【发布时间】:2018-06-15 09:01:30
【问题描述】:
我正在尝试使用我的 Java 代码连接到 Amazon Redshift 数据库。我在 AWS 网站上找到了一个应该可以工作的代码 sn-p。但是,我在实现 JDBC 驱动程序时遇到了问题。 这是网站和来自网站的代码:https://docs.aws.amazon.com/redshift/latest/mgmt/connecting-in-code.html
package connection;
import java.sql.*;
import java.util.Properties;
public class Docs {
//Redshift driver: "jdbc:redshift://x.y.us-west-
2.redshift.amazonaws.com:5439/dev";
//or "jdbc:postgresql://x.y.us-west-2.redshift.amazonaws.com:5439/dev";
static final String dbURL = "***jdbc cluster connection string ****";
static final String MasterUsername = "***master user name***";
static final String MasterUserPassword = "***master user password***";
public static void main(String[] args) {
Connection conn = null;
Statement stmt = null;
try{
//Dynamically load driver at runtime.
//Redshift JDBC 4.1 driver: com.amazon.redshift.jdbc41.Driver
//Redshift JDBC 4 driver: com.amazon.redshift.jdbc4.Driver
Class.forName("com.amazon.redshift.jdbc.Driver");
//Open a connection and define properties.
System.out.println("Connecting to database...");
Properties props = new Properties();
//Uncomment the following line if using a keystore.
//props.setProperty("ssl", "true");
props.setProperty("user", MasterUsername);
props.setProperty("password", MasterUserPassword);
conn = DriverManager.getConnection(dbURL, props);
//Try a simple query.
System.out.println("Listing system tables...");
stmt = conn.createStatement();
String sql;
sql = "select * from information_schema.tables;";
ResultSet rs = stmt.executeQuery(sql);
//Get the data from the result set.
while(rs.next()){
//Retrieve two columns.
String catalog = rs.getString("table_catalog");
String name = rs.getString("table_name");
//Display values.
System.out.print("Catalog: " + catalog);
System.out.println(", Name: " + name);
}
rs.close();
stmt.close();
conn.close();
}catch(Exception ex){
//For convenience, handle all errors here.
ex.printStackTrace();
}finally{
//Finally block to close resources.
try{
if(stmt!=null)
stmt.close();
}catch(Exception ex){
}// nothing we can do
try{
if(conn!=null)
conn.close();
}catch(Exception ex){
ex.printStackTrace();
}
}
System.out.println("Finished connectivity test.");
}
}
我获得了连接凭据,但出现以下错误。
java.lang.ClassNotFoundException: com.amazon.redshift.jdbc4.Driver
这是由这一行引起的:
Class.forName("com.amazon.redshift.jdbc.Driver");
我没有在任何地方实现这个驱动程序,所以这个错误是有道理的。问题是 IntelliJ IDEA 有一个插件(数据库导航器)不能按预期工作,我无法在他们的论坛上获得任何帮助。
是否还有其他包含 JDBC 驱动程序以便代码可以使用它(在 IntelliJ 中)?
编辑:
将 JAR 添加为外部库后,我的项目如下所示:
但是,当我运行代码时,我得到了同样的错误。
【问题讨论】:
-
用这个来连接 Db
DriverManager.registerDriver(new com.amazon.redshift.jdbc42.Driver()); Properties properties = new Properties(); properties.setProperty("user", MasterUsername); properties.setProperty("password", MasterUserPassword); this.connection = DriverManager.getConnection(this.READ_SHIFT_URL, properties);
标签: java intellij-idea jdbc amazon-redshift intellij-plugin