ShardingSphere-JDBC基本使用参考：【ShardingSphere】ShardingSphere-JDBC 快速入门
主从数据库搭建参考：【Mysql】主从同步配置
读写分离
参考官方文档：https://shardingsphere.apache.org/document/current/cn/user-manual/shardingsphere-jdbc/configuration/java-api/readwrite-splitting/
具体实现，代码如下：
1 /** 2 * 主从配置 3 */ 4 public class ShardingMasterSlaveTest { 5 6 public static void main(String[] args) throws SQLException { 7 ShardingMasterSlaveTest.insert(); 8 ShardingMasterSlaveTest.select(); 9 } 10 11 public static void insert() throws SQLException { 12 // 获取数据源 13 DataSource dataSource = getDataSource(); 14 15 String insertSql1 = "INSERT INTO user VALUES(1, '小白');"; 16 String insertSql2 = "INSERT INTO user VALUES(2, '小黑');"; 17 String insertSql3 = "INSERT INTO user VALUES(3, '小黄');"; 18 String insertSql4 = "INSERT INTO user VALUES(4, '小蓝');"; 19 20 try ( 21 Connection conn = dataSource.getConnection(); 22 PreparedStatement ps = conn.prepareStatement(insertSql2)) { 23 int num = ps.executeUpdate(); 24 System.out.println("num = " + num); 25 } 26 27 } 28 29 30 public static void select() throws SQLException { 31 // 获取数据源 32 DataSource dataSource = getDataSource(); 33 34 String sql = "select * from user"; 35 36 try ( 37 Connection conn = dataSource.getConnection(); 38 PreparedStatement ps = conn.prepareStatement(sql)) { 39 try (ResultSet rs = ps.executeQuery()) { 40 while(rs.next()) { 41 int order_id = rs.getInt(1); 42 String name = rs.getString(2); 43 System.out.println(order_id + "\t" + name); 44 } 45 } 46 } 47 } 48 49 public static DataSource getDataSource() throws SQLException { 50 // 配置真实数据源 51 Map<String, DataSource> dataSourceMap = new HashMap<>(); 52 53 // 配置第 1 个数据源 54 HikariDataSource dataSource1 = new HikariDataSource(); 55 dataSource1.setDriverClassName("com.mysql.cj.jdbc.Driver"); 56 dataSource1.setJdbcUrl("jdbc:mysql://127.0.0.1:3306/test_master_slave?allowPublicKeyRetrieval=true&useSSL=true"); 57 dataSource1.setUsername("root"); 58 dataSource1.setPassword("123"); 59 dataSourceMap.put("ds0", dataSource1); 60 61 // 配置第 2 个数据源 62 HikariDataSource dataSource2 = new HikariDataSource(); 63 dataSource2.setDriverClassName("com.mysql.cj.jdbc.Driver"); 64 dataSource2.setJdbcUrl("jdbc:mysql://127.0.0.1:3306/test_master_slave?allowPublicKeyRetrieval=true&useSSL=true"); 65 dataSource2.setUsername("root"); 66 dataSource2.setPassword("123"); 67 dataSourceMap.put("ds1", dataSource2); 68 69 70 // 读写数据源配置 71 ReadwriteSplittingDataSourceRuleConfiguration dataSourceRuleConfiguration = new ReadwriteSplittingDataSourceRuleConfiguration( 72 "master_slave_db", null, "ds0", Arrays.asList("ds1"), "ROUND_ROBIN"); 73 74 // 读写分离配置 75 ReadwriteSplittingRuleConfiguration readwriteSplittingRuleConfiguration = new ReadwriteSplittingRuleConfiguration( 76 Collections.singleton(dataSourceRuleConfiguration), new HashMap<>()); 77 78 // 创建 ShardingSphereDataSource 79 DataSource dataSource = ShardingSphereDataSourceFactory.createDataSource(dataSourceMap, Collections.singleton(readwriteSplittingRuleConfiguration), new Properties()); 80 81 return dataSource; 82 }
