我想读取txt文件内容并将其插入到我的sql表中。读取文本文件并将输出插入到mysql表中
我通过编码做到了这一点,但它显示出一些错误。也尝试通过查询,但它在表中显示为空。
查询 -
INSERT INTO patent_uspto_tmp (pinv) VALUES (LOAD_FILE('/home/gaurav/Documents/pinv.txt'));
码 -
try{
String arr[]=null;
String outputFile = "/home/gaurav/Documents/pinv.txt";
FileReader fileReader = new FileReader(outputFile);
BufferedReader bufferedReader = new BufferedReader(fileReader);
String inputLine;
List<String> lineList = new ArrayList<String>();
while ((inputLine = bufferedReader.readLine()) != null) {
lineList.add(inputLine);
}
fileReader.close();
Class.forName("com.mysql.jdbc.Driver");
Connection con=DriverManager.getConnection(
"jdbc:mysql://localhost:3306/patent","root","india2000");
for (int i = 1;i<outputFile.length();i++)
{
arr[i]=outputFile.valueOf(i);
PreparedStatement ps = (PreparedStatement) con.prepareStatement("insert into patent_uspto_tmp (pinv) values(?)");
ps.setString(1,arr[i]); // set the param here with the some value
ps.executeUpdate();
con.commit();
con.close();
}
}
catch(Exception e)
{
throw new RuntimeException(e);//System.out.println(e);
}
}
}
error - null pointer exception
请告诉我的错误? – TheLostMind
运行查询后,它在mysql表中显示为空。如果我运行的代码,我越来越像这样 - 用户连接为 –
prerna