java对象转MAP

package com.test.example;

import com.alibaba.fastjson.JSON;
import lombok.AllArgsConstructor;
import lombok.Builder;

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

public class MapExample {

    public static void main(String[] args) {
        Student student=Student.builder()
                .name("xuyi")
                .address("henan")
                .age(18)
                .build();
        Map<String,Object> map= toMap(student);
        System.out.println(JSON.toJSONString(map));
    }

    public static Map<String, Object> toMap(Object bean) {
        Objects.requireNonNull(bean, "Bean cannot be null");

        Class type = bean.getClass();
        Map<String, Object> map = new HashMap<>();
        try {
            BeanInfo info = Introspector.getBeanInfo(type);
            PropertyDescriptor[] descriptors = info.getPropertyDescriptors();
            for (PropertyDescriptor descriptor : descriptors) {
                String propertyName = descriptor.getName();
                switch (propertyName) {
                    case "class":
                    case "pageIndex":
                    case "pageSize":
                        continue;
                }
                Method readMethod = descriptor.getReadMethod();
                Object result = readMethod.invoke(bean);
                if (!Objects.isNull(result)) {
                    map.put(propertyName, result);
                }
            }
        } catch (IntrospectionException | InvocationTargetException | IllegalAccessException e) {
            e.printStackTrace();
        }
        return map;
    }
}

@AllArgsConstructor
@Builder
class Student{
    private String name;
    private int age;
    private String address;
}

 

本文地址：https://blog.csdn.net/weixin_42548604/article/details/114263788