我正在使用Spring MVC创建一个网站,并且为了持久性,我将Spring Data JPA与Hibernate
4用作我的JPA提供程序。目前正在使用Hibernate
Validator处理验证。我有一个问题,我的验证程序被两次调用,我不知道为什么。这是一个问题的主要原因是因为第二轮未将依赖项自动关联到验证器中,并且出现了空指针异常。以下是导致失败的调用顺序:
任何人都可以阐明为什么两次调用验证程序,特别是为什么要跳过“ userRepository.save(user);”行吗?回到这些验证器?
非常感谢
这是我的user.java类
package com.dating.domain;
import java.util.HashSet;
import java.util.Set;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.PrePersist;
import javax.persistence.PreUpdate;
import javax.persistence.Table;
import javax.persistence.Transient;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
import org.hibernate.annotations.Type;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotEmpty;
import org.joda.time.LocalDate;
import org.springframework.format.annotation.DateTimeFormat;
import com.dating.annotation.NotDefaultSelect;
import com.dating.annotation.UniqueUsername;
@Entity
@Table(name = "dating.user")
public class User {
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "username", unique = true)
@NotEmpty
@Pattern(regexp = "^[a-zA-Z0-9]*$")
@UniqueUsername
private String username;
@Column(name = "password", nullable = false)
@NotEmpty
@Size(min = 8)
private String password;
@Column(name = "first_name", nullable = false)
@NotEmpty
private String firstName;
@Column(name = "last_name", nullable = false)
@NotEmpty
private String lastName;
@Transient
private String fullName;
@Column(name = "email", nullable = false)
@NotEmpty
@Email
private String email;
@Column(name = "gender", nullable = false)
@NotEmpty
private String gender;
@Column(name = "date_of_birth", nullable = false)
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDate")
@DateTimeFormat(pattern = "dd/MM/yyyy")
private LocalDate dateOfBirth;
@Column(name = "join_date", nullable = false)
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDate")
private LocalDate joinDate;
@Column(name = "where_did_you_hear_about_us", nullable = false)
@NotDefaultSelect
private String whereDidYouHearAboutUs;
@Column(name = "enabled")
private boolean enabled;
@ManyToMany(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
@JoinTable(name = "dating.user_roles", joinColumns = { @JoinColumn(name = "user_id", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "role_id", nullable = false, updatable = false) })
private Set<Role> roles = new HashSet<Role>();
@Column(name = "created_time", nullable = false)
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDate")
private LocalDate createdTime;
@Column(name = "modification_time", nullable = false)
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDate")
private LocalDate modificationTime;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFullName() {
return firstName + " " + lastName;
}
public void setFullName(String fullName) {
this.fullName = fullName;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public LocalDate getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(LocalDate dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
public LocalDate getJoinDate() {
return joinDate;
}
public void setJoinDate(LocalDate joinDate) {
this.joinDate = joinDate;
}
public String getWhereDidYouHearAboutUs() {
return whereDidYouHearAboutUs;
}
public void setWhereDidYouHearAboutUs(String whereDidYouHearAboutUs) {
this.whereDidYouHearAboutUs = whereDidYouHearAboutUs;
}
public boolean isEnabled() {
return enabled;
}
public void setEnabled(boolean enabled) {
this.enabled = enabled;
}
public Set<Role> getRoles() {
return roles;
}
public void setRoles(Set<Role> roles) {
this.roles = roles;
}
public void addRole(Role role) {
roles.add(role);
}
public LocalDate getCreatedTime() {
return createdTime;
}
public void setCreatedTime(LocalDate createdTime) {
this.createdTime = createdTime;
}
public LocalDate getModificationTime() {
return modificationTime;
}
public void setModificationTime(LocalDate modificationTime) {
this.modificationTime = modificationTime;
}
@PreUpdate
public void preUpdate() {
modificationTime = new LocalDate();
}
@PrePersist
public void prePersist() {
LocalDate now = new LocalDate();
createdTime = now;
modificationTime = now;
}
}
我的注册控制器中的相关方法:
@RequestMapping(value = "/register", method = RequestMethod.POST)
public String addUserFromForm(@Valid User user,
BindingResult bindingResult, RedirectAttributes ra) {
if (bindingResult.hasErrors()) {
return "user/register";
}
userService.addUser(user);
// Redirecting to avoid duplicate submission of the form
return "redirect:/user/" + user.getUsername();
}
我的服务等级:
package com.dating.service.impl;
import javax.transaction.Transactional;
import org.joda.time.LocalDate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;
import com.dating.domain.Role;
import com.dating.domain.User;
import com.dating.repository.RoleRepository;
import com.dating.repository.UserRepository;
import com.dating.repository.specification.UserSpecifications;
import com.dating.service.UserService;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserRepository userRepository;
@Autowired
private RoleRepository roleRepository;
@Transactional
@Override
public void addUser(User user) {
user.setJoinDate(new LocalDate());
user.setEnabled(true);
Role role = roleRepository.findByName(Role.MEMBER);
if (role == null) {
role = new Role();
role.setName(Role.MEMBER);
}
user.addRole(role);
BCryptPasswordEncoder encoder = new BCryptPasswordEncoder();
user.setPassword(encoder.encode(user.getPassword()));
userRepository.save(user);
System.out.println("User Saved");
}
@Override
public User getUserByUsername(String username) {
return userRepository.findByUsername(username);
}
@Override
public Iterable<User> getAllUsers() {
return userRepository.findAll();
}
@Override
public void updateDetails(User user) {
userRepository.save(user);
}
@Override
public Iterable<User> lastNameIsLike(String searchTerm) {
return userRepository.findAll(UserSpecifications
.lastNameIsLike(searchTerm));
}
}
我的NotDefaultSelect验证器:
package com.dating.validator;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import com.dating.annotation.NotDefaultSelect;
public class NotDefaultSelectValidator implements
ConstraintValidator<NotDefaultSelect, String> {
@Override
public void initialize(NotDefaultSelect constraint) {
}
@Override
public boolean isValid(String selectedValue, ConstraintValidatorContext ctx) {
if (selectedValue == null) {
return false;
}
if (selectedValue.equals("") || selectedValue.equals("0")
|| selectedValue.equalsIgnoreCase("default")
|| selectedValue.equalsIgnoreCase("please select")) {
return false;
}
return true;
}
}
我的uniqueUsername验证器:
package com.dating.validator;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import org.springframework.beans.factory.annotation.Autowired;
import com.dating.annotation.UniqueUsername;
import com.dating.repository.UserRepository;
public class UniqueUsernameValidator implements
ConstraintValidator<UniqueUsername, String> {
@Autowired
private UserRepository userRepository;
@Override
public void initialize(UniqueUsername constraint) {
}
@Override
public boolean isValid(String username, ConstraintValidatorContext ctx) {
if (username == null || userRepository.findByUsername(username) == null) {
return true;
}
return false;
}
}
我的用户资料库:
package com.dating.repository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
import org.springframework.data.repository.CrudRepository;
import com.dating.domain.User;
//Spring Data JPA Marker interfaces being extended for automatic CRUD repository creation
public interface UserRepository extends CrudRepository<User, Long>, JpaSpecificationExecutor<User> {
//Automatic query creation from method name
public User findByUsername(String username);
}
最后是我的persistence-context.xml文件
<!-- Data source properties -->
<util:properties id="dataSourceSettings" location="classpath:datasource.properties" />
<!-- Pooled data source using BoneCP -->
<bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource"
destroy-method="close">
<property name="driverClass" value="#{dataSourceSettings['jdbc.driverClass']}" />
<property name="jdbcUrl" value="#{dataSourceSettings['jdbc.url']}" />
<property name="username" value="#{dataSourceSettings['jdbc.username']}" />
<property name="password" value="#{dataSourceSettings['jdbc.password']}" />
<property name="idleConnectionTestPeriodInMinutes" value="60" />
<property name="idleMaxAgeInMinutes" value="240" />
<property name="maxConnectionsPerPartition" value="30" />
<property name="minConnectionsPerPartition" value="10" />
<property name="partitionCount" value="3" />
<property name="acquireIncrement" value="5" />
<property name="statementsCacheSize" value="100" />
<property name="releaseHelperThreads" value="3" />
</bean>
<!-- JPA entity manager factory bean -->
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.dating.domain" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" />
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.dialect">#{dataSourceSettings['hibernate.dialect']}</prop>
<prop key="hibernate.hbm2ddl.auto">#{dataSourceSettings['hibernate.hbm2ddl.auto']}
</prop>
<prop key="hibernate.show_sql">#{dataSourceSettings['hibernate.show_sql']}</prop>
<prop key="hibernate.format_sql">#{dataSourceSettings['hibernate.format_sql']}</prop>
<prop key="hibernate.use_sql_comments">#{dataSourceSettings['hibernate.use_sql_comments']}
</prop>
</props>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<context:annotation-config />
<jpa:repositories base-package="com.dating.repository"/>
当您将bean发送到数据存储区时,也许第二次验证是由休眠完成的。要关闭它,请将其添加到您的persistence.xml中:
<property name="javax.persistence.validation.mode" value="none"/>
https://docs.jboss.org/hibernate/entitymanager/3.5/reference/en/html/configuration.html说:
默认情况下,Bean验证(和休眠验证器)被激活。创建,更新(和可选地删除)实体后,在将其发送到数据库之前先对其进行验证。Hibernate生成的数据库模式还反映了在实体上声明的约束。
您可以根据需要进行微调:
自动:如果在类路径中存在Bean验证,则激活CALLBACK和DDL。
回调:实体在创建,更新和删除时均经过验证。如果不存在Bean验证提供程序,则在初始化时引发异常。
DDL :(不是标准的,请参见下文)数据库架构是在创建,更新和删除时经过验证的实体。如果不存在Bean验证提供程序,则在初始化时引发异常。
无:完全不使用Bean验证
由于@Valid批注,第一个显然是由您的Spring控制器完成的。
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