springboot+mybatis多数据源最简解决方案
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说起多数据源,一般都来解决那些问题呢,主从模式或者业务比较复杂需要连接不同的分库来支持业务。本文是本站小编搜索整理的关于springboot+mybatis多数据源最简解决方案,供参考学习,希望对大家有所帮助!想了解更多相关信息请持续关注我们应届毕业生考试网!
配置文件
pom包就不贴了比较简单该依赖的就依赖,主要是数据库这边的'配置:
ig-locations=classpath:mybatis/
erClassName = er
= jdbc:mysql://localhost:3306/test1?useUnicode=true&characterEncoding=utf-8
name = root
word = root
erClassName = er
= jdbc:mysql://localhost:3306/test2?useUnicode=true&characterEncoding=utf-8
name = root
word = root
一个test1库和一个test2库,其中test1位主库,在使用的过程中必须制定主库,不然会报错。
数据源配置
@Configuration
@MapperScan(basePackages = "1", sqlSessionTemplateRef = "test1SqlSessionTemplate")
public class DataSource1Config {
@Bean(name = "test1DataSource")
@ConfigurationProperties(prefix = "1")
@Primary
public DataSource testDataSource() {
return te()d();
}
@Bean(name = "test1SqlSessionFactory")
@Primary
public SqlSessionFactory testSqlSessionFactory(@Qualifier("test1DataSource") DataSource dataSource) throws Exception {
SqlSessionFactoryBean bean = new SqlSessionFactoryBean();
ataSource(dataSource);
apperLocations(new PathMatchingResourcePatternResolver()esources("classpath:mybatis/mapper/test1/*"));
return bject();
}
@Bean(name = "test1TransactionManager")
@Primary
public DataSourceTransactionManager testTransactionManager(@Qualifier("test1DataSource") DataSource dataSource) {
return new DataSourceTransactionManager(dataSource);
}
@Bean(name = "test1SqlSessionTemplate")
@Primary
public SqlSessionTemplate testSqlSessionTemplate(@Qualifier("test1SqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception {
return new SqlSessionTemplate(sqlSessionFactory);
}
}
最关键的地方就是这块了,一层一层注入,先创建DataSource,在创建SqlSessionFactory在创建事务,最后包装到SqlSessionTemplate中。其中需要制定分库的mapper文件地址,以及分库到层代码
复制代码 代码如下:
@MapperScan(basePackages = "1", sqlSessionTemplateRef = "test1SqlSessionTemplate")
这块的注解就是指明了扫描dao层,并且给dao层注入指定的SqlSessionTemplate。所有@Bean都需要按照命名指定正确。
dao层和xml层
dao层和xml需要按照库来分在不同的目录,比如:test1库dao层在1包下,test2库在1
public interface User1Mapper {
List<UserEntity> getAll();
UserEntity getOne(Long id);
void insert(UserEntity user);
void update(UserEntity user);
void delete(Long id);
}
xml层
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-///DTD Mapper 3.0//EN" "" >
<mapper namespace="1Mapper" >
<resultMap id="BaseResultMap" type="Entity" >
<id column="id" property="id" jdbcType="BIGINT" />
<result column="userName" property="userName" jdbcType="VARCHAR" />
<result column="passWord" property="passWord" jdbcType="VARCHAR" />
<result column="user_sex" property="userSex" javaType="SexEnum"/>
<result column="nick_name" property="nickName" jdbcType="VARCHAR" />
</resultMap>
<sql id="Base_Column_List" >
id, userName, passWord, user_sex, nick_name
</sql>
<select id="getAll" resultMap="BaseResultMap" >
SELECT
<include refid="Base_Column_List" />
FROM users
</select>
<select id="getOne" parameterType="" resultMap="BaseResultMap" >
SELECT
<include refid="Base_Column_List" />
FROM users
WHERE id = #{id}
</select>
<insert id="insert" parameterType="Entity" >
INSERT INTO
users
(userName,passWord,user_sex)
VALUES
(#{userName}, #{passWord}, #{userSex})
</insert>
<update id="update" parameterType="Entity" >
UPDATE
users
SET
<if test="userName != null">userName = #{userName},</if>
<if test="passWord != null">passWord = #{passWord},</if>
nick_name = #{nickName}
WHERE
id = #{id}
</update>
<delete id="delete" parameterType="" >
DELETE FROM
users
WHERE
id =#{id}
</delete>
</mapper>
测试
测试可以使用SpringBootTest,也可以放到Controller中,这里只贴Controller层的使用
@RestController
public class UserController {
@Autowired
private User1Mapper user1Mapper;
@Autowired
private User2Mapper user2Mapper;
@RequestMapping("/getUsers")
public List<UserEntity> getUsers() {
List<UserEntity> users=ll();
return users;
}
@RequestMapping("/getUser")
public UserEntity getUser(Long id) {
UserEntity user=ne(id);
return user;
}
@RequestMapping("/add")
public void save(UserEntity user) {
rt(user);
}
@RequestMapping(value="update")
public void update(UserEntity user) {
te(user);
}
@RequestMapping(value="/delete/{id}")
public void delete(@PathVariable("id") Long id) {
te(id);
}
}
最后源码地址在这里spring-boot-mybatis-mulidatasource
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