添加运行日志处理，频率为每天对error和info级别的日志进行文件保存

实现判断注册用户名是否已存在

src/main/java/com/fjy/spring/service/UserService.java

@@ -10,6 +10,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.util.List;
+import java.util.Optional;
 
 
 @Service
@@ -23,7 +24,15 @@ public class UserService {
 
 
     public TbUser doLoginService(String name,String password){
-        TbUser user = (TbUser)tbUserRepository.findByColname(name).get();
+        //TbUser user = (TbUser)tbUserRepository.findByColname(name).get();
+        Optional<TbUser> tbUser = tbUserRepository.findByColname(name);
+        TbUser user = new TbUser();
+        if (tbUser.isPresent()){
+             user = (TbUser)tbUser.get();
+        }else {
+            throw new UserException(ResultEnum.EMPTY_DATA);
+        }
+
         if (user!=null){
             if (password.equals(user.getColpassword())){
                 return user;
@@ -53,4 +62,8 @@ public class UserService {
         return vUserinfoRepository.findById(coluserid).get();
     }
 
+    public Optional<TbUser> findByColname(String name){
+        return tbUserRepository.findByColname(name);
+    }
+
 }