如何解决java.lang.ClassNotFoundException：org.springframework.batch.classify.BackToBackPatternClassifier

Question

我得到错误在Title中使用ClassifierCompositItemWriter使用以下作业配置文件中声明。为什么没有找到BackToBackPatternClassifier？我真的很陌生。

我使用 - 春天核心版本3.2.2.RELEASE - Spring Batch的版本2.2.0.RELEASE

<bean id="domain" class="com.my.OneData" /> 

<job id="readAsString" xmlns="http://www.springframework.org/schema/batch"> 
    <step id="step1"> 
     <tasklet> 
      <chunk reader="theItemReader" writer="compositeWriter" 
       commit-interval="1" /> 
     </tasklet> 
    </step> 
</job> 

<bean id="theItemReader" class="org.springframework.batch.item.file.FlatFileItemReader"> 
    <property name="resource" value="file:csv/inputs/ad_usage_sample.csv" /> 
    <property name="linesToSkip" value="1"></property> 
    <property name="lineMapper"> 
     <bean 
      class="org.springframework.batch.item.file.mapping.PassThroughLineMapper"> 
     </bean> 
    </property> 
</bean> 

<bean id="compositeWriter" 
    class="org.springframework.batch.item.support.ClassifierCompositeItemWriter"> 
    <property name="classifier"> 
     <bean 
      class="org.springframework.batch.classify.BackToBackPatternClassifier"> 
      <property name="routerDelegate"> 
       <bean class="com.my.LineClassifier" /> 
      </property> 
      <property name="matcherMap"> 
       <map> 
        <entry key="abc" value-ref="fileItemWriter1" /> 
        <entry key="xyz" value-ref="fileItemWriter2" /> 
       </map> 
      </property> 
     </bean> 
    </property> 
</bean> 

<bean id="fileItemWriter1" class="org.springframework.batch.item.file.FlatFileItemWriter"> 
    <property name="resource" value="file:csv/outputs/oneLouderOutput3.csv" /> 
    <property name="appendAllowed" value="true" /> 
    <property name="lineAggregator"> 
     <bean 
    class="org.springframework.batch.item.file.transform.DelimitedLineAggregator"> 
      <property name="delimiter" value="," /> 
     </bean> 
    </property> 
</bean> 

<bean id="fileItemWriter2" class="org.springframework.batch.item.file.FlatFileItemWriter"> 
    <property name="resource" value="file:csv/outputs/oneLouderOutput3.csv" /> 
    <property name="appendAllowed" value="true" /> 
    <property name="lineAggregator"> 
     <bean 
    class="org.springframework.batch.item.file.transform.DelimitedLineAggregator"> 
      <property name="delimiter" value="," /> 
     </bean> 
    </property> 
</bean> 

Answer 1

BackToBackPatternClassifier（和Classifier）是定义为spring-retry模块，并且可能需要将其jar包含在classpath中（我现在无法检查，但最新版本是spring-retry-1.0.2.RELEASE）

Answer 2

我只是有一个类似的问题，我发现我不得不把分类的包从

org.springframework.batch.classify.BackToBackPatternClassifier 

改变

org.springframework.classify.BackToBackPatternClassifier 

即删除一批

我也是使用spring-retry-1.0.3.RELEASE.jar