Spring Boot Autowired null

Question

我在Spring Boot项目中有几个类,有些使用@Autowired,有些则没有.我的代码如下:

Application.java(@Autowired works):

package com.example.myproject;

@ComponentScan(basePackages = {"com.example.myproject"})
@Configuration
@EnableAutoConfiguration
@EnableJpaRepositories(basePackages = "com.example.myproject.repository")
@PropertySource({"classpath:db.properties", "classpath:soap.properties"})
public class Application {

@Autowired
private Environment environment;

public static void main(String[] args) {
    SpringApplication.run(Application.class);
}

@Bean
public SOAPConfiguration soapConfiguration() {
    SOAPConfiguration SOAPConfiguration = new SOAPConfiguration();
    SOAPConfiguration.setUsername(environment.getProperty("SOAP.username"));
    SOAPConfiguration.setPassword(environment.getProperty("SOAP.password"));
    SOAPConfiguration.setUrl(environment.getProperty("SOAP.root"));
    return SOAPConfiguration;
}

HomeController(@Autowired works):

package com.example.myproject.controller;

@Controller
class HomeController {

    @Resource
    MyRepository myRepository;

MyService(@Autowired不起作用):

package com.example.myproject.service;

@Service
public class MyServiceImpl implements MyService {

    @Autowired
    public SOAPConfiguration soapConfiguration; // is null

    private void init() {
    log = LogFactory.getLog(MyServiceImpl.class);
    log.info("starting init, soapConfiguration: " + soapConfiguration);
    url = soapConfiguration.getUrl(); // booom -> NullPointerException

我没有得到SOAPConfiguration,但是当我尝试访问它时,我的应用程序因空指针异常而中断.

我已经在这里阅读了许多线程并且用Google搜索,但还没有找到解决方案.我试图提供所有必要的信息,如果有任何遗漏,请告诉我.

Answer 1

我猜你init()在自动装配之前打电话.init()使用@PostConstruct进行注释,使其在所有弹簧自动装配后自动调用.

编辑:看到你的评论后,我想你是用它来创建的new MyServiceImpl().这将从Spring中取消对MyServiceImpl的控制并将其提供给您.在这种情况下,自动装配不起作用