java 反射通过get方法获得属性值

来源：互联网发布：我的世界pe拔刀剑js 编辑：程序博客网时间：2024/06/05 18:44

1、根据对象获得所有字段的值
public static void method(Object obj) {
try {
Class clazz = obj.getClass();
Field[] fields = obj.getClass().getDeclaredFields();//获得属性
for (Field field : fields) {
PropertyDescriptor pd = new PropertyDescriptor(field.getName(),
clazz);
Method getMethod = pd.getReadMethod();//获得get方法
Object o = getMethod.invoke(obj);//执行get方法返回一个Object
System.out.println(o);
}
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IntrospectionException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}

2、通过对象和具体的字段名字获得字段的值
public static void method(Object obj, String filed) {
try {
Class clazz = obj.getClass();
PropertyDescriptor pd = new PropertyDescriptor(filed, clazz);
Method getMethod = pd.getReadMethod();//获得get方法

if (pd != null) {

Object o = getMethod.invoke(obj);//执行get方法返回一个Object
System.out.println(o);

}
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IntrospectionException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
}

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