Java——获取实体类默认值

/**
     * 获取实体类默认值
     * @param o
     * @throws Exception
     */
    public static void getDefaultData(Object o) throws Exception {
        Class<? extends Object> clas = o.getClass();
        Method[] methods = clas.getMethods();
        for (Method m : methods) {
            String methodName = m.getName();
            if (methodName.startsWith("set")) {
                String getMethod = methodName.substring(3);
                Method method = clas.getMethod("get" + getMethod);
                Object invoke = method.invoke(o);
                if (invoke == null) {
                    Type[] genericParameterTypes = m.getGenericParameterTypes();
                    if (genericParameterTypes[0] == String.class) {
                        m.invoke(o, "-");
                    } else if (genericParameterTypes[0] == Integer.class) {
                        m.invoke(o, Integer.valueOf("0"));
                    }
                }
            }
        }
    }