问题：
组织。冬眠LazyInitializationException:无法初始化代理-无会话-
朱祺
我有错误在我的Hibernate代码和我需要知道如何修复它
错误：
“errorMessage:“无法初始化代理[tech.basarsoft.hayez.io.entity.University#gx8qcpipfnysrlripzmtgrt1qifuyb8]-无会话”，
CollageEntryPOint类
@Path("/collage")
public class CollageEntryPoint {
@Autowired
CollageService collageService;
@Secured
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public CollageResponseRest create(CollageRequestModel requestObject) {
CollageResponseRest returnValue = new CollageResponseRest();
// Prepare UserDTO
CollageDTO collageDTO = new CollageDTO();
BeanUtils.copyProperties(requestObject, collageDTO);
// // Create new user
CollageDTO createdRecord = collageService.create(collageDTO);
// //Prepare response
BeanUtils.copyProperties(createdRecord, returnValue);
return returnValue;
}
@Secured
@GET
@Path("/{id}")
@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public CollageResponseRest get(@PathParam("id") String id) {
CollageResponseRest returnValue = null;
CollageDTO cdto = collageService.get(id);
returnValue = new CollageResponseRest();
BeanUtils.copyProperties(cdto, returnValue);
return returnValue;
}
@Secured
@GET
@Transactional
@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public List<CollageResponseRest> getAll(@DefaultValue("0") @QueryParam("start") int start,
@DefaultValue("999999999") @QueryParam("limit") int limit) {
List<CollageDTO> collageDTOs = collageService.getAll(start, limit);
// Prepare return value
List<CollageResponseRest> returnValue = new ArrayList<CollageResponseRest>();
for (CollageDTO collageDTO : collageDTOs) {
CollageResponseRest RestModel = new CollageResponseRest();
BeanUtils.copyProperties(collageDTO, RestModel);
RestModel.setHref("/hayez/api/collage/" + collageDTO.getId());
returnValue.add(RestModel);
}
return returnValue;
}
@Secured
@PUT
@Path("/{id}")
@Consumes(MediaType.APPLICATION_JSON)
@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public CollageResponseRest update(@PathParam("id") String id,
CollageRequestModel details) {
// Prepare UserDTO
CollageDTO storedDetails = collageService.get(id);
// Set only those fields you would like to be updated with this request
if (details.getCode() != null && !details.getCode().isEmpty()) {
storedDetails.setName1(details.getName1());
}
storedDetails.setName2(details.getName2());
storedDetails.setActivated(details.getActivated());
storedDetails.setUniversity(details.getUniversity());
storedDetails.setAddress(details.getAddress());
storedDetails.setCurrentVersion(details.getCurrentVersion());
storedDetails.setDate(details.getDate());
storedDetails.setDates(details.getDates());
storedDetails.setDescription(details.getDescription());
storedDetails.setPhoneNumber(details.getPhoneNumber());
storedDetails.setRemark1(details.getRemark1());
// Update User Details
collageService.update(storedDetails);
// Prepare return value
CollageResponseRest returnValue = new CollageResponseRest();
BeanUtils.copyProperties(storedDetails, returnValue);
return returnValue;
}
@Secured
@DELETE
@Path("/{id}")
@Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
public DeleteResponseModel delete(@PathParam("id") String id) {
DeleteResponseModel returnValue = new DeleteResponseModel();
returnValue.setRequestOperation(RequestOperation.DELETE);
CollageDTO storedRecord = collageService.get(id);
collageService.delete(storedRecord);
returnValue.setResponseStatus(ResponseStatus.SUCCESS);
return returnValue;
}
}
拼贴：
public class CollageDTO implements java.io.Serializable {
private static final long serialVersionUID = 1L;
private String id;
private University university;
private String code;
private Integer currentVersion;
private Date date;
private String dates;
private String description;
private String remark1;
private String name1;
private String name2;
private Boolean activated;
private String address;
private String phoneNumber;
private String entityType;
/**
* @return the id
*/
public String getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(String id) {
this.id = id;
}
/**
* @return the university
*/
public University getUniversity() {
return university;
}
/**
* @param university the university to set
*/
public void setUniversity(University university) {
this.university = university;
}
/**
* @return the code
*/
public String getCode() {
return code;
}
/**
* @param code the code to set
*/
public void setCode(String code) {
this.code = code;
}
/**
* @return the currentVersion
*/
public Integer getCurrentVersion() {
return currentVersion;
}
/**
* @param currentVersion the currentVersion to set
*/
public void setCurrentVersion(Integer currentVersion) {
this.currentVersion = currentVersion;
}
/**
* @return the date
*/
public Date getDate() {
return date;
}
/**
* @param date the date to set
*/
public void setDate(Date date) {
this.date = date;
}
/**
* @return the description
*/
public String getDescription() {
return description;
}
/**
* @param description the description to set
*/
public void setDescription(String description) {
this.description = description;
}
/**
* @return the remark1
*/
public String getRemark1() {
return remark1;
}
/**
* @param remark1 the remark1 to set
*/
public void setRemark1(String remark1) {
this.remark1 = remark1;
}
/**
* @return the name1
*/
public String getName1() {
return name1;
}
/**
* @param name1 the name1 to set
*/
public void setName1(String name1) {
this.name1 = name1;
}
/**
* @return the name2
*/
public String getName2() {
return name2;
}
/**
* @param name2 the name2 to set
*/
public void setName2(String name2) {
this.name2 = name2;
}
/**
* @return the activated
*/
public Boolean getActivated() {
return activated;
}
/**
* @param activated the activated to set
*/
public void setActivated(Boolean activated) {
this.activated = activated;
}
/**
* @return the address
*/
public String getAddress() {
return address;
}
/**
* @param address the address to set
*/
public void setAddress(String address) {
this.address = address;
}
/**
* @return the phoneNumber
*/
public String getPhoneNumber() {
return phoneNumber;
}
/**
* @param phoneNumber the phoneNumber to set
*/
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
/**
* @return the entityType
*/
public String getEntityType() {
return entityType;
}
/**
* @param entityType the entityType to set
*/
public void setEntityType(String entityType) {
this.entityType = entityType;
}
/**
* @return the dates
*/
public String getDates() {
return dates;
}
/**
* @param dates the dates to set
*/
public void setDates(String dates) {
this.dates = dates;
}
}
Collage Entity:
@Entity
@Table(name="Collage"
,schema="dbo"
,catalog="hayez"
)
public class Collage implements java.io.Serializable {
private String id;
private University university;
private String code;
private Integer currentVersion;
private Date date;
private String description;
private String remark1;
private String name1;
private String name2;
private Boolean activated;
private String address;
private String phoneNumber;
private String entityType;
private Set visitors = new HashSet(0);
private Set groupOfVisitorses = new HashSet(0);
private Set groupOfVisitorses_1 = new HashSet(0);
private Set visitors_1 = new HashSet(0);
public Collage() {
}
public Collage(String id) {
this.id = id;
}
public Collage(String id, University university, String code, Integer currentVersion, Date date, String description, String remark1, String name1, String name2, Boolean activated, String address, String phoneNumber, String entityType, Set visitors, Set groupOfVisitorses, Set groupOfVisitorses_1, Set visitors_1) {
this.id = id;
this.university = university;
this.code = code;
this.currentVersion = currentVersion;
this.date = date;
this.description = description;
this.remark1 = remark1;
this.name1 = name1;
this.name2 = name2;
this.activated = activated;
this.address = address;
this.phoneNumber = phoneNumber;
this.entityType = entityType;
this.visitors = visitors;
this.groupOfVisitorses = groupOfVisitorses;
this.groupOfVisitorses_1 = groupOfVisitorses_1;
this.visitors_1 = visitors_1;
}
@Id
@Column(name="id", unique=true, nullable=false)
public String getId() {
return this.id;
}
public void setId(String id) {
this.id = id;
}
@ManyToOne(fetch=FetchType.LAZY, cascade = CascadeType.ALL)
@JoinColumn(name="University_Id")
public University getUniversity() {
return this.university;
}
public void setUniversity(University university) {
this.university = university;
}
@Column(name="code")
public String getCode() {
return this.code;
}
public void setCode(String code) {
this.code = code;
}
@Column(name="currentVersion")
public Integer getCurrentVersion() {
return this.currentVersion;
}
public void setCurrentVersion(Integer currentVersion) {
this.currentVersion = currentVersion;
}
@Temporal(TemporalType.TIMESTAMP)
@Column(name="date", length=23)
public Date getDate() {
return this.date;
}
public void setDate(Date date) {
this.date = date;
}
@Column(name="description")
public String getDescription() {
return this.description;
}
public void setDescription(String description) {
this.description = description;
}
@Column(name="remark1")
public String getRemark1() {
return this.remark1;
}
public void setRemark1(String remark1) {
this.remark1 = remark1;
}
@Column(name="name1")
public String getName1() {
return this.name1;
}
public void setName1(String name1) {
this.name1 = name1;
}
@Column(name="name2")
public String getName2() {
return this.name2;
}
public void setName2(String name2) {
this.name2 = name2;
}
@Column(name="activated")
public Boolean getActivated() {
return this.activated;
}
public void setActivated(Boolean activated) {
this.activated = activated;
}
@Column(name="address")
public String getAddress() {
return this.address;
}
public void setAddress(String address) {
this.address = address;
}
@Column(name="phoneNumber")
public String getPhoneNumber() {
return this.phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
@Column(name="entityType")
public String getEntityType() {
return this.entityType;
}
public void setEntityType(String entityType) {
this.entityType = entityType;
}
@OneToMany(fetch=FetchType.LAZY, mappedBy="collage")
public Set getVisitors() {
return this.visitors;
}
public void setVisitors(Set visitors) {
this.visitors = visitors;
}
@OneToMany(fetch=FetchType.LAZY, mappedBy="collage")
public Set getGroupOfVisitorses() {
return this.groupOfVisitorses;
}
public void setGroupOfVisitorses(Set groupOfVisitorses) {
this.groupOfVisitorses = groupOfVisitorses;
}
@OneToMany(fetch=FetchType.LAZY, mappedBy="collage")
public Set getGroupOfVisitorses_1() {
return this.groupOfVisitorses_1;
}
public void setGroupOfVisitorses_1(Set groupOfVisitorses_1) {
this.groupOfVisitorses_1 = groupOfVisitorses_1;
}
@OneToMany(fetch=FetchType.LAZY, mappedBy="collage")
public Set getVisitors_1() {
return this.visitors_1;
}
public void setVisitors_1(Set visitors_1) {
this.visitors_1 = visitors_1;
}
}
和DAOSQL实现
@Override
public List<CollageDTO> getAll(int start, int limit) {
CriteriaBuilder cb = session.getCriteriaBuilder();
//Create Criteria against a particular persistent class
CriteriaQuery<Collage> criteria = cb.createQuery(Collage.class);
//Query roots always reference entities
Root<Collage> collageRoot = criteria.from(Collage.class);
criteria.select(collageRoot);
// Fetch results from start to a number of "limit"
List<Collage> searchResults = session.createQuery(criteria).list();
List<CollageDTO> returnValue = new ArrayList<CollageDTO>();
for (Collage collage : searchResults) {
CollageDTO collageDTO = new CollageDTO();
BeanUtils.copyProperties(collage, collageDTO);
returnValue.add(collageDTO);
}
return returnValue;
}
这是hibernate。cfg文件
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.microsoft.sqlserver.jdbc.SQLServerDriver</property>
<property name="hibernate.connection.url">jdbc:sqlserver://localhost:1433;databaseName=hayez</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password">sa@123</property>
<property name="dialect">org.hibernate.dialect.SQLServerDialect</property>
<property name="hibernate.id.new_generator_mappings">true</property>
<property name="show_sql">true</property>
<property name="hibernate.hbm2ddl.auto">update</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">25</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="current_session_context_class">thread</property>
<property
name="hibernate.enable_lazy_load_no_trans"
>false</property>
<mapping resource="tech/basarsoft/hayez/io/entity/VisitorPoints.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Branch.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/SalesInvoiceLine.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/VisitingDocument.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Supplier.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Room.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/GroupOfVisitorsLine.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/VisitingDocumentLine.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/GroupOfVisitors.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Visitor.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/University.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Quantity.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Collage.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Warehouse.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Employee.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/PurchaseInvoiceLine.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/Item.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/SalesInvoice.hbm.xml"/>
<mapping resource="tech/basarsoft/hayez/io/entity/PurchaseInvoice.hbm.xml"/>
</session-factory>
</hibernate-configuration>
拼贴服务：
public class CollageServiceImpl implements CollageService {
CollageDAO database;
public CollageServiceImpl(CollageDAO database) {
this.database = database;
}
EntityUtils entityUtils = new EntityUtils();
@Override
public CollageDTO create(CollageDTO cdto) {
CollageDTO returnValue = null;
// Check if user already exists
CollageDTO existingRecord = this.getByCode(cdto.getCode());
if (existingRecord != null) {
throw new CouldNotCreateRecordException(ErrorMessages.RECORD_ALREADY_EXISTS.name());
}
if (cdto.getDates() != null) {
try {
Date date;
date = entityUtils.ConvertDateString(cdto.getDates());
cdto.setDate(date);
} catch (ParseException ex) {
cdto.setDate(null);
}
} else {
cdto.setDate(null);
}
String Id = entityUtils.generateEntityId(30);
cdto.setId(Id);
cdto.setEntityType("Collage");
cdto.setActivated(true);
// Record data into a database
returnValue = this.save(cdto);
// Return back the user profile
return returnValue;
}
@Override
public CollageDTO get(String id) {
CollageDTO returnValue = null;
try {
this.database.openConnection();
returnValue = this.database.get(id);
} catch (Exception ex) {
ex.printStackTrace();
throw new NoRecordFoundException(ErrorMessages.NO_RECORD_FOUND.getErrorMessage());
} finally {
this.database.closeConnection();
}
return returnValue;
}
@Override
public CollageDTO getByCode(String code) {
CollageDTO collageDTO = null;
if (code == null || code.isEmpty()) {
return collageDTO;
}
// Connect to database
try {
this.database.openConnection();
collageDTO = this.database.getByCode(code);
} finally {
this.database.closeConnection();
}
return collageDTO;
}
@Override
public List<CollageDTO> getAll(int start, int limit) {
List<CollageDTO> cdtos = null;
University university = new University();
// Get users from database
try {
this.database.openConnection();
cdtos = this.database.getAll(start, limit);
} finally {
this.database.closeConnection();
}
return cdtos;
}
@Override
public void update(CollageDTO cdto) {
try {
if (cdto.getDates() != null) {
try {
Date date;
date = entityUtils.ConvertDateString(cdto.getDates());
cdto.setDate(date);
} catch (ParseException ex) {
cdto.setDate(null);
}
} else {
cdto.setDate(null);
}
// Connect to database
this.database.openConnection();
// Update User Details
this.database.update(cdto);
} catch (Exception ex) {
throw new CouldNotUpdateRecordException(ex.getMessage());
} finally {
this.database.closeConnection();
}
}
@Override
public void delete(CollageDTO cdto) {
try {
this.database.openConnection();
this.database.delete(cdto);
} catch (Exception ex) {
throw new CouldNotDeleteRecordException(ex.getMessage());
} finally {
this.database.closeConnection();
}
// Verify that user is deleted
try {
cdto = get(cdto.getId());
} catch (NoRecordFoundException ex) {
cdto = null;
}
if (cdto != null) {
throw new CouldNotDeleteRecordException(
ErrorMessages.COULD_NOT_DELETE_RECORD.getErrorMessage());
}
}
private CollageDTO save(CollageDTO cdto) {
CollageDTO returnValue = null;
// Connect to database
try {
this.database.openConnection();
returnValue = this.database.save(cdto);
} finally {
this.database.closeConnection();
}
return returnValue;
}
}
拼贴映射：
<hibernate-mapping>
<class name="tech.basarsoft.hayez.io.entity.Collage" table="Collage" schema="dbo" catalog="hayez" optimistic-lock="version">
<id name="id" type="string">
<column name="id" />
<generator class="assigned" />
</id>
<many-to-one name="university" class="tech.basarsoft.hayez.io.entity.University" fetch="join">
<column name="University_Id" />
</many-to-one>
<property name="code" type="string">
<column name="code" />
</property>
<property name="currentVersion" type="java.lang.Integer">
<column name="currentVersion" />
</property>
<property name="date" type="timestamp">
<column name="date" length="23" />
</property>
<property name="description" type="string">
<column name="description" />
</property>
<property name="remark1" type="string">
<column name="remark1" />
</property>
<property name="name1" type="string">
<column name="name1" />
</property>
<property name="name2" type="string">
<column name="name2" />
</property>
<property name="activated" type="java.lang.Boolean">
<column name="activated" />
</property>
<property name="address" type="string">
<column name="address" />
</property>
<property name="phoneNumber" type="string">
<column name="phoneNumber" />
</property>
<property name="entityType" type="string">
<column name="entityType" />
</property>
</class>
</hibernate-mapping>
大学地图：
<hibernate-mapping>
<class name="tech.basarsoft.hayez.io.entity.University" table="University" schema="dbo" catalog="hayez" optimistic-lock="version">
<id name="id" type="string">
<column name="id" />
<generator class="assigned" />
</id>
<property name="code" type="string">
<column name="code" />
</property>
<property name="currentVersion" type="java.lang.Integer">
<column name="currentVersion" />
</property>
<property name="date" type="timestamp">
<column name="date" length="23" />
</property>
<property name="description" type="string">
<column name="description" />
</property>
<property name="remark1" type="string">
<column name="remark1" />
</property>
<property name="name1" type="string">
<column name="name1" />
</property>
<property name="name2" type="string">
<column name="name2" />
</property>
<property name="activated" type="java.lang.Boolean">
<column name="activated" />
</property>
<property name="address" type="string">
<column name="address" />
</property>
<property name="phoneNumber" type="string">
<column name="phoneNumber" />
</property>
<property name="entityType" type="string">
<column name="entityType" />
</property>
<set name="collages" table="Collage" inverse="true" lazy="true" fetch="select">
<key>
<column name="University_Id" />
</key>
<one-to-many class="tech.basarsoft.hayez.io.entity.Collage" />
</set>
</class>
</hibernate-mapping>
IAM使用Hibernate with Spring， jersey和MSSQL服务器创建apis
共有1个答案
华甫
我通过将拼贴类更改为：
@Entity
@Table(name="Collage"
,schema="dbo"
,catalog="hayez"
)
public class Collage implements java.io.Serializable {
@Id
@Column(name="id", unique=true, nullable=false)
private String id;
@Column(name="code")
private String code;
@Column(name="currentVersion")
private Integer currentVersion;
@Temporal(TemporalType.TIMESTAMP)
@Column(name="date", length=23)
private Date date;
@Column(name="description")
private String description;
@Column(name="remark1")
private String remark1;
@Column(name="name1")
private String name1;
@Column(name="name2")
private String name2;
@Column(name="activated")
private Boolean activated;
@Column(name="address")
private String address;
@Column(name="phoneNumber")
private String phoneNumber;
@Column(name="entityType")
private String entityType;
@ManyToOne(fetch=FetchType.EAGER, cascade = CascadeType.ALL)
@JoinColumn(name="University_Id")
private University university;
public Collage() {
}
<!-- Setter And Getter Here ... -->
}
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问题内容： 我有下一个错误： 我的实体： 我有一个服务班： 我从另一种服务方法调用服务： 但是，当我试图调用这个方法我收到线异常，当我打电话时，也会发生同样的异常上。我已经检查了事务管理器，并且配置正确，并且此步骤中存在事务。另外，我已经检查了关于与此异常相关的stackoverflow的大量答案，但没什么用。 可能是什么原因造成的？ 问题答案： 看来模型是一个独立的实体。 尝试合并并在合并实例上
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我知道我的问题很奇怪，很难理解 我为我的项目创建了一些结构。但每次我都会遇到不同的问题，如＜code＞无法初始化代理-再次没有会话＜/code＞或＜code＞不可序列化异常＜/code＞等 我想得到一些建议或帮助。我尝试使用注释< code>transactional，但不知道在哪种情况下应该使用< code > implements Serializable 。当然，我知道如果我想在视图范围内使
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问题内容： 我通过服务将dao称为 在岛上，我得到的产品 运行正常，但如果我将dao类更改为 我得到org.hibernate.LazyInitializationException：无法初始化代理- 没有会话。例外发生在我只是在打印产品的视图层中。我不明白为什么在dao方法中在同一行中返回会导致视图层出现异常，但是如果将其保存在引用中然后返回它，效果很好。 问题答案： 这是一个很好的参考，可让您