SpringBoot的ApplicationRunner

在开发中可能会有这样的情景。需要在容器启动的时候执行一些内容。比如读取配置文件，数据库连接之类的。SpringBoot给我们提供了两个接口来帮助我们实现这种需求。这两个接口分别为CommandLineRunner和ApplicationRunner。他们的执行时机为容器启动完成的时候---此时需要的bean都已经具备。

 

这两个接口中有一个run方法，我们只需要实现这个方法即可。这两个接口的不同之处在于：ApplicationRunner中run方法的参数为ApplicationArguments，而CommandLineRunner接口中run方法的参数为String数组。目前我在项目中用的是ApplicationRunner。是这么实现的：

 

 

 

/*
 * <<
 *  Davinci
 *  ==
 *  Copyright (C) 2016 - 2019 EDP
 *  ==
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *        http://www.apache.org/licenses/LICENSE-2.0
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *  >>
 *
 */

package edp.davinci.runner;

import edp.core.utils.CustomDataSourceUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.context.ApplicationContext;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

@Order(1)
@Component
@Slf4j
public class CustomDataSourceRunner implements ApplicationRunner {

    @Value("${custom-datasource-driver-path}")
    private String dataSourceYamlPath;

@Autowired
private ApplicationContext applicationContext;

@Override
public void run(ApplicationArguments args) {
        try {
            CustomDataSourceUtils.loadAllFromYaml(dataSourceYamlPath);
} catch (Exception e) {
            log.error("{}", e.getMessage());
SpringApplication.exit(applicationContext);
log.info("Server shutdown");
}
        log.info("Load custom datasource finish");
}
}

 

 

 

参考：https://blog.csdn.net/jdd92/article/details/81053404