Java reflection implements the same property value replication for different objects

1. This method will filter the final field

2. This method filters the object fields

3. This method is compatible with the replication of attribute values between objects and between different objects

Package Com.bin.design.util;import Java.lang.reflect.field;import java.lang.reflect.method;import Java.lang.reflect.modifier;import Java.util.arrays;import Java.util.list;import com.bin.design.domain.People; Import Com.bin.design.domain.User; Public classTools {/** * Object Same Property copy * * @param obj * @param toresult * @return * @throws Exception * Conversion Error*/     Public Static<T> T cloneobj (Object obj, class<t>Toresult) {        if(obj = =NULL) {            return NULL; }        Try{T T=toresult.newinstance (); Field[] Fields=Toresult.getdeclaredfields ();  for(Field field:fields) {field.setaccessible (true);//Modify access Permissions                if(Modifier.isfinal (Field.getmodifiers ()))Continue; if(Iswraptype (field)) {String Firstletter= Field.getname (). SUBSTRING (0,1). toUpperCase ();//Capitalize first letterString Getmethodname ="Get"+ Firstletter + field.getname (). SUBSTRING (1); String Setmethodname="Set"+ Firstletter + field.getname (). SUBSTRING (1); Method GetMethod= Obj.getclass (). GetMethod (Getmethodname);//getting a Get method from a source objectMethod Setmethod = Toresult.getmethod (Setmethodname,NewClass[] {field.gettype ()});//Get Set method from target object//if both the get and set methods are fetched from an object, an object that appears as an instance of declaring class error//like:user{name} people{name}//because if obtained from the source object, when the Setmethod.invoke call, although the name is the same, due to the different classes, cause//the method being called is not the proper method in the target object.                    The actual is: GetMethod = Com.package.User.getName (); setmethod = Com.package.User.setName (); //The result of the Setmethod.invoke call becomes people.setname () = = people. (Com.package.User.setName ())//SetName Here is not people should have, so error//Similarly, if fetched from the target object, there will be an error when the Getmethod.invoke is called. //Therefore, the acquisition of GetMethod and Setmethod should be treated differently depending on the source object and the target object. //of course, if you just make a separate copy of the object, you don't have to worry about calling a method that doesn't belong to itself, and you don't have to differentiate between object get and setObject Value= Getmethod.invoke (obj);//Get Gets the value of the source objectSetmethod.invoke (T,NewObject[] {value});//set is the value of the target object                }            }            returnT; } Catch(Exception e) {System. out. println (E.getmessage ());        E.printstacktrace (); }        return NULL; }    /** * is the base type, package type, String type*/    Private Staticboolean iswraptype (Field field) {string[] types= {"Java.lang.Integer","java.lang.Double","java.lang.Float","Java.lang.Long",                "Java.lang.Short","Java.lang.Byte","Java.lang.Boolean","Java.lang.Char","java.lang.String","int",                "Double","Long"," Short","byte","Boolean","Char","float" }; List<String> typelist =arrays.aslist (types); returnTypelist.contains (Field.gettype (). GetName ())?true:false; }         Public Static voidMain (string[] args) {User User=NewUser (); User.setname ("AAA"); User.setpassword ("VVV"); System. out. println ("1"+user.getname () +User.getpassword ()); People people=Newpeople (); System. out. println ("2"+people.getname ()); User Users= Cloneobj (User,user.class); System. out. println ("3"+users.getname ()); People p= Cloneobj (user,people.class); System. out. println ("4"+p.getname ()); }}

Java reflection implements the same property value replication for different objects