Java如何取出对象里面的值 java获取对象名

1、创建工具类

package com.base.reflect;

import org.apache.commons.lang3.reflect.FieldUtils;

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

//@Slf4j
public class BeansFieldUtils {

    public static Map<String, Object> getObjectValue(Object object, Set<String> set) {
        Map<String, Object> map = new HashMap<>();
        Class<?> clz = object.getClass();
        Field[] fields = clz.getDeclaredFields();

        try {
            for (Field field : fields) {
                if (!set.contains(field.getName())) {
                    continue;
                }
                Object val = FieldUtils.readField(field, object, true);
                map.put(field.getName(), val);
            }
        } catch (Exception e) {
//            log.error("获取属性异常：{}", e);
        }

        return map;
    }

    public static Map<String, Object> getObjectValue(Object object) {
        Map<String, Object> map = new HashMap<>();
        Class<?> clz = object.getClass();
        Field[] fields = clz.getDeclaredFields();

        try {
            for (Field field : fields) {
                Object val = FieldUtils.readField(field, object, true);
                map.put(field.getName(), val);

            }
        } catch (Exception e) {
//            log.error("获取属性异常：{}", e);
        }

        return map;
    }


    public static void main(String[] args) {
        UserInfo user = new UserInfo();
        Student student = new Student();

        Map userMap = getObjectValue(user);
        Map studentMap = getObjectValue(student);

        System.out.print("user:");
        userMap.forEach((key, value) -> {
            System.out.print(key + "=" + value + ";");
        });
        System.out.println();
        System.out.print("student:");
        studentMap.forEach((key, value) -> {
            System.out.print(key + "=" + value + ";");
        });
        System.out.println();
    }
}

2、Student类

package com.base.reflect;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Student {

    private String name = "张明";

    private Integer age = 15;

    private Integer height = 181;

}

3、UserInfo类

package com.base.reflect;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class UserInfo {

    private String name = "张三 ";

    private String gender = "男";

    private Integer age = 20;

}

4、打印输出

user:gender=男;name=张三 ;age=20;
 student:name=张明;age=15;height=181;