Java应用程序部署Heroku

Question

上一次我做了一些关于web服务的研究，这些服务可以提供我的Java应用程序的构建和部署。我找到了Heroku，这似乎还好，但我遇到了一些问题。

首先，我的应用程序使用Spring (而不是Spring )，我有基于java的手动注释配置，根本没有web.xml。那是关于圈套的。现在，当涉及到提到的错误时，我将Heroku与我的GitHub存储库连接起来，然后部署它。一切都很好，最后只有一个问题，如下所示：

2018-03-23T07:12:02.679019+00:00 app[web.1]: Error: Main method not found in class th.config.MyWebAppInitializer, please define the main method as:
2018-03-23T07:12:02.679037+00:00 app[web.1]: public static void main(String[] args)
2018-03-23T07:12:02.679150+00:00 app[web.1]: or a JavaFX application class must extend javafx.application.Application

显然，Heroku环境需要一个包含main方法的类，这个方法在我的应用程序中是不存在的，至少在我自己的代码中是不存在的，但是很可能是在类中运行servlet的某个地方，比如ServletInitializer之类的。我试图使用标志<skipMain>true</skipMain>标志，以跳过这一点，但没有任何运气。

这里我包含了我的pom.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
....
<modelVersion>4.0.0</modelVersion>
<packaging>war</packaging>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.7.0</version>
            <configuration>
                <skipMain>true</skipMain>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
            <executions>
                <execution>
                    <id>default-war</id>
                    <phase>prepare-package</phase>
                    <configuration>
                        <skipMain>true</skipMain>
                        <failOnMissingWebXml>false</failOnMissingWebXml>
                    </configuration>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <version>3.2.0</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>3.0.2</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals><goal>copy-dependencies</goal></goals>
                    <configuration>
                        <artifactItems>
                            <artifactItem>
                                <groupId>com.github.jsimone</groupId>
                                <artifactId>webapp-runner</artifactId>
                                <version>7.0.22.3</version>
                                <destFileName>webapp-runner.jar</destFileName>
                            </artifactItem>
                        </artifactItems>
                    </configuration>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>


<groupId>webofficesuite</groupId>
<artifactId>webofficesuite</artifactId>
<version>1.0-SNAPSHOT</version>

<!-- SPRING COMPONENTS -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.3.13.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.3.13.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>4.3.13.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.3.13.RELEASE</version>
    </dependency>

    <!-- SPRING SECURITY -->
    <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-core -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-core</artifactId>
        <version>4.2.3.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-web -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-web</artifactId>
        <version>4.2.3.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-config -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>4.2.3.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-taglibs -->
    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-taglibs</artifactId>
        <version>4.2.3.RELEASE</version>
    </dependency>


    <!-- Spring ORM -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>4.3.7.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>4.3.13.RELEASE</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>6.0.6</version>
    </dependency>

    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-dbcp</artifactId>
        <version>7.0.55</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-catalina -->
    <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-catalina</artifactId>
        <version>9.0.1</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/jstl/jstl -->
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.1</version>
        <scope>provided</scope>
    </dependency>

    ...Other dependencies

</dependencies>

​

我将感谢任何帮助或指导，以使我成功地部署我的应用程序。此外，我尝试了名为OpenShift的其他web服务，并设法将我的应用程序部署到那里，但我不喜欢远程连接到mysql数据库，所以我更喜欢Heroku解决方案。但是，如果有任何其他好的web服务主机，你会推荐我是开放的建议。唯一的要求是它不需要每月花费太多的钱，因为它不会是一个庞大的应用程序，需要大量的内核和内存。

Answer 1

确保您的Procfile包含如下内容：

web: java -jar target/dependency/webapp-runner.jar --port $PORT target/*.war

您可以在使用Webapp Runner部署基于Tomcat的Java Web应用程序上的Heroku文档中了解有关使用Webapp Runner的更多信息。