所以我想尝试http客户端

package com.company;

import jdk.incubator.http.HttpClient;

public class Main {

public static void main(String[] args) {
    HttpClient client =  HttpClient.newHttpClient();

  }
}

我的模块信息看起来像这样

module com.company {
    requires jdk.incubator.httpclient;
}

但我明白了 java.lang.NoClassDefFoundError: jdk/incubator/http/HttpClient

我真的不明白为什么.我的java版本是"build 9-ea + 169",我使用最新版本的IntelliJ idea(2017.1.3).我查看了这个答案,看起来我只需要将需求添加到文件中,但由于某种原因它不起作用.

题

如何jdk.incubator.httpclient在运行时使模块中的类可见？

我在用什么

Java 9 + Maven + HttpClient jdk.incubator.http.HttpClient

问题

=>使用时Maven构建失败jdk.incubator.HttpClient.修正了与这个问题由于@nullpointer

=>运行时堆栈跟踪:

java.lang.NoClassDefFoundError: jdk/incubator/http/HttpClient
at com.foo.Bar.Bar.<clinit>(Bar.java:56) ~[?:?]
at java.lang.Class.forName0(java.base@9-Ubuntu/Native Method) ~[?:?]
at java.lang.Class.forName(java.base@9-Ubuntu/Class.java:374) ~[?:?]
Caused by: java.lang.ClassNotFoundException: jdk.incubator.http.HttpClient
at java.net.URLClassLoader.findClass(java.base@9-Ubuntu/URLClassLoader.java:388) ~[?:?]
at java.lang.ClassLoader.loadClass(java.base@9-Ubuntu/ClassLoader.java:486) ~[?:?]
at java.lang.ClassLoader.loadClass(java.base@9-Ubuntu/ClassLoader.java:419) ~[?:?]
at com.foo.Bar.Bar.<clinit>(Bar.java:56) ~[?:?]
at java.lang.Class.forName0(java.base@9-Ubuntu/Native Method) ~[?:?]
at java.lang.Class.forName(java.base@9-Ubuntu/Class.java:374) ~[?:?]

构建Pom部分

<build>
    <finalName>${project.artifactId}</finalName>
    <sourceDirectory>${project.basedir}/src</sourceDirectory>

    <resources>
        <resource>
            <targetPath>.</targetPath>
            <filtering>true</filtering>
            <directory>${project.basedir}/resources</directory>

            <includes>
                <include>plugin.yml</include>
            </includes>
        </resource>
    </resources>

    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-clean-plugin</artifactId>
            <version>3.0.0</version>
        </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.7.0</version> …