我是Spring-data-cassandra的新手。我的示例代码如下所示：
Customer.java
@Table
public class Customer {
@PrimaryKey
private String id;
private String firstName;
private String lastName;
@CassandraType(type = Name.BIGINT)
private Long age;
protected Customer() {}
public Customer(String id, String firstName, String lastName, Long age) {
this.firstName = firstName;
this.lastName = lastName;
this.id = id;
this.age = age;
}
public String getId() {
return id;
}
public Long getAge() {
return age;
}
public String getFirstName() {
return firstName;
}
public String getLastName() {
return lastName;
}
@Override
public String toString() {
return String.format(
"Customer[id=%s, firstName='%s', lastName='%s', age=%d]",
id, firstName, lastName, age);
}
}
CustomerRepository.java
public interface CustomerRepository extends CrudRepository<Customer, Long> {
@Query("select * from customer where lastname = :lName")
List<Customer> findByLastName(@Param("lName") String lName);
List<Customer> findAll();
}
Application.java
@SpringBootApplication
public class Application implements CommandLineRunner {
@Autowired
CustomerRepository repository;
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
@Override
public void run(String... strings) throws Exception {
repository.save(new Customer("0", "Jack", "Bauer", 20L));
repository.save(new Customer("1", "Chloe", "O'Brian", 21L));
repository.save(new Customer("2", "Kim", "Bauer", 22L));
repository.save(new Customer("3", "David", "Palmer", 23L));
repository.save(new Customer("4", "Michelle", "Dessler", 24L));
// fetch all customers
System.out.println("Customers found with findAll():");
System.out.println("-------------------------------");
for (Customer customer : repository.findAll()) {
System.out.println(customer);
}
// fetch customers by last name
System.out.println("Customer found with findByLastName('Bauer'):");
System.out.println("--------------------------------------------");
for (Customer bauer : repository.findByLastName("Bauer")) {
System.out.println(bauer);
}
System.out.println("Done.");
}
}
的pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>mine.samples</groupId>
<artifactId>spring-data-cassandra-test</artifactId>
<version>0.1.0</version>
<packaging>jar</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.5.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-cassandra</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>javax.transaction-api</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
当我尝试运行代码时出现以下异常：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'application': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: mine.samples.CustomerRepository mine.samples.Application.repository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': Invocation of init method failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: declarative query methods are a todo
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at mine.samples.Application.main(Application.java:15)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: mine.samples.CustomerRepository mine.samples.Application.repository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': Invocation of init method failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: declarative query methods are a todo
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
... 16 common frames omitted
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customerRepository': Invocation of init method failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: declarative query methods are a todo
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
... 18 common frames omitted
Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: declarative query methods are a todo
at org.springframework.data.cassandra.repository.support.CassandraRepositoryFactory$CassandraQueryLookupStrategy.resolveQuery(CassandraRepositoryFactory.java:115)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:369)
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:192)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:239)
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:225)
at org.springframework.data.cassandra.repository.support.CassandraRepositoryFactoryBean.afterPropertiesSet(CassandraRepositoryFactoryBean.java:62)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
... 28 common frames omitted
例外的要点是“声明性查询方法是一个待办事项”。文档对于什么是不支持的内容有点不清楚。有人能说清楚这个吗？感谢。
答案 0 :(得分：5)
我在@Query导入了错误的CustomerRepository.java。我通过将导入更改为：
import org.springframework.data.cassandra.repository.Query;