JDBC CallableStatement：java.sql.SQLException：指定为定义程序的用户（'mysql.infoschema'@'localhost'）不存在

Question

我刚开始联系JDBC，遇到了有关CallableStatement的问题，这是我的代码：

    Connection connection=null;
    CallableStatement statement=null;

    try {
        connection = DriverManager.getConnection(DBTools.getDbUrl(), DBTools.getUSER(),DBTools.getPASSWD());
        String getNameSQL="{call getName (?,?)}";
        statement=connection.prepareCall(getNameSQL);
        int empID=103;
        String empName;
        statement.setInt(1,empID);
        statement.registerOutParameter(2, Types.VARCHAR);
        System.out.println("Execute: "+statement.execute());
        empName=statement.getString(2);
        System.out.println("Emp Name with ID:" + empID + " is " + empName);
        statement.close();
        connection.close();
    } catch (SQLException e) {
        e.printStackTrace();
    }

其控制台输出为：

java.sql.SQLException: The user specified as a definer ('mysql.infoschema'@'localhost') does not exist
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:129)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:970)
at com.mysql.cj.jdbc.ClientPreparedStatement.executeQuery(ClientPreparedStatement.java:1020)
at com.mysql.cj.jdbc.DatabaseMetaDataUsingInfoSchema.executeMetadataQuery(DatabaseMetaDataUsingInfoSchema.java:70)
at com.mysql.cj.jdbc.DatabaseMetaDataUsingInfoSchema.getProcedureColumns(DatabaseMetaDataUsingInfoSchema.java:769)
at com.mysql.cj.jdbc.CallableStatement.determineParameterTypes(CallableStatement.java:790)
at com.mysql.cj.jdbc.CallableStatement.<init>(CallableStatement.java:585)
at com.mysql.cj.jdbc.CallableStatement.getInstance(CallableStatement.java:484)
at com.mysql.cj.jdbc.ConnectionImpl.parseCallableStatement(ConnectionImpl.java:1523)
at com.mysql.cj.jdbc.ConnectionImpl.prepareCall(ConnectionImpl.java:1548)
at com.mysql.cj.jdbc.ConnectionImpl.prepareCall(ConnectionImpl.java:1539)
at main.JDBCCallableStatement.main(JDBCCallableStatement.java:13)

第13行是：statement = connection.prepareCall（getNameSQL）;

我确定mysql函数getName（）已创建并且运行良好，看来问题出在Connection上，但我不知道如何解决它，希望您能给我一些建议。