Canal是一种开源的MySQL数据同步工具，它可以将MySQL的数据异步复制到Kafka、RocketMQ等消息中间件中。以下是在Windows系统下安装Canal的方法：
下载并安装Java SE环境，可在官网下载JDK安装包，安装过程中记得将Java添加到环境变量中。
2. 下载Canal Server，建议下载最新的版本。下载地址：https://github.com/alibaba/canal/releases
3. 解压Canal Server安装包，进入bin目录，双击startup.bat启动Canal Server，启动成功后会弹出一个命令行窗口。
4. 接下来可以通过Canal的客户端进行访问和使用。可在Java工程中添加Canal的客户端依赖，如maven依赖：
```
com.alibaba.otter
canal.client
1.1.4
```
配置Canal Server，可通过修改conf目录下的instance.properties文件来配置Canal实例。例如：
```
canal.instance.master.address=127.0.0.1:3306
canal.instance.dbUsername=root
canal.instance.dbPassword=root
canal.instance.connectionCharset=UTF-8
canal.instance.filter.regex=mytest\\..*
canal.instance.tsdb.enable=true
canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
canal.instance.tsdb.dbUsername=canal
canal.instance.tsdb.dbPassword=canal
```
启动Canal客户端，可参考以下代码：
```
import com.alibaba.otter.canal.client.CanalConnector;
import com.alibaba.otter.canal.client.CanalConnectors;
import com.alibaba.otter.canal.protocol.Message;
import java.net.InetSocketAddress;
import java.util.List;public class CanalClientSample {
public static void main(String args[]) {
// 创建链接
CanalConnector connector = CanalConnectors.newSingleConnector(
new InetSocketAddress("127.0.0.1", 11111), "example", "", "");
int batchSize = 1000;
try {
connector.connect();
connector.subscribe(".*\\..*");
connector.rollback();
while (true) {
Message message = connector.getWithoutAck(batchSize);
long batchId = message.getId();
int size = message.getEntries().size();
if (batchId == -1 || size == 0) {
Thread.sleep(100);
} else {
printEntries(message.getEntries());
}
connector.ack(batchId);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
connector.disconnect();
}
}private static void printEntries(List
entrys) {
for (Entry entry : entrys) {
if (entry.getEntryType() == EntryType.TRANSACTIONBEGIN
|| entry.getEntryType() == EntryType.TRANSACTIONEND) {
continue;
}RowChange rowChage = null;
try {
ByteString byteString = entry.getStoreValue();
rowChage = RowChange.parseFrom(byteString);
} catch (Exception e) {
throw new RuntimeException("ERROR ## parser of eromanga-event has an error", e);
}
EventType eventType = rowChage.getEventType();
System.out.println(String.format("================> binlog[%s:%s] , name[%s,%s] , eventType : %s",
entry.getHeader().getLogfileName(), entry.getHeader().getLogfileOffset(),
entry.getHeader().getSchemaName(), entry.getHeader().getTableName(),
eventType));
for (RowData rowData : rowChage.getRowDatasList()) {
if (eventType == EventType.DELETE) {
printColumn(rowData.getBeforeColumnsList());
} else if (eventType == EventType.INSERT) {
printColumn(rowData.getAfterColumnsList());
} else {
System.out.println("-------> before");
printColumn(rowData.getBeforeColumnsList());
System.out.println("-------> after");
printColumn(rowData.getAfterColumnsList());
}
}
}
}private static void printColumn(List
columns) {
for (Column column : columns) {
System.out.println(column.getName() + " : " + column.getValue() + " update=" + column.getUpdated());
}
}
}
```
以上就是在Windows系统下安装Canal的方法。
来源地址：https://blog.csdn.net/benbenqing555/article/details/129792028
