springboot多模块化整合mybatis，出现mapper自动注入失败问题 - 好文

问题：

启动类添加@MapperScan或@ComponentScan，mapper类添加@Mapper或@Repository

==> Consider defining a bean of type 'com.ten.mapper.UserMapper' in your
configuration.

或

Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required in spring
mock mvc test for spring boot with mybatis

解决：

手动装配dataSource

启动类:
package com.ten; import com.alibaba.druid.pool.DruidDataSource; import
org.mybatis.spring.annotation.MapperScan; import
org.springframework.beans.factory.annotation.Autowired; import
org.springframework.boot.SpringApplication; import
org.springframework.boot.autoconfigure.EnableAutoConfiguration; import
org.springframework.boot.autoconfigure.SpringBootApplication; import
org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; import
org.springframework.context.annotation.Bean; import
org.springframework.context.annotation.ComponentScan; import
org.springframework.core.env.Environment; import
org.springframework.stereotype.Component; import javax.sql.DataSource;
@SpringBootApplication @EnableAutoConfiguration(exclude =
{DataSourceAutoConfiguration.class}) @MapperScan("com.ten.mapper") class
LcWebApplication { public static void main(String[] args) {
SpringApplication.run(LcWebApplication.class, args); } @Autowired private
Environment env;
//destroy-method="close"的作用是当数据库连接不使用的时候,就把该连接重新放到数据池中,方便下次使用调用. @Bean public
DataSource dataSource() { DruidDataSource dataSource = new DruidDataSource();
dataSource.setUrl(env.getProperty("spring.datasource.url"));
dataSource.setUsername(env.getProperty("spring.datasource.username"));//用户名
dataSource.setPassword(env.getProperty("spring.datasource.password"));//密码
dataSource.setDriverClassName(env.getProperty("spring.datasource.driver-class-name"));
dataSource.setInitialSize(2);//初始化时建立物理连接的个数
dataSource.setMaxActive(20);//最大连接池数量 dataSource.setMinIdle(0);//最小连接池数量
dataSource.setMaxWait(60000);//获取连接时最大等待时间，单位毫秒。
dataSource.setValidationQuery("SELECT 1");//用来检测连接是否有效的sql
dataSource.setTestOnBorrow(false);//申请连接时执行validationQuery检测连接是否有效
dataSource.setTestWhileIdle(true);//建议配置为true，不影响性能，并且保证安全性。
dataSource.setPoolPreparedStatements(false);//是否缓存preparedStatement，也就是PSCache
return dataSource; } }
启动类配置文件：
spring: datasource: name: test url: jdbc:mysql://localhost:3306/db username:
root password: root # 使用druid数据源 type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver filters: stat maxActive: 20
initialSize: 1 maxWait: 60000 minIdle: 1 timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000 validationQuery: select 'x' testWhileIdle:
true testOnBorrow: false testOnReturn: false poolPreparedStatements: true
maxOpenPreparedStatements: 20 mybatis: mapperLocations: classpath*:mapper/*.xml
typeAliasesPackage: com.ten.entity
启动类依赖
 <dependency> <groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId> </dependency> 
<dependency> <groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId> </dependency>  <dependency> <groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId> </dependency> <dependency>
<groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId>
</dependency> 
<dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId>
</dependency>
DAO类
@Repository public interface UserMapper { String getTest(String test); }
DAO类依赖
 <dependency> <groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId> </dependency>
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