Question

我尝试创建csv文件，以便在excel或liberoffice calc中使用它。但我有这个问题。

mysql> SELECT *
    FROM formtable
    INTO OUTFILE "/tmp/try.csv"
    FIELDS TERMINATED BY ','
    OPTIONALLY ENCLOSED BY '"'
    ESCAPED BY '"'
    LINES TERMINATED BY "\n";

如果我使用此命令，一切顺利。但是在服务器端，我不认为我在Linux中有像tmp文件夹这样的tmp文件夹。因此，我尝试在下面给出具体路径

mysql> SELECT *
    FROM formtable
    INTO OUTFILE "/var/www/try.csv"
    FIELDS TERMINATED BY ','
    OPTIONALLY ENCLOSED BY '"'
    ESCAPED BY '"'
    LINES TERMINATED BY "\n";

它给出了

ERROR 1 (HY000): Can't create/write to file '/var/www/try.csv' (Errcode: 13)

如果我将路径设为/home/blah/try.csv，则存在相同的错误。你有什么建议吗？

Answer 1

import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;    
import au.com.bytecode.opencsv.CSVWriter;

public class WriteCSV {
    public static void main(String[] args) {

        try {
            String connectionURL = "jdbc:mysql://localhost:3306/test";
            Class.forName("com.mysql.jdbc.Driver");
            Connection con = DriverManager.getConnection(connectionURL, "root", "root");
            Statement stmt = con.createStatement();
            ResultSet rs = stmt.executeQuery("select id_movie, movie_name from movies");
            String csv = "E:\\dummyFolder\\output2.csv";
            CSVWriter writer = new CSVWriter(new FileWriter(csv));
            List<String[]> data = new ArrayList<String[]>();
            while (rs.next())
            {
                data.add(new String[] { rs.getString(1), rs.getString(2) });
            }
            writer.writeAll(data);
            System.out.println("CSV written successfully.");
            writer.close();

        } 
        catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        catch (SQLException e) 
        {
            e.printStackTrace();
        } 
        catch (FileNotFoundException e) 
        {
            e.printStackTrace();
        } 
        catch (IOException e) 
        {
            e.printStackTrace();
        }
    }
}

您需要添加here

中的opencsv-2.3.jar

Answer 2

您应该检查权限。 ls -l /your/path。

请注意，您的用户不应该有权写入所选文件夹，而是mysql用户。您应该检查所有者，组，“其他”权限。

通常您可以在/tmp文件夹中创建文件。

mysql表到csv

2 个答案: