Jdk 1.8.0_82、Springboot 1.3.8 和 JPA。
我想插入由现有对象值组成的新行。
我只是打电话
List<LogSchemaFieldModel> newFields = Lists.newArrayList();
for(LogSchemaFieldModel f : fields){
newFields.add(new LogSchemaFieldModel(){{
setFieldName( f.getFieldName() );
setFieldType( f.getFieldType() );
setFieldOpt( Field.Mode.NULLABLE.toString() );
setDescription( f.getDescription() );
setSampleValue( f.getSampleValue() );
setCommon(true);
setRequired(null);
}});
}
repo.save(newFields);
但它抛出了这个异常。
org.springframework.dao.InvalidDataAccessApiUsageException: Unknown entity: com......service.LogDefineService$6; nested exception is java.lang.IllegalArgumentException: Unknown entity: com......service.LogDefineService$6
at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:384) ~[spring-orm-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:227) ~[spring-orm-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:436) ~[spring-orm-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59) ~[spring-tx-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213) ~[spring-tx-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147) ~[spring-tx-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:131) ~[spring-data-jpa-1.9.5.RELEASE.jar:na]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-4.2.8.RELEASE.jar:4.2.8.RELEASE]
at …我正在尝试通过 BaseRepository 接口和 BaseRepositoryImpl 扩展 **SimpleJpaRepository **。
\nTha BaseRepositoryImpl 扩展 **SimpleJpaRepository ** 并实现 BaseRepository。
此外，我还有一些其他存储库，例如扩展了 BaseRepository 的 CandidateRepository 和 EmployeeRepository。
\n\n下面您可以看到错误后的代码：
\n\n\n\n
@NoRepositoryBean \n public interface BaseRepository<T, ID extends Serializable> extends JpaRepository<T, ID>{\n//..\n}\n\n\n@Repository\npublic abstract class BaseRepositoryImpl<T, ID extends Serializable> extends \n SimpleJpaRepository<T, ID> implements BaseRepository<T, ID>{\n\n private final EntityManager em;\n\n public BaseRepositoryImpl(JpaEntityInformation<T,ID> entityInformation, \n EntityManager entityManager) {\n\n super(entityInformation, entityManager);\n this.em = entityManager;\n\n }\n //..\n}\n扩展存储库：
\n\n@NoRepositoryBean\n public interface CandidateRepository extends BaseRepository<DatCandidate, UUID>{\n\n //..\n }\n\n\n@Repository(value="CandidateRepositoryImpl")\npublic …在我的 Spring Boot 应用程序中，我尝试配置 H2 数据库文件夹的路径。我想通过以下路径放置它：
/home/public/h2
配置如：
# Datasource
spring.datasource.url=jdbc:h2:file:/home/public/h2
spring.datasource.username=sa
spring.datasource.password=
spring.datasource.driver-class-name=org.h2.Driver
导致以下错误：
Caused by: org.h2.jdbc.JdbcSQLException: A file path that is implicitly relative to the current working directory is not allowed in the database URL "jdbc:h2:file:/home/public/h2". Use an absolute path, ~/name, ./name, or the baseDir setting instead. [90011-197]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:357) ~[h2-1.4.197.jar:1.4.197]
我也尝试过spring.datasource.url=jdbc:h2:file:~/home/public/h2 ，但没有成功。
我做错了什么以及如何正确配置路径？
我配置了 Spring Data REST 投影，当可以找到相关数据时，它会按预期工作。但是当没有找到相关数据时，会抛出以下错误：
{
"timestamp": 1532021102433,
"status": 500,
"error": "Internal Server Error",
"exception": "org.springframework.http.converter.HttpMessageNotWritableException",
"message": "Could not write JSON document: EL1007E: Property or field 'model' cannot be found on null (through reference chain: org.springframework.hateoas.PagedResources[\"_embedded\"]->java.util.Collections$UnmodifiableMap[\"processed\"]->java.util.ArrayList[0]->org.springframework.data.rest.webmvc.json.PersistentEntityJackson2Module$ProjectionResource[\"content\"]->com.sun.proxy.$Proxy122[\"model\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: EL1007E: Property or field 'model' cannot be found on null (through reference chain: org.springframework.hateoas.PagedResources[\"_embedded\"]->java.util.Collections$UnmodifiableMap[\"processed\"]->java.util.ArrayList[0]->org.springframework.data.rest.webmvc.json.PersistentEntityJackson2Module$ProjectionResource[\"content\"]->com.sun.proxy.$Proxy122[\"model\"])",
"path": "/processed/search/findByCompCode"
}
我的投影界面如下所示：
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.rest.core.config.Projection;
import java.util.Date;
@Projection(name = "usage-detail", types = {Usage.class})
interface UsageProjection {
String getUuid();
String getProduct();
Date getReportDate();
String …我正在从 Spring Boot 1 升级到 Spring Boot 2。
我只想挑选第一个结果。
PageRequest pageRequest = PageRequest.of(0, batchSize, Sort.Direction.ASC, "id");
在存储库上使用带注释的查询
@Query("select c from Component")
List<Component> findReturnComponent(PageRequest pageRequest);
我收到此错误消息
but parameter 'Optional[pageRequest]' not found in annotated query 'select c from Component
您好，我遇到了这个错误，我找到的解决方案都不起作用。我有一个购物车实体：
@Data
@Entity
public class Cart {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String status;
@ManyToOne(cascade = CascadeType.MERGE)
@JoinColumn(name = "usr_id", nullable = false)
private User usr;
@ElementCollection(targetClass=String.class)
private List<String> productsBarcode = new ArrayList<>();
private long nutritional_score;
}
和一个 User 实体
@Entity
@Data
public class User {
@Id
@GeneratedValue
private Long id;
private String firstname;
private String lastname;
private String email;
private String phone;
@JsonIgnore
@OneToMany(mappedBy = "id",cascade=CascadeType.ALL)
private List<Cart> carts = new ArrayList<Cart>();
}
当我尝试使用以下 JSON 传递 …
尝试从名为的列返回列表make会导致控制台中id找不到列的错误。指定的列id位于表中，但不确定为什么无法识别它。
汽车.java
package com.example.demo;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Car {
@Id
private String id;
private String make;
private String model;
private String year;
public Car() {
}
public Car(String id, String make, String model, String year) {
this.id = id;
this.make = make;
this.model = model;
this.year = year;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getMake() {
return …我有一个使用 Spring Data JPA 调用简单的 REST 服务findAll。问题是在控制台中记录了很多查询，因此我认为 Spring Data 不是对我的主类的每一行进行一次查询，而是对名为 的主类进行一次查询Dis。
我有一个主要实体，它必须仅获取一些用以下注释的数据@JsonView：
@Entity
@NamedQuery(name="Dis.findAll", query="SELECT d FROM Dis d")
public class Dis implements Serializable {
private static final long serialVersionUID = 1L;
@JsonView(View.Summary.class)
@Id
@Column(name="id_dis")
private Integer idDis;
private byte[] logo;
@JsonView(View.Summary.class)
private String text;
@JsonView(View.Summary.class)
@JsonManagedReference
//bi-directional many-to-one association to TipoValidazione
@ManyToOne(fetch=FetchType.EAGER)
@JoinColumn(name="validazione")
private TipoValidazione tipoValidazione;
//bi-directional many-to-one association to DisComune
@OneToMany(mappedBy="dis")
private List<DisComune> disComunes;
//bi-directional many-to-one association to PdfDis
@OneToMany(mappedBy="dis")
private List<PdfDis> …我有一个要求，我需要将一些员工数据插入 db2 数据库，下面是代码：
@Log4j2
@Service
@Transactional
public class EmployeeServiceImpl extends EmployeeService{
@Autowired
private EmployeeDataRepository employeeDataRepository;
@Override
@Transactional(rollbackOn = {DataAccessException.class})
public void insertEmployeeData(List<Employee> employeeList){
try{
employeeDataRepository.insertEmployeeData(employeeList);
}catch(DataAccessException ex){
log.error("Exception whie inserting data in db {}",ex.getMessage());
}
}
@Log4j2
@Repository
public class EmployeeDataRepositoryImpl implements EmployeeDataRepository{
@Autowired
private DataSource dataSource;
@Value("${db.schema}")
private String schema;
@Override
public void insertEmployeeData(List<Employee> employeeList){
this.jdbcInsert = new SimpleJdbcInsert(dataSource).withTableName("Employee");
for(Employee emp : employeeList){
Map<String,Object> parameters = new HashMap<String,Object>();
parameters.put("name", emp.name);
parameters.put("age", emp.age);
parameters.put("dateOfJoining", emp.dateOfJoining);
parameters.put("address", emp.address);
parameters.put("salary", emp.salary);
jdbcInsert.execute(parameters); …我有一个名为
public class Customer implements Auditable {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
@Column(name = "SellerID")
private Long id;
@Embedded
private AuditSection auditSection = new AuditSection();
......
......
}
@Embeddable
public class AuditSection implements Serializable {
private static final long serialVersionUID = -1934446958975060889L;
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "DateCreated")
private Date dateCreated;
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "DateModified")
private Date dateModified;
......
}
我正在尝试使用 criteriaBuilder 和谓词进行搜索
predicates.add(criteriaBuilder.and(criteriaBuilder.notEqual(root.get("modifiedDate"), new Date)));
在这里我得到了异常
org.springframework.dao.InvalidDataAccessApiUsageException: Unable to locate Attribute with the the given name [modifiedDate] on this ManagedType [unknown]; nested …spring-data-jpa ×10
spring-boot ×6
java ×4
spring ×4
spring-data ×2
criteria-api ×1
datasource ×1
h2 ×1
hibernate ×1
java-8 ×1
jpa ×1
repository ×1