Question

我有以下application.yml文件，我想在控制台或其他任何地方读取和显示数据。

security:
  Test :
      Name:'anyname'
      Username:'user1023'
      Password:'pass'
      Salary:'290378'
      Address:'203 LA'
      PhoneNo:+13457938549

  DEV :
      Name:'anyname1'
      Username:'user1022'
      Password:'bgjsl'
      Salary:'290378'
      Address:'203 LA'
      PhoneNo:+13457938549

我的服务等级

@Service
public class EmployeeService {
       //For testing,getting data
        private Map<String, WebConfig.Project> projects;
        @Autowired
        public EncryptionService(WebConfig config) {
            this.projects = config.getMyConfig();
            projects.get("DEV").getName();
            projects.get("DEV").getUsername();
            projects.get("DEV").getPassword();
            projects.get("DEV").getSalary();
            projects.get("DEV").getAddress();
            projects.get("DEV").getPhoneNo(); 
        } 
}

//我的配置类

@Configuration
@ConfigurationProperties(prefix = "security")
public class WebConfig implements Serializable{

public Map<String, Project> getMyConfig() {
        return myConfig;
    }   
public static class Project{
      Name
      Username
      Password
      Salary
      Address
      PhoneNo
//getter and setter

}
}

并且在运行此应用程序时出现错误，所以我有两个问题第一个是在控制台中显示数据，另一个是在创建名为EmployeeService的bean时出错。该代码有什么问题？

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.config.EmployeeService]: Constructor threw exception; nested exception is java.lang.NullPointerException
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:213) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:117) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:310) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    ... 19 common frames omitted
Caused by: java.lang.NullPointerException: null
    at com.config.encrypt.EmployeeService.<init>(EmployeeService.java:15) ~[classes/:na]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_231]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_231]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_231]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_231]
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:200) ~[spring-beans-5.2.2.RELEASE.jar:5.2.2.RELEASE]
    ... 21 common frames omitted

使用employeeService从bean创建application.yml文件错误获取数据

0 个答案: