使用胖 Jar 插件和 Spring Boot 应用程序构建的 Gradle 给出“应用程序启动失败”

Question

使用Intellij 启动我的应用程序时一切正常。但是当我制作fatJar（使用gradle插件：eu.appsatori.fatjar）并执行时：

java -jar myapp.jar

我得到了这样的东西：

11:41:01.224 [main] ERROR org.springframework.boot.SpringApplication - Application startup failed
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to process import candidates for configuration class [my.testing.MyAppMain]; nested exception is java.lang.IllegalArgumentException: No auto configuration classes found in META-INF/spring.factories. If you are using a custom packaging, make sure that file is correct.
        at org.springframework.context.annotation.ConfigurationClassParser.processDeferredImportSelectors(ConfigurationClassParser.java:482)
        at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:184)
...

在META-INF/spring.factories 中似乎没有找到自动配置类。

如何添加这个文件？它的内容应该是什么？

我有以下构建脚本：

apply plugin: "java";
apply plugin: "idea";
apply plugin: 'application'
apply plugin: 'eu.appsatori.fatjar'
apply plugin: 'org.springframework.boot'

repositories {
    mavenCentral()
}

buildscript {
    ext {
        springBootVersion = '1.4.3.RELEASE'
    }

    repositories {
        mavenCentral()
        jcenter()
    }

    dependencies {
        classpath "org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}"
        classpath "eu.appsatori:gradle-fatjar-plugin:0.3"
    }
}

sourceSets {
    main {
        java {
            srcDir 'src/main/java'
        }

        resources {
            srcDir 'src/main/resources'
        }
    }

    test {
        java {
            srcDir 'src/test/java'
        }
    }
}

fatJar {
    manifest {
        attributes("Main-Class": 'my.testing.MyAppMain')
    }

    exclude 'META-INF/*.DSA'
    exclude 'META-INF/*.SF'
    exclude 'META-INF/*.RSA'
}

dependencies {
    compile 'org.springframework.boot:spring-boot-starter-jdbc'
    runtime 'mysql:mysql-connector-java'

    testCompile 'org.springframework.boot:spring-boot-starter-test'

}

我的示例代码是：

package my.testing;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;

@SpringBootApplication
public class MyAppMain {
    private ConfigurableApplicationContext springContext;

    @Autowired
    private SimpleDao dao;

    public static void main(String[] args) throws Exception {
        MyAppMain test = new MyAppMain();
        try {
            test.init();
            test.doWhatYouGotToDo();
        } finally {
            test.stop();
        }
    }

    private void doWhatYouGotToDo() {
        System.out.println("Auto-wired dao: " + dao.hashCode());
        System.out.println("Auto-wired jdbcTemplate: " + dao.jdbcTemplate.hashCode());
    }

    private void init() throws Exception {
        springContext = SpringApplication.run(MyAppMain.class);
        springContext.getAutowireCapableBeanFactory().autowireBean(this);
    }

    private void stop() throws Exception {
        springContext.close();
    }
}

@Component
class SimpleDao {

    @Autowired
    JdbcTemplate jdbcTemplate;
}

application.properties文件：

spring.datasource.driver-class-name = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/some_db?useSSL=false&serverTimezone=UTC
spring.datasource.username = some_user
spring.datasource.password = some_pass

注意：此问题基于SpringBoot - making jar files - No auto configuration classes found in META-INF/spring.factories 所有答案都指使用Maven 构建。请在此处仅填写与Gradle 相关的答案。

Answer 1

虽然我主要使用 Maven for Spring 和 Gradle for Android，但这里是 Spring 项目的 gradle 方式：

gradle clean build
gradle bootRepackage

结果：

这是我的 build.gradle 文件：