<div class="htmledit_views"><p><span></span><em>注解是个好东西，但好东西我们也是看见过，整理过，理解过，用过才知道好。不求我们每个都记住，但求保有印象，在需要的时候能提取出来再查找相关资料，平时工作就不会显得那么被动了。</em></p><p><em><span></span></em></p><p>1.@Configuration注解</p><p>该类等价 与XML中配置beans，相当于Ioc容器，它的某个方法头上如果注册了@Bean，就会作为这个Spring容器中的Bean，与xml中配置的bean意思一样。</p><p>@Configuration注解的类必需使用&lt;context:component-scanbase-package=”XXX”/&gt;扫描.如下：</p><p></p><div class="dp-highlighter bg_html"><div class="bar"><div class="tools"><b>[html]</b> <a href="https://blog.csdn.net/achenyuan/article/details/72786759#" rel="nofollow" class="ViewSource" title="view plain" data-token="02f29dcd988d21fb2418f4fb1282901f">view plain</a><span> <a href="https://blog.csdn.net/achenyuan/article/details/72786759#" rel="nofollow" class="CopyToClipboard" title="copy" data-token="02f29dcd988d21fb2418f4fb1282901f">copy</a><div style="position: absolute; left: 647px; top: 444px; width: 16px; height: 16px; z-index: 99;"><embed id="ZeroClipboardMovie_1" src="https://csdnimg.cn/public/highlighter/ZeroClipboard.swf" loop="false" menu="false" quality="best" bgcolor="#ffffff" width="16" height="16" name="ZeroClipboardMovie_1" align="middle" allowscriptaccess="always" allowfullscreen="false" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" flashvars="id=1&amp;width=16&amp;height=16" wmode="transparent"></div></span><div></div><div></div><span> <a href="https://blog.csdn.net/achenyuan/article/details/72786759#" rel="nofollow" class="PrintSource" title="print" data-token="02f29dcd988d21fb2418f4fb1282901f">print</a></span><a href="https://blog.csdn.net/achenyuan/article/details/72786759#" rel="nofollow" class="About" title="?" data-token="02f29dcd988d21fb2418f4fb1282901f">?</a></div></div><ol start="1" class="dp-xml"><li class="alt"><span><span>@Configuration&nbsp;&nbsp;</span></span></li><li class=""><span>public&nbsp;class&nbsp;MainConfig&nbsp;{&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;</span></li><li class=""><span>//在properties文件里配置&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;@Value(“${wx_appid}”)&nbsp;&nbsp;</span></li><li class=""><span>public&nbsp;String&nbsp;appid;&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;protected&nbsp;MainConfig(){}&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;@Bean&nbsp;&nbsp;</span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;WxMpService&nbsp;wxMpService()&nbsp;{&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WxMpService&nbsp;<span class="attribute">wxMpService</span><span>&nbsp;=&nbsp;</span><span class="attribute-value">new</span><span>&nbsp;WxMpServiceImpl();&nbsp;&nbsp;</span></span></li><li class="alt"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wxMpService.setWxMpConfigStorage(wxMpConfigStorage());&nbsp;&nbsp;</span></li><li class=""><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;wxMpService;&nbsp;&nbsp;</span></li><li class="alt"><span>}&nbsp;&nbsp;</span></li><li class=""><span>}&nbsp;&nbsp;</span></li></ol></div><pre class="prettyprint"><code class="language-html has-numbering">@Configuration