The basic meaning of an "If" statement is If something is true then do an action (otherwise do a different action) The second part of the statement (in parentheses) is optional. Otherwise, the system just goes to the next line in the batch file if the first condition isn't met. The...
If exist somefile.ext do_something Following is an example of how the if exists statement can be used.Example@echo off if exist C:\set2.txt echo "File exists" if exist C:\set3.txt (echo "File exists") else (echo "File does not exist") ...
After running a command in a batch file, an if statement of the form if errorlevel number command will execute the command if the previous program's exit status value is the listed number or higher. For example, the net use command returns 0 if it is able to map a drive letter to ...
<bean id="reader"class="org.springframework.batch.item.file.FlatFileItemReader"> <property name="resource"value="data/User.txt"></property> <!--将一条记录转换为java对象,一般使用LineTokenizer和FieldSetMapper组合来实现,默认DefaultLineMapper--> ...
因为有这些可能性, FlatFileItemWriter 有一个属性 shouldDeleteIfExists 。将这个属性设置为 true , 打开 writer 时会将已有的同名文件删除。 1.7 XML Item Readers and Writers Spring Batch为读取XML映射为Java对象以及将Java对象写为XML记录提供了事务基础。 [注意]XML流的限制 StAX API 被用在其他XML解析...
@Override public void afterJob(JobExecution jobExecution) { if (jobExecution.getStatus() == BatchStatus.COMPLETED) { // Log statement System.out.println("BATCH JOB COMPLETED SUCCESSFULLY"); } } 现在,让我们来看看ItemWriter。这个bean基本上使用JdbcBatchItemWriter。JdbcBatchItemWriter使用INSERT sql 语句...
Your Account Summary Statement Period:<BEGIN_DATE> to <END_DATE> 其中,开始日期是上个月的第一个日历日期,结束日期是上个月的最后一个日历日期。 在摘要标题之后,每种证券类型(证券和现金)将有一个单独的行项目,以及该账户的当前价值。 在每一个明细项目之后,将打印一个总的账户值。以下是该部分的一个示...
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if (!deleted) { throw new UnexpectedJobExecutionException("Could not delete file " + files[i].getPath()); } } return RepeatStatus.FINISHED; } public void setDirectoryResource(Resource directory) { this.directory = directory; } public void afterPropertiesSet() throws Exception { ...
3. Check If a File Exists Another useful situation where an IF statement in a batch file is to check for the existence of a data file. A lot of times, the batch job is just a monitoring tool that you can schedule to check for new incoming data files in a specific directory. Then, ...