首先先創建一個User
- private String name;
- private Integer age;
- private Double height;
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public Integer getAge() {
- return age;
- }
- public void setAge(Integer age) {
- this.age = age;
- }
- public Double getHeight() {
- return height;
- }
- public void setHeight(Double height) {
- this.height = height;
- }
假設現在獲取name這個屬性,並同時給這個User取名爲張三
- public static void main(String[] args) {
- User user1 = new User();
- try {
- Field field = User.class.getDeclaredField("name");
- //setAccessible這行代碼把對象上的name字段設置爲public訪問屬性.
- field.setAccessible(true);
- // 設置該user1的name屬性
- field.set(user1, "zhangsan");
- System.out.println(user.getName());
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
在這裏能看見
- field.setAccessible(true);
可以看上面User類,該類下的所有屬性都是private的訪問權限,如果將setAccessible註釋掉,系統將給出IllegalAc