{"id":753,"date":"2023-05-28T02:11:04","date_gmt":"2023-05-27T18:11:04","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=753"},"modified":"2023-05-28T02:11:04","modified_gmt":"2023-05-27T18:11:04","slug":"spring-ioc%e7%b3%bb%e5%88%97%e4%b9%8bconditional%e6%b3%a8%e8%a7%a3%e7%9a%84%e4%bd%bf%e7%94%a8%e5%92%8c%e5%8e%9f%e7%90%86%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/spring-boot\/spring-ioc%e7%b3%bb%e5%88%97%e4%b9%8bconditional%e6%b3%a8%e8%a7%a3%e7%9a%84%e4%bd%bf%e7%94%a8%e5%92%8c%e5%8e%9f%e7%90%86%e8%a7%a3%e6%9e%90\/","title":{"rendered":"Spring IOC\u7cfb\u5217\u4e4b@Conditional\u6ce8\u89e3\u7684\u4f7f\u7528\u548c\u539f\u7406\u89e3\u6790"},"content":{"rendered":"
\n
<\/mp-common-profile><\/section>\n
\n

<\/span>\u4ecb\u7ecd<\/span><\/span><\/h2>\n

\u4eca\u5929\u8981\u5206\u4eab\u7684\u662fSpring\u7684\u6ce8\u89e3@Conditional\uff0c@Conditional\u662f\u4e00\u4e2a\u6761\u4ef6\u6ce8\u89e3\uff0c\u5b83\u7684\u4f5c\u7528\u662f\u5224\u65adBean\u662f\u5426\u6ee1\u8db3\u6761\u4ef6\uff0c\u5982\u679c\u6ee1\u8db3\u6761\u4ef6\uff0c\u5219\u5c06Bean\u6ce8\u518c\u8fdbIOC\u4e2d\uff0c\u5982\u679c\u4e0d\u6ee1\u8db3\u6761\u4ef6\uff0c\u5219\u4e0d\u8fdb\u884c\u6ce8\u518c\uff0c\u8fd9\u4e2a\u6ce8\u89e3\u5728SpringBoot\u4e2d\u884d\u751f\u51fa\u5f88\u591a\u6ce8\u89e3\uff0c\u6bd4\u5982@ConditionalOnProperty<\/code>\uff0c@ConditionalOnBean<\/code>\uff0c@ConditionalOnClass<\/code>\u7b49\u7b49\uff0c\u5728SpringBoot\u4e2d\uff0c\u8fd9\u4e9b\u6ce8\u89e3\u7528\u5f97\u5f88\u591a\u3002<\/p>\n

<\/span>\u6587\u4ef6\u7cfb\u7edf\u573a\u666f<\/span><\/span><\/h2>\n

\u4e0b\u9762\u6211\u4eec\u6f14\u793a\u4e00\u4e9b@Conditional\u7684\u4f7f\u7528\uff0c\u5728\u8f6f\u4ef6\u5f00\u53d1\u4e2d\uff0c\u6587\u4ef6\u7cfb\u7edf\u662f\u5fc5\u987b\u7684\uff0c\u4f46\u662f\u7cfb\u7edf\u7684\u7279\u70b9\u4e0d\u4e00\u6837\uff0c\u6709\u4e9b\u7528\u6237\u5e0c\u671b\u5c06\u6587\u4ef6\u4fdd\u5b58\u5728\u81ea\u5df1\u7684\u670d\u52a1\u5668\u4e0a\uff0c\u6709\u4e9b\u7528\u6237\u5219\u6ca1\u8fd9\u79cd\u8981\u6c42\uff0c\u8fd9\u65f6\u5019\uff0c\u6587\u4ef6\u53ef\u4ee5\u4fdd\u5b58\u5728\u4e91\u4e0a\uff0c\u4e5f\u53ef\u4ee5\u4fdd\u5b58\u5728\u81ea\u5efa\u6587\u4ef6\u7cfb\u7edf\u4e0a\uff0c\u90a3\u4e48\u9762\u5bf9\u4e0d\u540c\u7528\u6237\u7684\u9700\u6c42\uff0c\u6211\u4eec\u7684\u8f6f\u4ef6\u4e5f\u8981\u80fd\u591f\u9002\u914d\u4e0d\u540c\u7684\u73af\u5883\uff0c\u53ea\u9700\u8981\u7b80\u5355\u7684\u914d\u7f6e\u5373\u53ef\u3002<\/p>\n

\u5047\u8bbe\u6211\u4eec\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7684\u6587\u4ef6\u5168\u90e8\u6258\u7ba1\u5728\u4e91\u670d\u52a1\u5382\u5546\u7684OSS\u4e0a\uff0c\u4ee3\u7801\u903b\u8f91\u4e5f\u6ca1\u6709\u9884\u7559\u6269\u5c55\uff0c\u90a3\u4e48\u5f53\u7528\u6237\u9700\u8981\u79c1\u6709\u5316\u90e8\u7f72\uff0c\u6211\u4eec\u53ef\u80fd\u5c31\u9700\u8981\u66f4\u6539\u6587\u4ef6\u5b58\u50a8\u8fd9\u8fb9\u7684\u903b\u8f91\uff0c\u8fd9\u6837\u7684\u8bbe\u8ba1\u662f\u4e0d\u5408\u7406\u7684\u3002<\/p>\n

\u6211\u4eec\u60f3\u4e00\u60f3\uff0c\u6587\u4ef6\u5b58\u50a8\u7684\u4ee3\u7801\u903b\u8f91\u662f\u4e0d\u540c\u7684\uff0c\u5404\u4e2a\u6587\u4ef6\u7cfb\u7edf\u7684\u5b9e\u73b0\u65b9\u5f0f\u548c\u4f7f\u7528API\u5404\u4e0d\u76f8\u540c\uff0c\u4f46\u662f\u5b83\u4eec\u6709\u4e00\u4e2a\u5171\u6027\uff0c\u90a3\u5c31\u662f\u80fd\u591f\u4e0a\u4f20\u6587\u4ef6\uff0c\u4e0b\u8f7d\u6587\u4ef6\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u5c31\u5e94\u8be5\u62bd\u8c61\u51fa\u4e00\u4e2a\u516c\u5171\u63a5\u53e3\uff0c\u4e0b\u9762\u6709\u4e0d\u540c\u7684\u5b9e\u73b0\uff0c\u6bd4\u5982Minio\u7684\u6587\u4ef6\u4e0a\u4f20\u4e0b\u8f7d\u7b49\u903b\u8f91\u5c31\u4f7f\u7528Minio API\u53bb\u5b9e\u73b0\uff0cFastDFS\u5c31\u4f7f\u7528FastDFS\uff0cOSS\u5c31\u4f7f\u7528OSS\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u7f16\u5199\u5bf9\u5e94\u7684\u4ee3\u7801\u3002<\/p>\n

<\/span>\u7f16\u7801\u5b9e\u73b0<\/span><\/span><\/h2>\n

\u4ee5\u4e0b\u901a\u8fc7\u7f16\u7801\u5b9e\u73b0\u4e0d\u540c\u6587\u4ef6\u7cfb\u7edf\u7684\u903b\u8f91\u5b9e\u73b0\u9694\u79bb\uff0c\u7edf\u4e00\u63d0\u4f9b\u63a5\u53e3\u7684\u65b9\u6848\uff0c\u4e00\u822c\u6211\u4eec\u90fd\u4f1a\u5c06\u914d\u7f6e\u4fe1\u606f\u5199\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u4f7f\u7528storageType\u4ee3\u8868\u6587\u4ef6\u5b58\u50a8\u7c7b\u578b\u3002<\/p>\n

<\/span>\u6587\u4ef6\u4e0a\u4f20\u63a5\u53e3<\/span><\/h3>\n

\u5728StorageService\u63a5\u53e3\u4e2d\uff0c\u53ea\u7b80\u5355\u5b9a\u4e49\u4e86\u4e24\u4e2a\u65b9\u6cd5init()\u548cput()\uff0cinit()\u5c31\u662f\u505a\u4e00\u4e9b\u521d\u59cb\u5316\u64cd\u4f5c\uff0c\u6bd4\u5982\u53c2\u6570\u914d\u7f6e\uff0c\u8fde\u63a5\u7b49\uff0cput()\u5c31\u662f\u4e0a\u4f20\u6587\u4ef6\u63a5\u53e3\u3002<\/p>\n

<\/span>public<\/span> class<\/span> MinioStorageCondition<\/span> implements<\/span> Condition<\/span> <\/span>{
    @Override<\/span>
    public<\/span> boolean<\/span> matches<\/span>(ConditionContext context, AnnotatedTypeMetadata metadata)<\/span> <\/span>{
        String storageType = context.getEnvironment().getProperty(\"storageType\"<\/span>);
        return<\/span> \"minio\"<\/span>.equals(storageType);
    }
}
<\/code><\/pre>\n
<\/span>\u6e90\u7801\u89e3\u6790<\/span><\/span><\/h2>\n
spring\u5728\u626b\u63cfbean\u7684\u65f6\u5019\uff0c\u4f1a\u5224\u65ad\u5bf9\u5e94\u7684bean\u662f\u5426\u6709@Conditional\u6ce8\u89e3\uff0c\u5982\u679c\u6709\uff0c\u5219\u4f1a\u8fdb\u5165value\u4e2d\u7684\u7c7b\uff0c\u8fdb\u53bb\u5224\u65ad\u662f\u5426\u7b26\u5408\u6761\u4ef6\uff0c\u5982\u679c\u7b26\u5408\uff0c\u5219\u8fd4\u56detrue\uff0c\u5c31\u80fd\u591f\u6ce8\u518c\uff0c\u5b9e\u9645\u4e0a\u5982\u679c\u7b26\u5408\u6761\u4ef6\uff0c\u90a3\u4e48\u5c31\u80fd\u5c06BeanDefinition\u6ce8\u518c\u8fdbBeanFactory\uff0c\u5982\u679c\u4e0d\u7b26\u5408\uff0c\u81ea\u7136\u4e0d\u80fd\u6ce8\u518c\u8fdb\u3002<\/p>\n
\u5982\u4e0b\u662f\u6e90\u7801\u7684\u65f6\u5e8f\u56fe<\/p>\n
\u4ece\u4e0a\u9762\u7684\u65f6\u5e8f\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u6574\u4e2a\u8fc7\u7a0b\u6d89\u53ca\u7684\u7c7b\u8fd8\u662f\u633a\u591a\u7684\uff0c\u4e0d\u8fc7\u8fd9\u8fd8\u4e0d\u662f\u5b8c\u6574\u6d41\u7a0b\uff0c\u53ea\u662f\u4ece\u626b\u63cf\u7c7b\u5f00\u59cb\uff0cSpring\u4f1a\u626b\u63cf\u5de5\u7a0b\u8def\u5f84\u4e0b\u7684\u7c7b\uff0c\u8fd9\u4e2a\u8def\u5f84\u53ef\u4ee5\u901a\u8fc7@ComponentScan\u8fdb\u884c\u6307\u5b9a\uff0c\u5982\u679c\u662fSpringBoot\u9879\u76ee\uff0c\u5219\u5c31\u4e3a\u5f53\u524d\u5de5\u7a0b\uff0c\u7136\u540e\u7b5b\u9009\u51fa\u9700\u8981\u6ce8\u518c\u7684bean\u5e76\u6ce8\u518c\u5230BeanFactory\uff0c\u5bf9\u4e8e\u6807\u6ce8\u6709@Conditional\u6ce8\u89e3\u7684\u7c7b\uff0c\u4f1a\u8fdb\u5165@Conditional\u4e2dvalue\u7684\u7c7b\u4e2d\uff0c\u5c31\u662f\u4e0a\u9762\u7684MinioStorageCondition<\/code>\u6216\u8005FastDFSStorageCondition<\/code>\uff0c\u7136\u540e\u8fdb\u884c\u5339\u914d\uff0c\u4e0d\u6ee1\u8db3\u6761\u4ef6\u7684\u5219\u4e0d\u4f1a\u88ab\u6ce8\u518c\u3002<\/p>\n
@Conditional\u7684\u5177\u4f53\u6d41\u7a0b\u4e5f\u6bd4\u8f83\u7b80\u5355\uff0c\u5c31\u4e0d\u4e00\u4e00\u8d58\u8ff0\uff0c\u53ef\u4ee5\u770b\u7740\u4e0a\u9762\u7684\u65f6\u5e8f\u56fe\u53bb\u770b\u6e90\u7801\u5b9e\u73b0\u3002<\/p>\n
<\/span>\u603b\u7ed3<\/span><\/h3>\n
\u4e0a\u9762\u5bf9@Conditional\u7684\u4f7f\u7528\uff0c\u539f\u7406\u7b49\u8fdb\u884c\u7b80\u5355\u7684\u4ecb\u7ecd\uff0c@Conditional\u6ce8\u89e3\u5728SpringBoot\u4e2d\u7528\u5f97\u8fd8\u662f\u6bd4\u8f83\u591a\u7684\uff0c\u7279\u522b\u662f\u5b83\u884d\u751f\u51fa\u6765\u7684\u4e00\u4e9b\u6ce8\u89e3\uff0c\u8fd9\u4e9b\u6ce8\u89e3\u90fd\u662f\u57fa\u4e8e\u5b83\u6765\u8fdb\u884c\u4e8c\u6b21\u5c01\u88c5\u7684\uff0c\u5728SpringBoot\u4e2d\uff0c\u5bf9\u4e8e\u5f88\u591astarter\uff0c\u91cc\u9762\u51e0\u4e4e\u90fd\u4f1a\u6709@Conditional\u548c@Conditional\u884d\u751f\u6ce8\u89e3\u7684\u4f7f\u7528\uff0c\u6211\u4eec\u540e\u7eed\u4f1a\u6311\u9009\u51fa\u4e00\u4e9b\u6765\u8bf4\u3002<\/p>\n
\n
\u4eca\u5929\u7684\u5206\u4eab\u5c31\u5230\u8fd9\u91cc\uff0c\u611f\u8c22\u4f60\u7684\u89c2\u770b\uff0c\u6211\u4eec\u4e0b\u671f\u89c1\uff01<\/p>\n<\/blockquote>\n<\/section>\n
<\/mp-style-type><\/p>\n
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