使用 java 9 和 maven 编译 Spring Boot 应用程序失败 [英] compilation failure for spring boot application with java 9 and maven
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问题描述
我正在尝试构建使用 java-9 并将部署到 heroku 的 spring-boot 应用程序.作为构建工具，我使用 maven.
I am trying to build spring-boot application that uses java-9 and would be deployed to heroku. As a build tool I use maven.
我使用 initializr 生成了 spring boot 1.5 应用程序.我添加了 heroku 特定文件并将 toolchains.xml 添加到 .m2 存储库，用于 maven-compiler-plugin.
I generated spring boot 1.5 application using initializr. I added heroku specific files and added toolchains.xml to .m2 repository for maven-compiler-plugin.
我的pom.xml看起来像这样
<?xml version="1.0" encoding="UTF-8"?>
<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.lapots.breed.platform.cloud</groupId>
<artifactId>java-cloud-sample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>java-cloud-sample</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.9</java.version>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
<maven.compiler.release>9</maven.compiler.release>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>build-info</goal>
</goals>
<configuration>
<additionalProperties>
<encoding.source>${project.build.sourceEncoding}</encoding.source>
<encoding.reporting>${project.reporting.outputEncoding}</encoding.reporting>
<java.source>${maven.compiler.source}</java.source>
<java.target>${maven.compiler.target}</java.target>
</additionalProperties>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.0</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-toolchains-plugin</artifactId>
<version>1.1</version>
<configuration>
<toolchains>
<jdk>
<version>1.9</version>
<vendor>oracle</vendor>
</jdk>
</toolchains>
</configuration>
<executions>
<execution>
<goals>
<goal>toolchain</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
当我尝试使用 mvn clean package 编译项目时出现错误
When I try to compiler project using mvn clean package I get the error
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] javac: invalid flag: -Xmodule:null
Usage: javac <options> <source files>
use --help for a list of possible options
[INFO] 1 error
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.031 s
[INFO] Finished at: 2017-08-30T21:08:25+03:00
[INFO] Final Memory: 20M/309M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.6.0:testCompile (default-testCompile) on
project java-cloud-sample: Compilation failure
[ERROR] javac: invalid flag: -Xmodule:null
[ERROR] Usage: javac <options> <source files>
[ERROR] use --help for a list of possible options
[ERROR]
[ERROR]
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
module-info 看起来像这样
module com.lapots.breed.platform.cloud.javacloudsample {
requires spring.boot;
}
有什么问题?项目可用这里github 存储库
What is the problem? Project available here github repository
推荐答案
maven-compiler-plugin 3.6.0 基于 module-info.class 的第一个签名，它改变了几个次.它与当前的 Java 9 签名不兼容.使用最新版本的 JDK 9 时，您应该使用 3.6.2.
maven-compiler-plugin 3.6.0 is based on the first signature of module-info.class, which has changed a couple of times. It is not compatible with current Java 9 signature. You should use 3.6.2 when using most recent versions of JDK 9.
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