java GWT - 编译错误：没有可用于类型的源代码
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GWT - Compilation error: No source code is available for type
提问by Fran?ois Esthète
I am building GWT application by Maven.
我正在通过 Maven 构建 GWT 应用程序。
When compiling get the following message:
编译时得到以下消息：
Validating newly compiled units
At first there is this warning:
起初有这个警告：
[WARNING] Don't declare gwt-dev as a project dependency. This may introduce complex dependency conflicts
Then there is this error:
然后出现这个错误：
[ERROR] Line 19: No source code is available for type org.apache.commons.lang.StringUtils did you forget to inherit a required module?
Despite this build does not fall and Dev mode works properly. How can I get rid of these error messages?
尽管此构建不会下降并且开发模式正常工作。我怎样才能摆脱这些错误消息？
回答by Kapelchik
Perhaps a reason is in your module file. You should to identify packages that is to be compiled. This is configured in .gwt.xmlmodule.
也许一个原因在您的模块文件中。您应该确定要编译的包。这是在.gwt.xml模块中配置的。
<source path="packagename">
And GWT compiler will compile packages gwtxmlmodulepath.packagename.
GWT 编译器将编译包gwtxmlmodulepath.packagename。
回答by David Levesque
The error means that some of the client code (to be compiled as javascript) contains a reference to the StringUtils class from Apache Commons. This is not allowed because this library contains code that is not GWT-client compatible.
该错误意味着某些客户端代码（将被编译为 javascript）包含对来自 Apache Commons 的 StringUtils 类的引用。这是不允许的，因为此库包含与 GWT 客户端不兼容的代码。
