connector | 易学教程

Spark Datastax Java API Select statements

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问题 I'm using a tutorial here in this Github to run spark on cassandra using a java maven project: https://github.com/datastax/spark-cassandra-connector. I've figured how to use direct CQL statements, as I have previously asked a question about that here: Querying Data in Cassandra via Spark in a Java Maven Project However, now I'm trying to use the datastax java API in fear that my original code in my original question will not work for Datastax version of Spark and Cassandra. For some weird

用tomcat搭建https

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HTTPS，安全的http连接，并且苹果也宣布，在将来他们将不在支持http，所有的链接均走https。这里借助jdk的工具和tomcat服务器，搭建一个HTTPS的服务器 1、进入java jdk的bin目录，运行keytool工具 keytool有如下参数可以运行以下命令 keytool -genkey -alias tomcat -keyalg RSA -keystore D:tmp\tomcat 【解释：生成的文件名为 tomcat,https利用的非对称加密算法为RSA,把文件生成在D:tmp/目录下】逐步按照提示填写相关信息然后在我的D盘中生成了一个文件 tomcat 至此，证书已经生成完毕，接下来配置tomcat，使之支持https，本次测试中用的tomcat版本为tomcat7 2、配置tomcat 路径：apache-tomcat-7.0.54\conf\server.xml文件修改Connector 8443的相关配置原始文件为 <Connector port="8080" protocol="HTTP/1.1" connectionTimeout="20000" redirectPort="8443" /> 修改为： <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"

Connection Java-MySql : Public Key Retrieval is not allowed

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问题 I try to connect MySql database with Java using connector 8.0.11. Everything seems to be ok but I have this exception: Exception in thread "main" java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed Stack Trace: Exception in thread "main" java.sql.SQLNonTransientConnectionException: Public Key Retrieval is not allowed at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:108) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError

Creating Java Connector for pervasive

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问题 CAN any one please tel me, how to create a connector for pervasive in java. I am very new to this,from where i need t start i am not sure, can any1 please tell me how can i create a connector for pervasive.i created a sample connector , but i am not sure whether it is right or wrong 回答1: Here's a simple program I have that works for me to connect to a PSQL database: /* * SQLStatement.java * Simple JDBC Sample using Pervasive JDBC driver. */ import java.*; import java.sql.*; import pervasive

MySQL Database Connection With Visual Studio 2013 Preview

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问题 I was using Visual Studio 2013 Preview but I couldn't find MySQL database in the "choose data source" dialog window, I even installed the latest version of MySQL connector as well as the windows MySQL installer (to get MySQL plugin for visual studio) but nothing changed, I had to get back to VS 2012 Ultimate, I just wanted to know if there is a special MySQL connector for the 2013 Preview Edition? 回答1: I am using Visual Studio 2013 Ultimate and I got it working with the Mysql Visual Studio 1

Stumped SQL Exception for JDBC

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问题 I'm trying all I can to get a JDBC to work, the only thing that is stumping me right now is this exception, which I have no idea about: com.mysql.jdbc.exceptions.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '????????????????' at line 1 com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1049) com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3593) com.mysql.jdbc.MysqlIO