Day 2

Technology is anything that wasn’t around when you were born. 
                                    - Alan Kay (Computer Scientist)

                  

Comments

Post a Comment

Popular posts from this blog

Export data from mysql db to csv file using java

Image
Hi friends ! Today I am discussing about simple but very important scenario. When we create any application then during creation of application we have face many scenarios like 1.Taking information from user and storing these information inside database : Generally such type of Operation is performed by user using form application 2.Taking Data from Database and Displaying on Page : We can perform such type of Operation in various ways like using JSP,JSTL tags or you can perform such operations using JQUERY also. 3.Taking Data from Database and download it in Excel or CSV format : In this we want our data from database and store it inside Excel or text files for further use. And we have chosen third scenario from discussion for performing this Operation we have to need three files exportCsv.html  :- this contains a button for clicking and performing exporting data from database Operation ExportData.java  :- It is a servlet class which defines connectivity fro...
Keep reading

Secure Database Connectivity in node.js with mysql

Image
Hi Everyone! Yesterday my friend Andrea from Italy asked me a question about secure Database connectivity in node.js with mysql i.e. he wants to a secure database connection in node.js for some secure keys like username,password,database name that we use during database connectivity.His problem is obviously right from security point of view as we know that JavaScript is client side scripting knowledge so it is compiled on client side so after inspecting page some one can be able to view these secure keys which I discussed previously. I surf internet and found there are various ways to solve this problem I am not discussing all of them here but also I discussing here two of them and after this discussion I think Andrea and other reader who are facing with same problem can be able to resolve their problem. I choose two ways to solve this problem. Connection code in app.js file Create a Json file Connection code in app.js file : Javascript is client side language and code i...
Keep reading

Table not found in statement

Class . forName ( "org.hsqldb.jdbcDriver" ); conn = DriverManager . getConnection ( "jdbc:hsqldb:file:Pokemondaten" , "sa" , "" ); getData = conn . createStatement (); ResultSet rs = getData . executeQuery ( "SELECT HP FROM PKMN WHERE ID = " + basicnumber ); int hpp = rs . getInt ( 1 ); System . out . println ( hpp ); all I get is java . sql . SQLException : Table not found in statement [ SELECT HP FROM PKMN ] at org . hsqldb . jdbc . Util . sqlException ( Unknown Source ) at org . hsqldb . jdbc . jdbcStatement . fetchResult ( Unknown Source ) at org . hsqldb . jdbc . jdbcStatement . executeQuery ( Unknown Source ) at pokeWpRechner . Main . main ( Main . java : 46 ) My Databased is called  Pokemondaten and my table is called  PKMN , also my table is inherited in the programm. So what did i do wrong? i dont get it. Hi Ekonion,  You are facing above problem.You may...
Keep reading