Java对象转换成Map

需求总是千奇百怪，对象转成map，看似没必要，但就是有这个需求，所以记录下来

首先是Bean

package tools;

import lombok.Data;

/**
 * 车辆实体类
 */
@Data
public class Car {

    private String id;
    private String model;//型号
    private String color;//颜色
    private String volume;//排量
    private int year;//年份
}

然后是主要方法和测试类

package tools; import java.lang.reflect.Field; import java.util.HashMap; import java.util.Map; public class MapTools { public static void main(String[] args) throws Exception{ Car car = new Car(); car.setId("00000"); car.setColor("black"); car.setModel("bmw x5"); car.setVolume("3.0L"); car.setYear(2018); System.out.println(objectToMap(car)); } /** * 将Object对象里面的属性和值转化成Map对象 * * @param obj * @return * @throws IllegalAccessException */
    public static Map<String, Object> objectToMap(Object obj) throws IllegalAccessException { Map<String, Object> map = new HashMap<String,Object>(); Class<?> clazz = obj.getClass(); for (Field field : clazz.getDeclaredFields()) { field.setAccessible(true); String fieldName = field.getName(); Object value = StringUtils.nvl(field.get(obj)); map.put(fieldName, value); } return map; } }

输出

{volume=3.0L, color=black, year=2018, model=bmw x5, id=00000}