Java反射：根据属性名得到其Set方法设置它的值

来源：互联网发布：淘宝快递单号购买编辑：程序博客网时间：2024/05/22 16:58

设置
A a = new A();
Field field = a.getClass().getDeclaredField("x");
field.setAccessible(true);
field.set(a, 1);
读取
Field f = a.getClass().getDeclaredField("x");
f.setAccessible(true);
System.out.println(f.get(a));

import java.lang.reflect.Field;public class A { private String x = "0"; public static void main(String[] ag) {  A a = new A();  Field field = null;  try  {   field = a.getClass().getDeclaredField("x");   try    {    System.out.println("xiugaiqiandezhi-----------------"      + field.get(a));   }   catch (IllegalArgumentException e)   {    // TODO Auto-generated catch block    e.printStackTrace();   }   catch (IllegalAccessException e)    {    // TODO Auto-generated catch block    e.printStackTrace();   }  }  catch (SecurityException e)   {   // TODO Auto-generated catch block   e.printStackTrace();  }   catch (NoSuchFieldException e)  {   // TODO Auto-generated catch block   e.printStackTrace();  }  field.setAccessible(true);  try   {   field.set((Object) a, "1");  }  catch (IllegalArgumentException e)   {   // TODO Auto-generated catch block   e.printStackTrace();  }   catch (IllegalAccessException e)  {   // TODO Auto-generated catch block   e.printStackTrace();  }  // 读取  Field f = null;  try  {   f = a.getClass().getDeclaredField("x");  }   catch (SecurityException e)  {   // TODO Auto-generated catch block   e.printStackTrace();  }  catch (NoSuchFieldException e)   {   // TODO Auto-generated catch block   e.printStackTrace();  }  f.setAccessible(true);  try  {   System.out.println("xiugaihoudezhi-----------------" + f.get(a));  }   catch (IllegalArgumentException e)   {   // TODO Auto-generated catch block   e.printStackTrace();  }  catch (IllegalAccessException e)  {   // TODO Auto-generated catch block   e.printStackTrace();  } }}输出xiugaiqiandezhi-----------------0xiugaihoudezhi-----------------1