java - Univocity - 自动配置不适用于 MultiBeanListProcessor

Question

当我实例化 FixedWidthParser 时与 MultiBeanListProcessor CommonParserSettings#configureFromAnnotations(beanClass)没有被调用，因为它不是 AbstractBeanProcessor 的实例。不应该为每个 AbstractProcessorBean 调用该方法吗？在 MultiBeanListProcessor ？

示例代码:

FixedWidthParserSettings settings = new FixedWidthParserSettings();
settings.setAutoConfigurationEnabled(true);
settings.setHeaderExtractionEnabled(false);
settings.getFormat().setLineSeparator("\n");

MultiBeanListProcessor processor = new MultiBeanListProcessor(FileHeader.class, ...);   // FileHeader has an @Headers and fields with @Parsed
settings.setProcessor(processor);

FixedWidthParser parser = new FixedWidthParser(settings);     // Here it should call configureFromAnnotations

try (Reader reader = getReader("/positional-file")) {

    parser.parse(reader);   // the exception is throwed here

} catch (IOException e) {
    e.printStackTrace();
}

这是该 bean 的缩写版本:

import com.univocity.parsers.annotations.FixedWidth;
import com.univocity.parsers.annotations.Headers;
import com.univocity.parsers.annotations.Parsed;
import com.univocity.parsers.fixed.FieldAlignment;

@Headers(sequence = { "bankCode", "batchCode", "registerType" }, extract = false, write = false)
public class FileHeader {

    @Parsed
    @FixedWidth(value = 3, alignment = FieldAlignment.RIGHT, padding = '0')
    private Integer bankCode;

    @Parsed
    @FixedWidth(value = 4, alignment = FieldAlignment.RIGHT, padding = '0')
    private Integer batchCode;

    @Parsed
    @FixedWidth(value = 1, alignment = FieldAlignment.RIGHT, padding = '0')
    private Integer registerType;`

     /** getters and setters  */
}

异常(exception):

com.univocity.parsers.common.DataProcessingException: Could not find fields [bankCode, bankName, batchCode] in input. Please enable header extraction in the parser settings in order to match field names.
Internal state when error was thrown: line=0, column=0, record=1, charIndex=240
    at com.univocity.parsers.common.processor.core.BeanConversionProcessor.mapFieldIndexes(BeanConversionProcessor.java:360)
    at com.univocity.parsers.common.processor.core.BeanConversionProcessor.mapValuesToFields(BeanConversionProcessor.java:289)
    at com.univocity.parsers.common.processor.core.BeanConversionProcessor.createBean(BeanConversionProcessor.java:457)
    at com.univocity.parsers.common.processor.core.AbstractBeanProcessor.rowProcessed(AbstractBeanProcessor.java:51)
    at com.univocity.parsers.common.processor.core.AbstractMultiBeanProcessor.rowProcessed(AbstractMultiBeanProcessor.java:101)
    at com.univocity.parsers.common.Internal.process(Internal.java:21)
    at com.univocity.parsers.common.AbstractParser.rowProcessed(AbstractParser.java:596)
    at com.univocity.parsers.common.AbstractParser.parse(AbstractParser.java:132)

context.headers()的值在BeanConversionProcessor.mapFieldIndexes为空。

还有其他方法可以使用 MultiBeanListProcessor与 AutoConfiguration来自@Headers ？

PS:如果我更改 MultiBeanListProcessor(FileHeader.class) 就可以了对于BeanListProcessor(FileHeader.class) .

Answer 1

在 2.4.2 版本中修复。 SNAPSHOT 构建已修复此问题，目前可通过 Maven 或直接从 here 获得。 .

希望这有帮助