Java之JavaMail 版本（class冲突问题）

最新推荐文章于 2024-09-13 16:05:45 发布

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#javamail #maven #冲突 #conflict

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当使用过时的JavaMail库时，可能会与JavaEE中的库发生冲突。推荐使用Maven仓库中的com.sun.mail:javax.mail版本，以避免冲突。javax.mail-api提供了API定义，适合编译，而com.sun.mail:javax.mail包含了实现，包括SMTP、IMAP和POP3协议提供者。在编译和部署时，应选择合适的方式使用这两个依赖。

Maven 上有多个 JavaMail 的库。到底用哪个呢？

[b]一、问题：[/b]
如果下载过时的库，会有与 javaee 中的库冲突的问题。

[b]二、结论：[/b]
使用这个： https://mvnrepository.com/artifact/com.sun.mail/javax.mail


<!-- https://mvnrepository.com/artifact/com.sun.mail/javax.mail -->
<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.5.6</version>
</dependency>

[b]三、说明：[/b]

[b]JavaMail API from Maven[/b]

[quote]
I am trying to upgrade to latest Java Mail utility.

From

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.4.7</version>
</dependency>

to (my Intention)

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.5.1</version>
</dependency>

But I don't find 1.5.1 for mail artifact,

but I can see

<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.5.1</version>
</dependency>

My Question is why group id changed and if I change the group id for 1.5.1 do I need to change all my mail implementation that is already present (package name change and any other stuff) and what is the difference between com.sun.mail vs javax.mail?

[/quote]

[quote]

The Maven coordinates changed some time ago to be compatible with the scheme described [url=https://glassfish.java.net/wiki-archive/Maven%20Versioning%20Rules.html]here[/url].
The new coordinates are [url=https://java.net/projects/javamail/pages/Home]here[/url].

[b]In short:[/b]

- The groupId [i][color=blue]javax.mail[/color][/i] is no longer used for the implementation.

- There is a new artifact at [i][color=blue]javax.mail:javax.mail-api[/color][/i].
It provides the [i][color=green]javax.mail-api.jar[/color][/i] file. This contains the JavaMail API definitions only, suitable for compiling against.

- [i][color=blue]com.sun.mail:javax.mail[/color][/i] contains the [i][color=green]javax.mail.jar[/color][/i] file, the JavaMail reference implementation jar file,
including the SMTP, IMAP, and POP3 protocol providers.

[b]So, you should:[/b]
- either use [i][color=blue]com.sun.mail:javax.mail[/color][/i] for compilation and packaging/deploy;
- or use [i][color=blue]javax.mail:javax.mail-api[/color][/i] for compilation and
then deploy the [i][color=blue]com.sun.mail:javax.mail[/color][/i] jar where appropriate (e.g., your Tomcat lib).

[/quote]

引用：

http://stackoverflow.com/a/22021656/2893073

https://java.net/projects/javamail/pages/Home

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原文出处：http://lixh1986.iteye.com/blog/2323537

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