一旦发生错误,csv 到 bean 对象的 UNIVOCITY-PARSERS 就会停止
UNIVOCITY-PARSERS for csv to bean object stopping as soon as error has occured
我正在使用 UNIVOCITY-PARSERS 将 csv 文件行转换为 java 个对象。
在处理文件时,如果它在行中的任何列遇到任何问题,那么它会在该行停止解析并抛出异常。但我需要一些东西,只要跳过有错误的行,它就会一直持续到文件末尾。但是我在 api.
中没有任何实用程序 classes
我的豆子class
public class ItemcodeBean {
@Trim
@NullString(nulls = { " ", "" })
@Parsed(field = "ItemCode")
private String itemCode;
@Trim
@NullString(nulls = { " ", "" })
@Parsed(field = "PartNumber")
private String partNumber;
@Trim
@NullString(nulls = { " ", "" })
@Parsed(field = "ModelNumber")
private String modelNumber;
}
我的主Class
public class TestClass {
private BeanListProcessor<ItemcodeBean>
rowProcessor = null;
private CsvParser parser = null;
public static void main(String[] args) {
TestClass testClass = new TestClass();
testClass.init();
try{
ItemcodeBean itemcodeBean;
while ((itemcodeBean = testClass.getRowData()) != null){
System.out.println(itemcodeBean.toString());
}
}catch (Throwable ex){
System.out.println(ex.getLocalizedMessage());
}
}
private BeanListProcessor<ItemcodeBean> init() {
// BeanListProcessor converts each parsed row to an instance of a given class, then stores each instance into a list.
this.rowProcessor =
new BeanListProcessor<ItemcodeBean>(ItemcodeBean.class);
CsvParserSettings parserSettings = new CsvParserSettings();
parserSettings.setProcessor(rowProcessor);
parserSettings.setHeaderExtractionEnabled(true);
// skip leading whitespaces
parserSettings.setIgnoreLeadingWhitespaces(true);
//skip trailing whitespaces
parserSettings.setIgnoreTrailingWhitespaces(true);
//skip empty lines
parserSettings.setSkipEmptyLines(true);
File file = new File("C:\Users\abhishyam.c\Downloads\Itemcode_Template.csv");
this.parser = new CsvParser(parserSettings);
//parser.parse(file);
parser.beginParsing(file);
return rowProcessor;
}
private ItemcodeBean getRowData() throws Throwable {
String[] row;
try {
while ((row = parser.parseNext()) != null){
return rowProcessor.createBean(row, parser.getContext());
}
}catch (DataProcessingException e){
throw new DataProcessingException(e.getColumnName(),e);
}
// parser.stopParsing();
return null;
}
}
只需使用一个错误处理程序,它将继续运行,除非您自己抛出异常:
//Let's set a RowProcessorErrorHandler to log the error. The parser will keep running.
settings.setProcessorErrorHandler(new RowProcessorErrorHandler() {
@Override
public void handleError(DataProcessingException error, Object[] inputRow, ParsingContext context) {
println(out, "Error processing row: " + Arrays.toString(inputRow));
println(out, "Error details: column '" + error.getColumnName() + "' (index " + error.getColumnIndex() + ") has value '" + inputRow[error.getColumnIndex()] + "'");
}
});
更新:您可以使用 RetryableErrorHandler 来防止该行被丢弃。这是2.3.0版本新增的特殊实现,允许用户调用方法setDefaultValue()
给有问题的列赋值,调用方法keepRecord
防止记录被丢弃。
示例:
settings.setProcessorErrorHandler(new RetryableErrorHandler<ParsingContext>() {
@Override
public void handleError(DataProcessingException error, Object[] inputRow, ParsingContext context) {
//if there's an error in the first column, assign 50 and proceed with the record.
if (error.getColumnIndex() == 0) {
setDefaultValue(50);
} else { //else keep the record anyway. Null will be used instead.
keepRecord();
}
}
});
请注意,如果error.getColumnIndex()
returns -1,则无法保存记录,无论如何都会跳过。您可以使用它来记录错误详细信息。
我正在使用 UNIVOCITY-PARSERS 将 csv 文件行转换为 java 个对象。
在处理文件时,如果它在行中的任何列遇到任何问题,那么它会在该行停止解析并抛出异常。但我需要一些东西,只要跳过有错误的行,它就会一直持续到文件末尾。但是我在 api.
中没有任何实用程序 classes我的豆子class
public class ItemcodeBean {
@Trim
@NullString(nulls = { " ", "" })
@Parsed(field = "ItemCode")
private String itemCode;
@Trim
@NullString(nulls = { " ", "" })
@Parsed(field = "PartNumber")
private String partNumber;
@Trim
@NullString(nulls = { " ", "" })
@Parsed(field = "ModelNumber")
private String modelNumber;
}
我的主Class
public class TestClass {
private BeanListProcessor<ItemcodeBean>
rowProcessor = null;
private CsvParser parser = null;
public static void main(String[] args) {
TestClass testClass = new TestClass();
testClass.init();
try{
ItemcodeBean itemcodeBean;
while ((itemcodeBean = testClass.getRowData()) != null){
System.out.println(itemcodeBean.toString());
}
}catch (Throwable ex){
System.out.println(ex.getLocalizedMessage());
}
}
private BeanListProcessor<ItemcodeBean> init() {
// BeanListProcessor converts each parsed row to an instance of a given class, then stores each instance into a list.
this.rowProcessor =
new BeanListProcessor<ItemcodeBean>(ItemcodeBean.class);
CsvParserSettings parserSettings = new CsvParserSettings();
parserSettings.setProcessor(rowProcessor);
parserSettings.setHeaderExtractionEnabled(true);
// skip leading whitespaces
parserSettings.setIgnoreLeadingWhitespaces(true);
//skip trailing whitespaces
parserSettings.setIgnoreTrailingWhitespaces(true);
//skip empty lines
parserSettings.setSkipEmptyLines(true);
File file = new File("C:\Users\abhishyam.c\Downloads\Itemcode_Template.csv");
this.parser = new CsvParser(parserSettings);
//parser.parse(file);
parser.beginParsing(file);
return rowProcessor;
}
private ItemcodeBean getRowData() throws Throwable {
String[] row;
try {
while ((row = parser.parseNext()) != null){
return rowProcessor.createBean(row, parser.getContext());
}
}catch (DataProcessingException e){
throw new DataProcessingException(e.getColumnName(),e);
}
// parser.stopParsing();
return null;
}
}
只需使用一个错误处理程序,它将继续运行,除非您自己抛出异常:
//Let's set a RowProcessorErrorHandler to log the error. The parser will keep running.
settings.setProcessorErrorHandler(new RowProcessorErrorHandler() {
@Override
public void handleError(DataProcessingException error, Object[] inputRow, ParsingContext context) {
println(out, "Error processing row: " + Arrays.toString(inputRow));
println(out, "Error details: column '" + error.getColumnName() + "' (index " + error.getColumnIndex() + ") has value '" + inputRow[error.getColumnIndex()] + "'");
}
});
更新:您可以使用 RetryableErrorHandler 来防止该行被丢弃。这是2.3.0版本新增的特殊实现,允许用户调用方法setDefaultValue()
给有问题的列赋值,调用方法keepRecord
防止记录被丢弃。
示例:
settings.setProcessorErrorHandler(new RetryableErrorHandler<ParsingContext>() {
@Override
public void handleError(DataProcessingException error, Object[] inputRow, ParsingContext context) {
//if there's an error in the first column, assign 50 and proceed with the record.
if (error.getColumnIndex() == 0) {
setDefaultValue(50);
} else { //else keep the record anyway. Null will be used instead.
keepRecord();
}
}
});
请注意,如果error.getColumnIndex()
returns -1,则无法保存记录,无论如何都会跳过。您可以使用它来记录错误详细信息。