下面的类会将 .csv 导入数据库表。它工作正常。但是，当它遇到像 2,345 这样的数值时。它导致错误。
在我的 .csv 文件中有 3 列，如下所示：
db2 表“COMPUTER”中这些列的数据类型是 COL_A(VArchar 50)、COL_B(Double)、COL_C(Varchar 50)
COL_A | COL_B | COL_C
KKGG56 | 7,567 | 2013年六月
GGHHK2 | 259,024 | 2012 年 5 月
那么，如何在导入 db 表时从特定列中删除这些逗号，以及在我的程序中放置代码的位置？请帮忙。
public class CSVLoader {
private static final
String SQL_INSERT = "INSERT INTO OPM.${table}
(${keys}) VALUES(${values})";
private static final String TABLE_REGEX = "\\$\\{table\\}";
private static final String KEYS_REGEX = "\\$\\{keys\\}";
private static final String VALUES_REGEX = "\\$\\{values\\}";
private Connection connection;
private char seprator;
public CSVLoader(Connection connection) {
this.connection = connection;
//Set default separator
this.seprator = ',';
}
public void loadCSV(String csvFile, String tableName) throws Exception {
CSVReader csvReader = null;
if(null == this.connection) {
throw new Exception("Not a valid connection.");
}
try {
csvReader = new CSVReader(new FileReader(csvFile), this.seprator);
} catch (Exception e) {
e.printStackTrace();
throw new Exception("Error occured while executing file. "
+ e.getMessage());
}
String[] headerRow = csvReader.readNext();
if (null == headerRow) {
throw new FileNotFoundException(
"No columns defined in given CSV file." +
"Please check the CSV file format.");
}
String questionmarks = StringUtils.repeat("?,", headerRow.length);
questionmarks = (String) questionmarks.subSequence(0, questionmarks
.length() - 1);
String query = SQL_INSERT.replaceFirst(TABLE_REGEX, tableName);
query = query
.replaceFirst(KEYS_REGEX, StringUtils.join
(headerRow, ","));
query = query.replaceFirst(VALUES_REGEX, questionmarks);
System.out.println("Query: " + query);
String[] nextLine;
Connection con = null;
PreparedStatement ps = null;
try {
con = this.connection;
con.setAutoCommit(false);
ps = con.prepareStatement(query);
final int batchSize = 1000;
int count = 0;
Date date = null;
while ((nextLine = csvReader.readNext()) != null) {
System.out.println( "inside while" );
if (null != nextLine) {
int index = 1;
for (String string : nextLine) {
date = DateUtil.convertToDate(string);
if (null != date) {
ps.setDate(index++, new java.sql.Date(date
.getTime()));
} else {
ps.setString(index++, string);
System.out.println( "string" +string);
}
}
ps.addBatch();
}
if (++count % batchSize == 0) {
ps.executeBatch();
}
}
ps.executeBatch(); // insert remaining records
con.commit();
} catch (Exception e) {
con.rollback();
e.printStackTrace();
throw new Exception(
"Error occured while loading data
from file to database."
+ e.getMessage());
} finally {
if (null != ps)
ps.close();
if (null != con)
con.close();
System.out.println("csvReader will be closed");
csvReader.close();
}
}
public char getSeprator() {
return seprator;
}
public void setSeprator(char seprator) {
this.seprator = seprator;
}
}