本文介绍了无法在类上找到适当的构造函数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试将本机SQL结果映射到我的POJO，但是返回错误.这是完整的堆栈跟踪:
I am trying to map my native SQL result to my POJO, but it's returning an error.Here is the full stack trace:
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:
Here is my 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;
}
}
这是我的会员服务实施方式:
Here is my Member Service Implementation:
@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;
}
请问我该如何消除错误并设计适当的构造函数? 尽管我希望所有列都映射到结果中，但可能不必将每一列都加载到构造函数中.
Please how do i do away with the error and design an appropriate constructor ??? Possibly if i don't have to load every column into the constructor although i want all columns mapped in the result.
推荐答案
您将为此创建一个构造函数.
You will have to create a constructor for this.
在使用了SqlResultsetMapping的类中创建一个构造函数，并按照与将它们保存在SqlResultsetMapping
Create a constructor in the class in which you have used SqlResultsetMapping and keep the variables in the constructor in the same sequence as you have kept them in the SqlResultsetMapping
这篇关于无法在类上找到适当的构造函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！