我正在尝试将Spring Data JDBC与MyBatis一起使用。我对使用CrudRepository提供的开箱即用的CRUD方法以及编写MyBatis XML文件中定义的ADDITIONAL自定义查询感兴趣。
通过阅读jdbc.mybatis的说明,听起来我需要做的就是创建一个实现我喜欢的方法的Mapper
(遵守规则“语句的名称是通过将实体类型的完全限定名称连接起来构造的Mapper“)并为我的CrudRepository
添加方法签名。我已经做到了,但Spring Data似乎从未找到我的方法并给出了这个错误:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fooApplication': Invocation of init method failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: No query specified on findByChangeOwnerId; nested exception is java.lang.IllegalStateException: No query specified on findByChangeOwnerId
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:849) ~[spring-beans-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.3.RELEASE.jar:2.1.3.RELEASE]
at com.xxx.fooApplication.main(fooApplication.java:42) [classes/:na]
Caused by: org.springframework.dao.InvalidDataAccessApiUsageException: No query specified on findByChangeOwnerId; nested exception is java.lang.IllegalStateException: No query specified on findByChangeOwnerId
我也跟随了mybatis-spring-boot-sample的例子,但是对我来说并没有太多关于那里的内容。
问题是:
我的CrudRepository
MyBatisContext
SRC /主/资源/ application.yml
package com.xxx.repository.jdbc;
import com.xxx.model.Foo;
import org.springframework.data.repository.CrudRepository;
import org.springframework.data.repository.query.Param;
import java.util.List;
public interface FooBmtRepository extends CrudRepository<Foo, String> {
List<Foo> findByChangeOwnerId(@Param("id") String id);
}
文件夹XML
mybatis:
mapper-locations: classpath:/mapper/**/*.xml
configuration:
map-underscore-to-camel-case: true
依赖关系(大多数是使用启动器导入,显示所有拼写,因为我无法正确显示<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.xxx.model.ItsmMapper">
<!--<select id="findByChangeOwnerId" resultType="com.xxx.model.Itsm" parameterType="org.springframework.data.jdbc.mybatis.MyBatisContext">-->
<!--where change_owner_id=#{changeOwnerId}-->
<select id="findByChangeOwnerId" resultMap="itsmResultMap" parameterType="String">
select *
from [myschema].[tbl_itsms_bmt]
where change_owner_id=#{id}
</select>
<resultMap id="itsmResultMap" type="com.xxx.model.Itsm">
<result property="changeNumber" column="change_number"/>
<result property="itsmUrl" column="itsm_url"/>
<result property="changeTitle" column="change_title"/>
<result property="category" column="category"/>
<result property="status" column="status"/>
<result property="createdDate" column="created_date"/>
</resultMap>
</mapper>
)
mvn dependency:tree
您链接到的部分的开头是:
对于
<dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-jdbc</artifactId> <version>1.0.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-commons</artifactId> <version>2.1.5.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.6.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>5.1.6.RELEASE</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot</artifactId> <version>2.1.3.RELEASE</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.0.0</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.0</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.0</version> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-autoconfigure</artifactId> <version>2.0.0</version> </dependency> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.0.0</version> </dependency>
中的每个操作,Spring Data JDBC都运行多个语句。如果应用程序上下文中有CrudRepository
,则Spring Data会针对每个步骤检查SessionFactory是否提供语句。如果找到一个,则使用该语句(包括其配置的映射到实体)。
这仅适用于SqlSessionFactory
中的方法。其他方法不能像这样工作。
您可以实现一个完整的自定义方法实现,调用MyBatis。
或者,您可以创建一个问题,甚至可以为MyBatis支持的命名查询创建PR。