Java Reflection Mechanism Dome

Java Reflection mechanism Public classtesthibernate {@Test Public voidTESTHB () {Try{Class cs= Class.forName ("Testhibernate.test1");//Classload classObject OJ = Cs.newinstance ();//through class new an objectmethod[] Mt = Cs.getmethods ();//Get all methods             for(Method method:mt) {//Polling out all function methods                if(Method.getname () = = "M13") {//judging functions by function nameMethod.invoke (oj,1,2);  for(Class parameter:method.getParameterTypes ()) {//to poll the parameters of a function methodSystem.out.println (Parameter.getname ());//Get parameter type} System.out.println ("Return value" +method.getreturntype ());//Gets the return value type}Else if(Method.getname () = = "M12") {Method.invoke (OJ); //Execute function method without parameter}Else if(Method.getname () = = "Getmeth") {System.out.println ("123" +Method.getreturntype ()); Object Object= Method.invoke (OJ);//gets the class object returned by the function methodClass CCC = Object.getclass ();//obtaining classes from class objectsField ff = Ccc.getfield ("X2");//Get Variable Object                     intX1 = (int) Ff.get (object);//Get Property value//Getdeclaredmethod to get private methodsMethod met = Ccc.getdeclaredmethod ("xxx",Newclass[]{int.class,int.class}); Met.setaccessible (true);//setting can be accessedObject i = Met.invoke (object, x1,2);//calling the Take parameter function methodSystem.out.println (i+ "Xxxxxxxxxxxxxxxxxxxxxxxxxx"); }                            }            } Catch(ClassNotFoundException | instantiationexception | illegalaccessexception | IllegalArgumentException | InvocationTargetException | SecurityException | nosuchmethodexception |nosuchfieldexception e) {            //TODO auto-generated Catch blockE.printstacktrace (); }        }}classtest2{Static{System.out.println ("Classload test2"); }     Public intx2 = 3; Private intxxxintX1,intx2) {        returnX1*x2; }}classtest1{Static{System.out.println ("Classload test1"); } {System.out.println ("New Objcet Tset1"); }         PublicTest2 Getmeth () {return NewTest2 (); }     Public voidM12 () {System.out.println ("M12"); }     PublicString M13 (intBintR) {System.out.println (b+0); returnB+r+ ""; }}

This dome is used for learning tests.

Java Reflection Mechanism

public class Testhibernate {

@Test

public void Testhb () {

try {

Class cs = class.forname ("Testhibernate.test1"); Classload class

Object OJ = Cs.newinstance ();                                                  // through the class new an object

Method [] mt = Cs.getmethods ();                                                  // Get all methods

For (method method:mt) {// poll out all function methods

if (method.getname () = = "M13") {// functions are judged by function name

Method.invoke (oj,1,2);

For (Class parameter:method.getParameterTypes ()) {// Polling The parameters of the function method

System.out.println (Parameter.getname ()); get parameter type

}

System.out.println (" return value " +method.getreturntype ()); Gets the return value type

}else if (method.getname () = = "M12") {

Method.invoke (OJ); Execute function method without parameter

}else if (method.getname () = = "Getmeth") {

System.out.println ("123" +method.getreturntype ());

Object object = Method.invoke (OJ); Gets the class object returned by the function method

Class CCC = Object.getclass (); obtaining classes from class objects

Field ff = Ccc.getfield ("X2"); Get Variable Object

int x1 = (int) ff.get (object); Get Property value

//getdeclaredmethod can get private methods

Method met = Ccc.getdeclaredmethod ("xxx", New Class[]{int.class,int.class});

met.setaccessible (TRUE);// setting can be accessed

Object i = Met.invoke (object, x1,2);// calling the Take parameter function method

System.out.println (i+ "xxxxxxxxxxxxxxxxxxxxxxxxxx");

}

}

} catch (ClassNotFoundException | instantiationexception | illegalaccessexception | IllegalArgumentException | InvocationTargetException | SecurityException | nosuchmethodexception | Nosuchfieldexception e) {

TODO auto-generated Catch block

E.printstacktrace ();

}

}

}

Class test2{

static{

System.out.println ("Classload test2");

}

public int x2 = 3;

private int xxx (int x1,int x2) {

return x1*x2;

}

}

Class test1{

static{

System.out.println ("Classload test1");

}

{

System.out.println ("New Objcet Tset1");

}

Public Test2 Getmeth () {

return new Test2 ();

}

public void M12 () {

System.out.println ("M12");

}

Public String M13 (int b,int r) {

System.out.println (B+R);

return b+r+ "";

}

}

Java Reflection Mechanism Dome