Grails 3.0.9 MySql 连接器答案

【问题标题】：Grails 3.0.9 MySql connectorGrails 3.0.9 MySql 连接器
【发布时间】：2015-11-28 02:17:08
【问题描述】：

我在使用 MySql 和 Grails 3 项目时遇到问题。

我的应用程序.yml

dataSource:
pooled: true
jmxExport: true
driverClassName: com.mysql.jdbc.Driver
dialect: org.hibernate.dialect.MySQL5InnoDBDialect
username: root
password: *****

environments:
    development:
        dataSource:
            dbCreate: create-drop
            url: jdbc:mysql://localhost:3306/mydb

也试过

environments:
development:
    dataSource:
        dbCreate: create-drop
        url: jdbc:mysql://localhost/mydb

我的 Build.gradle

dependencies {
compile "org.springframework.boot:spring-boot-starter-logging"
compile "org.springframework.boot:spring-boot-starter-actuator"
------
runtime 'mysql:mysql-connector-java:5.1.32'

然后做了一个“--refresh-dependencies”

运行项目我得到这个错误：

   ERROR org.apache.tomcat.jdbc.pool.ConnectionPool - Unable to create initial connections of pool.
java.sql.SQLException: com.mysql.jdbc.Driver
    at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:254) ~[tomcat-jdbc-7.0.55.jar:na]
    at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182) ~[tomcat-jdbc-7.0.55.jar:na]
    at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:701) [tomcat-jdbc-7.0.55.jar:na]
    at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:635) [tomcat-jdbc-7.0.55.jar:na]
    at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:486) [tomcat-jdbc-7.0.55.jar:na]
    at org.apache.tomcat.jdbc.pool.ConnectionPool.<init>(ConnectionPool.java:144) [tomcat-jdbc-7.0.55.jar:na]
    at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116) [tomcat-jdbc-7.0.55.jar:na]

我做错了什么？

在 grails2.x 上有一个 lib 文件夹，我可以在其中放置下载的 mysql-connector-java-5.1.32.jar 文件，但在 grails 3.x 上缺少 lib 文件夹。请帮忙。:(

【问题讨论】：

标签： mysql grails

【解决方案1】：

1) 将此添加到 build.gradle

runtime "mysql:mysql-connector-java:5.1.24"

2) 然后在 application.yml 文件中将 H2 数据库替换为类似于这些行

dbCreate: update
driverClassName: com.mysql.jdbc.Driver"
dialect: "org.hibernate.dialect.MySQL5InnoDBDialect"
url: jdbc:mysql://localhost/mydbname?useUnicode=yes&characterEncoding=UTF-8"
username: "myusername"
password: "mypassword"

【讨论】：