Java.lang.ClassCastException:模型类无法强制转换为模型类
从上面的标题来看，目前我遇到了一个问题，即无法从一个模型类转换到另一个模型类。我写的代码有什么错误吗？ 请随时向我询问更多信息。多谢各位 我怀疑： 这种方法“selectTheOldFnException”有一些错误，那就是使用了hibernate，但我不确定这个理论 休息控制器Java.lang.ClassCastException:模型类无法强制转换为模型类,java,spring-boot,Java,Spring Boot,从上面的标题来看，目前我遇到了一个问题，即无法从一个模型类转换到另一个模型类。我写的代码有什么错误吗？ 请随时向我询问更多信息。多谢各位 我怀疑： 这种方法“selectTheOldFnException”有一些错误，那就是使用了hibernate，但我不确定这个理论 休息控制器 @RequestMapping(value = "/runMatching/{id}", method = RequestMethod.GET, params = "actionRun") public Str
@RequestMapping(value = "/runMatching/{id}", method = RequestMethod.GET, params = "actionRun")
public String runMatching(@PathVariable(required = true, name = "id") long id) {
System.out.println("the id is: " + id);
if (fileExist = true) {
//upload to db
int uploadDB = dmttDAO.uploadListToDB(filePath);
try {
//int result = matchingEngine.execute();
matchingEngine.execute();
} catch (Exception ex) {
ex.printStackTrace();
}
} else {
break;
}
}
}
return "redirect:/excpMonitor";
}
package com.portal.dmtt.match;
import com.portal.dmtt.model.exceptionMonitoring.FN_Old_Exception;
import com.portal.dmtt.model.exceptionMonitoring.FN_Result_Set;
import com.portal.dmtt.model.exceptionMonitoring.config.FN_FR_new_Location;
import org.apache.log4j.Logger;
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionException;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import java.util.List;
public class MatchingEngine {
private final Logger logger = Logger.getLogger(MatchingEngine.class);
private List<FN_Old_Exception> fnOldExceptionList;
private List<FN_Result_Set> fnResultSetList;
private List<FN_FR_new_Location> fnFrNewLocationList;
private FN_Result_Set theFnResultSet;
private FN_Old_Exception theFnOldException;
public int execute() {
int result = 0;
System.out.println(">>>>>>>>>>>>>>>>Start Matching Engine<<<<<<<<<<<<<<<< ");
System.out.println("Start: selectTheOldFnException ");
result = selectTheOldFnException();
if (result < 0) {
logger.error("[Problem method at selectTheOldFnException]. Result: " + result);
return -1;
}
System.out.println("Start: selectTheConfigurationFN ");
// result = selectTheConfigurationFN();
if (result < 0) {
logger.error("[Problem method at selectTheOldFnException]. Result: " + result);
return -2;
}
System.out.println("Start: matchFN ");
//result = matchFN();
if (result < 0) {
logger.error("[Problem method at matchFN]. Result: " + result);
return -3;
}
System.out.println("Start: theFnResultSet ");
//result = writeItemToDb(theFnResultSet);
if (result < 0) {
logger.error("[Problem method at write item to db]. Result: " + result);
return -4;
}
System.out.println("Start: findNewFN ");
//result = findNewFN();
if (result < 0) {
logger.error("[Problem method at findNewFN]. Result: " + result);
return -5;
}
System.out.println(">>>>>>>>>>>>>>>>End Matching Engine<<<<<<<<<<<<<<<< ");
return result;
}
/**
* Select the old fn Exception
*
* @return
*/
private int selectTheOldFnException() {
int result = 0;
// create session factory
SessionFactory factory = new Configuration().configure("hibcfg.eMonitor.xml").addAnnotatedClass(FN_Old_Exception.class).buildSessionFactory();
// create a session
Session session = factory.openSession();
try {
String Query1 = "from FN_Old_Exception";
// start a transaction
session.beginTransaction();
// query current reported watch list
fnOldExceptionList = session.createQuery(Query1).list();
// commit transaction
session.getTransaction().commit();
result = fnOldExceptionList.size();
//System.out.println(fnOldExceptionList.toString());
for (int i = 0; i < result; i++) {
System.out.println("selectTheOldFnException ---->>>" + fnOldExceptionList.get(i).toString());
}
} catch (SessionException e) {
logger.fatal("Select selectFnException_New: Caught an Exception" + e.getMessage());
} finally {
session.close();
factory.close();
}
return result;
}
/**
* match FN based on parameter
*
* @return
*/
private int matchFN() {
int result = 0;
result = fnOldExceptionList.size();
int sizeFNConfiguration = fnFrNewLocationList.size();
for (int j = 0; j < sizeFNConfiguration; j++) {
String matchSpId = fnFrNewLocationList.get(j).getMatch_SP_Id();
String matchLocId = fnFrNewLocationList.get(j).getMatch_Loc_Id();
String remarks = fnFrNewLocationList.get(j).getRemarks();
theFnOldException = new FN_Old_Exception();
for (int i = 0; i < result; i++) {
if (((fnOldExceptionList.get(i).getSp_Id().equals(matchSpId))) && ((fnOldExceptionList.get(i).getLoc_Id().equals(matchLocId)))) {
// set the new remarks after hit the logic
fnOldExceptionList.get(i).setRemarks(remarks);
String spId = fnOldExceptionList.get(i).getSp_Id();
String locId = fnOldExceptionList.get(i).getLoc_Id();
String status = fnOldExceptionList.get(i).getXfer_Xmit_Status();
String fileName = fnOldExceptionList.get(i).getXfer_File_Name();
String updateTS = fnOldExceptionList.get(i).getUpdate_Ts();
String yymm = fnOldExceptionList.get(i).getYYMM();
String Remarks = fnOldExceptionList.get(i).getRemarks();
//display message
//System.out.println("matchFN --->>>" + fnOldExceptionList.get(i).toString());
theFnResultSet = new FN_Result_Set(spId, locId, status, fileName, updateTS, yymm, Remarks);
writeItemToDb(theFnResultSet);
}
}
}
return result;
}
/**
* SAVE-
* all result to the new table (FN_Result_Set)
*
* @return
*/
public int writeItemToDb(FN_Result_Set fn_result_set) {
int result = 0;
// create session factory
SessionFactory factory = new Configuration().configure("hibcfg.eMonitor.xml").addAnnotatedClass(FN_Result_Set.class).buildSessionFactory();
// create a session
Session session = factory.openSession();
try {
session.beginTransaction();
session.saveOrUpdate(fn_result_set);
session.getTransaction().commit();
} catch (HibernateException ex1) {
ex1.printStackTrace();
} catch (Exception ex) {
ex.printStackTrace();
} finally {
session.close();
factory.close();
}
return result;
}
/**
* differentiate between two entity
*
* @return
*/
private int findNewFN() {
int result = 0;
result = fnOldExceptionList.size();
for (int i = 0; i < result; i++) {
if (fnOldExceptionList.get(i).getRemarks() == null) {
String spId = fnOldExceptionList.get(i).getSp_Id();
String locId = fnOldExceptionList.get(i).getLoc_Id();
String status = fnOldExceptionList.get(i).getXfer_Xmit_Status();
String fileName = fnOldExceptionList.get(i).getXfer_File_Name();
String updateTS = fnOldExceptionList.get(i).getUpdate_Ts();
String yymm = fnOldExceptionList.get(i).getYYMM();
String Remarks = "New Location";
theFnResultSet = new FN_Result_Set(spId, locId, status, fileName, updateTS, yymm, Remarks);
writeItemToDb(theFnResultSet);
}
}
return result;
}
/**
* select the configuration selected FN from database
*
* @return
*/
private int selectTheConfigurationFN() {
int result = 0;
// create session factory
SessionFactory factory = new Configuration().configure("hibcfg.eMonitor.xml").addAnnotatedClass(FN_FR_new_Location.class).buildSessionFactory();
// create a session
Session session = factory.openSession();
try {
String Query1 = "from FN_FR_new_Location";
// start a transaction
session.beginTransaction();
// query current reported watch list
fnFrNewLocationList = session.createQuery(Query1).list();
// commit transaction
session.getTransaction().commit();
result = fnFrNewLocationList.size();
//System.out.println(fnOldExceptionList.toString());
for (int i = 0; i < result; i++) {
System.out.println("selectTheOldFnException ---->>>" + fnFrNewLocationList.get(i).toString());
}
} catch (SessionException e) {
logger.fatal("Select fnFrNewLocationList : Caught an Exception" + e.getMessage());
} finally {
session.close();
factory.close();
}
return result;
}
}
java.lang.ClassCastException: com.portal.dmtt.model.exceptionMonitoring.FN_Old_Exception cannot be cast to com.portal.dmtt.model.exceptionMonitoring.FN_Old_Exception
at com.portal.dmtt.match.MatchingEngine.selectTheOldFnException(MatchingEngine.java:125)
at com.portal.dmtt.match.MatchingEngine.execute(MatchingEngine.java:49)
at com.portal.dmtt.match.MatchingEngine.finalExecution(MatchingEngine.java:37)
at com.portal.dmtt.controller.ExcpMonitorController.runMatching(ExcpMonitorController.java:236)
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:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
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:52)
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:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
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.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
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.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
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:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
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:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
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)
<!--
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
-->
这里您使用了两个同名的不同类
FN\u Old\u Exceptioncom.portal.dmtt.model.exceptionMonitoring.FN_Old_Exception
需要查看完整的代码库以解决该冲突，您可以共享吗？您可以显示matchingEngine类的完整代码吗？我更新了matchingEngine的完整类。如果你需要什么，尽管问我。谢谢你在使用Spring Boot的DevTools吗？@AndyWilkinson我没有使用这种依赖关系，如果它与我面临的问题有关的话。。将启用它并尝试它。谢谢，这没用。这是这个问题的一个可能原因，但是如果你不使用它，它一定是由其他原因引起的。也许你可以用一个新的答案更新你的问题，这样人们就不必猜测问题的原因了？谢谢你的建议，我刚刚发布了问题的答案。：）或者，您可以对模型
FN\u Old\u Exceptioncom.portal.dmtt.model.exceptionMonitoring.FN_Old_Exception