Tagged Questions

2
votes
0answers
23 views

converting blob to an image stream and assign it to jLabel

I am just trying to Convert a blob string which is in Database to Byte array and then after converting it convert to buffered Image and then assign it to a label Here's my code package ims.project; ...
2
votes
0answers
214 views

Game App Client-Server: MySQL logs “too many connections”, Linux logs “100% CPU”

I am developing a game with client-server, client of this game can be from Flash Web, J2ME or Android Mobile. Every day there are 300-400 users play this game. I am faced with headache problem, and I ...
2
votes
0answers
174 views

Ramifications for Calling Statement.cancel() on To Forcefully Close Large ResultSet in Java/MySQL

I'm developing a website that will allow registered users to search through anywhere from 10-20 million records, and those records will be cross referenced against a number of in memory caches (in ...
1
vote
0answers
18 views

hibernate exception: Batch update returned unexpected row count from update [0]; actual row count: 0; expected: 1

When i tried to save booking to DB,i got StaleStateException.in my case,i have a booking entity,bookingNo is primary key while it is not auto increment.so my logic is 1.Generate booking no and set ...
1
vote
0answers
30 views

How do i format this function using strings in a database?

This is the function in a View package for a basic website. I have a folder called productImages and a function "getString" that takes string params from my database. In this database I have a column: ...
1
vote
0answers
28 views

Which MySQL INSERT method would be faster and more reliable?

I am developing a web-based application, which processes high amount of data (200.000 - 500.000 rows) with a Java applet, then the data has to be inserted into MySQL. Java is a must, it cannot be ...
1
vote
0answers
29 views

Trying to backup my database but got error

Hello All here i am trying to backup my database but unfortunately gives error like IOException, Null pointer Exception.. so can you give me hint where is my mistake.. even i have Mysqldump file in ...
1
vote
0answers
252 views

how to store image path in mySql from jsp file using liferay?

Hello I m using lifera portlets. I want to store image path in mySql using jspfile and using that imagepath i want to display image on another jsp file. how it is possible kindly explain me. here i ...
1
vote
0answers
49 views

SmartGwt with hibernate for database connection

I am using eclipse indigo.I want to use hibernate with smartgwt smart gwt showcase I have a grid so want data from database using hibernate datasource(ds) like smartgwt showcase EE. I don't ...
1
vote
0answers
100 views

passing data from one frame and setting it in textfield in another frame retrieving corresponding data from database

I am working on a NetBeans project (Java Swings) using MySQL @ the back ground. Got struck in this particular scenario. I am working with a JTable in one frame, say frame1 from where a row has to be ...
1
vote
0answers
112 views

Improve the speed of reading and persisting Apache POI excel file

I have an excel file i am currently able to import into a mySQL database but i would like to increase the speed of import somewhat. My set up for reading the excel files (approx 40,000 rows in each ...
1
vote
0answers
67 views

jdbc mysql query where I am unsure how many columns are being selected

Full disclosure: This is homework. I have a GUI written in java that interacts with a database with 4 buttons to Add, Delete, Query and Modify. The GUI has 6 textfields (MemberNumber, LastName, ...
1
vote
0answers
64 views

Blob datatype in service.xml of liferay

I am working with liferay and want to store images in my MySQL database. My service.xml goes like this: <entity name="DLApp" local-service="true" remote-service="true"> <column ...
1
vote
0answers
80 views

How to map arbitrary JSON object into MySQL

I am using Spring MVC and Hibernate to store objects that have a pre-defined structure in MySQL. I am familiar with this process. What I want to do is store an arbitrary JSON object that I don't ...
1
vote
0answers
115 views

How to store utf8 to mysql 5.X via jdbc

I am trying to store data to mysql, an excerpt of which is shown here: "description":"★배달 사고 혹은 장난주문 방지주 찾는 배달음식점 즐겨찾기\n지난 주문 내역 확인\n포인트 적립 및 결제\n소셜 네트워크 연동을 통한 평가 남기기\n철가방에서 제공하는 다양한 이벤트", ...

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