Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class Main {
    public static Connection getConnection() throws Exception {
        String driver = "org.gjt.mm.mysql.Driver";
        String url = "jdbc:mysql://localhost/databaseName";
        String username = "root";
        String password = "root";
        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static String getCLOB(int id) throws Exception {
        Connection conn = null;
        ResultSet rs = null;
        PreparedStatement pstmt = null;
        String query = "SELECT clobData FROM tableName WHERE id = ?";

        try {
            conn = getConnection();
            pstmt = conn.prepareStatement(query);
            pstmt.setInt(1, id);
            rs = pstmt.executeQuery();
            rs.next();
            Clob clob = rs.getClob(1);
            // materialize CLOB onto client
            String wholeClob = clob.getSubString(1, (int) clob.length());
            return wholeClob;
        } finally {
            rs.close();
            pstmt.close();
            conn.close();
        }
    }

    public static void main(String args[]) throws Exception {
        System.out.println(getCLOB(01));
    }
}