{"id":12122,"date":"2023-11-28T22:44:12","date_gmt":"2023-11-28T14:44:12","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12122"},"modified":"2023-12-11T15:27:12","modified_gmt":"2023-12-11T07:27:12","slug":"spring-zhong-factorybean-shi-shen-me","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/spring-zhong-factorybean-shi-shen-me\/","title":{"rendered":"Spring \u4e2d FactoryBean \u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

\u5728Spring\u6846\u67b6\u4e2d\uff0cFactoryBean<\/code>\u662f\u4e00\u4e2a\u7279\u6b8a\u7684Bean\uff0c\u5b83\u7528\u4e8e\u521b\u5efa\u5176\u4ed6Bean\u7684\u5b9e\u4f8b\u3002FactoryBean<\/code>\u63a5\u53e3\u5141\u8bb8\u5f00\u53d1\u8005\u81ea\u5b9a\u4e49\u5de5\u5382\u7c7b\uff0c\u5c06\u590d\u6742\u7684\u5b9e\u4f8b\u5316\u903b\u8f91\u5c01\u88c5\u5728\u5de5\u5382\u7c7b\u4e2d\uff0c\u4ece\u800c\u66f4\u7075\u6d3b\u5730\u7ba1\u7406Bean\u7684\u521b\u5efa\u8fc7\u7a0b\u3002<\/p>\n

FactoryBean<\/code>\u63a5\u53e3\u7684\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n

public interface FactoryBean<T> {\n\n    T getObject() throws Exception;\n\n    Class<?> getObjectType();\n\n    boolean isSingleton();\n}\n<\/code><\/pre>\n
\u8fd9\u91cc\u7684T<\/code>\u662f\u8981\u521b\u5efa\u7684Bean\u7684\u7c7b\u578b\u3002<\/p>\n
    \n
  • getObject()<\/code>\u65b9\u6cd5\u7528\u4e8e\u8fd4\u56de\u5de5\u5382\u521b\u5efa\u7684Bean\u5b9e\u4f8b\u3002<\/li>\n
  • getObjectType()<\/code>\u65b9\u6cd5\u7528\u4e8e\u6307\u5b9a\u5de5\u5382\u521b\u5efa\u7684Bean\u7684\u7c7b\u578b\u3002<\/li>\n
  • isSingleton()<\/code>\u65b9\u6cd5\u7528\u4e8e\u6307\u5b9a\u5de5\u5382\u521b\u5efa\u7684Bean\u662f\u5426\u662f\u5355\u4f8b\u3002<\/li>\n<\/ul>\n
    \u901a\u8fc7\u5b9e\u73b0FactoryBean<\/code>\u63a5\u53e3\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5de5\u5382\u7c7b\uff0c\u5c06\u521b\u5efaBean\u7684\u8fc7\u7a0b\u4e0eBean\u7684\u4f7f\u7528\u5206\u79bb\u5f00\u6765\u3002\u8fd9\u79cd\u65b9\u5f0f\u7684\u597d\u5904\u662f\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u6765\u63a7\u5236Bean\u7684\u521b\u5efa\u903b\u8f91\uff0c\u4f8b\u5982\u5728\u521b\u5efaBean\u4e4b\u524d\u8fdb\u884c\u4e00\u4e9b\u521d\u59cb\u5316\u64cd\u4f5c\uff0c\u6216\u8005\u6839\u636e\u4e0d\u540c\u7684\u6761\u4ef6\u8fd4\u56de\u4e0d\u540c\u7684Bean\u5b9e\u4f8b\u3002<\/p>\n
    \u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684FactoryBean<\/code>\uff1a<\/p>\n
    public class MyBeanFactory implements FactoryBean<MyBean> {\n\n    @Override\n    public MyBean getObject() throws Exception {\n        \/\/ \u5728\u8fd9\u91cc\u53ef\u4ee5\u7f16\u5199\u590d\u6742\u7684\u5b9e\u4f8b\u5316\u903b\u8f91\n        MyBean myBean = new MyBean();\n        myBean.setSomeProperty("some value");\n        return myBean;\n    }\n\n    @Override\n    public Class<?> getObjectType() {\n        return MyBean.class;\n    }\n\n    @Override\n    public boolean isSingleton() {\n        return true; \/\/ \u8fd4\u56detrue\u8868\u793a\u662f\u5355\u4f8b\uff0cfalse\u8868\u793a\u975e\u5355\u4f8b\n    }\n}\n<\/code><\/pre>\n
    \u5728Spring\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e<bean><\/code>\u5143\u7d20\u6765\u4f7f\u7528FactoryBean<\/code>\uff1a<\/p>\n
    <bean id="myBean" class="com.example.MyBeanFactory"\/>\n<\/code><\/pre>\n
    \u901a\u8fc7\u8fd9\u6837\u7684\u914d\u7f6e\uff0c\u5f53\u5bb9\u5668\u542f\u52a8\u65f6\uff0cMyBeanFactory<\/code>\u5c06\u4f1a\u88ab\u5b9e\u4f8b\u5316\u5e76\u6210\u4e3a\u4e00\u4e2a\u53ef\u7528\u7684Bean\u3002\u5b9e\u9645\u4e0a\uff0cgetObject()<\/code>\u65b9\u6cd5\u8fd4\u56de\u7684\u662fMyBean<\/code>\u5b9e\u4f8b\uff0c\u800c\u4e0d\u662fMyBeanFactory<\/code>\u672c\u8eab\u3002\u8fd9\u79cd\u65b9\u5f0f\u9690\u85cf\u4e86\u5177\u4f53\u7684\u521b\u5efa\u903b\u8f91\uff0c\u4f7f\u5f97\u5ba2\u6237\u7aef\u4ee3\u7801\u53ef\u4ee5\u65b9\u4fbf\u5730\u83b7\u53d6\u5230MyBean<\/code>\u5b9e\u4f8b\uff0c\u800c\u4e0d\u9700\u8981\u4e86\u89e3\u5176\u521b\u5efa\u7684\u7ec6\u8282\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728Spring\u6846\u67b6\u4e2d\uff0cFactoryBean\u662f\u4e00\u4e2a\u7279\u6b8a\u7684Bean\uff0c\u5b83\u7528\u4e8e\u521b\u5efa\u5176\u4ed6Bean\u7684\u5b9e\u4f8b\u3002Factory […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-12122","post","type-post","status-publish","format-standard","hentry","category-spring"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12122","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=12122"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12122\/revisions"}],"predecessor-version":[{"id":47855,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12122\/revisions\/47855"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12122"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}