我可以通过 sqldeveloper 连接到 AWS RDS，但不能通过 Java 应用程序

Question

太奇怪了，我可以用 sqldeveloper 连接到 AWS RDS，但不能用我的 java 应用程序（java 源代码或 jsp）

当我尝试访问 RDS 时，出现如下错误：

coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"]
26-Jun-2018 04:24:33.203 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
26-Jun-2018 04:24:33.212 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"]
26-Jun-2018 04:24:33.215 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
26-Jun-2018 04:24:33.219 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 1387 ms
26-Jun-2018 04:24:33.265 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service Catalina
26-Jun-2018 04:24:33.266 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.0.50
26-Jun-2018 04:24:33.286 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /var/lib/tomcat8/webapps/ROOT
26-Jun-2018 04:24:35.020 INFO [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
26-Jun-2018 04:24:35.097 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /var/lib/tomcat8/webapps/ROOT has finished in 1,811 ms
26-Jun-2018 04:24:35.100 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]
26-Jun-2018 04:24:35.106 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
26-Jun-2018 04:24:35.108 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 1888 ms
Loading driver...
Driver loaded!
jdbc:oracle:thin://IP:1521/ORCL?user=username&password=password
SQLException: Invalid Oracle URL specified
SQLState: 99999
VendorError: 17067
Closing the connection.
SQLException: Invalid Oracle URL specified
SQLState: 99999
VendorError: 17067
Closing the connection.

但 URL 与我使用 sqldeveloper 尝试的值相同。

有什么问题吗？

请赐教，因为我已经为此痛苦了大约一个星期！ :(

Answer 1

我不确定您的应用程序是如何设置的，但我使用的是 Maven 和 Spring Boot，并且我的工作方式如下：

我主要遵循本指南，忽略 .sql 文件、thymeleaf UI、“model.addAttribute("cities", city);"部分，以及 html 文件： https://zetcode.com/springboot/postgresql/

我的 application.properties 文件如下所示

postgres.comment.aa=https://zetcode.com/springboot/postgresql/
spring.main.banner-mode=off
logging.level.org.springframework=ERROR

spring.jpa.hibernate.ddl-auto=none

spring.datasource.initialization-mode=always
spring.datasource.platform=postgres
spring.datasource.url=jdbc:postgresql://your-rds-url-here.us-east-1.rds.amazonaws.com:yourDbPortHere/postgres
spring.datasource.username=postgres
spring.datasource.password=<your db password here>

spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true

如果您有自定义架构，可以将“?currentSchema=users”附加到 url：

spring.datasource.url=jdbc:postgresql://your-rds-url-here.us-east-1.rds.amazonaws.com:yourDbPortHere/postgres?currentSchema=users

感谢架构的这个 SO 答案： Is it possible to specify the schema when connecting to postgres with JDBC?

这些其他几个链接也有帮助 https://turreta.com/2015/03/01/how-to-specify-a-default-schema-when-connecting-to-postgresql-using-jdbc/

https://doc.cuba-platform.com/manual-latest/db_schema_connection.html