find position of variable from message template and extract value of it

1st Example - With simple text this is template Your transaction of <amount> Rs is successfully sent to <user> Your account balance is <finalBalance> Rs Actual Message is Your transaction of 50 Rs is successfully sent to rajdeep kumar Your account balance is 20 Rs -------------------------------------------- 2nd Example - With json output Template {"data":{"amount":"<amount>","name":"<name>","finalBalance":"<finalBalance>"}} Actual Message {"data":{"amount":"50","name":"Rajdeep Kumar","finalBalance":"20"}} 3nd Example - With xml output <!--?xml version="1.0" encoding="UTF-8"?--> <data> <amount><amount></amount> <name><name></name> <finalBalance><finalBalance></finalBalance> </data> Actual Message <!--?xml version="1.0" encoding="UTF-8"?--> <data> <amount>50</amount> <name>Rajdeep Kumar</name> <finalBalance>20</finalBalance> </data> I want to find position of variable and extract value of variable . Here variable is <amount> , <name> and <finalBalance> Just treat all example as string only. Please do not use any xml or json decoding method , Just do a single coding which will apply in all type of string and find variable.