问题：
未能在类上找到适当的构造函数
廖弘伟
我试图将本机SQL结果映射到POJO，但它返回了一个错误。以下是完整的堆栈跟踪：
Hibernate: SELECT * FROM members_tb where memberName like ?
2019-12-19 07:40:20.688 TRACE 32472 --- [nio-8084-exec-2] o.h.type.descriptor.sql.BasicBinder : binding parameter [1] as [VARCHAR] - [%Frank%]
java.lang.IllegalArgumentException: Could not locate appropriate constructor on class : com.app.ecclesiamainframe.entity.Members
at org.hibernate.loader.custom.ConstructorResultColumnProcessor.resolveConstructor(ConstructorResultColumnProcessor.java:92)
at org.hibernate.loader.custom.ConstructorResultColumnProcessor.performDiscovery(ConstructorResultColumnProcessor.java:45)
at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:494)
at org.hibernate.loader.Loader.processResultSet(Loader.java:2338)
at org.hibernate.loader.Loader.getResultSet(Loader.java:2294)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2050)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2012)
at org.hibernate.loader.Loader.doQuery(Loader.java:953)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:354)
at org.hibernate.loader.Loader.doList(Loader.java:2815)
at org.hibernate.loader.Loader.doList(Loader.java:2797)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2629)
at org.hibernate.loader.Loader.list(Loader.java:2624)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:338)
at org.hibernate.internal.SessionImpl.listCustomQuery(SessionImpl.java:2123)
at org.hibernate.internal.AbstractSharedSessionContract.list(AbstractSharedSessionContract.java:1134)
at org.hibernate.query.internal.NativeQueryImpl.doList(NativeQueryImpl.java:173)
at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1526)
at org.hibernate.query.Query.getResultList(Query.java:165)
at com.app.ecclesiamainframe.service.impl.MembersServiceImpl.findByMembername(MembersServiceImpl.java:63)
at com.app.ecclesiamainframe.service.impl.MembersServiceImpl$$FastClassBySpringCGLIB$$b6791a90.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:366)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
at com.app.ecclesiamainframe.service.impl.MembersServiceImpl$$EnhancerBySpringCGLIB$$81c0914a.findByMembername(<generated>)
at com.app.ecclesiamainframe.controller.MembersController.getMember(MembersController.java:64)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:860)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1591)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
2019-12-19 07:40:21.744 INFO 32472 --- [nio-8084-exec-2] i.StatisticalLoggingSessionEventListener : Session Metrics {
1250700 nanoseconds spent acquiring 1 JDBC connections;
0 nanoseconds spent releasing 0 JDBC connections;
0 nanoseconds spent preparing 0 JDBC statements;
0 nanoseconds spent executing 0 JDBC statements;
0 nanoseconds spent executing 0 JDBC batches;
0 nanoseconds spent performing 0 L2C puts;
0 nanoseconds spent performing 0 L2C hits;
0 nanoseconds spent performing 0 L2C misses;
0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections);
0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections)
}
2019-12-19 08:39:48.231 WARN 32472 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=45s935ms542µs800ns).
2019-12-19 08:46:56.149 WARN 32472 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=3m17s562ms942µs).
2019-12-19 08:46:57.264 WARN 32472 --- [l-2 housekeeper] com.zaxxer.hikari.pool.HikariPool : HikariPool-2 - Thread starvation or clock leap detected (housekeeper delta=3m17s563ms485µs800ns).
这是我的Membermapping.xml：
<sql-result-set-mapping name="MemberMappingXml">
<constructor-result target-class="com.app.ecclesiamainframe.entity.Members">
<column name="memberId" />
<column name="dcaRegno" />
<column name="address" />
<column name="age" />
<column name="areaId" />
<column name="birthday" />
<column name="cellId" />
<column name="dca" />
<column name="department" />
<column name="editor" />
<column name="firstTime" />
<column name="gender" />
<column name="maritalStatus" />
<column name="memberEmail" />
<column name="memberHomePhoneNum" />
<column name="memberMobileNum" />
<column name="memberName" />
<column name="note" />
<column name="secondTime" />
</constructor-result>
</sql-result-set-mapping>
这是我的实体类：
/**
*
*/
package com.app.ecclesiamainframe.entity;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.ColumnResult;
import javax.persistence.ConstructorResult;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SqlResultSetMapping;
import javax.persistence.Table;
import org.hibernate.annotations.Type;
import org.hibernate.annotations.TypeDef;
import com.vladmihalcea.hibernate.type.json.JsonStringType;
import lombok.Data;
/**
* @author Harry
*
*/
@Entity
@Table(name="members_tb")
@Data
@TypeDef(
name = "json",
typeClass = JsonStringType.class
)
@SqlResultSetMapping(
name = "MemberMapping",
classes = @ConstructorResult(
targetClass = Members.class,
columns = {
@ColumnResult(name = "memberId", type = Long.class),
@ColumnResult(name = "dcaRegno", type = Long.class),
@ColumnResult(name = "address"),
@ColumnResult(name = "age"),
@ColumnResult(name = "areaId", type = Long.class),
@ColumnResult(name = "birthday"),
@ColumnResult(name = "cellId", type = Long.class),
@ColumnResult(name = "dca"),
@ColumnResult(name = "department"),
@ColumnResult(name = "editor"),
@ColumnResult(name = "firstTime"),
@ColumnResult(name = "gender"),
@ColumnResult(name = "maritalStatus"),
@ColumnResult(name = "memberEmail"),
@ColumnResult(name = "memberHomePhoneNum", type = Long.class),
@ColumnResult(name = "memberMobileNum", type = Long.class),
@ColumnResult(name = "memberName"),
@ColumnResult(name = "note"),
@ColumnResult(name = "secondTime")
}))
public class Members implements Serializable {
/**
*
*/
public Members() {}
private static final long serialVersionUID = 1L;
@Id
@Column(name="memberId")
@GeneratedValue(strategy = GenerationType.AUTO)
private Long memberId;
@Column(name="dcaRegno")
private Long dcaRegno;
@Column(name="memberName")
private String memberName;
@Column(name="memberMobileNum")
private Long memberMobileNum;
@Column(name="memberHomePhoneNum")
private Long memberHomePhoneNum;
@Column(name="memberEmail")
private String memberEmail;
@Column(name="gender")
private String gender;
@Column(name="department")
private String department;
@Type(type = "json")
@Column(columnDefinition = "json",name="address")
private String address;
@Column(name="cellId")
private Long cellId;
@Column(name="areaId")
private Long areaId;
@Column(name="maritalStatus")
private String maritalStatus;
@Column(name="age")
private String age;
@Column(name="birthday")
private String birthday;
@Column(name="firstTime")
private String firstTime;
@Column(name="secondTime")
private String secondTime;
@Type(type = "json")
@Column(columnDefinition = "json",name="dca")
private String dca;
@Column(name="note")
private String note;
@Column(name="editor")
private String editor;
public Members(Long memberId,String memberName) {
this.memberId = memberId;
this.memberName = memberName;
}
public Members(Long memberId,Long dcaRegno,String memberName,Long memberMobileNum,Long memberHomePhoneNum,String memberEmail,String gender,String department,
String address,Long cellId,Long areaId,String maritalStatus,String age,String birthday,String firstTime,String secondTime,
String dca,String note,String editor) {
this.memberId = memberId;
this.dcaRegno = dcaRegno;
this.address = address;
this.age = age;
this.areaId = areaId;
this.birthday = birthday;
this.cellId = cellId;
this.dca = dca;
this.department = department;
this.editor = editor;
this.firstTime = firstTime;
this.gender = gender;
this.maritalStatus = maritalStatus;
this.memberEmail = memberEmail;
this.memberHomePhoneNum = memberHomePhoneNum;
this.memberMobileNum = memberMobileNum;
this.memberName = memberName;
this.note = note;
this.secondTime = secondTime;
}
}
下面是我的成员服务实现:
@Transactional
@SuppressWarnings("unchecked")
public List<Members> findByMembername(String memberName)
{
//return membersDao.findByMemberName(memberName);
List<Members> members = null;
try {
session = HibernateUtil.getSessionFactory().openSession();
transaction = session.beginTransaction();
// Native query selecting all columns
Query query = session.createNativeQuery("SELECT * FROM members_tb where memberName like :memberName","MemberMapping")
.setParameter("memberName","%"+memberName+"%"); //named parameter binding
members = query.getResultList();
transaction.commit();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (session != null) {
session.close();
}
}
// HibernateUtil.shutdown();
return members;
}
请问我如何消除错误并设计一个合适的构造函数???可能是如果我不必将每一列加载到构造函数中，尽管我希望所有列都映射到结果中。
共有3个答案
薛淮晨
请在pojo类中创建此构造函数。正如我所见，构造函数之间不匹配
希望这对你有用
越鸿才
列出的列与构造函数参数的顺序不同。
Parameters Columns
========================= ==================
Long memberId memberId
Long dcaRegno dcaRegno
String memberName address
Long memberMobileNum age
Long memberHomePhoneNum areaId
String memberEmail birthday
String gender cellId
String department dca
String address department
Long cellId editor
Long areaId firstTime
String maritalStatus gender
String age maritalStatus
String birthday memberEmail
String firstTime memberHomePhoneNum
String secondTime memberMobileNum
String dca memberName
String note note
String editor secondTime
狄冠宇
您必须为此创建一个构造函数。
在您使用SqlResultsetM平的类中创建一个构造函数，并将构造函数中的变量保持在与SqlResultsetM平中的变量相同的顺序
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