for (User u: list) { if (u.getRole().equalsIgnoreCase("recruiter")) { //sysout if (u.getUserName().equalsIgnoreCase(userName) && u.getPassword().equalsIgnoreCase(password)) //2 sysout return u; } break; //here break statement will exit your loop just after first Iteration. }因此，请尝试此代码。
for (User u: list) { if (u.getRole().equalsIgnoreCase("recruiter")) { //sysout if (u.getUserName().equalsIgnoreCase(userName) && u.getPassword().equalsIgnoreCase(password)){ //2 sysout return u; } else{ //your pre if password doesnot matched } // continue even if more than one recruiter type User Object are in Database. }else{ //your pre if user Role doesnot matched } } //loop will check all element present in that array. and if it's ROLE is matched like "Recuriter" then it will check user and password.
