SpringBoot配置报错之java.lang.IllegalStateException

package com.sjl.domain;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.List;
import java.util.Map;

/**
 * 建一个Person类模型，里面封装6个属性及其get、set、toString方法
 * */
@Component//将该组件注入到Spring容器中
@ConfigurationProperties(prefix = "person")
//相当于是将配置文件中所有以person开头的值注入到当前类中。   注意：在pom里要添加processor包
public class Person {
    //...
}

package com.test;

import com.springboot.app.SpringbootexerciseApplication;
import org.junit.Test;
import org.junit.runner.RunWith;
import com.sjl.domain.Person;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SpringbootexerciseApplication.class)
public class test {
    @Autowired
    private Person person;

    @Test
    public void contextLoads() {
        System.out.println("person="+person);
    }
}

package com.springboot.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication(scanBasePackages = "com.sjl.*")
public class SpringbootexerciseApplication {

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

}