使用jigsaw模块在jdk9中运行spring boot

Question

这个应用程序有什么问题。我认为类路径jar和模块jar的混合是有效的。对于所有没有显式模块的jar-info变成自动模块？当我删除我的模块-info.java时，它就可以工作了。因为在这种情况下，我想使用类路径。

Java(TM)SE运行时环境（构建9+176)

module test {
    requires spring.boot.autoconfigure;
    requires spring.boot;
}

package com.foo.test;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class App {

    public static void main(String[] args) {
        SpringApplication.run(App.class, args);
    }
}

<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.foo.test</groupId>
    <artifactId>test</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.0.M2</version>
    </parent>

    <name>test</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.9</maven.compiler.source>
        <maven.compiler.target>1.9</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
</project>

线程“main”java.lang.IllegalArgumentException：无法实例化接口org.springframework.context.applicationContextInitializer:org.springframework.boot.context.context.configurationWarningsApplicationContextInitializer:2.0.0.m2/org.springframework.boot.springapplication.createspringFactoriesInstances(SpringApplication.java:439)在FactoriesInstances(SpringApplication.java:409)在spring.boot@2.0.0.m2/org.springframework.boot.springapplication.java:266)在spring.boot@2.0.0.m2/org.springframework.boot.springapplication.java:266)在spring.boot@2.0.0.m2/org.springframework.boot.springapplication.java:247)在在test/com.foo.test.app.main（app.java：10）处由:java.lang.noClassDeffounderror：java/sql/sqlexception at [e-mail]2/org.springframework.beans.beanutils.instantiateClass(beanutils.java:145)at.java:582)在java.base/jdk.internal.loader.classloaders$appClassLoader.loadClass(classLoaders.java:185)在java.base/java.lang.classLoader.loadClass(classLoader.java:496)...还有9个

Answer 1

我假设Spring.boot是一个自动模块。自动模块不声明依赖关系，因此必须使用--add-modules来确保解析所需的任何显式模块。如果Spring.boot是一个显式模块，那么我假设它需要java.sql，您就不会遇到这个问题。