Univocity

Question

当我用 MultiBeanListProcessor 实例化 FixedWidthParser 时，不会调用 CommonParserSettings#configureFromAnnotations(beanClass)，因为它不是 AbstractBeanProcessor 的实例。不应该为 MultiBeanListProcessor 中的每个 AbstractProcessorBean 调用该方法吗？

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 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：

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)

BeanConversionProcessor.mapFieldIndexes 处 context.headers() 的值为空。

是否有任何其他方法可以将 MultiBeanListProcessor 与 @Headers 中的 AutoConfiguration 一起使用？

P.S.: 如果我将 MultiBeanListProcessor(FileHeader.class) 更改为 BeanListProcessor(FileHeader.class).

，它会起作用

Answer 1

将在 2.4.2 版本中修复。 SNAPSHOT 构建已经修复了此问题，目前可通过 Maven 或直接从 here.

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希望对您有所帮助

Univocity - AutomaticConfiguration 不适用于 MultiBeanListProcessor

Univocity - AutomaticConfiguration do not work with MultiBeanListProcessor

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