{"id":227,"date":"2024-08-19T11:55:48","date_gmt":"2024-08-19T03:55:48","guid":{"rendered":"https:\/\/note.ui11.cc\/?p=227"},"modified":"2024-08-19T12:46:22","modified_gmt":"2024-08-19T04:46:22","slug":"%e5%88%86%e5%b1%82%e8%a7%a3%e8%80%a6","status":"publish","type":"post","link":"https:\/\/note.ui11.cc\/index.php\/2024\/08\/19\/%e5%88%86%e5%b1%82%e8%a7%a3%e8%80%a6\/","title":{"rendered":"\u5206\u5c42\u89e3\u8026"},"content":{"rendered":"\n

\u63a7\u5236\u5c42\uff1aController\uff0c\u63a5\u6536\u524d\u7aef\u53d1\u9001\u7684\u8bf7\u6c42\uff0c\u5bf9\u8bf7\u6c42\u8fdb\u884c\u5904\u7406\uff0c\u5e76\u54cd\u5e94\u6570\u636e<\/p>\n\n\n\n

\u670d\u52a1\u5c42\uff1aService \uff0c\u5904\u7406\u5177\u4f53\u7684\u4e1a\u52a1\u903b\u8f91<\/p>\n\n\n\n

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\"\"<\/div><\/figure>\n\n\n\n

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@Autowired:\u4f9d\u8d56\u6ce8\u5165\uff0c\u751f\u6210Bean\u5bf9\u8c61<\/p>\n\n\n\n

@Component:\u60f3\u5c06\u5b9e\u73b0\u7c7b\u4ea4\u7ed9IOC\u5bb9\u5668\u7ba1\u7406\uff0c\u5c31\u5fc5\u987b\u5728\u5b9e\u73b0\u7c7b\u4e5f\u5c31\u662fBean\u5bf9\u8c61\u7684\u7c7b\u524d\u5e74\u52a0@Component\u6ce8\u89e3\uff0c\u8fd9\u4e2a\u7c7b\u53ef\u4ee5\u662f\u4efb\u4f55\u5b9e\u73b0\u7c7b\uff0c\u4e5f\u5c31\u662f\u5728\u63a7\u5236\u5c42\u60f3\u7528\u67d0\u4e2a\u7c7b\u65f6\uff0c\u4e0d\u7528new\u5bf9\u8c61\uff0c\u5b9e\u73b0\u89e3\u8026\uff0c\u901a\u8fc7IOC\u4f9d\u8d56\u6ce8\u5165\u7684\u65b9\u5f0f\u6765\u83b7\u5f97\u8fd9\u4e2a\u7c7b\u7684bean\u5bf9\u8c61\uff0c\u88ab\u4ea4\u7ed9IOC\u5bb9\u5668\u7ba1\u7406\u7684\u7c7b\u524d\u9762\u5fc5\u987b\u52a0\u6ce8\u89e3@Component<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u5728\u63a7\u5236\u5c42\u524d\u9762\u52a0\u6ce8\u89e3\uff1a@RestController<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n

DI\u7ec6\u8282\u8bb2\u89e3\uff1a<\/p>\n\n\n\n

\u5982\u679c\u4e00\u4e2a\u4f9d\u8d56\u6ce8\u5165@Autowired\u6709\u4e24\u4e2abean\u5bf9\u8c61\u8be5\u600e\u4e48\u5904\u7406\uff1f<\/p>\n\n\n\n

1\uff1a\u9996\u5148\u4f1a\u62a5\u9519\uff0c\u56e0\u4e3a\u5e76\u4e0d\u77e5\u9053\u4f60\u8981\u88c5\u914d\u54ea\u4e2abean\u5bf9\u8c61\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n

ServiceB:<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

ServiceA:<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

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\"\"<\/div><\/figure>\n\n\n\n

\u62a5\u9519\u4fe1\u606f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

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\"\"<\/div><\/figure>\n\n\n\n

\u89e3\u51b3\u65b9\u6848\u4e00\uff1a<\/p>\n\n\n\n

@Primary\u6ce8\u89e3\uff1a<\/p>\n\n\n\n

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\u5982\u56fe\uff1a<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u89e3\u51b3\u65b9\u6848\u4e8c\uff1a<\/p>\n\n\n\n

\u4f7f\u7528@Qualifier\u6ce8\u89e3\uff1a<\/p>\n\n\n\n

\u5728\u63a7\u5236\u5c42\u6ce8\u89e3@Autowired\u52a0\u6ce8\u89e3@Qualifier,\u5982\u56fe\uff1a<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

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\u7b2c\u4e09\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528@Resource\u6ce8\u89e3<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u5c0f\u7ed3\uff1a<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

\u9762\u8bd5\u9898\uff1a<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

@Autowired\u662f\u6309\u7c7b\u578b\u8fdb\u884c\u6ce8\u5165\uff1a
@Autowired<\/code> \u662fSpring\u6846\u67b6\u4e2d\u7684\u4e00\u4e2a\u6ce8\u89e3\uff0c\u7528\u4e8e\u81ea\u52a8\u6ce8\u5165\u4f9d\u8d56\u3002\u5f53\u60a8\u5728\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u3001\u6784\u9020\u51fd\u6570\u6216\u65b9\u6cd5\u4e0a\u4f7f\u7528 @Autowired<\/code> \u6ce8\u89e3\u65f6\uff0cSpring\u5bb9\u5668\u4f1a\u81ea\u52a8\u67e5\u627e\u5339\u914d\u7684Bean\uff0c\u5e76\u5c06\u5176\u6ce8\u5165\u5230\u8be5\u6210\u5458\u53d8\u91cf\u3001\u6784\u9020\u51fd\u6570\u6216\u65b9\u6cd5\u4e2d\u3002<\/p>\n\n\n\n

\u6309\u7c7b\u578b\u6ce8\u5165<\/h3>\n\n\n\n

\u5f53\u60a8\u8bf4 @Autowired<\/code> \u662f\u6309\u7c7b\u578b\u8fdb\u884c\u6ce8\u5165\u65f6\uff0c\u8fd9\u610f\u5473\u7740Spring\u5bb9\u5668\u4f1a\u6839\u636e\u6210\u5458\u53d8\u91cf\u6216\u65b9\u6cd5\u53c2\u6570\u7684\u7c7b\u578b\u6765\u67e5\u627e\u5339\u914d\u7684Bean\u3002\u5177\u4f53\u6765\u8bf4\uff0cSpring\u4f1a\u67e5\u627e\u4e0e\u8be5\u7c7b\u578b\u5339\u914d\u7684Bean\uff0c\u5e76\u5c06\u5176\u6ce8\u5165\u5230\u76f8\u5e94\u7684\u5b57\u6bb5\u6216\u53c2\u6570\u4e2d\u3002\u5982\u679c\u5b58\u5728\u591a\u4e2a\u76f8\u540c\u7c7b\u578b\u7684Bean\uff0cSpring\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u9664\u975e\u60a8\u4f7f\u7528 @Qualifier<\/code> \u6ce8\u89e3\u6765\u6307\u5b9a\u5177\u4f53\u7684Bean\u540d\u79f0\u3002<\/p>\n\n\n\n

\u4f8b\u5b50<\/h3>\n\n\n\n

\u5047\u8bbe\u60a8\u6709\u4e00\u4e2a\u63a5\u53e3\u00a0MyService<\/code>\u00a0\u548c\u4e24\u4e2a\u5b9e\u73b0\u7c7b\u00a0MyServiceImpl1<\/code>\u00a0\u548c\u00a0MyServiceImpl2<\/code>\uff1a
<\/p>\n\n\n\n

public interface MyService {\n    \/\/ ...\n}\n\n@Service\npublic class MyServiceImpl1 implements MyService {\n    \/\/ ...\n}\n\n@Service\npublic class MyServiceImpl2 implements MyService {\n    \/\/ ...\n}<\/code><\/pre>\n\n\n\n
}\n<\/code><\/pre>\n\n\n\n
\u5982\u679c\u60a8\u5728\u67d0\u4e2a\u7c7b\u4e2d\u4f7f\u7528 @Autowired<\/code> \u6ce8\u89e3\u6765\u6ce8\u5165 MyService<\/code> \u7c7b\u578b\u7684Bean<\/p>\n\n\n\n
public class MyController {\n    @Autowired\n    private MyService myService;\n    \n    \/\/ ...\n}<\/code><\/pre>\n\n\n\n
Spring\u5bb9\u5668\u4f1a\u67e5\u627e\u7c7b\u578b\u4e3a MyService<\/code> \u7684Bean\uff0c\u5e76\u5c06\u5176\u6ce8\u5165\u5230 myService<\/code> \u5b57\u6bb5\u4e2d\u3002\u5982\u679c\u5bb9\u5668\u4e2d\u53ea\u6709\u4e00\u4e2a MyService<\/code> \u7c7b\u578b\u7684Bean\uff0cSpring\u4f1a\u81ea\u52a8\u6ce8\u5165\u5b83\u3002\u5982\u679c\u6709\u591a\u4e2a\uff0cSpring\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u56e0\u4e3a\u65e0\u6cd5\u786e\u5b9a\u5e94\u8be5\u6ce8\u5165\u54ea\u4e00\u4e2a\u3002<\/p>\n\n\n\n
\u89e3\u51b3\u591aBean\u95ee\u9898<\/h3>\n\n\n\n
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public class MyController {\n    @Autowired\n    @Qualifier(\"myServiceImpl1\")\n    private MyService myService;\n    \n    \/\/ ...\n}<\/code><\/pre>\n\n\n\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u5373\u4f7f\u5bb9\u5668\u4e2d\u6709\u591a\u4e2a MyService<\/code> \u7c7b\u578b\u7684Bean\uff0c@Qualifier(\"myServiceImpl1\")<\/code> \u4f1a\u544a\u8bc9Spring\u6ce8\u5165 myServiceImpl1<\/code> \u8fd9\u4e2aBean\u3002<\/p>\n\n\n\n
\u603b\u7ed3<\/h3>\n\n\n\n
@Autowired<\/code> \u6ce8\u89e3\u5141\u8bb8Spring\u6846\u67b6\u81ea\u52a8\u6ce8\u5165\u4f9d\u8d56\uff0c\u5b83\u9ed8\u8ba4\u6309\u7c7b\u578b\u67e5\u627e\u5339\u914d\u7684Bean\u3002\u5982\u679c\u5b58\u5728\u591a\u4e2a\u76f8\u540c\u7c7b\u578b\u7684Bean\uff0c\u9700\u8981\u4f7f\u7528 @Qualifier<\/code> \u6ce8\u89e3\u6765\u6307\u5b9a\u5177\u4f53\u7684Bean\u540d\u79f0\uff0c\u4ee5\u907f\u514d\u6ce8\u5165\u9519\u8bef\u3002\u8fd9\u79cd\u65b9\u5f0f\u7b80\u5316\u4e86\u4f9d\u8d56\u6ce8\u5165\u7684\u8fc7\u7a0b\uff0c\u4f7f\u5f97\u5f00\u53d1\u8005\u4e0d\u9700\u8981\u624b\u52a8\u7f16\u5199\u4ee3\u7801\u6765\u67e5\u627e\u548c\u6ce8\u5165\u4f9d\u8d56\u3002<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n\n\n\n
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<\/p>\n","protected":false},"excerpt":{"rendered":"
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