springboot-14-自定义properties文件值注入javaBean中

被这个问题困扰了好几天....

在spring中, 从资源文件向bean中注入值非常简单, 只需要properties文件被spring加载, 然后在被spring管理的类写响应的属性, 然后 @Value("${SERVER_URL") 的方式就可以取到值了

在springboot中, 同样的方式也可以取到值, 但未免感觉有点low, 所以苦苦寻觅好几天,

在这儿以创建一个ESClient的方式进行说明:

0, 在pom.xml中导入依赖

为什么叫0呢, 因为你不导入, 加上(1) 的注解, 会有警告黄线提示你导入

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

1, 在App.java中加入注解

@EnableConfigurationProperties

我的类上有注解, @EnableAutoConfiguration, 所以没有加

2, 将  elasticsearch.properties  文件放置在 source/ES/下

3, 然后在需要注入的类上加入注解:

@Component
@ConfigurationProperties(prefix = "escluster.transport")
@PropertySource("classpath:ES/elasticsearch.properties")

因为 5.1.0 以后, 取消了ConfigurationProperties中location属性, 所以使用 PropertySource 进行了替代, 也正是这个注解需要步骤一种的注解

查了挺多博客才找到原因: http://www.jianshu.com/p/b71845c142d0, 为此还找了个vpn, 挺好用, 想要可以联系 [e-mail]

4, 完整的ESClient类代码

package com.iwhere.easy.travel.tool;

import java.net.InetSocketAddress;

import org.elasticsearch.client.Client;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.transport.InetSocketTransportAddress;
import org.elasticsearch.transport.client.PreBuiltTransportClient;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

/**
 * 获取esclient工具类
 *
 * @author wenbronk
 * @time 2017年4月5日 上午11:29:52 2017
 */
@Component
@ConfigurationProperties(prefix = "escluster.transport")
@PropertySource("classpath:ES/elasticsearch.properties")
public class ESClient {
    private Logger LOGGER = LoggerFactory.getLogger(ESClient.class);

    private String name;
    private String ip;
    private int port;

    private boolean sniff;
    private boolean ignore_cluster_name;
    private int ping_timeout;
    private int nodes_sampler_interval;

    /**
     * @return
     */
    @Bean(name = "client")
    public Client getEsClient() {
        Client client = null;
        Settings settings = Settings.builder().put("cluster.name", name)
                .put("client.transport.sniff", sniff)
                // .put("client.transport.ignore_cluster_name",
                // ESCLUSTER_IGNORE_NAME)
                // .put("client.transport.ping_timeout", ESCLUSTER_TIMEOUT)
                // .put("client.transport.nodes_sampler_interval",
                // ESCLUSTER_INTERVAL)
                .build();
        client = new PreBuiltTransportClient(settings).addTransportAddress(
                new InetSocketTransportAddress(new InetSocketAddress(ip, port)));
        LOGGER.info("transport client has created ");
        return client;
    }

    public Logger getLOGGER() {
        return LOGGER;
    }

    public void setLOGGER(Logger lOGGER) {
        LOGGER = lOGGER;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getIp() {
        return ip;
    }

    public void setIp(String ip) {
        this.ip = ip;
    }

    public int getPort() {
        return port;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public boolean isSniff() {
        return sniff;
    }

    public void setSniff(boolean sniff) {
        this.sniff = sniff;
    }

    public boolean isIgnore_cluster_name() {
        return ignore_cluster_name;
    }

    public void setIgnore_cluster_name(boolean ignore_cluster_name) {
        this.ignore_cluster_name = ignore_cluster_name;
    }

    public int getPing_timeout() {
        return ping_timeout;
    }

    public void setPing_timeout(int ping_timeout) {
        this.ping_timeout = ping_timeout;
    }

    public int getNodes_sampler_interval() {
        return nodes_sampler_interval;
    }

    public void setNodes_sampler_interval(int nodes_sampler_interval) {
        this.nodes_sampler_interval = nodes_sampler_interval;
    }
}

现在就完成了springboot从properties文件向bean中注值问题的解决

写在最后, 不要在构造方法中使用 @Autowired的值, 猜测应该是对象创建完成后才会对值进行导入, 再次坑了很久

对于yml格式的文件, 注入值的方式为:

@Component
@ConfigurationProperties(prefix = "interface.server.url")
// @PropertySource("classpath:server_url.yml")
public class BaseInterfaceUtil {
    private static Logger LOGGER = LoggerFactory.getLogger(BaseInterfaceUtil.class);

    private String geosot;

        @setGet
}

yml文件的书写格式:

如果是单独的properties文件, 也可以使用

ResourceBundle.getBundle("fileName")

他会默认加载 classpath: 下的 fileName.properties文件, 并存入一个map集合中

5, 如果直接在application.yml中写配置, 可以

package rdp.hive.phone.job.conf;

import com.google.common.collect.Lists;
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.client.RestHighLevelClient;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.Arrays;

/**
 *
 */

@Component
@ConfigurationProperties(prefix = "es.connect")
public class EsClientConfig {

    private String hosts;
    private Integer port;

    @Bean
    @ConditionalOnMissingBean(RestHighLevelClient.class)
    public RestHighLevelClient getRestHighLevelClient() {
        ArrayList<HttpHost> hostsArray = Lists.newArrayList();
        Arrays.stream(hosts.split(", *")).forEach(host -> {
            hostsArray.add(new HttpHost(host, port, "http"));
        });
        return new RestHighLevelClient(RestClient.builder(hostsArray.toArray(new HttpHost[])));
    }

    public String getHosts() {
        return hosts;
    }

    public void setHosts(String hosts) {
        this.hosts = hosts;
    }

    public Integer getPort() {
        return port;
    }

    public void setPort(Integer port) {
        this.port = port;
    }
}

然后在yml中配置:

系列原创, 转载请注明出处, 谢谢 @wenbronk