SpringBoot static修饰的字段/方法如何获取application.yml配置

SpringBoot的application.yml一种特殊的应用场景，一般我们获取application.yml的配置文件只要@Value就可以获取到值了，但是如果是static修饰的字段肯定就不能用这种方法了

方法一

　　private static String systemUrl;

　　//static静态方法获取配置文件
    @Value("${xx.xx}")
    public  void setSystemUrl(String systemUrl) {
        this.systemUrl = systemUrl;
    }

方法二

首先我们在static修饰的字段添加set方法，然后再@Configuration配置类中进行初始化set值进去。下面是我们@Configuration配置类代码

@Component
@ConfigurationProperties(prefix = "spring.datasource")
public class DruidConfigProperties {

    private int initialSize;
    private int minIdle;
    private int maxActive;
    private int maxWait;
    private int timeBetweenEvictionRunsMillis;
    private int minEvictableIdleTimeMillis;
    private String validationQuery;
    private boolean testWhileIdle;
    private boolean testOnBorrow;
    private boolean testOnReturn;
    private boolean poolPreparedStatements;
    private int maxPoolPreparedStatementPerConnectionSize;
    private String filters;
    private String connectionProperties;
    private boolean useGlobalDataSourceStat;

    public int getInitialSize() {
        return initialSize;
    }

    public void setInitialSize(int initialSize) {
        this.initialSize = initialSize;
    }

    public int getMinIdle() {
        return minIdle;
    }

    public void setMinIdle(int minIdle) {
        this.minIdle = minIdle;
    }

    public int getMaxActive() {
        return maxActive;
    }

    public void setMaxActive(int maxActive) {
        this.maxActive = maxActive;
    }

    public int getMaxWait() {
        return maxWait;
    }

    public void setMaxWait(int maxWait) {
        this.maxWait = maxWait;
    }

    public int getTimeBetweenEvictionRunsMillis() {
        return timeBetweenEvictionRunsMillis;
    }

    public void setTimeBetweenEvictionRunsMillis(int timeBetweenEvictionRunsMillis) {
        this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
    }

    public int getMinEvictableIdleTimeMillis() {
        return minEvictableIdleTimeMillis;
    }

    public void setMinEvictableIdleTimeMillis(int minEvictableIdleTimeMillis) {
        this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
    }

    public String getValidationQuery() {
        return validationQuery;
    }

    public void setValidationQuery(String validationQuery) {
        this.validationQuery = validationQuery;
    }

    public boolean isTestWhileIdle() {
        return testWhileIdle;
    }

    public void setTestWhileIdle(boolean testWhileIdle) {
        this.testWhileIdle = testWhileIdle;
    }

    public boolean isTestOnBorrow() {
        return testOnBorrow;
    }

    public void setTestOnBorrow(boolean testOnBorrow) {
        this.testOnBorrow = testOnBorrow;
    }

    public boolean isTestOnReturn() {
        return testOnReturn;
    }

    public void setTestOnReturn(boolean testOnReturn) {
        this.testOnReturn = testOnReturn;
    }

    public boolean isPoolPreparedStatements() {
        return poolPreparedStatements;
    }

    public void setPoolPreparedStatements(boolean poolPreparedStatements) {
        this.poolPreparedStatements = poolPreparedStatements;
    }

    public int getMaxPoolPreparedStatementPerConnectionSize() {
        return maxPoolPreparedStatementPerConnectionSize;
    }

    public void setMaxPoolPreparedStatementPerConnectionSize(int maxPoolPreparedStatementPerConnectionSize) {
        this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;
    }

    public String getFilters() {
        return filters;
    }

    public void setFilters(String filters) {
        this.filters = filters;
    }

    public String getConnectionProperties() {
        return connectionProperties;
    }

    public void setConnectionProperties(String connectionProperties) {
        this.connectionProperties = connectionProperties;
    }

    public boolean isUseGlobalDataSourceStat() {
        return useGlobalDataSourceStat;
    }

    public void setUseGlobalDataSourceStat(boolean useGlobalDataSourceStat) {
        this.useGlobalDataSourceStat = useGlobalDataSourceStat;
    }

    @Bean
    public int initStatic(){
        DataSourceUtil.setProperties(this);
        return 0;
    }

    @Override
    public String toString() {
        return "DruidConfigProperties{" +
                "initialSize=" + initialSize +
                ", minIdle=" + minIdle +
                ", maxActive=" + maxActive +
                ", maxWait=" + maxWait +
                ", timeBetweenEvictionRunsMillis=" + timeBetweenEvictionRunsMillis +
                ", minEvictableIdleTimeMillis=" + minEvictableIdleTimeMillis +
                ", validationQuery='" + validationQuery + '\'' +
                ", testWhileIdle=" + testWhileIdle +
                ", testOnBorrow=" + testOnBorrow +
                ", testOnReturn=" + testOnReturn +
                ", poolPreparedStatements=" + poolPreparedStatements +
                ", maxPoolPreparedStatementPerConnectionSize=" + maxPoolPreparedStatementPerConnectionSize +
                ", filters='" + filters + '\'' +
                ", connectionProperties='" + connectionProperties + '\'' +
                ", useGlobalDataSourceStat=" + useGlobalDataSourceStat +
                '}';
    }
}

　　

参考：https://blog.csdn.net/linzhiqiang0316/article/details/81516558