java中使用反射将javaBean转为map

key : 字段名称
value: 字段值

 package test.utils;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import java.beans.BeanInfo;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = StartUpApplication.class,
        webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class PersontTest {

    @Test
    public void test1() throws Exception {
        Person person = new Person();
        person.setAge(22);
        person.setName("jk");
        System.out.println(person);
        Map<String, Object> map = beanToMap(person);
        System.out.println(map);
    }

    //JavaBean转换为Map
    public static Map<String, Object> beanToMap(Object bean) throws Exception {
        Map<String, Object> map = new HashMap<String, Object>();
        Class<?> cl = bean.getClass();
        //获取指定类的BeanInfo 对象
        BeanInfo beanInfo = Introspector.getBeanInfo(cl, Object.class);
        //获取所有的属性描述器
        PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();
        for (PropertyDescriptor pd : pds) {
            String key = pd.getName();
            Method getter = pd.getReadMethod();
            Object value = getter.invoke(bean);
            map.put(key, value);
        }
        return map;
    }


}