Question

我无法访问控制器或服务中的import tensorflow as tf from tensorflow import keras import numpy as np training_inputs = np.array([[0,0,1], [1,1,1], [1,0,1], [0,1,1]]) training_outputs = np.array([[0,1,1,0]]) model = keras.Sequential([ keras.layers.Flatten(input_shape=(1,3)), keras.layers.Dense(1,activation="sigmoid") ]) model.compile(optimizer = "rmsprop", loss = "binary_crossentropy", metrics = ["accuracy"]) model.fit(training_inputs,training_outputs,epochs=1) prediction = model.predict(np.array([[1,1,0]]))或事件@Value("${app.version}")或任何属性。

我的项目结构如下

environment.getProperty("app.version")

我的UiAppInitializer非常简单， src/main/java -configuration/ AppConfig.java EnvConfig.java JpaConfig.java UiConfig.java ServicesConfig.java UiAppInitializer.java -repositories/ .... -models/ .... -services/ .... -controllers/ ....返回getRootConfigClassess()，而AppConfig.class返回getServletConfigClasses()

AppConfig.java

UiConfig.class

EnvConfig

@Configuration
@Import({
EnvConfig.class,
UiConfig.class,
ServicesConfig.class
})
public class AppConfig{}

一个简单的控制器

@Configuration
public class EnvConfig implements InitializingBean {

    @Value("${app.version}")
    private String appVersion
    @Bean
    public static PropertySourcesPlaceholderConfigurer properties() {
        PropertySourcesPlaceholderConfigurer pc = new PropertySourcesPlaceholderConfigurer();
        pc.setLocations(new ClassPathResource("application.properties"));
        return pc;
    }

    @Override
    public void afterpropertiesSet() throws Exception {
      log.debug("App Version is " + appVersion);
    }
}

@RestController
@RequestMapping(value = "/version")
public class VersionContoller {

    @Value("${app.version}")
    private String version;

    @GetMapping()
    public String getVersion() {
           return version;
    }
}

控制器仅返回“ $ {app.version}”，但是@Configuration @EnableWebMvc @ComponentScan(basePackages = { "my.packages.path.ui" }) public class UiConfig implements WebMvcConfigurer { .... }正确地记录了版本。

我在这里做错了什么？我还有其他控制器已成功连接到存储库，该控制器是在JpaConfig中设置的，它也为所有属性使用afterpropertiesSet

注意不使用Spring Boot

Answer 1

似乎在properties() bean被调用setLocations()之前，控制器已被初始化为bean。您可以删除类路径扫描（我假设您已找到它来找到控制器bean？），然后在EnvConfig中声明一个新方法，该方法是传入String版本的Controller的bean声明。显然也需要更改控制器构造函数

@Configuration
public class EnvConfig implements InitializingBean {

    @Value("${app.version}")
    private String appVersion
    @Bean
    public static PropertySourcesPlaceholderConfigurer properties() {
        PropertySourcesPlaceholderConfigurer pc = new PropertySourcesPlaceholderConfigurer();
        pc.setLocations(new ClassPathResource("application.properties"));
        return pc;
    }

    @Bean
    public VersionContoller controller() {
        return new VersionController(appVersion);
    }

    @Override
    public void afterpropertiesSet() throws Exception {
      log.debug("App Version is " + appVersion);
    }
}

无法跨不同的程序包访问Spring项目中的@Value，并且Environment也不包含值

1 个答案: