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Parametersparams={"abc": 0}Jsonobject Converting int types Jsonobject json = Jsonobject.fromobject (params); if (Json.containskey ("Desgin_review_type")) { value=json.getint ("abc") + "";}}Run error notation Java.lang.Integer cannot be cast to java.lang.String>String value = "; mapJsonobject Convert int type--java.lang.integer cannot is cast to java.lang.String

java.lang.ClassCastException: $Proxy 9 cannot is cast to TEST.SPRING.SERVICE.IMPL.PERSONSERVICEIMPL2 at Test.junit. Testpersonservice.test (Testpersonservice.java: -) at Sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method) at Sun.reflect.NativeMethodAccessorImpl.invoke (Nativemethodaccessorimpl.java: the) at Sun.reflect.DelegatingMethodAccessorImpl.invoke (Delegatingmethodaccessorimpl.java: -) at Java.lang.reflect.Method.invoke (Method.java:59

public class TestException { public static void Main (string[] args) { object obj = new Integer (1); int i = (Integer) (obj); system.out.println (i); object object = new Object (); if (Object instanceof Integer) { NBSP;SYSTEM.OUT.PRINTLN (TRUE); } int j = (Integer) object; system.out.println (j); } } 1"main" Java.lang.ClassCastException:java.lang.Object cannot is cast to Java.lang.Integer at Testexception.main (Te

I use the Pagehelper 4.2.0, use it for the form of paging processing and display, the first time you can see the results of pagination, refresh the second time will not show, the console appears: Cause: Java.lang.ClassCastException:java.lang.String cannot is cast to org.apache.ibatis.mapping.MappedStatement error Solution: Through the data query on the occurrence of the problem, found that pagehelper 4.2.0 existence of the first execution of normal,

Today I want to study the MP3 and then use the following code when outputting the MP3 length (online):string file = "D:\\accountdaemon\\my Music\\mymusics\\luxtos.mp3"; Shellclass sh = new Shellclass (); Folder dir = sh. NameSpace (path.getdirectoryname (file)); FolderItem item = dir. ParseName (path.getfilename (file)); String str = dir. Getdetailsof (item, 27); Gets the length of the song. Console.WriteLine (str);And then there's this:Unha

HQL in keyword query reported "Ljava.lang.Long; Cannot is cast to Java.lang.Long "exception.Incoming parametersLong[] Type: useridsLong type: RIDQuery q = getsession (). CreateQuery ("Select User from user user join User.roles as role where role.id Q.setparameter ("RID", RID);q.setparameter ("UIDs", UIDs);The error message for executing this code is as follows:650) this.width=650; "class=" Magplus "title=" click to view original size picture "src=" ht

Basedao notice I put @transactional on the Basedao, because @transactional can inherit, so Userserviceimpl is not putWhen you start the server, you get an error: Caused By:java.lang.ClassCastException:java.lang.Class cannot is cast to Java.lang.reflect.ParameterizedTypeWhy is that?Test a half-day discovery, error on the Basedao on the note:@Transactional , the reason is not very clear!!!Two solutions:First, directly Basedao on the @transactional anno

1Severity: servlet/n002-1.0threw load () exception2 Java.lang.ClassCastException:com.sun.proxy. $Proxy cannot is cast to Com.bbk.n002.service.QuestionService3At Com.bbk.n002.servlet.CreateTaskQueueServlet.init (createtaskqueueservlet.java:28)4At Javax.servlet.GenericServlet.init (genericservlet.java:160)5At Org.apache.catalina.core.StandardWrapper.initServlet (standardwrapper.java:1280)6At Org.apache.catalina.core.StandardWrapper.loadServlet (standard

)); This.entityclass = (classRemove if test, or error,Java.lang.ClassCastException:java.lang.Class cannot is cast to Java.lang.reflect.ParameterizedType~ ~ ~ (>_The reason is because the paradigm is not used in the right way.Added specific DAO and implementation Public Interface extends Basedaoadvance {}@Repository Public class extends Implements Coursedao {}Test class@RunWith (Springjunit4classrunner.class) @ContextConfiguration (Location

Java.lang.ClassCastException:org.apache.cxf.transport.servlet.CXFServlet cannot is cast to Javax.servlet.ServletMaven under Web project dependency Servlet-api.jar1 Dependency>2 groupId>Javax.servletgroupId>3 Artifactid>Servlet-apiArtifactid>4 version>2.4version>5 Dependency>Forget it should be written to avoid conflicts with Tomcat built-in jar packages:1 Dependency>2 　　 groupId>Javax.servletgroupId>3 Artifactid>Servlet-apiArtifactid>4

This article refers to "in-depth understanding of computer systems" P31.First look at the following code: 12345 hexadecimal representation: 0x000030391#include 2 3 intMain ()4 {5 intA =12345;6 Char*q = (Char*) (a);7 for(inti =0; I sizeof (a); ++i)8printf"%.2x", Q[i]);9 return 0;Ten}The output is:The address of A is the int* type, whose object is 4 bytes of type int, 12345, when it is cast to the unsigned char* type q, since char is 1

[tomcat]. Standardhost[localhost]. Standardcontext[/book_shop]]At Org.apache.catalina.util.LifecycleBase.start (lifecyclebase.java:154)... 6 morecaused By:java.lang.ClassCastException:org.springframework.web.SpringServletContainerInitializer cannot be Cast to Javax.servlet.ServletContainerInitializerAt Org.apache.catalina.startup.ContextConfig.getServletContainerInitializer (contextconfig.java:1670)At Org.apache.catalina.startup.ContextConfig.getServl

When you use Spring AOP, you encounter the following error: Exception in thread "main" Java.lang.ClassCastException:com.sun.proxy. $Proxy 0 cannot is cast to Com.spring.test.setter.InstrumentalistAt Com.spring.test.setter.test.main (test.java:12) Reading the wrong message shows that the class generated by the dynamic agent cannot be converted to our custom implementation class.Workaround:Add proxy-target-class= "true" to the aop:config tag.