springboot+mybatis多數據源最簡解決方案

説起多數據源，一般都來解決那些問題呢，主從模式或者業務比較複雜需要連接不同的分庫來支持業務。本文是本站小編搜索整理的關於springboot+mybatis多數據源最簡解決方案，供參考學習，希望對大家有所幫助!想了解更多相關信息請持續關注我們應屆畢業生考試網!

　　配置文件

pom包就不貼了比較簡單該依賴的就依賴，主要是數據庫這邊的'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

一個test1庫和一個test2庫，其中test1位主庫，在使用的過程中必須制定主庫，不然會報錯。

　　數據源配置

@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);

}

}

最關鍵的地方就是這塊了，一層一層注入,先創建DataSource，在創建SqlSessionFactory在創建事務，最後包裝到SqlSessionTemplate中。其中需要制定分庫的mapper文件地址，以及分庫到層代碼

複製代碼 代碼如下:

@MapperScan(basePackages = "1", sqlSessionTemplateRef = "test1SqlSessionTemplate")

這塊的註解就是指明瞭掃描dao層，並且給dao層注入指定的SqlSessionTemplate。所有@Bean都需要按照命名指定正確。

dao層和xml層

dao層和xml需要按照庫來分在不同的目錄，比如：test1庫dao層在1包下，test2庫在1

public interface User1Mapper {

List<UserEntity> getAll();

UserEntity getOne(Long id);

void insert(UserEntity user);

void update(UserEntity user);

void delete(Long id);

}

xml層

<?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>

　　測試

測試可以使用SpringBootTest,也可以放到Controller中，這裏只貼Controller層的使用

@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);

}

}

最後源碼地址在這裏spring-boot-mybatis-mulidatasource

Java中的裝箱和拆箱深入理解