74 lines
1.9 KiB
Java
74 lines
1.9 KiB
Java
package com.wasteinformationserver.db;
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import com.wasteinformationserver.basicutils.Log;
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import java.io.IOException;
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import java.sql.*;
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public class JDCB {
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static Connection conn;
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static JDCB jdcb;
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static boolean loggedin = false;
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static String usernamec;
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static String passwordc;
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static String dbnamec;
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static String ipc;
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static int portc;
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public static void init(String username, String password, String dbname, String ip, int port) throws IOException {
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usernamec = username;
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passwordc = password;
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dbnamec = dbname;
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jdcb = new JDCB(username,password,dbname,ip,port);
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}
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private JDCB(String username, String password, String dbname, String ip, int port) throws IOException {
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logintodb(username,password,dbname,ip, port);
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}
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public static JDCB getInstance() throws IOException {
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if (loggedin){
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return jdcb;
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}else {
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logintodb(usernamec,passwordc,dbnamec,ipc,portc);
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return jdcb;
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}
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}
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public static void logintodb(String username, String password, String dbname, String ip, int port) throws IOException {
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Database db = new MySQLConnector(
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username,
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password,
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ip,
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port,
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dbname);
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try {
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conn = db.getConnection();
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loggedin = true;
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} catch (SQLException e) {
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throw new IOException("No connection to database");
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}
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}
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public ResultSet executeQuery(String sql) {
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try {
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PreparedStatement stmt = conn.prepareStatement(sql);
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return stmt.executeQuery();
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} catch (SQLException e) {
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e.printStackTrace();
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}
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return null;
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}
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public int executeUpdate(String sql) throws SQLException {
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PreparedStatement stmt = conn.prepareStatement(sql);
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return stmt.executeUpdate();
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}
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}
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