符号和包装找不到

Question

我正在尝试编译github存储库，https://github.com/grammarviz2/grammarviz2_src。但是，当我在CMD上运行该应用程序时，我会收到错误 -

    GrammarVizGUI.java:4: error: package net.seninp.grammarviz.controller does not exist
import net.seninp.grammarviz.controller.GrammarVizController;
                                       ^
GrammarVizGUI.java:5: error: package net.seninp.grammarviz.model does not exist
import net.seninp.grammarviz.model.GrammarVizModel;
                                  ^
GrammarVizGUI.java:6: error: package net.seninp.grammarviz.view does not exist
import net.seninp.grammarviz.view.GrammarVizView;
                                 ^
GrammarVizGUI.java:17: error: cannot find symbol
  private static GrammarVizModel model;
                 ^
  symbol:   class GrammarVizModel
  location: class GrammarVizGUI
GrammarVizGUI.java:20: error: cannot find symbol
  private static GrammarVizController controller;
                 ^
  symbol:   class GrammarVizController
  location: class GrammarVizGUI
GrammarVizGUI.java:23: error: cannot find symbol
  private static GrammarVizView view;
                 ^
  symbol:   class GrammarVizView
  location: class GrammarVizGUI
GrammarVizGUI.java:48: error: cannot find symbol
    model = new GrammarVizModel();
                ^
  symbol:   class GrammarVizModel
  location: class GrammarVizGUI
GrammarVizGUI.java:51: error: cannot find symbol
    controller = new GrammarVizController(model);
                     ^
  symbol:   class GrammarVizController
  location: class GrammarVizGUI
GrammarVizGUI.java:54: error: cannot find symbol
    view = new GrammarVizView(controller);
               ^
  symbol:   class GrammarVizView
  location: class GrammarVizGUI
9 errors

但是，在仔细检查时，我看到源中的许多软件包都存在于多个文件夹中。我在运行Java代码方面的经验几乎为零，因此我相信我必须犯一些愚蠢的错误。

Answer 1

缺少一些东西，让我们逐步进行：

缺少JAR-Plugin配置（汇编插件配置不足以在MANIFEST.MF

中提供Main-Class

将此插件配置添加到profile single

...
<profile>
    <id>single</id>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.5.4</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <archive>
                        <manifest>
                            <mainClass>net.seninp.grammarviz.GrammarVizGUI</mainClass>
                        </manifest>
                    </archive>
                    <!-- <filters> <filter>src/assembly/filter.properties</filter> </filters> 
                        <descriptors> <descriptor>src/assembly/distribution.xml</descriptor> </descriptors> -->
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id> <!-- this is used for inheritance merges -->
                        <phase>package</phase> <!-- bind to the packaging phase -->
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <archive>
                        <manifest>
                            <mainClass>net.seninp.grammarviz.GrammarVizGUI</mainClass>
                        </manifest>
                    </archive>
                    <!-- <filters> <filter>src/assembly/filter.properties</filter> </filters> 
                        <descriptors> <descriptor>src/assembly/distribution.xml</descriptor> </descriptors> -->
                </configuration>
            </plugin>
        </plugins>
    </build>
</profile>
...

然后，您需要在构建过程中使用此配置文件：

mvn -Psingle clean package
...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 18.949 s
[INFO] Finished at: 2019-03-21T21:30:25+01:00
[INFO] Final Memory: 28M/435M
[INFO] ------------------------------------------------------------------------

它在target目录中创建2个jar文件：

grammarviz2-0.0.1-SNAPSHOT.jar
grammarviz2-0.0.1-SNAPSHOT-jar-with-dependencies.jar

然后您需要运行该应用程序（来自target目录）：

java -jar grammarviz2-0.0.1-SNAPSHOT-jar-with-dependencies.jar

此jar包含一个MANIFEST.MF文件（/META-INF/MANIFEST.MF），该文件在pom.xml中配置了适当的条目，可以运行此jar作为应用程序，而无需提供主类。

"在我的机器上工作"：

java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
Linux Mint 18.3

Answer 2

您需要使用依赖项创建JAR文件。在Intellij中，就是这样：

文件 ->项目结构 ->伪像 ->单击' ' -> jar-> 来自具有依赖项的模块

然后显示一个小窗口，您必须在其中指定主要方法具有哪个类，然后单击"确定"，然后在项目结构中也可以。然后构建工件并导航到伪像文件夹中，在该文件夹中将在该文件夹中正常创建jar文件，在名为"伪像"的项目中。