java - 设置 Maven 插件以将 QueryDSL 与 MySQL 数据库结合使用

Question

我正在尝试设置我的项目，以便我可以针对 MySQL 数据库使用 querydsl-sql。 我想获取类并使用 Maven 生成类，但在设置插件时遇到问题。

我尝试从可用示例 here 配置 pom.xml

<plugin>
    <groupId>com.mysema.querydsl</groupId>
    <artifactId>querydsl-maven-plugin</artifactId>
    <version>2.1.0</version>
    <executions>
        <execution>
            <goals>
                <goal>export</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <jdbcDriver>com.mysql.jdbc.Driver</jdbcDriver>
        <jdbcUrl>jdbc:mysql:mydb:3306/alltrades</jdbcUrl>
        <jdbcUser>mvaz</jdbcUser>
        <packageName>com.three60t.tools.bonus.persistence</packageName>
        <targetFolder>${project.basedir}/target/generated-sources/java</targetFolder>
    </configuration>
    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
    </dependencies>
</plugin>

pom.xml 中也给出了对 mysql-connector-java 的依赖。 我遇到的问题是它似乎找不到驱动程序:

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building tools-bonus
[INFO]    task-segment: [clean, install]
[INFO] ------------------------------------------------------------------------
[INFO] [clean:clean {execution: default-clean}]
[INFO] [querydsl:export {execution: default}]
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[ERROR] 
java.sql.SQLException: No suitable driver found for jdbc:mysql:mydb:3306/alltrades
        at java.sql.DriverManager.getConnection(DriverManager.java:602)
        at java.sql.DriverManager.getConnection(DriverManager.java:185)
        at com.mysema.query.maven.AbstractMetaDataExportMojo.execute(AbstractMetaDataExportMojo.java:134)
        at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:556)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:535)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
        at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
        at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
        at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] No suitable driver found for jdbc:mysql:mydb:3306/alltrades

[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1 second
[INFO] Finished at: Tue Mar 01 16:34:47 CET 2011
[INFO] Final Memory: 23M/219M
[INFO] ------------------------------------------------------------------------

有人可以帮我解决这个问题吗？ 如何指定驱动程序？

Answer 1

您的依赖项似乎是正确的，但您的 JDBC URL 看起来很奇怪。试试<jdbcUrl>jdbc:mysql://localhost:3306/alltrades</jdbcUrl> 。 MySQL Reference Manual声明如下:

The JDBC URL format for MySQL Connector/J is as follows, with items in square brackets ([, ]) being optional:

jdbc:mysql://[host][,failoverhost...][:port]/[database] » [?propertyName1][=propertyValue1][&propertyName2][=propertyValue2]...

If the host name is not specified, it defaults to 127.0.0.1. If the port is not specified, it defaults to 3306, the default port number for MySQL servers.

您可能还需要指定 jdbcPassword 。对于其他选项，请查看 Querydsl Reference Manual .