【发布时间】:2016-03-29 14:24:20
【问题描述】:
当末尾有不属于 .csv 数据的行时,Univocity 解析器如何正确读取 .csv 文件的数据?
文件末尾的注释被解析为 .csv 数据。
代码和堆栈跟踪如下。
任何帮助将不胜感激。
import com.univocity.parsers.csv.CsvParserSettings;
import com.univocity.parsers.common.processor.*;
import com.univocity.parsers.csv.*;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.lang.IllegalStateException;
import java.lang.String;
import java.util.List;
public class UnivocityParsers {
public Reader getReader(String relativePath) {
try {
return new InputStreamReader(this.getClass().getResourceAsStream(relativePath), "Windows-1252");
} catch (UnsupportedEncodingException e) {
throw new IllegalStateException("Unable to read input", e);
}
}
public void columnSelection() {
RowListProcessor rowProcessor = new RowListProcessor();
CsvParserSettings parserSettings = new CsvParserSettings();
parserSettings.setRowProcessor(rowProcessor);
parserSettings.setHeaderExtractionEnabled(true);
parserSettings.setLineSeparatorDetectionEnabled(true);
parserSettings.setSkipEmptyLines(true);
// Here we select only the columns "Price", "Year" and "Make".
// The parser just skips the other fields
parserSettings.selectFields("AUTHOR", "ISBN");
CsvParser parser = new CsvParser(parserSettings);
parser.parse(getReader("list2.csv"));
List<String[]> rows = rowProcessor.getRows();
String[] strings = rows.get(0);
System.out.print(strings[0]);
}
public static void main(String arg[]) {
UnivocityParsers univocityParsers = new UnivocityParsers();
univocityParsers.columnSelection();
}
}
这是正在解析的文件:
List of books by Author - Created today
"REVIEW_DATE","AUTHOR","ISBN","DISCOUNTED_PRICE"
"1985/01/21","Douglas Adams",0345391802,5.95
"1990/01/12","Douglas Hofstadter",0465026567,9.95
"1998/07/15","Timothy ""The Parser"" Campbell",0968411304,18.99
"1999/12/03","Richard Friedman",0060630353,5.95
"2001/09/19","Karen Armstrong",0345384563,9.95
"2002/06/23","David Jones",0198504691,9.95
"2002/06/23","Julian Jaynes",0618057072,12.50
"2003/09/30","Scott Adams",0740721909,4.95
"2004/10/04","Benjamin Radcliff",0804818088,4.95
"2004/10/04","Randel Helms",0879755725,4.50
**This is the top author list.
【问题讨论】:
-
您提到了堆栈跟踪,但我没有看到。你刚才说的是文件吗?最后一行在解析后的样子是什么?