Map和对象相互转换

list实体类转换成map

    //list实体类转换成map
    public static List<Map<String, Object>> EntityConvertMap(List<LqczTempTjVo> list) {
        List<Map<String, Object>> l = new LinkedList<>();
        try {
            for (LqczTempTjVo t : list) {
                Map<String, Object> map = new HashMap<>();
                Method[] methods = t.getClass().getMethods();
                for (Method method : methods) {
                    if (method.getName().startsWith("get")) {
                        String name = method.getName().substring(3);
                        name = name.substring(0, 1).toLowerCase() + name.substring(1);
                        Object value = method.invoke(t);
                        map.put(name, value);
                    }
                }
                l.add(map);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return l;
    }

对象转map

    /**
     * 对象转map
     *
     * @param object
     * @return
     */
    public static Map<String, Object> entityToMap(Object object) {
        Map<String, Object> map = new HashMap<>();
        if (!CommonUtils.isEmpty(object)) {
            for (Field field : object.getClass().getDeclaredFields()) {
                try {
                    boolean flag = field.isAccessible();
                    field.setAccessible(true);
                    Object o = field.get(object);
                    map.put(field.getName(), o);
                    field.setAccessible(flag);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return map;
    }

map转对象

    /**
     * 把source转为target
     *
     * @param source source
     * @param target target
     * @param <T>    返回值类型
     * @return 返回值
     * @throws Exception newInstance可能会抛出的异常
     */
    public static <T> T mapToObj(Map source, Class<T> target) throws Exception {
        Field[] fields = target.getDeclaredFields();
        T o = target.newInstance();
        for(Field field:fields){
            Object val;
            if((val=source.get(field.getName()))!=null){
                field.setAccessible(true);
                field.set(o,val);
            }
        }
        return o;
    }