springboot读取配置文件的方式

前三种测试配置文件为springboot默认的application.properties文件。

一、@ConfigurationProperties方式

自定义配置文件

 

自定义配置类：PropertiesConfig.java,加载自定义配置文件实体类并生成set和get方法

注入自定义实体类，用get方法获取数据 

 

二、使用@Value注解方式

 

三、使用Environment

注入Environment 使用getProperty获取数据 

 

四、使用PropertiesLoaderUtils

app-config.properties

 

#### 通过注册监听器(`Listeners`) + `PropertiesLoaderUtils`的方式
com.battle.type=Springboot - Listeners
com.battle.title=使用Listeners + PropertiesLoaderUtils获取配置文件
com.battle.name=zyd
com.battle.address=Beijing
com.battle.company=in

PropertiesListener.java 用来初始化加载配置文件

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 加载配置文件内容

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 启动类

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 {
    /** * * 第四种方式：通过注册监听器(`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);
        // 第四种方式：注册监听器 application.addListeners(new PropertiesListener("app-config.properties")); application.run(args); } }

访问结果：

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