java - 如何使用可执行jar运行spring计划任务

Question

我想开发一个独立的应用程序，它将按计划执行一些任务。我正在使用 spring @scheduled 和 taskscheduler 来实现这一点。我不能使用 spring boot，因为它需要 spring 4.* 并且我的 maven 项目依赖于其他使用 spring 3 的项目。 这是我的代码(reference):

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>
<parent>
    <groupId>com.pdp.ci</groupId>
    <artifactId>ci</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>file-requester</artifactId>
<name>file-requester</name>
<packaging>jar</packaging>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.7</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>com.pdp.ci</groupId>
        <artifactId>common-requester</artifactId>
        <version>0.0.1-SNAPSHOT</version>
        <exclusions>
            <exclusion>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpcore</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.4</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpcore</artifactId>
        <version>4.4.4</version>
    </dependency>
</dependencies>

<build>
<plugins>
<plugin>
  <!-- Build an executable JAR -->
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-jar-plugin</artifactId>
  <version>3.0.2</version>
  <configuration>
  </configuration>
</plugin>

<plugin> 
<artifactId>maven-dependency-plugin</artifactId> 
<executions> 
  <execution> 
    <phase>install</phase> 
      <goals> 
        <goal>copy-dependencies</goal> 
      </goals> 
      <configuration> 
         <outputDirectory>${project.build.directory}/lib</outputDirectory> 
      </configuration> 
    </execution> 
  </executions> 
</plugin> 
</plugins>
</build>
</project>

包含预定方法的组件类:

package com.ci.ias;

@Component
public class CustomRequester{

    @Scheduled(fixedRate=2000)
    public void processFiles(){
        logger.info("Process started");
        //task logic
    }
}

配置类:

@Configuration
@EnableScheduling
@ComponentScan(basePackages="com.ci.ias")
public class Requester implements SchedulingConfigurer {

    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        taskRegistrar.setScheduler(taskExecutor());
    }

    @Bean(destroyMethod="shutdown")
    public Executor taskExecutor() {
        return Executors.newScheduledThreadPool(100);
    }

}

我可以构建一个 jar。但无法运行，因为没有“主要”方法。如何使用命令行运行此调度程序？我是新手。谁能解释一下这是如何工作的？

谢谢。

Answer 1

如果你有 spring-boot jar(看起来你的父 jar 包含 spring-boot 的依赖项)

Spring 引导:

@SpringBootApplication
public class Application {

    public static void main(String[] args) {
        ApplicationContext ctx = SpringApplication.run(Application.class, args);


    }

}

java -jar yourjar.jar

或者只是创建一个main方法并调用那个类

public class AppMain {

    @SuppressWarnings({ "unused", "resource" })
    public static void main(String args[]){
        AbstractApplicationContext  context = new AnnotationConfigApplicationContext(Requester.class);
    }

}

然后你可以在你的 list 中添加这个主类

list .mf

Manifest-Version: 1.0
Main-Class: com.example.MainClass
Class-Path: anyjarsneededtorunapp.jar

调用java -jar yourjar.jar