springboot讀取配置文件的方式

前三種測試配置文件為springboot默認的application.properties文件。

一、@ConfigurationProperties方式

自定義配置文件

 

自定義配置類：PropertiesConfig.java,加載自定義配置文件實體類並生成set和get方法

注入自定義實體類，用get方法獲取數據 

 

二、使用@Value注解方式

 

三、使用Environment

注入Environment 使用getProperty獲取數據 

 

四、使用PropertiesLoaderUtils

app-config.properties

 

#### 通過注冊監聽器(`Listeners`) + `PropertiesLoaderUtils`的方式
com.battle.type=Springboot - Listeners
com.battle.title=使用Listeners + PropertiesLoaderUtils獲取配置文件
com.battle.name=zyd
com.battle.address=Beijing
com.battle.company=in

PropertiesListener.java 用來初始化加載配置文件

import org.springframework.boot.context.event.ApplicationStartedEvent;
import org.springframework.context.ApplicationListener;
import com.zyd.property.config.PropertiesListenerConfig;
public class PropertiesListener implements ApplicationListener<ApplicationStartedEvent> {
    private String propertyFileName;
    public PropertiesListener(String propertyFileName) {
        this.propertyFileName = propertyFileName;
    }
    @Override public void onApplicationEvent(ApplicationStartedEvent event) {
        PropertiesListenerConfig.loadAllProperties(propertyFileName);
    }
}

PropertiesListenerConfig.java 加載配置文件內容

import org.springframework.boot.context.event.ApplicationStartedEvent;
import org.springframework.context.ApplicationListener;
import com.zyd.property.config.PropertiesListenerConfig;
public class PropertiesListener implements ApplicationListener<ApplicationStartedEvent> {
    private String propertyFileName;
    public PropertiesListener(String propertyFileName) {
        this.propertyFileName = propertyFileName;
    }
    @Override public void onApplicationEvent(ApplicationStartedEvent event) {
        PropertiesListenerConfig.loadAllProperties(propertyFileName);
    }
}

Applaction.java 啟動類

import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.zyd.property.config.PropertiesListenerConfig;
import com.zyd.property.listener.PropertiesListener;

@SpringBootApplication @RestController public class Applaction {
    /** * * 第四種方式：通過注冊監聽器(`Listeners`) + `PropertiesLoaderUtils`的方式 * * @author zyd * @throws UnsupportedEncodingException * @since JDK 1.7 */
    @RequestMapping("/listener") public Map<String, Object> listener() {
        Map<String, Object> map = new HashMap<String, Object>();
        map.putAll(PropertiesListenerConfig.getAllProperty());
        return map;
    }
    public static void main(String[] args) throws Exception {
        SpringApplication application = new SpringApplication(Applaction.class);
        // 第四種方式：注冊監聽器 application.addListeners(new PropertiesListener("app-config.properties")); application.run(args); } }

訪問結果：

{"com.battle.name":"zyd",
"com.battle.address":"Beijing",
"com.battle.title":"使用Listeners + PropertiesLoaderUtils獲取配置文件",
"com.battle.type":"Springboot - Listeners",
"com.battle.company":"in"}