Java 驱动程序：org.postgresql。Driver@3ed03652为URL返回null。。。在将spring boot部署到Heroku时

我尝试在Heroku上部署我的应用程序，但有一些错误无法修复 我的应用程序.poperties

    spring.mvc.view.prefix = /WEB-INF/view/
spring.mvc.view.suffix = .jsp

spring.datasource.url = jdbc:postgres://user:pass@ec2-54-247-166-129.eu-west-1.compute.amazonaws.com:5432/database

# Username and password
spring.datasource.username = user
spring.datasource.password = pass

# Keep the connection alive if idle for a long time (needed in production)
spring.datasource.testWhileIdle = true
spring.datasource.validationQuery = SELECT 1

spring.datasource.driverClassName=org.postgresql.Driver

# ===============================
# = JPA / HIBERNATE
# ===============================

# Use spring.jpa.properties.* for Hibernate native properties (the prefix is
# stripped before adding them to the entity manager).

# Show or not log for each sql query
spring.jpa.show-sql = true

# Hibernate ddl auto (create, create-drop, update): with "update" the database
# schema will be automatically updated accordingly to java entities found in
# the project
spring.jpa.hibernate.ddl-auto = update

# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy

# Allows Hibernate to generate SQL optimized for a particular DBMS
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect

我的应用程序类是standart spring启动类，用于应用程序启动

my pom.xml（它的一部分）：

org.springframework.boot
springbootstarter缓存
org.postgresql
postgresql
春天
org.springframework.boot
springbootmaven插件
org.apache.maven.plugins
maven依赖插件
包裹
复制
com.github.jsimone
webapprunner
8.0.30.2
webapp-runner.jar

我收到的错误

> 12:06:42.061  INFO 12352 --- [ost-startStop-1]
> o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter:
> 'applicationContextIdFilter' to: [/*] 2017-03-10 12:06:42.488 ERROR
> 12352 --- [           main] o.a.tomcat.jdbc.pool.ConnectionPool      :
> Unable to create initial connections of pool.
> 
> java.sql.SQLException: Driver:org.postgresql.Driver@760cf594 returned
> null for
> URL:jdbc:postgres://fqwebtafwgsgmp:17ff02102b2660162ce1b053ef28340dfa7cf4d71e14b4bf1b187a8ad7d36579@ec2-54-247-166-129.eu-west-1.compute.amazonaws.com:5432/daapseha11ekml
>   at
> org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:329)
> ~[tomcat-jdbc-8.5.11.jar:na]  at
> org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:203)
> ~[tomcat-jdbc-8.5.11.jar:na]  at
> org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:732)
> [tomcat-jdbc-8.5.11.jar:na]   at
> org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:664)
> [tomcat-jdbc-8.5.11.jar:na]   at
> org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:479)
> [tomcat-jdbc-8.5.11.jar:na]   at
> org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:154)
> [tomcat-jdbc-8.5.11.jar:na]   at
> org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:118)
> [tomcat-jdbc-8.5.11.jar:na]   at

>12:06:42.061信息12352---[ost-startStop-1]
>o.s.b.w.servlet.FilterRegistrationBean:映射筛选器：
>“applicationContextIdFilter”收件人：[/*]2017-03-10 12:06:42.488错误
>12352---[main]o.a.tomcat.jdbc.pool.ConnectionPool:
>无法创建池的初始连接。
> 
>java.sql.SQLException:Driver:org.postgresql。Driver@760cf594返回
>无效
>URL:jdbc:postgres://fqwebtafwgsgmp:17ff02102b2660162ce1b053ef28340dfa7cf4d71e14b4bf1b187a8ad7d36579@ec2-54-247-166-129.eu-west-1.compute.amazonaws.com:5432/daapseha11ekml
>在
>org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver（PooledConnection.java:329）
>~[tomcat-jdbc-8.5.11.jar:na]at
>org.apache.tomcat.jdbc.pool.PooledConnection.connect（PooledConnection.java:203）
>~[tomcat-jdbc-8.5.11.jar:na]at
>org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection（ConnectionPool.java:732）
>[tomcat-jdbc-8.5.11.jar:na]at
>org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection（ConnectionPool.java:664）
>[tomcat-jdbc-8.5.11.jar:na]at
>org.apache.tomcat.jdbc.pool.ConnectionPool.init（ConnectionPool.java:479）
>[tomcat-jdbc-8.5.11.jar:na]at
>org.apache.tomcat.jdbc.pool.ConnectionPool.（ConnectionPool.java:154）
>[tomcat-jdbc-8.5.11.jar:na]at
>org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool（DataSourceProxy.java:118）
>[tomcat-jdbc-8.5.11.jar:na]at

---

如果有人能解释我的错误，我将不胜感激

您的问题可能是您的连接url。您在url中有有效的用户名和密码

将您的

spring.datasource

设置更改为：

spring.datasource.url = jdbc:postgres://ec2-54-247-166-129.eu-west-1.compute.amazonaws.com:5432/database

# Username and password
spring.datasource.username = user
spring.datasource.password = pass

---

另外，我尝试并连接到您的db实例，以便尽快更改它们。

您在jdbc URL中使用的是

jdbc:postgres

，而不是

jdbc:postgresql

（请注意额外的

ql

）

Heroku已经为您设置了

SPRING\u DATASOURCE\u URL

环境变量，因此您应该能够完全删除

application.properties中的
SPRING.DATASOURCE
条目

如果无法删除它们，请尝试：

spring.datasource.url=${JDBC_DATABASE_URL}

如果这不起作用，那一定意味着您没有使用Java buildpack或其他东西

另外，请确保运行：

heroku pg:credentials --reset

使用Spring Boot:2.3.4和驱动程序版本：42.2.18

性质

spring:
    datasource:
        password: ${RDBMS_PASSWORD:pass}
        driver-class-name: org.postgresql.Driver
        url: jdbc:postgresql://${DATABASE_HOST:ec2-54-217-213-79.eu-west-1.compute.amazonaws.com}:${DATABASE_PORT:5432}/${DATABASE_NAME:dbName}?sslmode=require
        username: ${DATABASE_USER:user}
        initialization-mode: always
        initialize: true
        schema: classpath:/schema.sql
        data: classpath:/data.sql
    jpa:
        hibernate:
            ddl-auto: none
        show-sql: true
        generate-ddl: false
        properties:
            hibernate:
                dialect: org.hibernate.dialect.MySQL5InnoDBDialect

请注意url:jdbc:postgresql://

Run
heroku pg:credentials--reset
asap URL中的用户名和密码是可以接受的。问题是
postgres
而不是
postgresql
非常感谢。我真的很想念字符串末尾的ql）我花了几乎一天的时间解决这个问题并上网搜索答案。非常感谢。还有一个注意事项，您应该在url中包含sslmode=require，以便使用heroku
spring:
    datasource:
        password: ${RDBMS_PASSWORD:pass}
        driver-class-name: org.postgresql.Driver
        url: jdbc:postgresql://${DATABASE_HOST:ec2-54-217-213-79.eu-west-1.compute.amazonaws.com}:${DATABASE_PORT:5432}/${DATABASE_NAME:dbName}?sslmode=require
        username: ${DATABASE_USER:user}
        initialization-mode: always
        initialize: true
        schema: classpath:/schema.sql
        data: classpath:/data.sql
    jpa:
        hibernate:
            ddl-auto: none
        show-sql: true
        generate-ddl: false
        properties:
            hibernate:
                dialect: org.hibernate.dialect.MySQL5InnoDBDialect