无法获得 JDBC 连接;嵌套异常是 java.sql.SQLException:无法加载 JDBC 驱动程序类 'org.hsql.jdbcDriver'
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【中文标题】无法获得 JDBC 连接;嵌套异常是 java.sql.SQLException:无法加载 JDBC 驱动程序类 \'org.hsql.jdbcDriver\'【英文标题】:Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot load JDBC driver class 'org.hsql.jdbcDriver'无法获得 JDBC 连接;嵌套异常是 java.sql.SQLException:无法加载 JDBC 驱动程序类 'org.hsql.jdbcDriver' 【发布时间】:2015-07-22 10:08:07 【问题描述】:我不确定为什么我无法连接到我的数据库。我正在使用 JNDI 和 maven 来帮助处理依赖项。在 Eclipse 中我的服务器文件夹中的 context.xml 看起来像:
Could not get JDBC Connection; nested exception is java.sql.SQLException:
Cannot load JDBC driver class 'org.hsql.jdbcDriver'
context.xml
<Context>
<!-- Default set of monitored resources. If one of these changes, the -->
<!-- web application will be reloaded. -->
<WatchedResource>WEB-INF/web.xml</WatchedResource>
<WatchedResource>$catalina.base/conf/web.xml</WatchedResource>
<Resource name="jdbc/Spring_Tutorial" auth="Container"
type="javax.sql.DataSource" maxActive="100" maxIdle="30" maxWait="10000"
username="root" driverClassName="org.hsql.jdbcDriver"
url="jdbc:mysql://localhost:3306/Spring_Tutorial" />
<!-- Uncomment this to disable session persistence across Tomcat restarts -->
<!-- <Manager pathname="" /> -->
<!-- Uncomment this to enable Comet connection tacking (provides events
on session expiration as well as webapp lifecycle) -->
<!-- <Valve className="org.apache.catalina.valves.CometConnectionManagerValve"
/> -->
</Context>
如果无法连接,该类会处理错误:
@ControllerAdvice
public class DatabaseErrorHandler
@ExceptionHandler(DataAccessException.class)
public String handleDatabaseException(DataAccessException ex)
System.out.println("Error connecting to Database: "+ex);
return "error";
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.spring.practice</groupId>
<artifactId>offers</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.4</version>
<configuration>
<warSourceDirectory>WebContent</warSourceDirectory>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.1.0.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate</artifactId>
<version>3.5.4-Final</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.1.3.Final</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>1.8.0.10</version>
</dependency>
</dependencies>
</project>
web.xml
<description>Database</description>
<resource-ref>
<description>DB Connection</description>
<res-ref-name>jdbc/Spring_Tutorial</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
我添加了 hsqldb jar 文件,但我真的认为我不需要它
<dependency>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
<version>1.8.0.10</version>
</dependency>
据我了解,我只需要 mysql-connector-java 依赖项
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
我的数据库名称是 Spring_Tutorial,我使用的是 mySQL Workbench。
我是否在这里盲目地遗漏了什么?
【问题讨论】:
【参考方案1】:您正在使用带有 HSQL 驱动程序的 MySQL URL:
driverClassName="org.hsql.jdbcDriver"
url="jdbc:mysql://localhost:3306/Spring_Tutorial" />
您需要改用 MySQL 驱动程序:
driverClassName="com.mysql.jdbc.Driver"
【讨论】:
我知道我盲目地错过了一些东西。 JNDI 站点的剪切和粘贴错误...感谢启动并运行以上是关于无法获得 JDBC 连接;嵌套异常是 java.sql.SQLException:无法加载 JDBC 驱动程序类 'org.hsql.jdbcDriver'的主要内容,如果未能解决你的问题,请参考以下文章
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