maven构建jfinal，启动报错“错误: 找不到或无法加载主类 com.jf?报错
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:\eclipse\workspaces\store_app\src\main\java</sourceDirectory>
<scriptSourceDirectory>D:\eclipse\workspaces\store_app\src\main\scripts</scriptSourceDirectory>
<testSourceDirectory>D:\eclipse\workspaces\store_app\src\test\java</testSourceDirectory>
<outputDirectory>D:\eclipse\workspaces\store_app\target\classes</outputDirectory>
<testOutputDirectory>D:\eclipse\workspaces\store_app\target\test-classes</testOutputDirectory>
<resources>
<resource>
<directory>D:\eclipse\workspaces\store_app\src\main\resources</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>D:\eclipse\workspaces\store_app\src\test\resources</directory>
</testResource>
</testResources>
<directory>D:\eclipse\workspaces\store_app\target</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:\eclipse\workspaces\store_app\target\site</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:\eclipse\workspaces\store_app\target\site</outputDirectory>
<reportPlugins>
<reportPlugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
</reportPlugin>
</reportPlugins>
</configuration>
</execution>
</executions>
<configuration>
<outputDirectory>D:\eclipse\workspaces\store_app\target\site</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:\eclipse\workspaces\store_app\target\site</outputDirectory>
</reporting>
</project>
<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>
<?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>
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https://developer.aliyun.com/profile/5yerqm5bn5yqg?spm=a2c6h.12873639.0.0.6eae304abcjaIBmain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。
publicstaticvoidmain(String[]args){JFinal.start("src/main/webapp",80,"/",5);}debug启动的是这个入口。
即便是把main方法写在config类里，作为debug入口，依然报这个错误回复 @冰小块: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。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。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
将modulessettings中的paths下面的outputpath和testoutputpath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。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
我也遇到这个问题，什么方法都试了解决不了2020-06-10 14:12:40赞同 展开评论 打赏
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