今天想把ssh整合的代码跑起来，控制台就一直在报错，搞了半天！！！

Hibernate:
select
computer0_.computerId as computer1_0_,
computer0_.computerName as computer2_0_,
computer0_.computerPrice as computer3_0_,
computer0_.computerType as computer4_0_
from
computer computer0_
java.lang.IllegalArgumentException: attempt to create saveOrUpdate event with null entity
at org.hibernate.event.spi.SaveOrUpdateEvent.<init>(SaveOrUpdateEvent.java:45)
at org.hibernate.event.spi.SaveOrUpdateEvent.<init>(SaveOrUpdateEvent.java:28)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:659)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:654)
at com.hgkj.model.dao.impl.ComputerDaoImpl.addSComputerDao(ComputerDaoImpl.java:40)
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:497)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
at com.sun.proxy.$Proxy40.addSComputerDao(Unknown Source)
at com.hgkj.model.service.impl.ComputerServiceImpl.addSComputeService(ComputerServiceImpl.java:27)
at com.hgkj.controler.action.ComputerAction.addComputer(ComputerAction.java:35)
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:497)
at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:899)
at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1544)
at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)
at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:98)
at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:90)
at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1620)
at ognl.ASTMethod.getValueBody(ASTMethod.java:91)
at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)
at ognl.SimpleNode.getValue(SimpleNode.java:258)
at ognl.Ognl.getValue(Ognl.java:470)
at ognl.Ognl.getValue(Ognl.java:434)
at com.opensymphony.xwork2.ognl.OgnlUtil$3.execute(OgnlUtil.java:401)
at com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecuteMethod(OgnlUtil.java:453)
at com.opensymphony.xwork2.ognl.OgnlUtil.callMethod(OgnlUtil.java:399)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:438)
at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:293)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:254)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:250)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:179)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:49)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.doIntercept(ConversionErrorInterceptor.java:142)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:137)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:137)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:201)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:67)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:133)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:89)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:101)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:142)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:160)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:175)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:99)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:121)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:167)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:203)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:196)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:249)
at org.apache.struts2.factory.StrutsActionProxy.execute(StrutsActionProxy.java:48)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:574)
at org.apache.struts2.dispatcher.ExecuteOperations.executeAction(ExecuteOperations.java:79)
at org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:141)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

这个问题出错的原因是你url的请求参数跟你Action里声明的对象的名字对不上。

例如我在ComputerAction.java文件里声明了一个对象

private Computer computer;
public Computer getComputer() {
    return computer;
}

public void setComputer(Computer computer) {
    this.computer = computer;
}

并且User类里面有id和name两个属性。

还有我的form表单是这样写的:

<form action="addComputer.action" method="post">
    商品名称：<input type="text" name="computerName" id="computerName"><br>
    商品价格：<input type="text" name="computerPrice" id="computerPrice"><br>
    商品名称：<input type="text" name="computerType" id="computerType"><br>
    ${message}
    <input type="submit" value="添加"><input type="reset" value="取消"><a href="showComputer.jsp"><input type="button" value="返回"></a>
</form>

问题就是出现在这里。
<form action="addComputer.action" method="post">
    商品名称：<input type="text" name="computer.computerName" id="computerName"><br>
    商品价格：<input type="text" name="computer.computerPrice" id="computerPrice"><br>
    商品名称：<input type="text" name="computer.computerType" id="computerType"><br>
    ${message}
    <input type="submit" value="添加"><input type="reset" value="取消"><a href="showComputer.jsp"><input type="button" value="返回"></a>
</form>

在name的值加上你在action定义的对象的名字(xxx.) ，就不会报错了！

希望能为解决你的问题提供参考，谢谢！

java.lang.IllegalArgumentException: attempt to create saveOrUpdate event with null entity的更多相关文章

  1. 错误信息:attempt to create saveOrUpdate event with null entity

    错误信息:attempt to create saveOrUpdate event with null entity; 这个错误网上答案比较多,我也不多说了. 我遇到的问题是在前台传过来的参数是nul ...

  2. 异常java.lang.IllegalArgumentException：attempt to create delete event with null entity

    异常java.lang.IllegalArgumentException:attempt to create delete event with null entity解决:路径问题,前台jsp和ja ...

  3. attempt to create delete event with null entity

    解决办法:删除之前判断是否为空 if(Object != null){ session.delete(Object); }

  4. org.springframework.dao.InvalidDataAccessApiUsageException: The given id must not be null!; nested exception is java.lang.IllegalArgumentException: The given id must not be null

    通过这个简单的案例,手把手教给你分析异常信息(适合初学者看) org.springframework.dao.InvalidDataAccessApiUsageException: The given ...

  5. webservice cxf error:java.lang.IllegalArgumentException: Argument(s) "type" can't be null.

    客户端请求DTO和服务器端的DTO定义不一样,客户端必须定义@XmlAccessorType和@XmlType,如: @XmlAccessorType(XmlAccessType.FIELD) @Xm ...

  6. 严重: End event threw exception java.lang.IllegalArgumentException: Can't convert argument: null

    堆栈信息: 2014-6-17 10:33:58 org.apache.tomcat.util.digester.Digester endElement 严重: End event threw exc ...

  7. 解决kylin报错：Failed to create dictionary on <db>.<table>, Caused by: java.lang.IllegalArgumentException: Too high cardinality is not suitable for dictionary

    报错信息: 2017-05-13 15:14:30,035 DEBUG [pool-9-thread-10] dict.DictionaryGenerator:94 : Dictionary clas ...

  8. SonarQube执行代码分析时，报错ERROR: Unable to create symbol table for : /**/*.java java.lang.IllegalArgumentException: Unsupported class file major version 55

    若要转载本文,请务必声明出处:https://www.cnblogs.com/zhongyuanzhao000/p/11686633.html 起因: 最近正在尝试SonarQube的简单使用,但是当 ...

  9. IDEA报错： Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder 'spring.datasource.url' in value "${spring.datasource.url}"

    运行审核流模块: 在ActivitiServiceApplication模块日志报错: Error starting ApplicationContext. To display the auto-c ...

随机推荐

  1. Person Re-identification 系列论文笔记（七）：PCB+RPP

    Beyond Part Models: Person Retrieval with Refined Part Pooling Sun Y, Zheng L, Yang Y, et al. Beyond ...

  2. Leetcode746.Min Cost Climbing Stairs使用最小花费爬楼梯

    数组的每个索引做为一个阶梯,第 i个阶梯对应着一个非负数的体力花费值 cost[i](索引从0开始). 每当你爬上一个阶梯你都要花费对应的体力花费值,然后你可以选择继续爬一个阶梯或者爬两个阶梯. 您需 ...

  3. 用dreamweaver查找页面位置

    复制页面的一段代码,然后用Dreamweaver在整个项目中查找代码. 找不到的原因:1.查找的内容是从数据库中读出来的.连数据库文件一起查便知. 2.查找的代码是某个函数生成的.

  4. UVA_401:Palindromes

    AC:Time(29ms)     C++ 4.8.2 #include<stdio.h> #include<string.h> char * mirstr = "A ...

  5. jQuery学习笔记之可见性过滤选择器

    可见性过滤选择器是根据元素的可见和不可见状态来选择相应的元素. 显示隐藏的例子: <!DOCTYPE html> <html> <head> <script ...

  6. oracle函数 LENGTHC(c1).LENGTH2(c1).LENGTH4(c1)

    [功能]返回字符串的长度; [说明]多字节符(汉字.全角符等),按1个字符计算 [参数]C1 字符串 [返回]数值型 [示例] SQL> select length('高乾竞'),length( ...

  7. HSV 和 HLS颜色空间

    颜色空间 颜色空间是特定的颜色组织:它提供了将颜色分类,并以数字图像表示的方法. RGB 是红绿蓝颜色空间.你可以将其视为 3D 空间,在这种情况下是立方体,其中任何颜色都可以用 R.G 和 B 值的 ...

  8. css半透明渐变过渡效果

    效果图: 代码如下: background-image: -webkit-gradient(linear,left top, left bottom,from(rgba(255,255,255,0)) ...

  9. 2-3-4 tree留坑

    #include<bits/stdc++.h> #define LL long long #define pii pair<int,int> #define mp make_p ...

  10. zoj 2338 The Towers of Hanoi Revisited

    The Towers of Hanoi Revisited Time Limit: 5 Seconds Memory Limit: 32768 KB Special Judge You all mus ...