JAVA Dynamic Proxy (Interceptor) __java

This instance is an impersonation security check

The proxy object interface defines Java code public interface Usermanager {public void Aaduser (user user);       public void Deletebyid (int id);       public void UpdateUser (user user);   Public User FindByID (int id); }

Implement Java code    public class usermanagerimp implements usermanager {  by proxy object interface        @Override        public void aaduser (User  user)  {           system.out.println ("---------- AddUser------------");       }        @Override         public void deletebyid (int id)  {            system.out.println ("----------Deletebyid------------");        }        @Override        public  user findbyid (int id)  {            System.out.println ("----------FindByID------------");            return null;       }        @Override         public void updateuser (user user)  {            system.out.println ("----------updateuser------------");        }  }  

 

  Define a User object Java code    public class user {        private int id;       private String name;        private int age;       public String  GetName ()  {           return name;       }       public void setname (String name)  {           this.name = name;       }       public int getage ()  {           return age;       }        public void setage (int age)  {            this.age = age;       }        Public int getid ()  {           return id;        }       public void setid (int  ID)  {           this.id = id;       }  }  

 

  Inherit Invocationhandler interface Java code    package hb.proxy;      import  java.lang.reflect.invocationhandler;   import java.lang.reflect.method;   import  java.lang.reflect.proxy;     /*   * 1, dynamic proxy class must implement Invocationhandler interface, To implement the Invoke () method    */   public class securityhandler implements  invocationhandler {       private Object targetObject;       /*       *  The following method is to get the proxy object, if not the proxy object, this effect is not useful        *  the last parameter is the Invocationhandler interface, which is why the dynamic proxy object must implement this interface         *  The resulting proxy object executes the Invoke () method        */        public object newproxy (object targetobject) {            this.targetobject = targetobject;