in -source 1.5
[ERROR] (use -source 7 or higher to enable diamond operator)
[ERROR] -> [Help 1]
[ERROR]

我应该如何解决这个问题?我可以在不每次都在 POM.xml 中指定要使用哪个版本的情况下做到这一点,而是告诉 maven 使用 Path env。变种?这是 eclipse 中指定的内容:

enter image description here

这是 JAVA_HOME 环境。变种。

enter image description here

这是 MAVEN_HOMEenv。变种 enter image description here

这里 — mvn -v 和 java -version 的输出 enter image description here

enter image description here

这是 PATH 环境。变量:。 enter image description here

这是我的 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.arslan</groupId>
<artifactId>PetClinic</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Pet Clinic Web Application</name>

<dependencies>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>

</dependencies>
</project>

即使从命令行运行 mvn install 也没有帮助。

最佳答案

您需要在 POM 中设置以下内容:

<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>

原因如下:即使使用正确配置的 JDK 1.8,您也可以使用不同的兼容性级别(1.7、1.6,...)进行构建。如果不给出版本,Maven 将使用非常旧的版本进行构建。

关于java - Maven不使用本地JRE/JDK,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55672785/

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