Java反射/常用操作

注意

• getter和setter方法的命名要规范
• PropertyDescriptor（jdk1.8）：要求setter返回值为void
• lombok的@Accessors(chain = true)：链式调用注解，setter方法返回对象本身

Main

public class Main {
    public static void main(String[] args) throws Exception {
        Student xcrj = new Student();
        xcrj.setName("xcrj");
        Map namevalueMap = getObjFieldNamevalue(xcrj);
    }

    public static Map getObjFieldNamevalue(Object obj) throws Exception {
        Class clazz = obj.getClass();
        Map map = new HashMap<>();
        // getDeclaredFields
        Field[] declaredFields = clazz.getDeclaredFields();
        for (Field field : declaredFields) {
            String fieldName = field.getName();
            // PropertyDescriptor
            PropertyDescriptor pd = new PropertyDescriptor(fieldName, clazz);
            // getMethod
            Method getMethod = pd.getReadMethod();
            Object value = getMethod.invoke(obj);
            map.put(fieldName, value);
        }

        return map;
    }
}