sringboot如何使用shardingproxy
时间: 2023-07-20 14:40:04 浏览: 40
要在Spring Boot中使用ShardingProxy,需要进行以下步骤:
1. 添加ShardingProxy的依赖,可以在Maven中添加以下配置:
```
<dependency>
<groupId>org.apache.shardingsphere</groupId>
<artifactId>sharding-proxy</artifactId>
<version>${shardingsphere.version}</version>
</dependency>
```
其中`${shardingsphere.version}`表示ShardingSphere的版本号。
2. 在Spring Boot的配置文件中添加ShardingProxy的配置,可以参考以下配置示例:
```
spring:
shardingsphere:
datasource:
names: ds_0, ds_1
ds_0:
url: jdbc:mysql://localhost:3306/db_0
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
ds_1:
url: jdbc:mysql://localhost:3306/db_1
username: root
password: root
driver-class-name: com.mysql.jdbc.Driver
sharding:
binding-tables: user
tables:
user:
actual-data-nodes: ds_${0..1}.user_${0..1}
table-strategy:
inline:
sharding-column: id
algorithm-expression: user_${id % 2}
key-generator:
column: id
type: SNOWFLAKE
```
其中,`datasource`节点下配置数据源的信息,`sharding`节点下配置分片的策略、数据表的信息和ID生成器的类型等。
3. 在Java代码中使用ShardingProxy连接数据库,示例代码如下:
```
@Autowired
private DataSource dataSource;
public void queryData() {
try (Connection conn = dataSource.getConnection();
PreparedStatement ps = conn.prepareStatement("SELECT * FROM user WHERE id = ?")) {
ps.setLong(1, 1);
try (ResultSet rs = ps.executeQuery()) {
while (rs.next()) {
System.out.println(rs.getLong("id"));
System.out.println(rs.getString("name"));
}
}
} catch (SQLException e) {
e.printStackTrace();
}
}
```
这样就可以在Spring Boot中使用ShardingProxy了。