/AddUserController.java

## AddUserController.java
package eu.shishigami.school.web.controller.admin.user;

@Component
@Scope(value = "session")
@Slf4j
public class AddUserController {

	@Autowired
	private AddUserView addUserView;

	@Autowired
	private UserService userService;

	@Autowired
	private GroupService groupService;

	@PostConstruct
	public void init() {
		addUserView.setUserEntity(new UserEntity());
		addUserView.setAllGroups(groupService.findAll());
		LoggingUtil.logInitialization(log);
	}

	public void handleSave() {
		// BCrypt password encoding..

		addUserView.setUserEntity(userService.save(addUserView.getUserEntity()));

		LoggingUtil.logSave(log);
	}

}

## addUserDialog.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:f="http://java.sun.com/jsf/core" xmlns:p="http://primefaces.org/ui"
	xmlns:h="http://java.sun.com/jsf/html">
<body>
	<ui:composition>
		<f:event listener="#{addUserController.init}" type="preRenderView" />

		<h:form id="addUserForm">
			<p:inputText value="#{addUserView.userEntity.username}" id="usernameInput" placeholder="Username" />

			<p:password value="#{addUserView.password}" id="passwordInput" placeholder="Password" />

			<h:selectOneMenu value="#{addUserView.userEntity.group}" id="groupInput" converter="#{groupConverter}">
				<f:selectItem itemValue="#{null}" itemLabel="None" />
				<f:selectItems  value="#{addUserView.allGroups}" var="group" itemValue="#{group}" itemLabel="#{group.groupName}" />
			</h:selectOneMenu>

			<!-- Mehr input Felder für andere Attribute.. -->
			<p:commandButton actionListener="#{addUserController.handleSave}" oncomplete="if (!args.validationFailed) PF('addUserDlg').hide();" value="Save" update=":userAdminForm" />
		</h:form>
	</ui:composition>
</body>
</html>

## AddUserView.java
package eu.shishigami.school.web.controller.admin.user;

@Component
@Scope(value = "session")
@Getter
@Setter
public class AddUserView {

	private List<GroupEntity> allGroups;

	private UserEntity userEntity;

	private String password;

}

## GroupEntity.java
package eu.shishigami.school.domain;

@Entity
@Getter
@Setter
public class GroupEntity {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;

	@Column(unique = true)
	@NotBlank
	private String groupName;

	@OneToMany(cascade = CascadeType.ALL, mappedBy = "group")
	@LazyCollection(LazyCollectionOption.FALSE)
	private List<UserEntity> users = new ArrayList<UserEntity>();

	@OneToMany(cascade = CascadeType.ALL)
	@LazyCollection(LazyCollectionOption.FALSE)
	private List<RoleEntity> roles = new ArrayList<RoleEntity>();

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		GroupEntity other = (GroupEntity) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}

}

## RoleEntity.java
package eu.shishigami.school.domain;

@Entity
@Getter
@Setter
public class RoleEntity {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;

	@Column(unique = true)
	@NotBlank
	private String roleName;

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		RoleEntity other = (RoleEntity) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}

}

## UserEntity.java
package eu.shishigami.school.domain;

@Entity
@Getter
@Setter
public class UserEntity {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;

	@Column(unique = true)
	@NotBlank
	@Length(min = 4, max = 16)
	private String username;

	@NotBlank
	@Length(min = 4, max = 128)
	private String password;

	@Email
	@NotBlank
	private String email;

	@NotBlank
	private String firstName;

	@NotBlank
	private String lastName;

	private boolean enabled = true;

	@ManyToOne(cascade = CascadeType.ALL)
	@JoinColumn(name = "group_id")
	private GroupEntity group;

	@Transient
	public boolean hasRole(String roleName) {
		for (RoleEntity role : group.getRoles()) {
			if (role.getRoleName().equals(roleName)) {
				return true;
			}
		}

		return false;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		UserEntity other = (UserEntity) obj;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		return true;
	}

}

## UserRepository.java
package eu.shishigami.school.repository;

@Repository
public interface UserRepository extends JpaRepository<UserEntity, Long> {

	public UserEntity findByUsername(String username);

}

## UserService.java
package eu.shishigami.school.service;

@Service
public class UserService {

	@Autowired
	private UserRepository userRepository;

	@Transactional(readOnly = false)
	public void delete(final UserEntity userEntity) {
		userRepository.delete(userEntity);
	}

	@Transactional(readOnly = false)
	public UserEntity save(final UserEntity userEntity) {
		return userRepository.save(userEntity);
	}

	public UserEntity findByUsername(final String username) {
		return userRepository.findByUsername(username);
	}

	public UserEntity findOne(final Long id) {
		return userRepository.findOne(id);
	}

	public List<UserEntity> findAll() {
		return userRepository.findAll();
	}

}
	package eu.shishigami.school.web.controller.admin.user;

	@Component
	@Scope(value = "session")
	@Slf4j
	public class AddUserController {

	@Autowired
	private AddUserView addUserView;

	@Autowired
	private UserService userService;

	@Autowired
	private GroupService groupService;

	@PostConstruct
	public void init() {
	addUserView.setUserEntity(new UserEntity());
	addUserView.setAllGroups(groupService.findAll());
	LoggingUtil.logInitialization(log);
	}

	public void handleSave() {
	// BCrypt password encoding..

	addUserView.setUserEntity(userService.save(addUserView.getUserEntity()));

	LoggingUtil.logSave(log);
	}

	}
	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:f="http://java.sun.com/jsf/core" xmlns:p="http://primefaces.org/ui"
	xmlns:h="http://java.sun.com/jsf/html">
	<body>
	<ui:composition>
	<f:event listener="#{addUserController.init}" type="preRenderView" />

	<h:form id="addUserForm">
	<p:inputText value="#{addUserView.userEntity.username}" id="usernameInput" placeholder="Username" />

	<p:password value="#{addUserView.password}" id="passwordInput" placeholder="Password" />

	<h:selectOneMenu value="#{addUserView.userEntity.group}" id="groupInput" converter="#{groupConverter}">
	<f:selectItem itemValue="#{null}" itemLabel="None" />
	<f:selectItems value="#{addUserView.allGroups}" var="group" itemValue="#{group}" itemLabel="#{group.groupName}" />
	</h:selectOneMenu>

	<!-- Mehr input Felder für andere Attribute.. -->
	<p:commandButton actionListener="#{addUserController.handleSave}" oncomplete="if (!args.validationFailed) PF('addUserDlg').hide();" value="Save" update=":userAdminForm" />
	</h:form>
	</ui:composition>
	</body>
	</html>
	package eu.shishigami.school.domain;

	@Entity
	@Getter
	@Setter
	public class GroupEntity {

	@Id
	@GeneratedValue(strategy = GenerationType.IDENTITY)
	private Long id;

	@Column(unique = true)
	@NotBlank
	private String groupName;

	@OneToMany(cascade = CascadeType.ALL, mappedBy = "group")
	@LazyCollection(LazyCollectionOption.FALSE)
	private List<UserEntity> users = new ArrayList<UserEntity>();

	@OneToMany(cascade = CascadeType.ALL)
	@LazyCollection(LazyCollectionOption.FALSE)
	private List<RoleEntity> roles = new ArrayList<RoleEntity>();

	@Override
	public int hashCode() {
	final int prime = 31;
	int result = 1;
	result = prime * result + ((id == null) ? 0 : id.hashCode());
	return result;
	}

	@Override
	public boolean equals(Object obj) {
	if (this == obj)
	return true;
	if (obj == null)
	return false;
	if (getClass() != obj.getClass())
	return false;
	GroupEntity other = (GroupEntity) obj;
	if (id == null) {
	if (other.id != null)
	return false;
	} else if (!id.equals(other.id))
	return false;
	return true;
	}

	}
	package eu.shishigami.school.repository;

	@Repository
	public interface UserRepository extends JpaRepository<UserEntity, Long> {

	public UserEntity findByUsername(String username);

	}
	package eu.shishigami.school.service;

	@Service
	public class UserService {

	@Autowired
	private UserRepository userRepository;

	@Transactional(readOnly = false)
	public void delete(final UserEntity userEntity) {
	userRepository.delete(userEntity);
	}

	@Transactional(readOnly = false)
	public UserEntity save(final UserEntity userEntity) {
	return userRepository.save(userEntity);
	}

	public UserEntity findByUsername(final String username) {
	return userRepository.findByUsername(username);
	}

	public UserEntity findOne(final Long id) {
	return userRepository.findOne(id);
	}

	public List<UserEntity> findAll() {
	return userRepository.findAll();
	}

	}