java | spring boot 利用反射获取属性值

这是我在某一个项目中的应用，在 spring boot 项目中利用反射获取 Bean 中的属性。

package com.lou.springboot;

import com.alibaba.fastjson2.JSON;
import lombok.Data;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

import java.lang.reflect.Field;

@SpringBootApplication
public class Application {

public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
        ConfigurableApplicationContext configurableApplicationContext = SpringApplication.run(Application.class, args);
        Run run = configurableApplicationContext.getBean(Run.class);
        run.proc();
    }


}


@Data
class Persons {
    private String name1;
    private Integer age1;

private String name2;
    private Integer age2;
}

@Service
class PersonService {
    public void proc(String cppMsg) throws NoSuchFieldException, IllegalAccessException {
        Persons person = JSON.parseObject(cppMsg, Persons.class);

Field field = person.getClass().getDeclaredField("name1");
        field.setAccessible(true);
        System.out.println(field.get(person));
    }
}

@Component
class Run {

@Autowired
    private PersonService personService;

public void proc() throws NoSuchFieldException, IllegalAccessException {
        personService.proc("{\"age1\":12,\"name1\":\"Antony\",\"age2\":22,\"name2\":\"tony\"}");
    }
}