java + database

254 100+

Expand|Select|Wrap|Line Numbers

  
imageValue=null
 
SEVERE:-->

com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Column 'Gout_msgtext' cannot be null

    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931)

    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2941)

    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623)

    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715)

    at com.mysql.jdbc.Connection.execSQL(Connection.java:3249)

    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1268)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1541)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1455)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1440)

    at asiamsms.dbo.Gout.insertRequest(Gout.java:363)

    at asiamsms.product.ProcessM$RemindTask.run(ProcessM.java:234)

    at java.util.TimerThread.mainLoop(Unknown Source)

    at java.util.TimerThread.run(Unknown Source)

the table column 'Gout_msgtext' datatype is longblob , not null.

i set the imageValue to "0" as string, at first;

and then i do this :

Expand|Select|Wrap|Line Numbers

imageValue = Product.product_image;

and then i System.print the imageValue, and it get "null" like this --:

Expand|Select|Wrap|Line Numbers

 
//output

imageValue = null

product_image is actually get value from database table, and the data type is also longblob, but get the value as String in java...

i have no idea why it get "null"...

Jul 17 '07 #1

Subscribe Post Reply

1931

r035198x

13,262

8TB

Expand|Select|Wrap|Line Numbers

imageValue=null

SEVERE:-->

com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Column 'Gout_msgtext' cannot be null

    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:931)

    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2941)

    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1623)

    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1715)

    at com.mysql.jdbc.Connection.execSQL(Connection.java:3249)

    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1268)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1541)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1455)

    at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:1440)

    at asiamsms.dbo.Gout.insertRequest(Gout.java:363)

    at asiamsms.product.ProcessM$RemindTask.run(ProcessM.java:234)

    at java.util.TimerThread.mainLoop(Unknown Source)

    at java.util.TimerThread.run(Unknown Source)

the table column 'Gout_msgtext' datatype is longblob , not null.

i set the imageValue to "0" as string, at first;

and then i do this :

Expand|Select|Wrap|Line Numbers

imageValue = Product.product_image;

and then i System.print the imageValue, and it get "null" like this --:

Expand|Select|Wrap|Line Numbers

//output

imageValue = null

product_image is actually get value from database table, and the data type is also longblob, but get the value as String in java...

i have no idea why it get "null"...

Expand|Select|Wrap|Line Numbers

imageValue = Product.product_image;

can easily result in imageValue being null after that statement. Especially if it is executed before the value of product_image has been initialized.

Jul 17 '07 #2

by: JShurmatz | last post by:

If anyone can shed some light on this problem I would greatly appreciate it. I am unsuccessfully trying to use a database connnection retrieved from a pool configured using Java System Web...

Java

Small Python, Java comparison

by: Dave Brueck | last post by:

Below is some information I collected from a *small* project in which I wrote a Python version of a Java application. I share this info only as a data point (rather than trying to say this data...

Python

Object test = new Object() <-- Java, best way in C++

by: DrUg13 | last post by:

In java, this seems so easy. You need a new object Object test = new Object() gives me exactly what I want. could someone please help me understand the different ways to do the same thing in...

C / C++

Accessing DB2 database via Java?

by: Hassan Naqvi | last post by:

Hi, Basically, I am Java developer. In past I have played with Oracle using Java (JDBC). But this is the time to play with IBM DB2 using Java (JDBC). So kindly help this DB2 newbie. I have a...

DB2 Database

Download the JAVA , .NET and SQL Server interview with answers

by: Jobs | last post by:

Download the JAVA , .NET and SQL Server interview with answers Download the JAVA , .NET and SQL Server interview sheet and rate yourself. This will help you judge yourself are you really worth of...

C# / C Sharp

java.rmi.RemoteException:

by: oll3i | last post by:

package library.common; import java.sql.ResultSet; public interface LibraryInterface { public ResultSet getBookByAuthor(String author); public ResultSet getBookByName(String name);

Java

Easy Steps to Fix "Canon Printer Won't Connect to WiFi Network"

by: taylorcarr | last post by:

A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...

General

Basic Javascript concepts

by: aa123db | last post by:

Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...

Javascript

Batch import of multiple excel files into the database

by: ryjfgjl | last post by:

If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...

Data Management

Merging data from multiple Excel files

by: ryjfgjl | last post by:

In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...

Data Management

Looking to do Android software development, any suggestions? Is flutter better?

by: nemocccc | last post by:

hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?

General

Is that possible of reading the .csv file in column wise and the column have different lengths ?

by: Sonnysonu | last post by:

This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...

C / C++

How to build RAID in BIOS?

by: Hystou | last post by:

There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...

Computer Hardware

What is ONU?

by: marktang | last post by:

ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...

General

Maximizing Business Potential: The Nexus of Website Design and Digital Marketing

by: jinu1996 | last post by:

In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...

Online Marketing

java + database

Similar topics