Internal Server Error, The server encountered an unexpected condition that prevented it from fulfilling the request

Question

hi everyone i am getting error 500 i don't know how to get rid of these error so i will be happy if you help me to get out of this error and thanks to you in advance

here is my index.jsp file and on leftside my mavenproject is visible this is my web.xml file and i have created A class called Alien and i have created AlienResource class and code as follows by image and this is myResource class

here is my pom.xml file (3) and if i run the code using based on alienresource class it is coming like this please help me.

i tried to solve it but i ended up not getting output soo please help me