springboot读取properties

最新推荐文章于 2024-05-10 10:58:32 发布

原创最新推荐文章于 2024-05-10 10:58:32 发布 · 189 阅读

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本文介绍了三种在Spring Boot中加载配置文件的方法：使用@ConfigurationProperties、@Value和静态配置。通过实例展示了如何从properties文件中读取配置并应用于Java类。

1、ConfigurationProperties

需要在主类添加注解

@EnableConfigurationProperties(PropertiesLoadConfig.class)

@Component
@ConfigurationProperties(prefix = "com.yu.springboot")
@PropertySource("classpath:settingconfig.properties")
public class PropertiesLoadConfig {
    private String author;

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }
}

2、

@Component
@PropertySource("classpath:settingconfig.properties")
public class PropertiesLoadConfig2 {
    @Value("${com.yu.springboot.author}")
    private String author;

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }
}

3、静态配置

public class SettingConst {
    public static String author;

    static {
        PropertiesUtils.setProperties(SettingConst.class,"src/main/resources/settingconfig2.properties");
    }
}

public class PropertiesUtils {
    public static Properties getConfig(String name){
        Properties properties = null;
        try{
            properties = new Properties();
//            InputStream is = PropertyUtil.class.getClassLoader().getResourceAsStream(name);
            File file = ResourceUtils.getFile(name);
            InputStream is = new FileInputStream(file);
            BufferedReader bf = new BufferedReader(new InputStreamReader(is));
            properties.load(bf);
            is.close();
        }catch (Exception ex){
            ex.printStackTrace();
        }

        return properties;
    }


    /**
     * 读取配置参数，赋值到静态属性中
     * @param c
     * @param path
     */
    public static void setProperties(Class c,String path){
        Properties properties = getConfig(path);
        Field[] fields = c.getFields();
        for (Field f: fields
             ) {
            f.setAccessible(true);
            try {
                f.set(null,properties.getProperty(f.getName()));
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
    }
}