spring boot静态变量注入配置文件详解
本文实例为大家分享了spring boot静态变量注入配置文件的具体代码,供大家参考,具体内容如下
spring 静态变量注入
spring 中不支持直接进行静态变量值的注入,我们看一下代码:
@Component(value = "KafkaConfig")
@ConfigurationProperties(prefix = "baseConfig")
public class KafkaConfig {
private static String logBrokerList;
public static String getLogBrokerList() {
return logBrokerList;
}
public static void setLogBrokerList(String logBrokerList) {
KafkaConfig.logBrokerList = logBrokerList;
}
}
配置文件如下:
baseConfig:
logBrokerList: 10.10.2.154:9092
logTopic: test
monitorTopic: monitor
项目启动时使用 logBrokerList变量
@SpringBootApplication
public class Application {
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
System.out.println("config static test :" + KafkaConfig.getLogBrokerList());
}
}
执行结果:
config static test :null
解决办法
利用spring的set注入方法,通过非静态的setter方法注入静态变量 ,我们可以改成这样就静态变量可以获取到你配置的信息了:
@Component(value = "KafkaConfig")
@ConfigurationProperties(prefix = "baseConfig")
public class KafkaConfig {
private static String logBrokerList;
public static String getLogBrokerList() {
return logBrokerList;
}
@Value("${baseConfig.logBrokerList}")
public void setLogBrokerList(String logBrokerList) {
KafkaConfig.logBrokerList = logBrokerList;
}
}
执行结果:
config static test :10.10.2.154:9092
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