java实现两个对象之间传值及简单的封装

  
import java.lang.reflect.Field;
import java.lang.reflect.Method; 

public class Demo {
    //model是从前台接受的数据,封装的对象
    //target是从后台根据id查询到的数据,封装的对象
    public static<T> void setValue(T model,T target) throws Exception {
        //获得实体类
        Class clazz = model.getClass();
        //查看有那些字段
        Field[] fields = clazz.getDeclaredFields();
        //遍历
        for (Field field : fields) {
            //属性的名字
            String fieldName = field.getName();
            //属性的类型
            //Class<?> type = field.getType();
            //再得到getter方法的名字
            String getMethodName = "get" + (fieldName.charAt(0)+"").toUpperCase() + fieldName.substring(1);
            Method getMethod = clazz.getMethod(getMethodName);
            //判断model的哪个属性是否为空,利用get方法
            Object object = getMethod.invoke(model);
            if(object!=null) {
                //不为空就进行赋值
                // 通过属性名，来获取对应的setXXX的名字
                String setMethodName = "set" + (fieldName.charAt(0)+"").toUpperCase() + fieldName.substring(1);
                //这是set方法
                Method setMethod = clazz.getMethod(setMethodName, field.getType());
                //这里需要进行类型的强制转换吗?
                setMethod.invoke(target, object);
            }
        }
    }
}

    public static Map<String, Object> obj2Map(Object object) {
        Map<String, Object> map = new HashMap<>();
        if (object == null) {
            return map;
        }
        Class<?> clazz = object.getClass();
        Field[] fields = clazz.getDeclaredFields();
        for (Field field : fields) {
            field.setAccessible(true);
            String name = field.getName();
            Object o = null;
            try {
                o = field.get(object);
                map.put(name, o);
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
        return map;
    }

    public static Map<String, String> handleBean2Map(Object object) throws IllegalAccessException {
        Map<String, String> map = new HashMap<>();
        Class clazz = object.getClass();
        Field[] fields = clazz.getDeclaredFields();
        for (Field field : fields) {
            String name = field.getName();
            String value = String.valueOf(field.get(object));
            map.put(name, value);
        }
        return map;
    }

    public static <T> List<Map<String, Object>> map2List(Map<String, T> map) {
        List<Map<String, Object>> newList = new ArrayList<Map<String, Object>>();
        if (map == null || map.size() < 1) {
            return newList;
        }
        for (Entry<String, T> entry : map.entrySet()) {
            Map<String, Object> hashMap = new HashMap<String, Object>(2);
            hashMap.put("key", entry.geTKEy());
            hashMap.put("value", entry.getValue());
            newList.add(hashMap);
        }
        return newList;
    }