有时，当我的批处理正在运行时，尝试使用这个简单的代码获得 JobParameters
<bean id="codiceParametroMaxDurataJob" class="java.lang.String"
scope="step">
<constructor-arg
value="#{jobParameters['job'].concat('_DURATA_MASSIMA_ESECUZIONE')}">
</constructor-arg>
</bean>
我得到以下异常
遇到执行步骤org.springframework.beans.factory.BeanCreationException的错误：创建类路径资源[StampeBatchDataLayer.xml]中定义的名为'scopedTarget.stepCheck'的bean时出错：bean的初始化失败;嵌套异常是org.springframework.beans.factory.BeanExpressionException：表达式解析失败;嵌套异常是org.springframework.expression.spel.SpelEvaluationException：EL1029E：（pos 55）：尝试在'java.lang.Class'类型的对象上执行方法'checkParametro'时出现问题：'问题调用方法：public static java.lang.String com.arca.stampebatch.datalayer.cache.CheckParametri.checkParametro（java.util.List，java.lang.String）在org.springframework.beans处抛出com.arca.danni.utils.exception.SpringBatchStopException' .factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:527）位于org.springframework.beans.factory.support.AbstractBeanFactory $ 2的org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456） . org.springframework.batch.core.scope.StepScope.get（StepScope.java:150）中的getObject（AbstractBeanFactory.java:332）org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:328）在org.springfram ework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）位于org.springframework.aop.framework.JdkDynamicAopProxy.invoke的org.springframework.aop.target.SimpleBeanTargetSource.getTarget（SimpleBeanTargetSource.java:33） JdkDynamicAopProxy.java:182）atg.springframework.batch.core.step.tasklet.TaskletStep $ ChunkTransactionCallback.doInTransaction（TaskletStep.java:386）位于org.springframework.transaction.support.TransactionTemplate的$ Proxy0.execute（未知来源） .execute（TransactionTemplate.java:130）org.springframework.batch.core.step.tasklet.TaskletStep $ 2.doInChunkContext（TaskletStep.java:264）org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration（在Org.springframework.batch.repeat.support.RepeatTemplate.getNextResult（RepeatTemplate.java:367）的org.springframework.batch.repeat.support.RepeatTemplate.executeInternal（RepeatTemplate.java:214）org中的StepContextRepeatCallback.java:76） .springframework.batch.repeat.support . 在org.springframework.batch.core.step.AbstractStep.execute（AbstractStep . ）的org.springframework.batch.core.step.tasklet.TaskletStep.doExecute（TaskletStep.java:250）上的RepeatTemplate.iterate（RepeatTemplate.java:143） . java：195）org.springframework.batch.core.job.SimpleStepHandler.handleStep（SimpleStepHandler.java:135）org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep（JobFlowExecutor.java:61）at org .springframework.batch.core.job.flow.support.state.StepState.handle（StepState.java:60）at org.springframework.batch.core.job.flow.support.SimpleFlow.resume（SimpleFlow.java:144） org.springframework.batch.core.job.flow.support.SimpleFlow.start（SimpleFlow.java:124）org.springframework.batch.core.job.flow.FlowJob.doExecute（FlowJob.java:135）at org .springframework.batch.core.job.AbstractJob.execute（AbstractJob.java:281）位于org.springframework.core的org.springframework.batch.core.launch.support.SimpleJobLauncher $ 1.run（SimpleJobLauncher.java:120） . task.SyncTaskExecutor.execu te（SyncTaskExecutor.java:48）org.springframework.batch.core.launch.support.SimpleJobLauncher.run（SimpleJobLauncher.java:114）at org.springframework.batch.core.launch.support.CommandLineJobRunner.start（CommandLineJobRunner . java：349）at org.springframework.batch.core.launch.support.CommandLineJobRunner.main（CommandLineJobRunner.java:574）引起：org.springframework.beans.factory.BeanExpressionException：表达式解析失败;嵌套异常是org.springframework.expression.spel.SpelEvaluationException：EL1029E：（pos 55）：尝试在'java.lang.Class'类型的对象上执行方法'checkParametro'时出现问题：'问题调用方法：public static java.lang.String com.arca.stampebatch.datalayer.cache.CheckParametri.checkParametro（java.util.List，java.lang.String）抛出com.arca.danni.utils.exception.SpringBatchStopException'at atorg.springframework.context.expression.StandardBeanExpressionResolver.evaluate（StandardBeanExpressionResolver.java:142）位于org.springframework.beans.factory.support的org.springframework.beans.factory.support.AbstractBeanFactory.evaluateBeanDefinitionString（AbstractBeanFactory.java:1299） . BeanDefinitionValueResolver.evaluate（BeanDefinitionValueResolver.java:210）在org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary（BeanDefinitionValueResolver.java:182）在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues（AbstractAutowireCapableBeanFactory.java： 1360）org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean（AbstractAutowireCapableBeanFactory.java:1118）org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:517）... 29更多原因by：org.springframework.expression.spel.SpelEvaluationExce ption：EL1029E：（pos 55）：尝试在'java.lang.Class'类型的对象上执行方法'checkParametro'时出现问题：'问题调用方法：public static java.lang.String com.arca.stampebatch . datalayer.cache.CheckParametri.checkParametro（java.util.List，java.lang.String）在org.springframework.expression.spel.ast.MethodReference.getValueInternal（MethodReference . ）中抛出com.arca.danni.utils.exception.SpringBatchStopException' . java：114）org.springframework上的org.springframework.expression.spel.ast.CompoundExpression.getValueInternal（CompoundExpression.java:57）org.springframework.expression.spel.ast.SpelNodeImpl.getValue（SpelNodeImpl.java:93） .expression.spel.standard.SpelExpression.getValue（SpelExpression.java:88）at org.springframework.context.expression.StandardBeanExpressionResolver.evaluate（StandardBeanExpressionResolver.java:139）... 35更多引起：org.springframework.expression . AccessException：问题调用方法：public static java.lang.String com.arca . stampebatch.datalayer.cache.CheckParametri.checkParametro（java.util.List，java.lang.String）在org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute抛出com.arca.danni.utils.exception.SpringBatchStopException（ReflectiveMethodExecutor） .java：73）at org.springframework.expression.spel.ast.MethodReference.getValueInternal（MethodReference.java:109）... 39更多引起：org.springframework.beans.factory.BeanExpressionException：表达式解析失败;嵌套异常是org.springframework.beans.NotReadablePropertyException：bean类的无效属性'jobParameters'[org.springframework.batch.core.scope.context.StepContext]：Bean属性'jobParameters'不可读或具有无效的getter方法： getter的返回类型是否与setter的参数类型匹配？ org.springframework.context.expression.StandardBeanExpressionResolver.evaluate（StandardBeanExpressionResolver.java:142）org.springframework.beans.factory.support.AbstractBeanFactory.evaluateBeanDefinitionString（AbstractBeanFactory.java:1299）org.springframework.beans.factory.support位于org.springframework.beans.factory.support.ConstructorResolver.resolveConstructorArguments（ConstructorResolver.java）的org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:182）中的.BeanDefinitionValueResolver.evaluate（BeanDefinitionValueResolver.java:210） ：630）org.springframework上的org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:148）org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor（AbstractAutowireCapableBeanFactory.java:1035） . beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance（AbstractAutowi reCapableBeanFactory.java:939）org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:485）org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456）at org .springframework.beans.factory.support.AbstractBeanFactory $ 2.getObject（AbstractBeanFactory.java:332）位于org.springframework.beans.factory的org.springframework.batch.core.scope.StepScope.get（StepScope.java:150） . support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:328）at atorg.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）位于org.springframework.aop.frame.JdkDynamicAopProxy的org.springframework.aop.target.SimpleBeanTargetSource.getTarget（SimpleBeanTargetSource.java:33） . 在org.springframework.core.convert.ConversionFailedException调用（JdkDynamicAopProxy.java:182）在$ Proxy19.toString（来源不明）在org.springframework.util.ObjectUtils.nullSafeToString（ObjectUtils.java:610）（ConversionFailedException.java： 46）在org.springframework.core.convert.support.ConversionUtils.invokeConverter（ConversionUtils.java:41）在org.springframework.core.convert.support.GenericConversionService.convert（GenericConversionService.java:171）在org.springframework.expression .spel.support.StandardTypeConverter.convertValue（StandardTypeConverter.java:66）在org.springframework.expression.spel.support.ReflectionHelper.convertArguments（ReflectionHelper.java:281）在org.springframework.expression.spel.support.ReflectiveMeth org.springframework.beans.NotReadablePropertyException：odExecutor.execute（ReflectiveMethodExecutor.java:61）... 40更致bean类的无效的属性 'jobParameters'[org.springframework.batch.core.scope.context.StepContext]： Bean属性'jobParameters'不可读或具有无效的getter方法：getter的返回类型是否与setter的参数类型匹配？ org.springframework.beans.BeanWrapperImpl.getPropertyValue（BeanWrapperImpl.java:729）org.springframework.beans.BeanWrapperImpl.getPropertyValue（BeanWrapperImpl.java:721）at org.springframework.batch.core.scope.StepScope.resolveContextualObject（StepScope）的.java：131）在org.springframework.beans.factory.config.BeanExpressionContext.containsObject（BeanExpressionContext.java:51）在org.springframework.context.expression.BeanExpressionContextAccessor.canRead（BeanExpressionContextAccessor.java:36）在org.springframework . expression.spel.ast.PropertyOrFieldReference.readProperty在org.springframework.expression.spel.ast.CompoundExpression（PropertyOrFieldReference.java:190）在org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal（PropertyOrFieldReference.java:72） . getgalueInternal（CompoundExpression.java：52）org.springframework.expression.spel.ast.SpelNodeImpl.getValue（SpelNodeImpl.java：93）org.springframework.expression.spel.standard.SpelExpression.getValu e（SpelExpression.java:88）org.springframework.context.expression.StandardBeanExpressionResolver.evaluate（StandardBeanExpressionResolver.java:139）... 63更多
抛出异常时，我尝试重新启动批处理，结果正常 .
为什么，在第二次运行和紧接第一次运行之后，是否会抛出异常？
我正在使用Spring Batch 2.1.8.RELEASE和IBM JDK 1.7
我该如何解决这个问题？谢谢 .