{"id":203504,"date":"2025-05-22T11:45:41","date_gmt":"2025-05-22T03:45:41","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203504\/"},"modified":"2025-05-22T11:45:41","modified_gmt":"2025-05-22T03:45:41","slug":"spring-ioc-%e4%b8%ad%e6%b3%a8%e5%85%a5%e7%9b%b8%e5%90%8c%e5%90%8d%e7%a7%b0%e7%9a%84-bean-%e4%bc%9a%e5%af%bc%e8%87%b4%e4%bb%80%e4%b9%88%e9%94%99%e8%af%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203504\/","title":{"rendered":"Spring IOC \u4e2d\u6ce8\u5165\u76f8\u540c\u540d\u79f0\u7684 Bean \u4f1a\u5bfc\u81f4\u4ec0\u4e48\u9519\u8bef\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Spring IOC \u4e2d\u6ce8\u5165\u76f8\u540c\u540d\u79f0\u7684 Bean \u4f1a\u5bfc\u81f4\u4ec0\u4e48\u9519\u8bef\uff1f<\/h1>\n<p>IT\u884c\u4e1a\u76f8\u5bf9\u4e8e\u4e00\u822c\u4f20\u7edf\u884c\u4e1a\uff0c\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u66f4\u5feb\uff0c\u4e00\u65e6\u505c\u6b62\u4e86\u5b66\u4e60\uff0c\u5f88\u5feb\u5c31\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8e0f\u8e0f\u5b9e\u5b9e\u7684\u4e0d\u65ad\u5b66\u4e60\uff0c\u7cbe\u8fdb\u81ea\u5df1\u7684\u6280\u672f\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\u3002\u4eca\u5929\u7ed9\u5927\u5bb6\u6574\u7406\u4e86\u300aSpring IOC \u4e2d\u6ce8\u5165\u76f8\u540c\u540d\u79f0\u7684 Bean \u4f1a\u5bfc\u81f4\u4ec0\u4e48\u9519\u8bef\uff1f\u300b\uff0c\u804a\u804a\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241110\/173121015067302ba6225ad.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>amq \u6d88\u606f\u4e2d\u95f4\u4ef6\u4e2d\u4f7f\u7528 spring ioc \u65f6\u7684\u9519\u8bef<\/strong><\/p>\n<p><strong>\u95ee\u9898\uff1a<\/strong><\/p>\n<p>\u5728\u4f7f\u7528 amq \u6d88\u606f\u4e2d\u95f4\u4ef6\u7684\u9879\u76ee\u4e2d\uff0c\u4e00\u4f4d\u5f00\u53d1\u8005\u8bd5\u56fe\u5728 spring ioc \u5bb9\u5668\u4e2d\u6ce8\u5165\u4e24\u4e2a\u5177\u6709\u76f8\u540c\u540d\u79f0\u7684 bean\uff0c\u4ece\u800c\u5bfc\u81f4\u4e86\u9519\u8bef\u3002\u9519\u8bef\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n<pre>org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [interface org.springframework.data.jpa.repository.JpaRepository] is defined: expected single matching bean but found 2:<\/pre>\n<p><strong>\u5206\u6790\uff1a<\/strong><\/p>\n<p>\u8be5\u9519\u8bef\u8868\u660e spring \u65e0\u6cd5\u627e\u5230\u5177\u6709\u6307\u5b9a\u540d\u79f0\u548c\u7c7b\u578b\u7684\u552f\u4e00 bean\u3002\u5728 spring ioc \u5bb9\u5668\u4e2d\uff0cbean \u7684\u540d\u79f0\u5fc5\u987b\u662f\u552f\u4e00\u7684\u3002\u6b64\u9519\u8bef\u901a\u5e38\u53d1\u751f\u5728\u4ee5\u4e0b\u60c5\u51b5\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5728\u914d\u7f6e\u4e2d\u4e0d\u5c0f\u5fc3\u4f7f\u7528\u4e86\u76f8\u540c\u7684 bean \u540d\u79f0\u3002<\/li>\n<li>\u5728\u4ee3\u7801\u4e2d\u624b\u52a8\u521b\u5efa\u4e86 bean\uff0c\u5e76\u4e14\u4f7f\u7528\u4e86\u76f8\u540c\u7684\u540d\u79f0\u3002<\/li>\n<\/ul>\n<p><strong>\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<p>\u8981\u89e3\u51b3\u6b64\u9519\u8bef\uff0c\u9700\u8981\u786e\u4fdd spring \u914d\u7f6e\u4e2d\u6216\u4ee3\u7801\u4e2d\u6ca1\u6709\u4f7f\u7528\u76f8\u540c\u7684 bean \u540d\u79f0\u3002\u53ef\u4ee5\u5c1d\u8bd5\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u68c0\u67e5 spring \u914d\u7f6e\u6587\u4ef6\uff0c\u786e\u4fdd\u6ca1\u6709\u5b9a\u4e49\u591a\u4e2a\u5177\u6709\u76f8\u540c\u540d\u79f0\u7684 bean\u3002<\/li>\n<li>\u68c0\u67e5\u4ee3\u7801\uff0c\u786e\u4fdd\u6ca1\u6709\u624b\u52a8\u521b\u5efa\u5177\u6709\u76f8\u540c\u540d\u79f0\u7684 bean\u3002<\/li>\n<li>\u4fee\u6539\u5176\u4e2d\u4e00\u4e2a bean \u7684\u540d\u79f0\uff0c\u4f7f\u5176\u4e0e\u53e6\u4e00\u4e2a bean \u533a\u5206\u5f00\u3002<\/li>\n<\/ul>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aSpring IOC \u4e2d\u6ce8\u5165\u76f8\u540c\u540d\u79f0\u7684 Bean \u4f1a\u5bfc\u81f4\u4ec0\u4e48\u9519\u8bef\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spring IOC 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