Question

我正在尝试创建一个应用程序，以使用CrudRepository将数据保存到Oracle数据库中。这是我的资料库：

public interface CustomerRepository extends CrudRepository<Customer, Long> {

    List<Customer> findByEmail(String email);

    List<Customer> findByDate(Date date);

    // custom query example and return a stream
    @Query("select c from Customer c where c.email = :email")
    Stream<Customer> findByEmailReturnStream(@Param("email") String email);

}

我的application.property看起来像：

spring.datasource.url=jdbc:oracle:thin:@vgdevst-scan.hhs.local:1521/EONDEV.hhslocal
spring.datasource.username=EON_USER
spring.datasource.password=EON_USERD
spring.datasource.driver-class-oracle.jdbc.driver.OracleDriver

我的客户实体类别为：

@Entity
public class Customer {

//http://www.oracle.com/technetwork/middleware/ias/id-generation-083058.html
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "CUST_SEQ")
@SequenceGenerator(sequenceName = "customer_seq", initialValue = 1, allocationSize = 1, name = "CUST_SEQ")
Long id;

String name;
String email;

//@Temporal(TemporalType.DATE)
@Column(name = "CREATED_DATE")
Date date;

public Customer(String name, String email, Date date) {
    this.name = name;
    this.email = email;
    this.date = date;
}

public Customer(Long id, String name, String email, Date date) {
    super();
    this.id = id;
    this.name = name;
    this.email = email;
    this.date = date;
}

public Customer() {
}

@Override
public String toString() {
    return "Customer{" +
            "id=" + id +
            ", name='" + name + '\'' +
            ", email='" + email + '\'' +
            ", date=" + date +
            '}';
}

public Long getId() {
    return id;
}

public void setId(Long id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public Date getDate() {
    return date;
}

public void setDate(Date date) {
    this.date = date;
}

我正在尝试使用以下方法将新的用户保存到数据库中

@SpringBootApplication
public class Application implements CommandLineRunner {

    private static final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

    @Autowired
    DataSource dataSource;

    @Autowired
    CustomerRepository customerRepository;

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }

    @Transactional(readOnly = true)
    @Override
    public void run(String... args) throws Exception {

        System.out.println("DATASOURCE = " + dataSource);
        customerRepository.save(new Customer(new Long(4),"Amit","a.r@state.ma.us",new Date()));
        System.out.println("\n1.findAll()...");
        for (Customer customer : customerRepository.findAll()) {
            System.out.println(customer);
        }
    }
}

我看不到在肥皂或数据库中添加的新客户。我在这里想念什么？

Answer 1

您的问题似乎是您在 readOnly 事务中执行save语句。解决方案可能就像删除该属性一样简单。

读取readOnly标志documentation，它指出：

如果事务实际上是只读的，则可以将其设置为true的布尔值标志，从而允许在运行时进行相应的优化。

仅使用@Transactional：

@Transactional
@Override
public void run(String... args) throws Exception {
    // the rest of your code ...
}

Answer 2

代码工作正常。只是在我的应用程序代码中，我已按照旧代码更改了application.property文件，而不是“ appname.datasource.url”，而不是“ spring.datasource.url”，这就是为什么代码从未与DB交互的原因

CrudRepository保存方法未保存到Oracle数据库

2 个答案: