maven构建jfinal，启动报错“错误: 找不到或无法加载主类 com.jfinal.core.JFinal”求解

Question

开发环境，eclipse4.5 JDK8 Maven3.9 Jfinal2.2

环境搭建开始一切顺利，相关的包已引入，web.xml已建立，就是在Debug的时候，提示错误：

错误: 找不到或无法加载主类 com.jfinal.core.JFinal

Debug的Arguments参数里已经添加了“src/main/webapp 8080 /5”参数，依然无法启动，求大家帮忙看看。

Effective POM:

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.robbinz.erp</groupId>
  <artifactId>store_app</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <properties>
    <maven.compiler.compilerVersion>1.8</maven.compiler.compilerVersion>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  <dependencies>
    <dependency>
      <groupId>com.jfinal</groupId>
      <artifactId>jfinal</artifactId>
      <version>2.2</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.oracle</groupId>
      <artifactId>ojdbc6</artifactId>
      <version>11.2.0.2.0</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
  <repositories>
    <repository>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
      <id>nexus</id>
      <name>local private nexus</name>
      <url>http://maven.oschina.net/content/groups/public/</url>
    </repository>
    <repository>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
      <id>central</id>
      <name>Central Repository</name>
      <url>https://repo.maven.apache.org/maven2</url>
    </repository>
  </repositories>
  <pluginRepositories>
    <pluginRepository>
      <releases>
        <enabled>true</enabled>
      </releases>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
      <id>nexus</id>
      <name>local private nexus</name>
      <url>http://maven.oschina.net/content/groups/public/</url>
    </pluginRepository>
    <pluginRepository>
      <releases>
        <updatePolicy>never</updatePolicy>
      </releases>
      <snapshots>
        <enabled>false</enabled>
      </snapshots>
      <id>central</id>
      <name>Central Repository</name>
      <url>https://repo.maven.apache.org/maven2</url>
    </pluginRepository>
  </pluginRepositories>
  <build>
    <sourceDirectory>D:eclipseworkspacesstore_appsrcmainjava</sourceDirectory>
    <scriptSourceDirectory>D:eclipseworkspacesstore_appsrcmainscripts</scriptSourceDirectory>
    <testSourceDirectory>D:eclipseworkspacesstore_appsrctestjava</testSourceDirectory>
    <outputDirectory>D:eclipseworkspacesstore_apptargetclasses</outputDirectory>
    <testOutputDirectory>D:eclipseworkspacesstore_apptargettest-classes</testOutputDirectory>
    <resources>
      <resource>
        <directory>D:eclipseworkspacesstore_appsrcmainresources</directory>
      </resource>
    </resources>
    <testResources>
      <testResource>
        <directory>D:eclipseworkspacesstore_appsrctestresources</directory>
      </testResource>
    </testResources>
    <directory>D:eclipseworkspacesstore_apptarget</directory>
    <finalName>store_app-0.0.1-SNAPSHOT</finalName>
    <pluginManagement>
      <plugins>
        <plugin>
          <artifactId>maven-antrun-plugin</artifactId>
          <version>1.3</version>
        </plugin>
        <plugin>
          <artifactId>maven-assembly-plugin</artifactId>
          <version>2.2-beta-5</version>
        </plugin>
        <plugin>
          <artifactId>maven-dependency-plugin</artifactId>
          <version>2.8</version>
        </plugin>
        <plugin>
          <artifactId>maven-release-plugin</artifactId>
          <version>2.3.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
    <plugins>
      <plugin>
        <artifactId>maven-clean-plugin</artifactId>
        <version>2.5</version>
        <executions>
          <execution>
            <id>default-clean</id>
            <phase>clean</phase>
            <goals>
              <goal>clean</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-resources-plugin</artifactId>
        <version>2.6</version>
        <executions>
          <execution>
            <id>default-testResources</id>
            <phase>process-test-resources</phase>
            <goals>
              <goal>testResources</goal>
            </goals>
          </execution>
          <execution>
            <id>default-resources</id>
            <phase>process-resources</phase>
            <goals>
              <goal>resources</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.2</version>
        <executions>
          <execution>
            <id>default-war</id>
            <phase>package</phase>
            <goals>
              <goal>war</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <executions>
          <execution>
            <id>default-compile</id>
            <phase>compile</phase>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
          <execution>
            <id>default-testCompile</id>
            <phase>test-compile</phase>
            <goals>
              <goal>testCompile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.12.4</version>
        <executions>
          <execution>
            <id>default-test</id>
            <phase>test</phase>
            <goals>
              <goal>test</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-install-plugin</artifactId>
        <version>2.4</version>
        <executions>
          <execution>
            <id>default-install</id>
            <phase>install</phase>
            <goals>
              <goal>install</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-deploy-plugin</artifactId>
        <version>2.7</version>
        <executions>
          <execution>
            <id>default-deploy</id>
            <phase>deploy</phase>
            <goals>
              <goal>deploy</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-site-plugin</artifactId>
        <version>3.3</version>
        <executions>
          <execution>
            <id>default-site</id>
            <phase>site</phase>
            <goals>
              <goal>site</goal>
            </goals>
            <configuration>
              <outputDirectory>D:eclipseworkspacesstore_apptargetsite</outputDirectory>
              <reportPlugins>
                <reportPlugin>
                  <groupId>org.apache.maven.plugins</groupId>
                  <artifactId>maven-project-info-reports-plugin</artifactId>
                </reportPlugin>
              </reportPlugins>
            </configuration>
          </execution>
          <execution>
            <id>default-deploy</id>
            <phase>site-deploy</phase>
            <goals>
              <goal>deploy</goal>
            </goals>
            <configuration>
              <outputDirectory>D:eclipseworkspacesstore_apptargetsite</outputDirectory>
              <reportPlugins>
                <reportPlugin>
                  <groupId>org.apache.maven.plugins</groupId>
                  <artifactId>maven-project-info-reports-plugin</artifactId>
                </reportPlugin>
              </reportPlugins>
            </configuration>
          </execution>
        </executions>
        <configuration>
          <outputDirectory>D:eclipseworkspacesstore_apptargetsite</outputDirectory>
          <reportPlugins>
            <reportPlugin>
              <groupId>org.apache.maven.plugins</groupId>
              <artifactId>maven-project-info-reports-plugin</artifactId>
            </reportPlugin>
          </reportPlugins>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <reporting>
    <outputDirectory>D:eclipseworkspacesstore_apptargetsite</outputDirectory>
  </reporting>
</project>

pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.robbinz.erp</groupId>
  <artifactId>store_app</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  
  <dependencies>
  	<dependency>
  		<groupId>com.jfinal</groupId>
  		<artifactId>jfinal</artifactId>
  		<version>2.2</version>
  	</dependency>
  	<dependency>
  		<groupId>com.oracle</groupId>
  		<artifactId>ojdbc6</artifactId>
  		<version>11.2.0.2.0</version>
  	</dependency>
  </dependencies>
</project>

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
	<display-name>store-app</display-name>
	<welcome-file-list>
		<welcome-file>index.html</welcome-file>
	</welcome-file-list>
	<filter>
		<filter-name>jfinal</filter-name>
		<filter-class>com.jfinal.core.JFinalFilter</filter-class>
		<init-param>
			<param-name>configClass</param-name>
			<param-value>com.robbinz.store_app.core.SysConfig</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>jfinal</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

目录结构：

Answer 1

我也遇到这个问题，什么方法都试了解决不了

Answer 2

问题解决了，我啥也没改，就是把原来的项目删除了，然后重新建立了一个新的maven项目，就好了。

貌似是遇到灵异事件了……

特别感谢，波总显灵

Answer 3

   将 modules settings 中的 paths 下面的 output path 和 test outputpath 都改成 WEB-INF/classes 之下，另外，要特别注意在改之后 IDEA 自动给改回来的情况，多试几次就找准门道了。

Answer 4

先把项目编译一遍再试试，再就是你可以参考一下JFinalUIB的maven版本

Answer 5

jfinal官方明确说过的，main方法可有可无，我以前都是用com.jfinal.core.JFinal做入口，然后加参数启动的。只是这次用了maven就不行了，所以你说必须有main方法是不对的。

Answer 6

回复
官方的是web项目，你用maven了，结构不一样了。我一直这么做的，你可以继续探索一下。

Answer 7

即便是把main方法写在config类里，作为debug入口，依然报这个错误

Answer 8

main方法在哪里？启动必须自己写在main里面，然后start才可以。我是放在config类里面了。

public static void main(String[] args){
		JFinal.start("src/main/webapp", 80, "/", 5);
	}

debug启动的是这个入口。