- Добавил шифрование паролей в БД.

- Добавил валидацию полей ввода.
https://www.youtube.com/watch?v=AdLXmE4rjy4&list=PLU2ftbIeotGpAYRP9Iv2KLIwK36-o_qYk&index=14

src/main/resources/templates/parts/login.ftl

@@ -3,24 +3,57 @@
         <div class="row mb-3">
             <label class="col-sm-2 col-form-label"> User Name:</label>
             <div class="col-sm-6">
-                <input type="text" class="form-control" name="username" placeholder="User name"/>
+                <input type="text" name="username" value="<#if user??>${user.username}</#if>"
+                       class="form-control ${(usernameError??)?string('is-invalid', '')}"
+                       placeholder="User name"/>
+                <#if usernameError??>
+                    <div class="invalid-feedback">
+                        ${usernameError}
+                    </div>
+                </#if>
             </div>
         </div>
         <div class="row mb-3">
             <label for="inputPassword3" class="col-sm-2 col-form-label"> Password: </label>
             <div class="col-sm-6">
-                <input type="password" class="form-control" name="password" placeholder="Password">
+                <input type="password" name="password"
+                       class="form-control ${(passwordError??)?string('is-invalid', '')}"
+                       placeholder="Password"/>
+                <#if passwordError??>
+                    <div class="invalid-feedback">
+                        ${passwordError}
+                    </div>
+                </#if>
             </div>
         </div>
         <#if isRegistrationForm>
+            <div class="form-group row">
+                <label class="col-sm-2 col-form-label">Password:</label>
+                <div class="col-sm-6">
+                    <input type="password" name="password2"
+                           class="form-control ${(password2Error??)?string('is-invalid', '')}"
+                           placeholder="Confirm password"/>
+                    <#if password2Error??>
+                        <div class="invalid-feedback">
+                            ${password2Error}
+                        </div>
+                    </#if>
+                </div>
+            </div>
             <div class="row mb-3">
                 <label class="col-sm-2 col-form-label"> E-mail:</label>
                 <div class="col-sm-6">
-                    <input type="email" class="form-control" name="email" placeholder="E-mail"/>
+                    <input type="email" name="email" value="<#if user??>${user.email}</#if>"
+                           class="form-control ${(emailError??)?string('is-invalid', '')}"
+                           placeholder="E-m@il"/>
+                    <#if emailError??>
+                        <div class="invalid-feedback">
+                            ${emailError}
+                        </div>
+                    </#if>
                 </div>
             </div>
         </#if>
-
         <#if !isRegistrationForm>
             <a href="/registration" class="btn btn-primary">Add new user</a>
         </#if>