Spring boot：在覆盖 spring-context 初始值设定项时尝试获取属性值时出错 控制台错误关于覆盖初始化程序

如何解决Spring boot：在覆盖 spring-context 初始值设定项时尝试获取属性值时出错 控制台错误关于覆盖初始化程序

控制台错误

2021-07-27 23:09:35.124 ERROR 20275 --- [           main] o.s.boot.SpringApplication               : Application run Failed

java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because "this.wmPort" is null
        at com.wmock.info.utilities.wiremockInitializer.initialize(wiremockInitializer.java:21) ~[test-classes/:na]

关于覆盖初始化程序

@ActiveProfiles({"test"})
public class wiremockInitializer implements ApplicationContextinitializer<ConfigurableApplicationContext> {

    private wiremockServer wiremockServer;

    @Value("${wiremock.port:2222}")
    private Integer wmPort;

    @Override
    public void initialize(ConfigurableApplicationContext configurableApplicationContext) {
        wiremockServer = new wiremockServer(wiremockConfiguration.wiremockConfig().port(wmPort));
        wiremockServer.start();

        configurableApplicationContext.addApplicationListener(applicationEvent -> {
            if (applicationEvent instanceof ContextClosedEvent) {
                wiremockServer.stop();
            }
        });

        configurableApplicationContext.getbeanfactory()
                .registerSingleton("wiremockServer",wiremockServer);
    }
}

解决方法

问题是因为 initialize 方法。

package com.wmock.info.utilities;

import lombok.Data;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

@Data
@Configuration
@ConfigurationProperties(prefix = "wiremock")
public class CustomConfig {
    private int port;

    public int getPort() {
        return port;
    }
}

public class WireMockInitializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {

    private WireMockServer wireMockServer;

    @Override
    public void initialize(ConfigurableApplicationContext configurableApplicationContext) {

        ConfigurableEnvironment environment = configurableApplicationContext.getEnvironment();
        BindResult<CustomConfig> configProps = Binder.get(environment).bind("wiremock",CustomConfig.class);

        wireMockServer = new WireMockServer(WireMockConfiguration.wireMockConfig().port(configProps.get().getPort()));
        wireMockServer.start();

        configurableApplicationContext.addApplicationListener(applicationEvent -> {
            if (applicationEvent instanceof ContextClosedEvent) {
                wireMockServer.stop();
            }
        });

        configurableApplicationContext.getBeanFactory()
                .registerSingleton("wireMockServer",wireMockServer);
    }
}