I am trying to map a User with a certain Table in a one to one relationship. This here is my code, id appreciate if u take a look at it: User class: The Table class: Answer You don’t mapped parent entity with child entity properly.In parent table object of CTable is currenTable and you mapped by with ta…
Tag: mysql
Change a line to prepared statement
I have this line and I am trying to do this line prepared statement but I am not able to do it. What I did is this : the sql table is this Answer This folwoing code should be encapsuled in a ty catch statment Also i hope you add a password hashing function to your code, every thing else
Looking for Java Multithreaded Client-Server chat application with database tutorial
Im trying to build a Java Multithreaded Client-Server chat application with a database. The database is to store username and password. I am able to build a basic Java Multithreaded Client-Server chat application, but have no idea how to create the database side. Ive found lots of downloadable source code but…
Getting error : org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: javax/validation/ValidatorFactory
I have a project Webservice with Hibernate in Eclipse (Tomcat v10.0 et java JDK 8). When I run, I got this error: ” Servlet.service() for servlet [Jersey Web Application] in context with path [/musichall] threw exception [org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: ja…
org.h2.jdbc.JdbcSQLSyntaxErrorException h2 database java
Exception in thread “main” org.h2.jdbc.JdbcSQLSyntaxErrorException: Syntax error in SQL statement “INSERT INTO SMTP_DATA(SMTP_SERVER, SMTP_USERNAME, SMTP_PASSWORD, SMTP_FROM, SMTP_TO) VALUES (DEMO.STMP.COM, DEMOUSERNAME, DEMOPASSWORD, FROMDEMO@[*]MAIL.COM, TODEMO@MAIL.COM);”; expected …
Unable to retrieve data from database through JDBC query
I trying to make a connection to my DDBB in order to print all the columns from a table but I keep getting Null. I have checked the connection parameters and everything seems correct. I’m thinking that maybe there is something wrong with my query statement: Answer I managed to solve the problem by addin…
Accept Duplicate Entry Exception for Performance Benefits?
I am currently programming a news API. To fetch news I am using java to parse XML from a List of RSS Feeds (URLs) and write them to a mysql database. I am doing this at a regular interval i.e. every 5 minutes. As these news feeds often are identical or similar to the prior time fetching I currently get
Using Java check to determine if there is data in mySQL table before updating table
I am new to Java and am trying to see if the date (actually day of week) column in MySQL contains the date before updating the table. If the date already exist the table should not be updated and if the date doesn’t exist the table should be updated. I’ve tried different code. My prior code either…
Hibernate adds unwanted unique key itself In @OneToMany mapping
I have 3 entities in my Spring boot application. User,Item and Orders I want one Orders object to have multiple Items so, I used @OneToMany mapping in Orders class. This is my code: This is my Item.java file This is my Orders.java file Hibernate is generating 3 tables as I expected Item , Orders and Orders_It…
Android device can’t connect to mysql in localhost [closed]
Closed. This question needs debugging details. It is not currently accepting answers. Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question. Closed 1 year ago. Improve this question I̵…