Main
public static void main(String[] args) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
Class<MyReflect> clazz = MyReflect.class;
Constructor<MyReflect> constructor = clazz.getConstructor();
MyReflect myReflect = constructor.newInstance();
Field[] fields = clazz.getFields();
for(Field field : fields) {
MyAnnotation myAnnotation = field.getAnnotation(MyAnnotation.class);
String val = myAnnotation.value();
String fieldName = field.getName();
String methodName = "set" + fieldName.substring(0, 1).toUpperCase() + fieldName.substring(1);
Method method = clazz.getMethod(methodName, String.class);
method.invoke(myReflect, val);
}
System.out.println(myReflect);
}
MyReflect
public class MyReflect {
@MyAnnotation("zhangsan")
public String name;
@MyAnnotation("18")
public String age;
@MyAnnotation("男")
public String sex;
@Override
public String toString() {
return "MyReflect{" +
"name='" + name + '\'' +
", age='" + age + '\'' +
", sex='" + sex + '\'' +
'}';
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
}
MyAnnotation
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
@Inherited
public @interface MyAnnotation {
String value();
}