Flink读取Mysql数据库

Flink操作数据库并没有像Spark那样简洁方便，有点类似java操作mysql的思路。
pom依赖

    <dependencies>
    	<dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-scala_2.11</artifactId>
            <version>1.7.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-jdbc_2.11</artifactId>
            <version>1.9.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.44</version>
        </dependency>
    </dependencies>

读写Mysql代码

package FlinkMysql

import org.apache.flink.api.common.typeinfo.BasicTypeInfo
import org.apache.flink.api.java.io.jdbc.{JDBCInputFormat, JDBCOutputFormat}
import org.apache.flink.api.java.typeutils.RowTypeInfo
import org.apache.flink.api.scala._
import org.apache.flink.types.Row

object FlinkConnectMysql {
  def main(args: Array[String]): Unit = {
    val env = ExecutionEnvironment.getExecutionEnvironment
//连接Mysql的参数
    val driver = "com.mysql.jdbc.Driver"
    val url = "jdbc:mysql://localhost:3306/selftest"
    val user = "root"
    val password = "123456"
    val sqlRead = "select * from t_offset"
    val sqlWrite = "insert into ttt(id,types) values(?,?)"
    //调用读取数据方法
    readMysql(env,url,driver,user,password,sqlRead)
    //要插入Mysql的数据
    val value: DataSet[Row] = env.fromElements((11, "A,B,C,D,E.F.G"))
      .map(t => {
        val row = new Row(2)
        row.setField(0, t._1)
        row.setField(1, t._2)
        row
      })
      //调用写入Mysql的方法
writeMysql(env,value,driver,url,user,password,sqlWrite)

    env.execute("mysql job")
  }
  def readMysql(env: ExecutionEnvironment, url: String, driver: String, user: String, pwd: String, sql: String) = {
    val dataResult: DataSet[Row] = env.createInput(JDBCInputFormat.buildJDBCInputFormat()
      .setDrivername(driver)
      .setDBUrl(url)
      .setUsername(user)
      .setPassword(pwd)
      .setQuery(sql)
      .setRowTypeInfo(new RowTypeInfo(
        BasicTypeInfo.STRING_TYPE_INFO,
        BasicTypeInfo.STRING_TYPE_INFO,
        BasicTypeInfo.INT_TYPE_INFO,
        BasicTypeInfo.INT_TYPE_INFO))
      .finish())
    dataResult.print()
  }

  def writeMysql(env: ExecutionEnvironment, outputData: DataSet[Row],driver:String, url: String, user: String, pwd: String, sql: String) = {
    outputData.output(JDBCOutputFormat.buildJDBCOutputFormat()
      .setDrivername(driver)
      .setDBUrl(url)
      .setUsername(user)
      .setPassword(pwd)
      .setQuery(sql)
      .finish())
    env.execute("insert into mysql job")
    print("data write successfully")
  }

}