# shardingjdbc分片策略
# 配置数据源,给数据源起名称,
# 水平分库,配置两个数据源
spring.shardingsphere.datasource.names=m1,m2,m0,s0
# 一个实体类对应两张表,覆盖
spring.main.allow-bean-definition-overriding=true
#配置第一个数据源具体内容,包含连接池,驱动,地址,用户名和密码
spring.shardingsphere.datasource.m1.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.m1.driver-class-name=com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.m1.url=jdbc:mysql://localhost:3306/edu_db_1?serverTimezone=GMT%2B8
spring.shardingsphere.datasource.m1.username=root
spring.shardingsphere.datasource.m1.password=Mima123456
#配置第二个数据源具体内容,包含连接池,驱动,地址,用户名和密码
spring.shardingsphere.datasource.m2.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.m2.driver-class-name=com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.m2.url=jdbc:mysql://localhost:3306/edu_db_2?serverTimezone=GMT%2B8
spring.shardingsphere.datasource.m2.username=root
spring.shardingsphere.datasource.m2.password=Mima123456
#配置第三个数据源具体内容,包含连接池,驱动,地址,用户名和密码
# user_db主服务器
spring.shardingsphere.datasource.m0.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.m0.driver-class-name=com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.m0.url=jdbc:mysql://localhost:3306/user_db?serverTimezone=GMT%2B8
spring.shardingsphere.datasource.m0.username=root
spring.shardingsphere.datasource.m0.password=Mima123456
# user_db 从服务器
spring.shardingsphere.datasource.s0.type=com.alibaba.druid.pool.DruidDataSource
spring.shardingsphere.datasource.s0.driver-class-name=com.mysql.cj.jdbc.Driver
spring.shardingsphere.datasource.s0.url=jdbc:mysql://localhost:3307/user_db?serverTimezone=GMT%2B8
spring.shardingsphere.datasource.s0.username=root
spring.shardingsphere.datasource.s0.password=Mima123456
# 主库从库逻辑数据源定义 ds0 为 user_db
spring.shardingsphere.sharding.master-slave-rules.ds0.master-data-source-name=m0
spring.shardingsphere.sharding.master-slave-rules.ds0.slave-data-source-names=s0
# 配置 user_db 数据库里面 t_user 专库专表
#spring.shardingsphere.sharding.tables.t_user.actual-data-nodes=m$->{0}.t_user
# t_user 分表策略,固定分配至 ds0 的 t_user 真实表
spring.shardingsphere.sharding.tables.t_user.actual-data-nodes=ds0.t_user
# 配置公共表
spring.shardingsphere.sharding.broadcast-tables=t_udict
spring.shardingsphere.sharding.tables.t_udict.key-generator.column=dictid
spring.shardingsphere.sharding.tables.t_udict.key-generator.type=SNOWFLAKE
# 指定course表里面主键cid 生成策略 SNOWFLAKE
spring.shardingsphere.sharding.tables.t_user.key-generator.column=user_id
spring.shardingsphere.sharding.tables.t_user.key-generator.type=SNOWFLAKE
# 指定表分片策略 约定cid值偶数添加到course_1表,如果cid是奇数添加到course_2表
spring.shardingsphere.sharding.tables.t_user.table-strategy.inline.sharding-column=user_id
spring.shardingsphere.sharding.tables.t_user.table-strategy.inline.algorithm-expression=t_user
#指定数据库分布情况,数据库里面表分布情况
# m1 m2 course_1 course_2
spring.shardingsphere.sharding.tables.course.actual-data-nodes=m$->{1..2}.course_$->{1..2}
# 指定course表里面主键cid 生成策略 SNOWFLAKE
spring.shardingsphere.sharding.tables.course.key-generator.column=cid
spring.shardingsphere.sharding.tables.course.key-generator.type=SNOWFLAKE
# 指定表分片策略 约定cid值偶数添加到course_1表,如果cid是奇数添加到course_2表
spring.shardingsphere.sharding.tables.course.table-strategy.inline.sharding-column=cid
spring.shardingsphere.sharding.tables.course.table-strategy.inline.algorithm-expression=course_$->{cid % 2 + 1}
# 指定数据库分片策略 约定user_id是偶数添加m1,是奇数添加m2
#spring.shardingsphere.sharding.default-database-strategy.inline.sharding-column=user_id
#spring.shardingsphere.sharding.default-database-strategy.inline.algorithm-expression=m$->{user_id % 2 + 1}
spring.shardingsphere.sharding.tables.course.database-strategy.inline..sharding-column=user_id
spring.shardingsphere.sharding.tables.course.database-strategy.inline.algorithm-expression=m$->{user_id % 2 + 1}
# 打开sql输出日志
spring.shardingsphere.props.sql.show=true
// 添加操作
@Test
public void addUserDb() {
User user = new User();
user.setUsername("cakin");
user.setUstatus("m");
userMapper.insert(user);
}
// 查询操作
@Test
public void findUserDb() {
QueryWrapper<User> wrapper = new QueryWrapper<>();
// 设置userid值
wrapper.eq("user_id", 664902067889897473L);
User user = userMapper.selectOne(wrapper);
System.out.println(user);
}
1 增加
2021-11-09 18:43:26.310 INFO 10744 --- [ main] ShardingSphere-SQL : Actual SQL: m0 ::: INSERT INTO t_user (username, ustatus, user_id) VALUES (?, ?, ?) ::: [cakin, m, 664902067889897473]
2 查询
2021-11-09 18:48:18.784 INFO 19496 --- [ main] ShardingSphere-SQL : Actual SQL: s0 ::: SELECT user_id,username,ustatus FROM t_user
WHERE user_id = ? ::: [664902067889897473]
User(userId=664902067889897473, username=cakin, ustatus=m)
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