How can I config a application to handle saml request

Hello team
I generate a saml request in java code, like https://dev-530379.oktapreview.com/app/Talend_OIDC_Intergration/0oa1oknhlgwBequ550h8/sso/saml?SAMLRequest=nVNNj9MwFPwrke9pPhrY1Goqla4QlRYIbeDABbnOS2vJsYPfy2759zjZ7G6RoNJytScz45nJEkWr046vezqZHfzsASlYI4IjZc3GGuxbcHtw90rC191dwU5EHY8ibaXQJ4vE8ziPI%2BuOMxIaTD0TdauMQnKCrIsQrbZHZVjw3joJo07BGqERWLC9LdiPJAOZL5Kb8AayOMzkoglFlmXhPM3iw2GeJ%2FGi9lAsBaK6h5ePEXvYGiRhqGBpnM7D%2BE2Y5lUy50nOk7cz7%2Bw7C0pnyUqr3ylTK3MsWO8MtwIVciNaQE6S79cf73g6i%2FnhEYT8Q1WVYfl5X7HgGzj0YXiNWcyCc6sN8sfYrnN1kzBbLUc4Hx27S4brBOKpB7Z6ZeoOWksw1RYto0v9yU3HP3nB7W1ptZK%2FgrXW9mHjQJBPmFwPY2GtoOsWhxNVh80I5d2QFBIYYsG%2BHPi%2F9EKrRoF79XD%2BfAKLnm1PK4V63JKfKMGZgo1tO%2BEUDj3BWUh6Tv0SttE%2B0x00%2F9XBVZjkcuD2x8NOH6yrh92B9D4rJwx21tFTD39ztJou%2F%2FG%2Bl%2BvLP3X1Gw%3D%3D&RelayState=48a7ece9-72e0-41f7-8f95-1f6fc38755dc

I got error 404, could you provide a example show me, what kind of application I should use, and how to config for visit?