我试图创建自定义注释来检查唯一的字段值。例如,检查唯一的电子邮件地址等。
但无法自动关联“customerDAO”对象。它抛出异常组织。springframework。网状物util。NestedServletException:请求处理失败;嵌套的异常是javax。验证。ValidationException:isValid调用期间发生意外异常。
我在哪里犯错?请建议。
顾客JAVA
@Entity
@Component
public class Customer {
@Id
@GeneratedValue
int id;
@Unique(value = Customer.class, property = "emailAddress")
String emailAddress;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getEmailAddress() {
return emailAddress;
}
public void setEmailAddress(String emailAddress) {
this.emailAddress = emailAddress;
}
}
唯一的JAVA
@Target({ElementType.FIELD, ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Constraint(validatedBy = UniqueConstraintValidator.class)
@Documented
public @interface Unique {
String message() default "{Not Unique}";
Class<?>[] groups() default {};
Class<? extends Payload>[] payload() default {};
String property() default "id";
Class<?> value();
}
UniqueConstraintValidator.java
public class UniqueConstraintValidator implements ConstraintValidator<Unique, String> {
Class<?> aClass;
String fieldName;
Unique unique;
@Autowired
CustomerDAO customerDAO;
@Override
public void initialize(Unique unique) {
SpringBeanAutowiringSupport.processInjectionBasedOnCurrentContext(this);
System.out.println(unique.property());
System.out.println(unique.value());
aClass = unique.value();
this.unique = unique;
fieldName = unique.property();
}
@Override
@Transactional
public boolean isValid(String s, ConstraintValidatorContext constraintValidatorContext) {
System.out.print("Valid :: ");
List<Customer> customerList = customerDAO.findByEmailAddress(s);
if(customerList!=null && customerList.size()>0){
constraintValidatorContext.disableDefaultConstraintViolation();
constraintValidatorContext.buildConstraintViolationWithTemplate("Please enter unique email address.").addConstraintViolation();
return false;
}
else
return true;
}
}
自定义DAO. java
public interface CustomerDAO {
public void save(Customer customer);
public Customer get(int id);
public List<Customer> list();
public void update(Customer customer);
public void delete(int id);
public List<Customer> findByEmailAddress(String emailAddress);
}
CustomerDAOImpl。JAVA
@Repository("customerDAO")
@Transactional(propagation = Propagation.REQUIRED)
public class CustomerDAOImpl implements CustomerDAO {
@Autowired
private SessionFactory sessionFactory;
@Autowired
HibernateTransactionManager txManager;
private Session getCurrentSession(){
return sessionFactory.getCurrentSession();
}
@Override
public void save(Customer customer) {
sessionFactory.getCurrentSession().save(customer);
}
@Override
public Customer get(int id) {
return null;
}
@Override
public List<Customer> list() {
return getCurrentSession().createCriteria(Customer.class).list();
}
@Override
public void update(Customer customer) {
}
@Override
public void delete(int id) {
}
@Override
public List<Customer> findByEmailAddress(String emailAddress) {
return getCurrentSession().createCriteria(Customer.class).add(Restrictions.eq("emailAddress",emailAddress)).list();
}
}
mvc调度器servlet。xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<context:annotation-config />
<context:component-scan base-package="com.springapp.mvc" />
<mvc:annotation-driven />
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/springdemo"/>
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean" >
<property name="dataSource" ref="dataSource"/>
<!--<property name="packagesToScan" value="com.springapp.mvc.model" />-->
<property name="annotatedClasses">
<list>
<value>com.springapp.mvc.model.Customer</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.hbm2ddl.auto">create-drop</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="current_session_context_class">thread</prop>
</props>
</property>
</bean>
<bean id="txManger" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<tx:annotation-driven transaction-manager="txManger" />
<bean id="persistenceExceptionTranslationPostProcessor"
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" />
</beans>
波姆。xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.springapp</groupId>
<artifactId>SpringDemo</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>SpringDemo</name>
<properties>
<spring.version>3.2.0.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<!-- Spring AOP dependency -->
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2</version>
</dependency>
<!-- MySQL database driver -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.16</version>
</dependency>
<!-- Hibernate framework -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.18.0-GA</version>
</dependency>
<dependency>
<groupId>org.hibernate.common</groupId>
<artifactId>hibernate-commons-annotations</artifactId>
<version>4.0.1.Final</version>
<classifier>tests</classifier>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.2.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.0-api</artifactId>
<version>1.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.0.1.Final</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-dbcp</artifactId>
<version>7.0.41</version>
</dependency>
</dependencies>
<build>
<finalName>SpringDemo</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<includes>
<include>**/*Tests.java</include>
</includes>
</configuration>
</plugin>
</plugins>
</build>
</project>
您应该检查以下问题:Autowired Repository在Custom Constraint Validator中为空
你似乎也有同样的问题。您需要采取更多步骤使验证器成为Springbean并自动连接依赖项
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