我在我的项目中使用Hikari库进行MySQL连接。当我尝试运行该程序时,我得到一个ClassNotFoundException:com.mysql.jdbc.jdbc2.optional.MysqlDataSource错误。我想我必须在我的项目中包含mysql-connector库。
这是我的pom.xml
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP-java6</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.18.1-GA</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.5</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty-all</artifactId>
<version>4.1.0.Beta3</version>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
<finalName>GridControl</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifestEntries>
<Main-Class>net.thegridmc.control.GridControl</Main-Class>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>2.3</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<minimizeJar>true</minimizeJar>
<createDependencyReducedPom>false</createDependencyReducedPom>
<artifactSet>
<includes>
<include>mysql:*</include>
<include>org.slf4j:*</include>
<include>com.zaxxer:*</include>
<include>org.javassist:javassist</include>
<include>io.netty:netty-all</include>
</includes>
</artifactSet>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
jar已成功构建,但仍会出现错误。非常感谢任何帮助。谢谢。
试试com.mysql.cj.jdbc.MysqlDataSource
。它适用于
mysql-connector-java 6.0.4
我设法通过将“minimizeJar”设置为false来解决此问题。我不太熟悉maven,所以我不知道这是怎么解决的,但确实如此。
所以在升级Spring
版本后我遇到了同样的问题。问题已经有了正确的答案,但缺乏细节。要连接到数据源(例如:MySQL
),您需要有适当的驱动程序。以前Driver
曾经在com.mysql.jdbc.Driver
,但现在它位于com.mysql.cj.jdbc.Driver
。因此,您需要更新数据源定义。
<bean id="dataSource" class="com.mysql.cj.jdbc.MysqlDataSource"
destroy-method="close">
<property name="url" value="${jdbc.url}" /> <!-- Loaded from application.properties file -->
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxIdle" value="1" />
</bean>
Hikari ehmp:
<bean id="hikariConfig" class="com.zaxxer.hikari.HikariConfig">
<property name="poolName" value="springHikariCP" />
<property name="connectionTestQuery" value="SET NAMES utf8mb4" />
<property name="dataSourceClassName" value="com.mysql.cj.jdbc.MysqlDataSource" />
<property name="dataSourceProperties">
<props>
<prop key="url">${jdbc.url}</prop> <!-- Loaded from application.properties file -->
<prop key="user">${jdbc.username}</prop>
<prop key="password">${jdbc.password}</prop>
</props>
</property>
</bean>
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource"
destroy-method="close">
<constructor-arg ref="hikariConfig" />
</bean>
HikariCP说不使用驱动程序配置,你应该为MySQL定义jdbcUrl:
MySQL Connector / J com.mysql.jdbc.jdbc2.optional.MysqlDataSource
已知MySQL数据源在网络超时支持方面被打破。请改用jdbcUrl配置。