在Java中,可以使用反射機(jī)制來(lái)獲取對(duì)象的屬性值。下面是一個(gè)簡(jiǎn)單的示例代碼:
import java.lang.reflect.Field;
public class Main {
public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
// 創(chuàng)建一個(gè)對(duì)象
Person person = new Person("John", 25);
// 獲取屬性值
String name = (String) getValue(person, "name");
int age = (int) getValue(person, "age");
// 輸出屬性值
System.out.println("Name: " + name);
System.out.println("Age: " + age);
}
// 獲取對(duì)象的屬性值
public static Object getValue(Object object, String fieldName) throws NoSuchFieldException, IllegalAccessException {
// 獲取對(duì)象的Class對(duì)象
Class<?> clazz = object.getClass();
// 獲取屬性
Field field = clazz.getDeclaredField(fieldName);
// 設(shè)置屬性可訪問(wèn)
field.setAccessible(true);
// 獲取屬性值
return field.get(object);
}
}
class Person {
private String name;
private int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
// getters and setters...
}
在上面的示例中,“Person"類有兩個(gè)私有屬性"name"和"age”。通過(guò)反射的方式,可以獲取和輸出這兩個(gè)屬性的值。