Mybatis - Related information

• MyBatis uses dynamic SQL on annotations (@ select uses if)

  @Select({ "<script>", "select * from user_info where 1=1", "<when test= name!=null and name!= >", "and name = -sharp{name}", "<...

  Mybatis

  Jul.16,2022
• In the SpringBoot project, use Mybatis to dynamically create sql statements and how to insert OR conditions between loop inserts Where

  first post the code for dynamically creating sql AND(); for (Object key : key_values){ WHERE("(article.title LIKE %"+key.toString()+"% OR article.content LIKE %"+key.toString()+"% )"); } the final output SQL s...

  Java mybatis

  Jul.14,2022
• Error in batch query encapsulated with Mybatis Plus

  < H1 > error using Mybatis Plus encapsulated batch query < H1 > < H2 > Environment < H2 > JDK 1.8 Spring Boot 2.0.6.RELEASE mybatis-plus-boot-starter 2.3 < H2 > scene < H2 > We need to encapsulate a general method that can be queried accor...

  Java mybatis

  Jul.12,2022
• In MyBatis, the dynamic SQL constructed by annotations is and by default when splicing multiple Where, and how to modify it to or

  such as the title, for example, I implement the following splicing for (Object key : key_values){ WHERE("(article.title LIKE %"+key.toString()+"% OR article.content LIKE %"+key.toString()+"% )&quo...

  Mybatis

  Jul.07,2022
• How to inject real mapper objects when spring framework gives unit testing to service layer

  This method is provided in the crud interface of mybatis-plus ** * * entity * * * @param queryWrapper null * @return * List<T> selectList(@Param(Constants.WRAPPER) Wrapper<T> queryWrapper); by using the wrapper object, it is...

  Spring mybatis java

  Jul.04,2022
• Mybatis BindingException: Invalid bound statement

  Mybatis is used in the project to extract common modules. The common module includes Mapper.java and Mapper.xml , which will be introduced by other modules, such as module An and module B. There is no problem for module A to introduce common modules,...

  Mybatis

  Jun.27,2022
• Discussion on Entity and DTO

  1) is it better for repository to return entity or dto? 2) is the design in entity as good as the table structure in the database? Is it better to use associated objects? example: define Entity entities method 1: @Entity class Duty { private L...

  Spring-mvc mybatis java

  Jun.15,2022
• What's going on when Mybatis generator runs when maven is packaged for a project?

  as shown in the figure, when I packaged with package, I found that both mapper.xml mapper.java and java bean had been modified. , that is, the plug-in is included in the life cycle of package. how to break this? In pom, my configuration is &l...

  Mybatis mybatis-generator maven java

  May.31,2022
• Mybatis generator generates a model of all the databases in the mysql server.

  mybatis generator generates a model of all the databases in the mysql server, and I only need to generate one of them. The configuration is configured as follows: https: www.jianshu.com p 5c8... the difference is that the mysql server in the tutor...

  Mybatis mybatis-generator mysql

  May.29,2022
• How does springmvc CRUD mssql?

  < H2 > problem description < H2 > I want to achieve a restful webapi operation mssql database for the simplest addition, deletion, modification and query, after learning restful api has a general understanding, but ssm connection query mssql database...

  Restful spring-mvc mybatis sqlserver java

  May.24,2022
• Deployment server denied for user 'root'@'localhost' (using password: YES)?

  1. Tomcat on a running server, add a B item, and report "Access denied for user root @ localhost (using password: YES) ". run locally and connect to the server s database at the same time. Put the code on the server and report an error. 2. Tom...

  Mybatis mysql

  May.22,2022
• The problem of lack of dependence on mybatis generator operation

  I want to generate it automatically with mybatis generator, which is as follows in pom: <build> <plugins> <plugin> <groupId>org.mybatis.generator< groupId> <artifa...

  Mybatis maven java

  May.17,2022
• An error was reported from the result of mybatis query to entity object

  org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: Could not set property truckType of class com.cargopm.order.dto.OrderMainDto with value Cause: org.apache.ibatis.reflection.Refl...

  Mybatis-generator mybatis java

  Apr.20,2022
• It cannot be loaded normally using MyBatis,TypeHandler in OSGI environment

  how do you solve the problem that MyBatis cannot load TypeHandler according to the fully qualified name of the class in the configuration file in OSGI environment? for example: <delete id="deleteById" statementType="PREPARED"&...

  Class-loader class-loading-mechanism osgi java mybatis

  Apr.13,2022
• Mybatis annotation method, how to implement MySQL, after update, return the updated value

  as shown in the title, the stupidest way is to write a modification statement first, and then write a query statement, but it is a waste of resources to connect to the database frequently based on Mybatis, can @ Update be implemented, and the return v...

  Springboot java mybatis

  Apr.10,2022
• How mybatis plus saves the string array to the database

  how mybatis plus saves string arrays, arrays like [xxx,xxx] to the database. currently using < result column= "department " jdbcType= "VARCHAR " property= "department " in xml typeHandler="com.springboot.config.JsonStringArrayTyp...

  Mybatis java

  Apr.01,2022
• MybatisPlus Custom Global Operation exists always returns null

  < H1 > MybatisPlus Custom Global Action exists always returns null < H1 > < H2 > scene < H2 > customizes a global operation for mybatis-plus , and then returns null all the time. when I was customizing the sql injector class, I suddenly found t...

  Sql java mybatis

  Mar.05,2022
• Execute a simple select statement with MyBatis to report to RuntimeException

  druid + Mybatis + spring boot. , Sql(, 20.), . druid? . 2018-12-05T22:16:01.306+0800 [ERROR] interceptor.RuntimeExceptionInterceptor < http-nio-6016-exec-2_xxx.i.RuntimeExceptionInterceptor.handleBizExceptions (52) _ c.g.x.f.i.RuntimeExceptionIntercept...

  Springboot mybatis druid java

  Jan.20,2022
• Mybatis judges according to the non-empty time of id query.

  write as follows: select * from t_user t where 1 = 1 <if test="id != null and id != "> and t.id = -sharp{id} < if> if id is empty, all users will be found. What should I do? if the id non-null judgment is made before t...

  Mybatis java

  Jan.19,2022
• Mysql in collection query optimization problem.

  problem description 1.mysql in collection query is too inefficient and takes too long. the environmental background of the problems and what methods you have tried user_id and physicion are the user fields associated with this table. Because the s...

  Mysql-optimized mybatis java

  Dec.08,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b9cdf4-2f33b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b9cdf4-2f33b.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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