mybatis | Mybatis study | Object-Relational Mapping library
kandi X-RAY | mybatis Summary
kandi X-RAY | mybatis Summary
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Top functions reviewed by kandi - BETA
- Login user
- Set the address
- Set the birthday
- Set the sex of the search
- ResultSet object as a PhoneNumber object
- Get a phone number from the result set
- Get Phone Number from ResultSet
- Update user by id
- Set the id
- Set phone number
- Get the name as a string
- Sets the current note
- Set the pic attribute
- Set the human - readable name
- Set the detail message
- Insert user
- Find users by username
- Find user by username
- Find user by id
- Delete user by id
- Set the number
mybatis Key Features
mybatis Examples and Code Snippets
Community Discussions
Trending Discussions on mybatis
QUESTION
Here is the example code:
...ANSWER
Answered 2022-Apr-12 at 04:38I think current the best way is using UserType. Follow the article Custom Types in Hibernate and the @Type Annotation can be very helpful.
But I still don't know what is the advantage of the CompositeUserType.
QUESTION
I'm updating a spring boot project by adding a page called news and it has error below.
Field newsService in com.lrs.admin.controller.NewsController required a bean of type 'com.lrs.admin.service.INewsService' that could not be found.
The code is like below: Application.java
...ANSWER
Answered 2022-Apr-07 at 09:59you should annotate @Service on the class which implements the interface instead of the interface itself. That is, annotate the NewsService with @Service, and you can remove the @Component tag from INewsService
QUESTION
I need to use mybatis provide data which stored in TDengine time-series database. But I found the count() function will return nothing if there is no any data.
...ANSWER
Answered 2022-Mar-25 at 07:54this is a known issue by design in TDengine, in TDengine 2.x version, this issue won't be fixed.
QUESTION
I am beginner for Java software language. I have been working on C# software language.
I would like to ask a question. I have been working on a project that is about a small core banking solution. I wonder if I can use MyBatis,IBatis with CQRS Pattern and Domain Driven Design instead of using org.springframework.data.repository or not. Is using mybatis a good fit for the CQRS pattern?
I have been researching an example project on the Internet, but I could not find it. I wonder if there is an example for me or not.
Do you have any ideas?
...ANSWER
Answered 2022-Mar-19 at 00:22DDD and CQRS don't care about the framework you are using for db persistence.
In the sense that for DDD (the nearest part to the db persistence) has its way, commonly through the repository pattern, to abstract away the persistence.
So, theoretically you could just create your interfaces for the repositories and implement them using whatever thing you want.
What is important to DDD is that your implementation for the persistence respect the guarantees needed for the repositories (like storing an aggregate is an atomic operation), but if you can meet them, any implementation will make your domain work as expected.
About being a good fit, it depends on the benifits your situation can gain from using one or the other, spring data + hibernate are very easy to setup and use, and they also have a lot of automatism already implemented, with IBatis maybe you can write custom queries more performant, as most of the things in computer science, it depends.
QUESTION
It is possible to use yaml's profile variable in spring mybatis's mapper xml?
If is it possible, how i can use?
...ANSWER
Answered 2022-Mar-04 at 07:51I think you cannot do this in a simple way as both *.yml and *.xml files are loaded at application start-up time. Instead you can propagate values into placeholders within XML at build time using maven/gradle plugin.
E.g. for maven this can be done with maven-resource-plugin:
For example, if we have a resource src/main/resources/hello.txt containing
QUESTION
I used tdengine in mybaits project,and use Taos-jdbc’s restful connector to manipulate the DB. Everything goes will until I used the alter sql try to modify the columns of the table. Then I met an error that is “invalid variables “ the error trace logs are follow:
Caused by: java.sql.SQLException: ERROR (2303): invalid variables at com.taosdata.jdbc.TSDBError.createSQLException(TSDBError.java:71) at com.taosdata.jdbc.TSDBError.createSQLException(TSDBError.java:58) at com.taosdata.jdbc.rs.RestfulStatement.getAffectedRows(RestfulStatement.java:134) at com.taosdata.jdbc.rs.RestfulStatement.executeOneUpdate(RestfulStatement.java:125) at com.taosdata.jdbc.rs.RestfulStatement.execute(RestfulStatement.java:82) at com.taosdata.jdbc.rs.RestfulPreparedStatement.execute(RestfulPreparedStatement.java:218) at com.zaxxer.hikari.pool.ProxyPreparedStatement.execute(ProxyPreparedStatement.java:44) at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.execute(HikariProxyPreparedStatement.java) at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:47) at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:64) at com.sun.proxy.$Proxy211.update(Unknown Source) at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:50) at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117) at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49) at com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor.intercept(MybatisPlusInterceptor.java:106) at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:62) at com.sun.proxy.$Proxy210.update(Unknown Source) at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:194) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:427) ... 85 more
However the error was occured but the columns has been add into the table correctly. I don’t know what’s wrong with that,can someone help me?
...ANSWER
Answered 2022-Feb-26 at 17:06You can update your jdbc to the latest version. This is because the "alter command " return value of TDengine server is not as the my batis frame expect. This problem has been fixed.
QUESTION
In the database, the column "status" is integer.
xml mybatis
...ANSWER
Answered 2022-Feb-18 at 19:58The default EnumTypeHandler maps enum's name (e.g. "CREATED", "RUNNING"), so the column type must be one of text types like VARCHAR [1].
As MyBatis knows nothing about the id property, you have to write a custom type handler.
Here is an example implementation.
QUESTION
Background: spring + mybatis + oracle data source
Requirement: support postgreSQL data source exchange with minimum code change
Example:
Current: controllerA -> ServiceA -> daoA -> A.xml (oracle)
Now need: we can configure use oracele/postgreSQL database source
If configure use postgreSQL: controllerA -> ServiceA -> daoA -> A.xml (postgreSQL)
More:
Same controllerA、ServiceA for same business logic
Differenct DaoA、A.xml for oracle and postgreSQL mybatis sql implementation
DaoA is better to be same if it can be.
The data and sql logic is the same for oracle and postgreSQL, just need a congfiguration to change to use oracle/postgreSQL implementation.
How to implement it?
...ANSWER
Answered 2022-Feb-18 at 07:20Solution is on the comments: use databaseIdProvider technique will work
QUESTION
Some version information:
- Jboss 6.4
- Postgres 9.6
- mybatis-3 CDI
- Postgres Driver 42.2.20 JDBC 4
I'm having a problem that is causing pretty catastrophic behavior in my system. From my debugging I've been able to deduce that an idle transaction appears to be locking a table in my database, causing the application to freeze (certain locks aren't being released). I've been able to stop the freezing my setting timeouts in mybatis but I cannot figure out what is causing the idle transaction in the first place. The good news is that its always the same UPDATE statement that appears to be blocked. However, I can't narrow down what query/trans curring and I'm seeing behavior that I understand.
Here is the query that always seems to lock up (Some names were changed but this query normally works):
...ANSWER
Answered 2022-Feb-15 at 16:39So I discovered what the problem was. The issue really wasn't the database's fault or even the queries that were being used. It turns out that our system was using the same Transaction subsystem for both it our Data Source (Postgres Database) and our JMS messaging system. When a JMS message was sent, it created a transaction and every transactional based action that followed during the life cycle of that tread/transaction would be treated as part of that original transaction. Which includes all of our database calls.....
This explains why a query as simple as insert into a message log was touching all of our relations in the database. The debug queries only showed me the first query/statement sent to the database, not all of the others that were used during the life cycle of the JMS message. There were several ways to fix this but my team opted for the easiest which was preventing the Data Source from using the JBoss provided Transaction Manager.
QUESTION
I'm looking for way to setup migration mechanism like liquibase or mybatis for AWS RDS.
I have Spring Boot application. And probably i can use liquibase for example for postgresql in AWS RDS. In this case I think I have two ways: 1) add liquibase to my project and run migration in Cincinnati/CD.2) or create separate project with liqoibase only.
But I want to find another way to implement migrations mechanism.
What else can I use for migrations in AWS?
...ANSWER
Answered 2022-Feb-01 at 14:59AWS RDS is just providing your PostgreSQL database server. What you do with the tables and data inside that server is not any different than what you would do with the tables and data inside any other PostgreSQL server. There are no extra or different schema migration options available to you in AWS RDS.
Your options for schema migration tools in Spring Boot are really Liquibase or Flyway.
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Install mybatis
You can use mybatis like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the mybatis component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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