java - 无法运行Grails，解决类错误

Question

我是grails的新手，需要帮助弄清为什么由于以下错误而无法运行grails:

grails> run-app
| Running application...
startup failed:
C:\DIR\grails-inventory\grails-app\controllers\harbor\AssetController.groovy: 3: unable to resolve class     org.apache.jasper.compiler.Node.ParamsAction
 @ line 3, column 1.
import org.apache.jasper.compiler.Node.ParamsAction;
^
1 error
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileGroovy'.
> Compilation failed; see the compiler error output for details.

如果我要注释掉AssetController中的特定行，则将执行grails，但是整个应用程序将出现NullPointer错误

Answer 1

尝试将其添加到Gradle依赖项中:

dependencies { 
    // specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g. 
    // runtime 'mysql:mysql-connector-java:5.1.22'
    compile 'tomcat:jasper-compiler:5.5.9'
}

您可以在Grails 2.x中找到jasper: https://grails.org/plugin/jasper和Grails 3.x的插件在这里: https://bintray.com/grails/plugins，但是正如我所见，Grails 3没有Jasper插件，因此请尝试如上所述直接添加依赖项。