Spring批处理：输入资源不存在类路径资源答案

【问题标题】：Spring batch: Input resource does not exist class path resourceSpring批处理：输入资源不存在类路径资源
【发布时间】：2020-03-04 18:00:46
【问题描述】：

我目前正在开发一个 Spring Batch，它在第一步将 Excel (.xsls) 文件转换为 CSV，然后读取 CSV，对其进行处理并将其数据存储在数据库中。第一步效果很好。批处理在第二步停止并抛出此警告：Input resource does not exist class path resource [C:/work/referentielAgenceCE.csv]。在我的代码之后：

spring-config.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:batch="http://www.springframework.org/schema/batch"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
    http://www.springframework.org/schema/batch
    http://www.springframework.org/schema/batch/spring-batch-2.1.xsd">

    <!-- import config Spring générale -->
    <import resource="classpath*:spring/***-batch-spring.xml" />

    <bean id="pathFichier" class="java.lang.String">
        <constructor-arg value="${batch.referentielAgenceCE.inputFilePathCSV}" />
    </bean>

    <batch:job id="simpleFileImportJob" xmlns="http://www.springframework.org/schema/batch">
        <batch:step id="convertStep" next="processingStep">
            <batch:tasklet ref="convert"/>
        </batch:step>
        <batch:step id="processingStep">
            <batch:tasklet>
                <batch:chunk reader="agenceCEReader" processor="agenceCEProcessor" writer="agenceCEWriter" 
                    commit-interval="5" />              
            </batch:tasklet>
        </batch:step>
    </batch:job>

    <bean id="convert"
        class="com.***.referentielAgenceCE.convertTasklet.convertXLSXtoCVS" />

    <!-- Reader -->
    <bean id="agenceCEReader" scope="step"
        class="org.springframework.batch.item.file.FlatFileItemReader">     
        <property name="strict" value="false" />
        <property name="resource" ref="pathFichier" />
        <property name="linesToSkip" value="1" />
        <property name="lineMapper">
            <bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
                <property name="lineTokenizer">
                    <bean
                        class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
                        <property name="delimiter" value=";" />
                        <property name="names"
                            value="Date Création,Date Dernière modif.,Date Début Validité,Date Fin Validité,Caisse,Identifiant Agence,Libellé Agence,Type Agence,Libellé Type Agence,Téléphone,Fax,2EME Ligne Adresse,3EME Ligne Adresse,4EME Ligne Adresse,5EME Ligne Adresse,6EME Ligne Adresse,Pays,Ville,Identifiant Niv. 1,Type Niv. 1,Libellé Niv. 1,Identifiant Niv. 2,Type Niv. 2,Libellé Niv. 2,Identifiant Niv. 3,Type Niv. 3,Libellé Niv. 3,Identifiant Niv. 4,Type Niv. 4,Libellé Niv. 4,Identifiant Niv. 5,Type Niv. 5,Libellé Niv. 5,Identifiant Niv. 6,Type Niv. 6,Libellé Niv. 6,Identifiant Niv. 7,Type Niv. 7,Libellé Niv. 7,Identifiant Niv. 8,Type Niv. 8,Libellé Niv. 8,Identifiant Niv. 9,Type Niv. 9,Libellé Niv. 9,Identifiant Niv. 10,Type Niv. 10,Libellé Niv. 10,Identifiant Niv. 11,Type Niv. 11,Libellé Niv. 11,Identifiant Niv. 12,Type Niv. 12,Libellé Niv. 12,Identifiant Niv. 13,Type Niv. 13,Libellé Niv. 13,Identifiant Niv. 14,Type Niv. 14,Libellé Niv. 14,Jours/Heures Ouverture,Code Etat" />
                    </bean>
                </property>
                <property name="fieldSetMapper">
                    <bean
                        class="com.***.referentielAgenceCE.mapping.AgenceCEFieldSetMapper" />
                </property>
            </bean>
        </property>
    </bean>

    <!-- Processor -->
    <bean id="agenceCEProcessor" 
        class="com.***.referentielAgenceCE.processor.AgenceCEItemProcessor"/>

    <!-- Writer -->
    <bean id="agenceCEWriter"
        class="com.***.referentielAgenceCE.writer.AgenceCEItemWriter" />
</beans>

第 1 步 - 将 XLSX 转换为 CVS.java：

public class convertXLSXtoCVS implements Tasklet, InitializingBean{


    @Value("${batch.referentielAgenceCE.inputFilePathXLSX}")
    private String inputFile;

    @Override
    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext)
            throws Exception {
        System.out.println("convertXLSXtoCVS.execute1");
        // For storing data into CSV files                
        StringBuffer data = new StringBuffer();                
        try {
            File outputFile = new File(getOutputFile(inputFile));
            FileWriter fw = new FileWriter(outputFile.getPath());

            BufferedWriter  fos = new BufferedWriter(fw);

            // Get the workbook object for XLSX file
            XSSFWorkbook wBook = new XSSFWorkbook(new FileInputStream(inputFile));

            // Get first sheet from the workbook
            XSSFSheet sheet = wBook.getSheetAt(0);
            Row row;
            Cell cell;

            // Iterate through each rows from first sheet
            Iterator<Row> rowIterator = sheet.iterator();
            while (rowIterator.hasNext()) {
                row = rowIterator.next();
                // For each row, iterate through each columns
                Iterator<Cell> cellIterator = row.cellIterator();
                while (cellIterator.hasNext()) {
                    cell = cellIterator.next();
                    switch (cell.getCellType()) {
                        case Cell.CELL_TYPE_BOOLEAN:                                                
                            data.append(cell.getBooleanCellValue() + ",");                                                
                            break;                                        
                        case Cell.CELL_TYPE_NUMERIC:                                                
                            data.append(cell.getNumericCellValue() + ",");                                                
                            break;                                        
                        case Cell.CELL_TYPE_STRING:                                                
                            data.append(cell.getStringCellValue() + ",");                                                
                            break;                                        
                        case Cell.CELL_TYPE_BLANK:                                                
                            data.append("" + ",");                                                
                            break;
                        default:                                                
                            data.append(cell + ",");
                    }
                }
            }
            fos.write(data.toString());
            fos.close();
        }catch (Exception ioe) {
            ioe.printStackTrace();
        }
        return RepeatStatus.FINISHED;
    }

    @Override
    public void afterPropertiesSet() throws Exception {
        Assert.notNull(inputFile, "inputFile must be set");

    }

    public String getOutputFile(String inputFile){
        String[] parts = inputFile.split("\\.");
        return parts[0]+"."+parts[1].replace("xlsx", "csv");
    }

}

我在属性文件中提到的文件路径如下：

batch.referentielAgenceCE.inputFilePathXLSX=C\:\\work\\referentielAgenceCE.xlsx
batch.referentielAgenceCE.inputFilePathCSV=C\:\\work\\referentielAgenceCE.csv

当我从阅读器定义中的 spring-config.xml 中删除时，我收到以下错误：

org.springframework.batch.item.ItemStreamException: Failed to initialize the reader
    at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.open(AbstractItemCountingItemStreamItemReader.java:137)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)
    at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
    at $Proxy44.open(Unknown Source)
    at org.springframework.batch.item.support.CompositeItemStream.open(CompositeItemStream.java:93)
    at org.springframework.batch.core.step.tasklet.TaskletStep.open(TaskletStep.java:301)
    at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:192)
    at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:135)
    at 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)
    at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:124)
    at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:135)
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:281)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:120)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:48)
    at 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)
Caused by: java.lang.IllegalStateException: Input resource must exist (reader is in 'strict' mode): URL [file://work//referentielAgenceCE.csv]
    at org.springframework.batch.item.file.FlatFileItemReader.doOpen(FlatFileItemReader.java:250)
    at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.open(AbstractItemCountingItemStreamItemReader.java:134)
    ... 27 more

【问题讨论】：

标签： java csv spring-batch

【解决方案1】：

我找到了解决方案。我应该在输出 cvs 文件路径中添加 'file:'。所以应该是这样的：

batch.referentielAgenceCE.inputFilePathCSV=file\:C\:\\work\\referentielAgenceCE.csv instead of C\:\\work\\referentielAgenceCE.csv

【讨论】：

【解决方案2】：

看到：

Caused by: java.lang.IllegalStateException: Input resource must exist (reader is in 'strict' mode): URL [file://work//referentielAgenceCE.csv]

更准确地说：

file://work//referentielAgenceCE.csv

我认为你需要更换：

batch.referentielAgenceCE.inputFilePathXLSX=C\:\\work\\referentielAgenceCE.xlsx
batch.referentielAgenceCE.inputFilePathCSV=C\:\\work\\referentielAgenceCE.csv

由

batch.referentielAgenceCE.inputFilePathXLSX=C:\\work\\referentielAgenceCE.xlsx
batch.referentielAgenceCE.inputFilePathCSV=C:\\work\\referentielAgenceCE.csv

【讨论】：

@NabilSalah 尝试在驱动程序字母前使用file: (file:C:\\work\\referentielAgenceCE.xlsx)
这次最糟糕的是返回以下错误：file:C:\\work\\referentielAgenceCE.xlsx 不存在
@NabilSalah 您可以尝试使用斜杠而不是反斜杠吗？ C:/work/referentielAgenceCE.xlsx
仍然是第一个警告：WARN |输入资源不存在类路径资源 [C:/work/referentielAgenceCE.csv]。我认为这不是由于文件路径。
调试后我注意到文件是在第二步开始的同时创建的（我们读取 CSV 的步骤）。不知道有没有办法在这两个步骤之间打断？