一、利用@PropertySource獲取resource下面的資源，Environment獲取屬性

@Configuration
@EnableTransactionManagement
@PropertySource(value = {"classpath:DBsource.properties"})
public class DBBeanConfig {
    @Autowired
private Environment env;

    @Bean(destroyMethod = "close")
    public DataSource dataSource(){
        DruidDataSource dataSource = new 
 
DruidDataSource();
        dataSource.setDriverClassName(env.getProperty("source.driverClassName").trim());
        dataSource.setUrl(env.getProperty("source.url").trim());
        dataSource.setUsername(env.getProperty("source.username").trim());
        dataSource.setPassword(env.getProperty("source.password"
 
).trim());
        return dataSource;
    }

}

二、@PropertySource獲取resource下面的資源，@ConfigurationProperties找到該資源的頭部@Value注入屬性.

@PropertySource({"classpath:redis-config.properties"})
@ConfigurationProperties(prefix="spring.redis")
public class RedisConfig {

    @Value("${host}")
    private  String  host;
    @Value
 
("${port}")
    private  int  port;
}

三、@ConfigurationProperties找到該資源的頭部，通過getter、setter方法注入及獲取配置

@PropertySource({"classpath:redis-config.properties"})
@ConfigurationProperties(prefix="spring.redis")
public class RedisConfig2 {

    private  String  host;
    private  int  port;

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public int getPort() {
        return port;
    }

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

四、若是獲取yml中的屬性，可以直接注入

@Value("${spring.redis.host}")

private static String host；

五、利用PropertiesLoaderUtil載入配置檔案

public class RedisConfig3 {

    public static String  host;
    public static int  port;
    private static String property="redis-config.properties";

    private static RedisConfig3 mConfig;
    static {
        mConfig=loadConfig();
    }
    public  static  RedisConfig3 loadConfig(){
        if (mConfig==null){
            mConfig=new RedisConfig3();
            Properties properties = null;
            try {
                properties = PropertiesLoaderUtils.loadAllProperties(property);

                host=properties.getProperty("spring.redis.host");
                port=Integer.valueOf(properties.getProperty("spring.redis.port"));
                System.out.println(host+":"+port);
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
        return mConfig;
    }

    public RedisConfig3 getInstance(){
        return mConfig;
    }
}