Question

我正在尝试使用openCSV将CSV文件中的所有行转换为java bean。每个行在我的文件中有21列用管道符号（|）分隔。但是在csv文件中使用此代码获取空指针异常还包括空单元格。我无法弄清楚错误在哪里。任何人帮助我

package com.alu.mdf.testsuite.sure;
import java.io.FileReader;
import java.util.List;
import com.opencsv.CSVParser;
import com.opencsv.CSVReader;
import com.opencsv.bean.ColumnPositionMappingStrategy;
import com.opencsv.bean.CsvToBean;

//import com.alu.mdf.test.common.Person;

    public class CSVExplorer {

        @SuppressWarnings({"rawtypes", "unchecked"})
        public static void main(String[] args) throws Exception
        {
            CsvToBean csv = new CsvToBean();

            String csvFilename = "TestCaseConfigurationFiles/application.csv";
            //CSVReader csvReader = new CSVReader;
            CSVParser csvParser=new CSVParser('|');
            CSVReader reader = new CSVReader(new FileReader(csvFilename),1,csvParser);



            //Set column mapping strategy
            List list = csv.parse(setColumMapping(), reader);

            for (Object object : list) {
                SUREDataBean SUREDataBean = (SUREDataBean) object;
                System.out.println(SUREDataBean);
            }
        }

        @SuppressWarnings({"rawtypes", "unchecked"})
        private static ColumnPositionMappingStrategy setColumMapping() throws Exception
        {
            ColumnPositionMappingStrategy strategy = new ColumnPositionMappingStrategy();
            strategy.setType(SUREDataBean.class);
            //strategy.createBean();
            String[] columns = new String[] {"InputDataStartIdentifier","EntityType","Operation","IncludeId","IdValue","AssociatedResource","SearchQueryForGETRequest/ParametersForPUTRequest","PayloadLocation","TestCaseName","Description","userName","password","InputDataEndIdentifier","ValidationDataStart","ExpectedStatusCode","VerficationParameters","Method","class","Prerequisites","Group","ValidationDataEnd"};
            System.out.println(columns.length);
            strategy.setColumnMapping(columns);
            return strategy;
        }

    }

这是错误堆栈跟踪：

线程“main”中的异常java.lang.RuntimeException：解析CSV时出错！ at com.opencsv.bean.CsvToBean.parse（CsvToBean.java:95）at com.opencsv.bean.CsvToBean.parse（CsvToBean.java:75）at com.alu.mdf.testsuite.sure.CSVExplorer.main（CSVExplorer） .java：28）由com.opencsv.bean.CsvToBean.processLine（CsvToBean.java:123）的com.opencsv.bean.CsvToBean.processLine（CsvToBean.java:101）处的java.lang.NullPointerException引起。 opencsv.bean.CsvToBean.parse（CsvToBean.java:91）...

使用opencsv CsvToBean的空指针excpetion

0 个答案: