Spring-常用操作
Spring
# 初始化bean时，普通成员变量获取不到@Value注解的变量值
问题：
public class Xxx {
@Value("${value}")
private String value;
private Map<String, String> map = new HashMap<String, String>(){{
put("key", value);// value取不到值
}};
}
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修改：
public class Xxx {
@Value("${value}")
private String value;
private Map<String, String> map;
@PostConstruct
private void init(){
map = new HashMap<String, String>(){{
put("key", value);
}};
}
}
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参考：
https://blog.csdn.net/zlp1992/article/details/78346420 (opens new window)
# springboot yaml文件数组表示
array: item1, item2, item3, item4, item5
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# springboot 获取上下文
@Configuration
public class ApplicationContextConfiguration {
@Bean
public InitApplicationContext initApplicationContext() {
return new InitApplicationContext();
}
}
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public class InitApplicationContext implements ApplicationContextAware {
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
AppEnvContext.setApplicationContext(applicationContext);
}
}
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public final class AppEnvContext {
private static ApplicationContext applicationContext;
private AppEnvContext() { }
static void setApplicationContext(ApplicationContext applicationContext) {
AppEnvContext.applicationContext = applicationContext;
}
public static ApplicationContext getApplicationContext() {
return applicationContext;
}
public static Object getBean(String beanName) {
return applicationContext.getBean(beanName);
}
public static <T> T getBean(Class<T> t) {
return applicationContext.getBean(t);
}
public static <T> Map<String, T> getBeansOfType(Class<T> type) {
return applicationContext.getBeansOfType(type);
}
public static String getActiveProfile() {
return applicationContext.getEnvironment().getActiveProfiles()[0];
}
}
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String env = AppEnvContext.getActiveProfile();
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参考：
https://blog.csdn.net/qq_27818541/article/details/105719962 (opens new window)
# spring 获取对象的属性名&属性值
private void putAllField(Object obj, Map<String, Object> item) {
PropertyDescriptor[] beanProperties = ReflectUtils.getBeanProperties(obj.getClass());
try {
for (PropertyDescriptor property : beanProperties) {
Method readMethod = property.getReadMethod();
if (readMethod == null)
continue;
if (property.getPropertyType().isAssignableFrom(Date.class)) {
item.put(property.getName(), DateUtil.date2string((Date) readMethod.invoke(obj), DATA_FORMAT));
} else if (property.getPropertyType().isAssignableFrom(Double.class)) {
item.put(property.getName(), String.format("%.2f", (Double) readMethod.invoke(obj)));
} else {
item.put(property.getName(), property.getReadMethod().invoke(obj));
}
}
} catch (Exception e) {
}
}
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# 禁用swagger-ui
springfox.documentation.enabled=false
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参考:
https://stackoverflow.com/questions/66596813/springfox-boot-starter-how-to-disable-swagger-ui-for-production-profile (opens new window)
https://www.baeldung.com/swagger-ui-turn-off-in-production (opens new window)
# 删除引用jar包中的无用bean
@Component
public class RemoveRegistryBeanFactoryPostProcessor implements BeanDefinitionRegistryPostProcessor {
@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
registry.removeBeanDefinition("XXX");
}
@Override
public void postProcessBeanFactory(@NonNull ConfigurableListableBeanFactory configurableListableBeanFactory) throws BeansException {
// execute postProcessBeanFactory
}
}
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参考：
https://www.jb51.net/article/252654.htm (opens new window)