JAVA JDBC TABLE EXAMPE

JDBC_Ex.java

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package com.swalahamani.ts.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author swalahamani
 */
public class JDBC_Ex {
    private final String DB_URL = "jdbc:postgresql://localhost:5432/DB_NAME";
    private final String DB_USR = "postgres";
    private final String DB_PAS = "password";
    
    
    /*
        sql qyert ->   SELECT * FROM DAILY_EXPENSE WHERE AMOUNT = 45;
        
        showDBTable("DAILY_EXPENSE", "AMOUNT", "45");
         
    */
    public void showDBTable(String tableName, String colName, String value) {
        Connection con;
        Statement smt;
        ResultSet rs;
        
        try {
            Class.forName("org.postgresql.Driver");
            
            con = DriverManager.getConnection(DB_URL, DB_USR, DB_PAS);
            
            smt = con.createStatement();
            
            rs = smt.executeQuery("SELECT * FROM "+tableName+" WHERE "+colName+" = "+value);
            
            while(rs.next()) {
                System.out.println(rs.getString("DATEE"));
                System.out.println(rs.getString("NAME"));
                System.out.println(rs.getString("DESCRIPTION"));
                System.out.println(rs.getString("AMOUNT"));
            }
            
            rs.close();
            smt.close();
            con.close();
            
            
            
        } catch (ClassNotFoundException ex) {
            Logger.getLogger(JDBC_Ex.class.getName()).log(Level.SEVERE, null, ex);
        } catch (SQLException ex) {
            Logger.getLogger(JDBC_Ex.class.getName()).log(Level.SEVERE, null, ex);
        }
        
    }
    
    
}