“包 javax.xml.soap 在模块 java.xml.ws 中声明，该模块不在模块图中”
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"package javax.xml.soap is declared in module java.xml.ws, which is not in the module graph"
提问by Thue
So I took the SOAP example at Working Soap client example, put it into a file SOAPClientSAAJ.java, and tried compiling it (Openjdk 9 on Debian):
因此，我在Working Soap client example 中采用了 SOAP 示例，将其放入文件中SOAPClientSAAJ.java，并尝试编译它（Debian 上的 Openjdk 9）：
t@h ~/javatest> javac SOAPClientSAAJ.java
SOAPClientSAAJ.java:1: error: package javax.xml.soap is not visible
import javax.xml.soap.*;
^
(package javax.xml.soap is declared in module java.xml.ws, which is not in the module graph)
1 error
After Googling some, I found out that compiling and running as
谷歌搜索后，我发现编译和运行为
t@h ~/javatest> javac --add-modules java.xml.ws SOAPClientSAAJ.java
t@h ~/javatest> java --add-modules java.xml.ws SOAPClientSAAJ
works. See also this video for general background: https://www.youtube.com/watch?v=y8bpKYDrF5I&t=20m17s
作品。另请参阅此视频了解一般背景：https: //www.youtube.com/watch?v=y8bpKYDrF5I&t=20m17s
Now, questions:
现在，问题：
- Shouldn't the compiler automatically add the module java.xml.ws ? (since it obviously knows it is needed) Is this a bug in javax.xml.soap ?
- Why is the --add-modules option not documented in my man pages? (openjdk 9 in Debian)
- What should I write in the .java file to automatically add the java.xml.ws module?
- 编译器不应该自动添加模块 java.xml.ws 吗？（因为它显然知道它是需要的）这是 javax.xml.soap 中的错误吗？
- 为什么我的手册页中没有记录 --add-modules 选项？（Debian 中的 openjdk 9）
- 我应该在.java文件中写什么来自动添加java.xml.ws模块？
回答by Evan Knowles
This is a result of the new Java 9 modules. The javax.xml.soappackage is actually a Java EE package, and so now isn't visible. The current workaround is to either use the --add-modules, as you've done, or to modularize your code.
这是新的 Java 9 模块的结果。该javax.xml.soap包实际上是一个 Java EE 包，因此现在不可见。当前的解决方法是使用--add-modules，就像您所做的那样，或者模块化您的代码。
Modularizing your code requires restructuring it into modules, and including a module-info.javafile that specifies the modules you're using. In your case, specifying java.se.eewould give access to all the EE modules.
模块化您的代码需要将其重组为模块，并包含一个module-info.java指定您正在使用的模块的文件。在您的情况下，指定java.se.ee将提供对所有 EE 模块的访问权限。
