{"id":1593,"date":"2017-12-24T11:16:58","date_gmt":"2017-12-24T03:16:58","guid":{"rendered":"http:\/\/coderbee.net\/?p=1593"},"modified":"2018-01-12T21:10:37","modified_gmt":"2018-01-12T13:10:37","slug":"%e5%be%ae%e7%83%ad%e5%b1%b1%e4%b8%98%ef%bc%8c%e6%8e%a2%e7%b4%a2-ioc%e3%80%81aop-%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86%ef%bc%88%e4%b8%80%ef%bc%89","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/framework\/20171224\/1593","title":{"rendered":"\u5fae\u70ed\u5c71\u4e18\uff0c\u63a2\u7d22 IoC\u3001AOP \u5b9e\u73b0\u539f\u7406\uff08\u4e00\uff09 IoC \u5b9e\u73b0\u539f\u7406"},"content":{"rendered":"<h1>\u4e00. \u7b80\u4ecb\u53ca\u9879\u76ee\u8bbe\u5b9a<\/h1>\n<h3>1.1 \u5fae\u70ed\u5c71\u4e18 \u4ecb\u7ecd<\/h3>\n<p><a href=\"https:\/\/github.com\/wen866595\/warmhill\">warmhill\uff08\u5fae\u70ed\u5c71\u4e18\uff09<\/a>\u662f\u4e00\u4e2a\u53c2\u8003 Spring \u5b9e\u73b0 IoC\u3001AOP \u7279\u6027\u7684\u5c0f\u9879\u76ee\u3002<\/p>\n<p>\u76f8\u6bd4\u4e8e Spring \u5e9e\u6742\u7684\u5206\u7c7b\u3001\u5c42\u5c42\u7ee7\u627f\u3001\u62bd\u8c61\uff0c<a href=\"https:\/\/github.com\/wen866595\/warmhill\">warmhill\uff08\u5fae\u70ed\u5c71\u4e18\uff09<\/a> \u91cc\u90fd\u662f\u7b80\u5355\u76f4\u63a5\u7684\u7c7b\u3001\u65b9\u6cd5\u8c03\u7528\uff0c\u6838\u5fc3\u5728\u4e8e\u7b80\u6d01\u5730\u5c55\u73b0\u5b9e\u73b0\u539f\u7406\u3002<\/p>\n<h3>1.2 \u9879\u76ee\u8bbe\u5b9a\u53ca\u9650\u5236<\/h3>\n<p>\u6709\u5982\u4e0b\u7684\u9650\u5b9a\uff1a<br \/>\n1. \u6240\u6709\u7684 bean \u90fd\u662f\u5355\u4f8b\u3002<br \/>\n2. bean \u53ea\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u6807\u8bc6\u7b26 <code>id<\/code>\uff0c\u6ca1\u6709\u540d\u5b57\u3001\u522b\u540d\u3002<br \/>\n3. \u6240\u6709\u7684 bean \u90fd\u662f\u7acb\u5373\u521d\u59cb\u5316\u7684\uff0c\u4e0d\u652f\u6301\u5ef6\u8fdf\u521d\u59cb\u5316\u3002<br \/>\n4. \u5bf9\u4e8e <code>BeanPostProcessor<\/code> \u7684\u5e94\u7528\u662f\u57fa\u4e8e\u58f0\u660e\u7684\u5148\u540e\u987a\u5e8f\u3002<br \/>\n5. \u5bf9\u4e8e AOP \u7684\u5207\u5165\u70b9\uff0c\u53ea\u652f\u6301\u5bf9\u65b9\u6cd5\u8c03\u7528\u7684\u62e6\u622a\uff0c\u4e0d\u7ec6\u5206 <code>Before\/After\/Around\/Throw<\/code> \u7b49\u3002<br \/>\n6. \u5bf9\u4e8e AOP \u7684\u914d\u7f6e\u4e5f\u662f\u57fa\u4e8e bean \u5b9a\u4e49\u7684\uff0c\u4e0d\u652f\u6301 <code>&lt;aop:config&gt;<\/code> \u6807\u7b7e\u3002<br \/>\n7. \u76ee\u524d\u53ea\u652f\u6301\u4ece XML \u65b9\u5f0f\u914d\u7f6e bean \u3002<br \/>\n8. bean \u7684\u5c5e\u6027\u76ee\u524d\u53ea\u652f\u6301 <code>String<\/code> \u7c7b\u578b\u548c\u5bf9\u5176\u4ed6 bean \u7684\u5f15\u7528\uff0c\u53ea\u652f\u6301 setter \u65b9\u6cd5\u7684\u4f9d\u8d56\u6ce8\u5165\u3002<\/p>\n<h1>\u4e8c. IoC\u3001AOP \u57fa\u672c\u6982\u5ff5\u4ecb\u7ecd<\/h1>\n<ul>\n<li>\n<p>Resource: \u8d44\u6e90\u3002\u53ef\u5b58\u653e\u5728\u4efb\u610f\u4f4d\u7f6e\uff0c\u53ea\u6709\u4e00\u4e2a\u65b9\u6cd5\uff1a <code>InputStream getStream();<\/code> \u3002<\/p>\n<\/li>\n<li>\n<p>BeanDefinition: bean \u7684\u5b9a\u4e49\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p>BeanDefitionLoader: bean \u5b9a\u4e49\u52a0\u8f7d\u7c7b\uff0c\u53ea\u6709\u4e00\u4e2a\u65b9\u6cd5\uff1a <code>List&lt;BeanDefinition&gt; load();<\/code> \u3002<\/p>\n<\/li>\n<li>\n<p>BeanFactory: bean \u5de5\u5382\uff0c\u8d1f\u8d23\u6839\u636e bean \u5b9a\u4e49\u521b\u5efa bean \u7684\u5b9e\u4f8b\u3002<\/p>\n<\/li>\n<\/ul>\n<p><!--more--><\/p>\n<pre><code class=\"java\">\/**\n * \u83b7\u53d6\u6307\u5b9a bean \u3002\n * @param beanId beanId\n * @param &lt;T&gt; \u76ee\u6807 bean \u7c7b\u578b\n * @return bean \u5b9e\u4f8b\n *\/\n&lt;T&gt; T getBean(String beanId);\n\n\/**\n * \u83b7\u53d6\u5b9e\u73b0\u4e86\u6307\u5b9a\u7c7b\u578b\u7684\u6240\u6709 Bean \u5b9e\u4f8b\u3002\n * @param requiredType \u76ee\u6807 bean \u7c7b\u578b\n * @param &lt;T&gt; \u76ee\u6807 bean \u7c7b\u578b\n * @return \u5b9e\u73b0\u4e86\u6307\u5b9a\u7c7b\u578b\u7684 bean \u5b9e\u4f8b\u5217\u8868\n *\/\n&lt;T&gt; List&lt;T&gt; getBeans(Class&lt;T&gt; requiredType);\n<\/code><\/pre>\n<ul>\n<li>BeanPostProcessor: \u5728 bean \u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u5bf9\u5b9e\u4f8b\u8fdb\u884c\u52a0\u5de5\uff0c\u4ee5\u900f\u660e\u5730\u6dfb\u52a0\u989d\u5916\u7684\u7279\u6027\uff0cAOP \u5c31\u662f\u901a\u8fc7\u8fd9\u4e2a\u673a\u5236\u5b9e\u73b0\u7684\uff0c\u4e8b\u52a1\u63a7\u5236\u662f AOP \u7684\u4e00\u4e2a\u5178\u578b\u5e94\u7528\u573a\u666f\u3002<\/li>\n<\/ul>\n<pre><code class=\"java\">Object postProcessBeforInit(Object bean, String beanId);\n\nObject postProcessAfterInit(Object bean, String beanId);\n<\/code><\/pre>\n<ul>\n<li>ApplicationContext: \u5e94\u7528\u4e0a\u4e0b\u6587\uff0c\u7ee7\u627f\u4e86 <code>BeanFactory<\/code> \u3002\u804c\u8d23\uff1a<\/li>\n<\/ul>\n<ol>\n<li>\u6839\u636e\u5e94\u7528\u63d0\u4f9b\u7684\u8d44\u6e90\u4fe1\u606f\u521b\u5efa <code>Resource<\/code>, \u7528 <code>BeanDefitionLoader<\/code> \u52a0\u8f7d bean \u5b9a\u4e49\uff0c\u5e76\u6ce8\u518c\u5230 <code>BeanFactory<\/code> \u7684\u5b9e\u73b0\u7c7b\u3002<\/li>\n<li>\u7ba1\u7406\u5e94\u7528\u7684\u751f\u547d\u5468\u671f\uff0c\u53ef\u4ee5\u91cd\u65b0\u52a0\u8f7d bean \u3002<\/li>\n<\/ol>\n<h1>\u4e09. IoC \u5b9e\u73b0\u8981\u70b9<\/h1>\n<p>IoC \u7684\u6838\u5fc3\u662f\u7531 bean \u5bb9\u5668\u521b\u5efa bean\uff0c\u5e76\u6ce8\u5165 bean \u7684\u4f9d\u8d56\u5bf9\u8c61\u3002* <code>AbstractBeanFactory<\/code> bean \u5de5\u5382\u5b9e\u73b0\u7684\u6838\u5fc3\u3002<\/p>\n<h2>3.1 <code>AbstractBeanFactory<\/code> \u7684\u4e3b\u8981\u5c5e\u6027<\/h2>\n<ul>\n<li><code>List&lt;String&gt; beanIds<\/code> \u5c5e\u6027\u7ef4\u62a4 bean \u7684\u58f0\u660e\u987a\u5e8f\uff1b<\/li>\n<li><code>Map&lt;String, BeanDefinition&gt; definitionMap<\/code> \u63d0\u5347\u6839\u636e beanId \u83b7\u53d6 bean \u5b9e\u4f8b\u7684\u6548\u7387\u3002<\/li>\n<li><code>List&lt;BeanPostProcessor&gt; processors<\/code> \u5bb9\u5668\u91cc\u6240\u6709\u7684 <code>BeanPostProcessor<\/code> \u5b9e\u73b0\u3002<\/li>\n<\/ul>\n<h2>3.2 bean \u5bb9\u5668\u521d\u59cb\u5316\u7684\u6838\u5fc3\u6d41\u7a0b<\/h2>\n<ol>\n<li>\u521b\u5efa\u6240\u6709\u7684 <code>BeanPostProcessor<\/code> \u5b9e\u4f8b\uff0c\u4ee5\u4fbf\u5bf9\u540e\u7eed\u5176\u4ed6 bean \u521b\u5efa\u8fc7\u7a0b\u8fdb\u884c\u4ecb\u5165\u5904\u7406\u3002<\/li>\n<li>\u521b\u5efa\u5176\u4ed6\u7684 bean \u5b9e\u4f8b\uff0c\u6240\u6709 bean \u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u90fd\u4f1a\u5e94\u7528\u4e5f\u6709\u7684 <code>BeanPostProcessor<\/code> \u5b9e\u4f8b\u3002<br \/>\n> 2.1 \u521b\u5efa\u539f\u59cb\u7c7b\u578b\u7684\u5b9e\u4f8b\uff1b<br \/>\n> 2.2 \u6ce8\u5165\u4f9d\u8d56\u7684\u5c5e\u6027\uff1b<br \/>\n> 2.3 \u5bf9\u539f\u59cb\u7c7b\u578b\u7684\u5b9e\u4f8b\u9010\u4e2a\u5e94\u7528 <code>BeanPostProcessor<\/code>\uff0c\u8fd4\u56de\u52a0\u5de5\u540e\u7684\u5bf9\u516c\uff1b<br \/>\n> 2.4 \u628a\u52a0\u5de5\u540e\u7684\u5bf9\u8c61\u6ce8\u518c\u5230\u5bb9\u5668\u91cc\u3002<\/li>\n<\/ol>\n<p>\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"java\">\/\/ \u89e6\u53d1\u6240\u6709 bean \u521b\u5efa\u7684\u65b9\u6cd5\npublic void refresh() {\n    \/\/ \u521b\u5efa\u6240\u6709\u7684 BeanPostProcessor \u5b9e\u4f8b\n    initBeanpostProcess();\n\n    \/\/ \u521b\u5efa\u5176\u4ed6\u7684 bean \u5b9e\u4f8b\n    initRemain();\n}\n\nprivate void initRemain() {\n    beanIds.forEach(beanId -&gt; getBean(beanId));\n}\n\nprivate void initBeanpostProcess() {\n    processors = getBeans(BeanPostProcessor.class);\n}\n\n@Override\npublic &lt;T&gt; T getBean(String beanId) {\n    BeanDefinition bdf = definitionMap.get(beanId);\n    Object bean = bdf.getBean();\n    if (bean == null) {\n        \/\/ 1. \u521b\u5efa\u539f\u59cb\u7c7b\u578b\u7684\u5b9e\u4f8b\n        bean = createBean(bdf);\n\n        \/\/ 2. \u6ce8\u5165\u4f9d\u8d56\u7684\u5c5e\u6027\n        applyProperties(bean, bdf.getPropertyValues());\n\n        \/\/ 3. \u52a0\u5de5\n        bean = processBean(bean, bdf);\n\n        \/\/ 4. \u4f5c\u4e3a\u6700\u7ec8\u7684\u7ed3\u679c bean \n        bdf.setBean(bean);\n    }\n    return (T) bean;\n}\n\nprotected void applyProperties(Object bean, PropertyValues propertyValues) {\n}\n\n\/\/ \u5bf9\u539f\u59cb\u7684 bean \u5b9e\u4f8b\u8fdb\u884c\u52a0\u5de5\uff0c\u8fd4\u56de\u52a0\u5de5\u540e\u7684\u5bf9\u8c61\nprivate Object processBean(Object bean, BeanDefinition bdf) {\n    for (BeanPostProcessor beanPostProcessor : processors) {\n        bean = beanPostProcessor.postProcessBeforInit(bean, bdf.getBeanId());\n    }\n\n    \/\/ TODO \u8c03\u7528 bean \u7684\u521d\u59cb\u5316\u65b9\u6cd5\u3002\n\n    for (BeanPostProcessor beanPostProcessor : processors) {\n        bean = beanPostProcessor.postProcessAfterInit(bean, bdf.getBeanId());\n    }\n\n    return bean;\n}\n\n\/\/ \u521b\u5efa\u539f\u59cb\u7684 bean \u5b9e\u4f8b\nprotected Object createBean(BeanDefinition bdf) {\n    try {\n        Object o = bdf.getType().newInstance();\n        return o;\n    } catch (InstantiationException | IllegalAccessException e) {\n        throw new BeanCreationException(\"create bean of \" + bdf.getType() + \" error .\", e);\n    }\n}\n\n\/**\n * \u83b7\u53d6\u5b9e\u73b0\u4e86\u7ed9\u5b9a\u7c7b\u578b\u7684\u6240\u6709 bean \u5b9e\u4f8b\u3002\n *\n * @param requiredType \u76ee\u6807 bean \u7c7b\u578b\n * @param &lt;T&gt;\n * @return \u6ee1\u8db3\u6761\u4ef6\u7684\u5b9e\u4f8b\u5217\u8868\n *\/\n@Override\npublic &lt;T&gt; List&lt;T&gt; getBeans(Class&lt;T&gt; requiredType) {\n    \/\/ \u6309 bean \u7684\u58f0\u660e\u987a\u5e8f\u83b7\u53d6\u5b9e\u4f8b\n    List&lt;Object&gt; beans = beanIds.stream()\n            .map(beanId -&gt; definitionMap.get(beanId))\n            .filter(bdf -&gt; requiredType.isAssignableFrom(bdf.getType()))\n            .map(bdf -&gt; getBean(bdf.getBeanId()))\n            .collect(Collectors.toList());\n    return (List&lt;T&gt;) beans;\n}\n<\/code><\/pre>\n<h2>3.3 \u4f9d\u8d56\u6ce8\u5165<\/h2>\n<p>\u4f9d\u8d56\u6ce8\u5165\u662f\u5728 <code>AutoCapableBeanFactory<\/code> \u7c7b\u5b8c\u6210\u3002<\/p>\n<pre><code class=\"java\">@Override\nprotected void applyProperties(Object bean, PropertyValues propertyValues) {\n    \/\/ \u5982\u679c bean \u7c7b\u578b\u5b9e\u73b0\u4e86\u5bf9\u5de5\u5382\u7684\u76d1\u542c\uff0c\u5219\u6ce8\u5165\u5de5\u5382\u5b9e\u4f8b\u3002\n    if (BeanFactoryAware.class.isAssignableFrom(bean.getClass())) {\n        ((BeanFactoryAware) bean).setBeanFactory(this);\n    }\n\n    for (PropertyValue propertyValue : propertyValues.getList()) {\n        String name = propertyValue.getName();\n        Object value = propertyValue.getValue();\n        if (value instanceof BeanReference) {\n            value = getBean(((BeanReference) value).getBeanId());\n        }\n\n        String setter = \"set\" + Character.toUpperCase(name.charAt(0)) + name.substring(1);\n        try {\n            Method setMethod = bean.getClass().getDeclaredMethod(setter, value.getClass());\n            setMethod.setAccessible(true);\n            setMethod.invoke(bean, value);\n\n        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {\n            try {\n                Field field = bean.getClass().getDeclaredField(name);\n                field.setAccessible(true);\n                field.set(bean, value);\n            } catch (NoSuchFieldException | IllegalAccessException e1) {\n                throw new BeanCreationException(\"set property \" + name + \" error\");\n            }\n        }\n    }\n}\n<\/code><\/pre>\n<h2>3.4 \u6784\u5efa\u5b8c\u6574\u7684\u4e0a\u4e0b\u6587<\/h2>\n<p>\u5e94\u7528\u4e0a\u4e0b\u6587\u7684\u4e24\u5927\u6838\u5fc3\u804c\u8d23\uff1a<\/p>\n<ul>\n<li>\u4ece\u7ed9\u5b9a\u8d44\u6e90\u52a0\u8f7d bean \u5b9a\u4e49\u3002<\/li>\n<li>\u7528 bean \u5b9a\u4e49\u6784\u5efa bean \u5bb9\u5668\u5de5\u5382\u3002<\/li>\n<\/ul>\n<p>\u89c1 <code>ClasspathApplicationContext<\/code> \u7c7b\uff1a<\/p>\n<pre><code>\/\/ 1. \u521b\u5efa\u4e00\u4e2a \u7c7b\u8def\u5f84\u4e0b\u7684\u8d44\u6e90\nClasspathResources resources = new ClasspathResources(xmlPath);\n\n\/\/ 2. \u521b\u5efa\u4e00\u4e2a bean \u5b9a\u4e49\u52a0\u8f7d\u5668\u5e76\u52a0\u88c5 bean \u5b9a\u4e49\nXmlBeanDefinitionReader beanDefinitionReader = new XmlBeanDefinitionReader(resources);\nList&lt;BeanDefinition&gt; definitionList = beanDefinitionReader.load();\n\n\/\/ 3. \u521b\u5efa bean \u5de5\u5382\u3001\u6ce8\u518c bean \u5b9a\u4e49\u3001\u521d\u59cb\u5316\u6240\u6709\u7684 bean\nAutoCapableBeanFactory beanFactory = new AutoCapableBeanFactory();\ndefinitionList.forEach(beanDefinition -&gt; beanFactory.registerBeanDefinition(beanDefinition));\nbeanFactory.refresh();\n<\/code><\/pre>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00. \u7b80\u4ecb\u53ca\u9879\u76ee\u8bbe\u5b9a 1.1 \u5fae\u70ed\u5c71\u4e18 \u4ecb\u7ecd warmhill\uff08\u5fae\u70ed\u5c71\u4e18\uff09\u662f\u4e00\u4e2a &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/framework\/20171224\/1593\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[255],"tags":[256,293],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1593"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=1593"}],"version-history":[{"count":4,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1593\/revisions"}],"predecessor-version":[{"id":1600,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/1593\/revisions\/1600"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=1593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=1593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=1593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}