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

复制代码 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 } 复制代码 然后是主要方法和测试类

复制代码 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;
}

}