java.lang.ClassNotFoundException：com.mysql.jdbc.Driver（maven + jboss） [英] java.lang.ClassNotFoundException: com.mysql.jdbc.Driver (maven + jboss)

问题描述

maven pom.xml

maven 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>Test</groupId>
<artifactId>Test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<name>Test</name>
<url>http://maven.apache.org</url>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
    </plugins>
</build>
<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.18</version>
    </dependency>
</dependencies>

在代码中我试图执行 Class.forName（com.mysql.jdbc.Driver）。

我明白了：

java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

但是我已经检查过我在中有mysql.jar jboss-as-7.0.2.Final\standalone\deployments\Test.war \\ \\ WEBE -\\lib 它有com.mysql.jdbc.Driver类。

But I have checked I have mysql.jar in jboss-as-7.0.2.Final\standalone\deployments\Test.war\WEB-INF\lib and it has com.mysql.jdbc.Driver class.

推荐答案

通常，您不应该在war文件中包含JDBC驱动程序。

As a rule you should not be including your JDBC drivers in your war file.

我建议您将驱动程序标记为已提供，并将其添加到服务器的lib目录中。

I suggest you mark the driver as provided and add it to the lib directory of the server.

PS 。我不确定你为什么要使用

PS. I'm not sure why you would be using

Class.forName("com.mysql.jdbc.Driver")

。为什么不让包含管理您的连接和交易？

in your code. Why not let the contain manage your connections and transactions?

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