Canal+Springboot实现数据同步，全网唯一一个跑通了的案例

以下是一个简化的示例，展示如何在Spring Boot应用中使用Canal实现数据同步：

import com.alibaba.otter.canal.client.CanalConnector;
import com.alibaba.otter.canal.client.CanalConnectors;
import com.alibaba.otter.canal.protocol.Message;
import com.alibaba.otter.canal.protocol.CanalEntry;
import org.springframework.stereotype.Service;
import javax.annotation.PostConstruct;
 
@Service
public class CanalService {
 
    @PostConstruct
    public void startCanal() {
        // 连接到Canal Server
        CanalConnector connector = CanalConnectors.newSingleConnector(
                new InetSocketAddress(AddressUtils.getHostIp(),
                11111), "example", "", "");
 
        int batchSize = 1000;
        try {
            connector.connect();
            connector.subscribe(".*\\..*");
            connector.rollback();
            while (true) {
                Message message = connector.getWithoutAck(batchSize); // 获取指定数量的数据
                long batchId = message.getId();
                if (batchId == -1 || message.getEntries().isEmpty()) {
                    // 没有数据，休眠一会儿
                    Thread.sleep(1000);
                } else {
                    dataHandle(message.getEntries());
                    connector.ack(batchId); // 确认消息消费成功
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            connector.disconnect();
        }
    }
 
    private void dataHandle(List<CanalEntry.Entry> entrys) {
        for (CanalEntry.Entry entry : entrys) {
            if (entry.getEntryType() == CanalEntry.EntryType.TRANSACTIONBEGIN || entry.getEntryType() == CanalEntry.EntryType.TRANSACTIONEND) {
                continue;
            }
            CanalEntry.RowChange rowChage = CanalEntry.RowChange.parseFrom(entry.getStoreValue());
            switch (rowChage.getEventType()) {
                case INSERT:
                    handleInsert(rowChage);
                    break;
                case UPDATE:
                    handleUpdate(rowChage);
                    break;
                case DELETE:
                    handleDelete(rowChage);