使用flink读取Mysql
时间: 2023-06-30 22:12:56 浏览: 150
可以使用Flink的JDBC connector来读取MySQL数据。具体步骤如下:
1. 在pom.xml中添加以下依赖:
```
<dependency>
<groupId>org.apache.flink</groupId>
<artifactId>flink-jdbc_2.11</artifactId>
<version>${flink.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
```
其中,`${flink.version}`和`${mysql.version}`分别为Flink和MySQL的版本号。
2. 在Flink程序中,使用JDBCInputFormat读取MySQL数据。示例如下:
```
StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
JDBCInputFormat jdbcInputFormat = JDBCInputFormat.buildJDBCInputFormat()
.setDrivername("com.mysql.jdbc.Driver")
.setDBUrl("jdbc:mysql://localhost:3306/test")
.setUsername("root")
.setPassword("password")
.setQuery("SELECT * FROM my_table")
.setRowTypeInfo(new RowTypeInfo(...))
.finish();
DataStreamSource<Row> source = env.createInput(jdbcInputFormat);
source.print();
env.execute();
```
其中,`setDBUrl()`方法中的`test`为数据库名,`my_table`为表名,`setRowTypeInfo()`方法中需要根据实际情况设置表结构信息。
以上是使用Flink读取MySQL数据的基本步骤,具体实现需要根据实际情况进行调整。
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