如何使用java从mysql导出表

2023年3月8日 167次阅读

我需要使用
java从mysql导出一个表.我试过用

public class automateExport {
    public static void main(String[] argv) throws Exception {
        String driverName = "com.mysql.jdbc.Driver";
        Class.forName(driverName);
        String serverName = "192.168.0.189";
        String mydatabase = "ArchiveIndexer";
        String url = "jdbc:mysql://" + serverName + "/" + mydatabase;
        String username = "username";
        String password = "password";
        Connection connection = DriverManager.getConnection(url, username, password);
        Statement stmt = connection.createStatement();
        String filename = "c:/outfiless.txt";
        String tablename = "D_Centre";
        System.err.println("SELECT * INTO OUTFILE \"" + filename + "\" FROM " + tablename);
        stmt.executeUpdate("SELECT * INTO OUTFILE \"" + filename + "\" FROM " + tablename);
        // stmt.executeQuery("SELECT * INTO OUTFILE \"" + filename + "\" FROM " + tablename);
        // stmt.execute("SELECT * INTO OUTFILE \"" + filename + "\" FROM " + tablename);
    }
}

但是这就像扔错误一样

"Exception in thread "main" java.sql.SQLException: Can not issue SELECT via executeUpdate().
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)
    at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1764)
    at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1725)
    at automateexceldatabase.automateExport.main(automateExport.java:38)
Java Result: 1"

最佳答案 这将有助于：

public class DatabaseToCSV {
    public static void main(String[] args) {
        String filename =
            "C:\\Documents and Settings\\admin\\My Documents\\NetBeansProjects\\AutomateExcelDatabase\\myjdbcfile.csv";
        try {
            FileWriter fw = new FileWriter(filename);
            Class.forName("com.mysql.jdbc.Driver").newInstance();
            Connection conn = DriverManager.getConnection(
                "jdbc:mysql://192.168.0.189:3306/ArchiveIndexer"
                , "username"
                , "password"
            );
            String query = "select * from D_Centre";
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery(query);
            while (rs.next()) {
                fw.append(rs.getString(1));
                fw.append(',');
                fw.append(rs.getString(2));
                fw.append(',');
                fw.append(rs.getString(3));
                fw.append(',');
                fw.append(rs.getString(4));
                fw.append('\n');
            }
            fw.flush();
            fw.close();
            conn.close();
            System.out.println("CSV File is created successfully.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
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