{"id":16958,"date":"2025-03-10T10:38:47","date_gmt":"2025-03-10T02:38:47","guid":{"rendered":"https:\/\/92it.top\/?p=16958"},"modified":"2025-03-10T10:38:47","modified_gmt":"2025-03-10T02:38:47","slug":"spring%e7%9a%84%e6%b3%a8%e5%85%a5%e6%96%b9%e5%bc%8f%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f%e8%af%a5%e5%a6%82%e4%bd%95%e9%80%89%e6%8b%a9%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=16958","title":{"rendered":"Spring\u7684\u6ce8\u5165\u65b9\u5f0f\u6709\u54ea\u4e9b\uff1f\u8be5\u5982\u4f55\u9009\u62e9\uff1f"},"content":{"rendered":"\n

\u4f5c\u4e3a Java\u7a0b\u5e8f\u5458\u90fd\u77e5\u9053\uff0c\u6ca1\u6709\u4f9d\u8d56\u6ce8\u5165\uff0cSpring \u6846\u67b6\u5c31\u662f\u65e0\u6cd5\u5b9e\u73b0\u7684\uff0c\u90a3\u4e48\uff0c\u5728 Spring \u6846\u67b6\u4e2d\uff0c\u5e38\u89c1\u7684\u4f9d\u8d56\u6ce8\u5165\u65b9\u5f0f\u6709\u54ea\u4e9b\u5462\uff1f\u6211\u4eec\u8be5\u5982\u4f55\u9009\u62e9\uff1f\u8fd9\u7bc7\u6587\u7ae0\u6765\u804a\u4e00\u804a\u3002<\/p>\n\n\n\n

\u4ece\u6574\u4f53\u4e0a\u6765\u770b\uff0cSpring \u7684\u4f9d\u8d56\u6ce8\u5165\u6709 4\u79cd\u65b9\u5f0f\uff1a<\/p>\n\n\n\n

    \n
  1. \u6784\u9020\u5668\u6ce8\u5165<\/li>\n\n\n\n
  2. setter \u65b9\u6cd5\u6ce8\u5165<\/li>\n\n\n\n
  3. \u5b57\u6bb5\u6ce8\u5165<\/li>\n<\/ol>\n\n\n\n

    \u4e0b\u9762\uff0c\u6211\u4eec\u5c06\u5206\u522b\u5206\u6790\u5b83\u4eec\u7684\u539f\u7406\uff0c\u4ee5\u53ca\u5b83\u4eec\u7684\u4f18\u7f3a\u70b9\u3002<\/p>\n\n\n\n

    1. \u6784\u9020\u5668\u6ce8\u5165<\/strong><\/p>\n\n\n\n

    \n\n\n\n

    \u6784\u9020\u5668\u6ce8\u5165\uff08Constructor Injection\uff09\u662f\u6307\u901a\u8fc7\u6784\u9020\u51fd\u6570\u4f20\u5165\u4f9d\u8d56\u7684\u5bf9\u8c61\u3002Spring \u5bb9\u5668\u5728\u521b\u5efa bean \u65f6\u4f1a\u8c03\u7528\u5b83\u7684\u6784\u9020\u51fd\u6570\uff0c\u5e76\u5c06\u6240\u9700\u7684\u4f9d\u8d56\u9879\u4f5c\u4e3a\u53c2\u6570\u4f20\u5165\u3002<\/p>\n\n\n\n

    \u5982\u4e0b\u793a\u4f8b\u5c55\u793a\u5982\u4f55\u901a\u8fc7\u6784\u9020\u5668\u6ce8\u5165 bean\u3002<\/p>\n\n\n\n

    @Service\npublic class AService {\n    private final BService bService;\n    @Autowired\n    public AService(BService bService) {\n        this.bService = bService;\n    }\n}\n<\/pre>\n\n\n\n
    \u5982\u679c\u7c7b\u53ea\u6709\u4e00\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u90a3\u4e48 @Autowired<\/code> \u6ce8\u89e3\u53ef\u4ee5\u7701\u7565\uff1b\u5982\u679c\u7c7b\u4e2d\u6709\u591a\u4e2a\u6784\u9020\u65b9\u6cd5\uff0c\u90a3\u4e48\u9700\u8981\u6dfb\u52a0\u4e0a @Autowired<\/code> \u6765\u660e\u786e\u6307\u5b9a\u5230\u5e95\u4f7f\u7528\u54ea\u4e2a\u6784\u9020\u65b9\u6cd5\u3002<\/p>\n\n\n\n
    \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
      \n
    • \u5f3a\u5236\u6027\u4f9d\u8d56\u6027\uff1a\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\uff0c\u6240\u6709\u5fc5\u8981\u7684\u4f9d\u8d56\u9879\u90fd\u5fc5\u987b\u63d0\u4f9b\uff0c\u51cf\u5c11\u4e86\u5728\u8fd0\u884c\u65f6\u51fa\u73b0\u7a7a\u6307\u9488\u7684\u98ce\u9669\u3002<\/li>\n\n\n\n
    • \u4e0d\u53ef\u53d8\u6027\uff1a\u88ab\u6ce8\u5165\u7684\u4f9d\u8d56\u53ef\u4ee5\u58f0\u660e\u4e3a final\uff0c\u4f7f\u5f97\u4e00\u65e6\u521d\u59cb\u5316\u540e\u5bf9\u8c61\u7684\u72b6\u6001\u4e0d\u53ef\u66f4\u6539\uff0c\u4ece\u800c\u589e\u5f3a\u4e86\u5bf9\u8c61\u7684\u5b89\u5168\u6027\u3002<\/li>\n\n\n\n
    • \u4fbf\u4e8e\u5355\u5143\u6d4b\u8bd5\uff1a\u6784\u9020\u5668\u53c2\u6570\u5f88\u5bb9\u6613\u6a21\u62df\uff08mock\uff09\u6216\u66ff\u4ee3\uff0c\u65b9\u4fbf\u6d4b\u8bd5\u3002<\/li>\n<\/ul>\n\n\n\n
      \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
        \n
      • \u590d\u6742\u6027\uff1a\u5982\u679c\u4e00\u4e2a\u7c7b\u6709\u5f88\u591a\u4f9d\u8d56\uff0c\u5219\u6784\u9020\u51fd\u6570\u53ef\u80fd\u53d8\u5f97\u975e\u5e38\u590d\u6742\uff0c\u5bfc\u81f4\u53ef\u8bfb\u6027\u5dee\u3002<\/li>\n\n\n\n
      • \u6f5c\u5728\u7684\u6784\u9020\u51fd\u6570\u8fc7\u8f7d\uff1a\u5f53\u6dfb\u52a0\u65b0\u7684\u4f9d\u8d56\u65f6\uff0c\u53ef\u80fd\u9700\u8981\u91cd\u8f7d\u591a\u4e2a\u6784\u9020\u51fd\u6570\uff0c\u589e\u52a0\u4e86\u7ef4\u62a4\u6210\u672c\u3002<\/li>\n<\/ul>\n\n\n\n
        \u6784\u9020\u5668\u6ce8\u5165\u662f\u5de5\u4f5c\u4e2d\u6bd4\u8f83\u63a8\u8350\u7684\u4e00\u79cd\u65b9\u5f0f\uff0c\u56e0\u4e3a\u5b83\u7f16\u8bd1\u671f\u884c\u4e3a\uff0c\u53ef\u4ee5\u51cf\u5c11\u7a7a\u6307\u9488\u3002\u4f46\u662f\uff0c\u5982\u679c\u4e00\u4e2a\u7c7b\u9700\u8981\u5f88\u591a\u4f9d\u8d56\uff0c\u6784\u9020\u5668\u6ce8\u5165\u4f1a\u5bfc\u81f4\u4ee3\u7801\u6bd4\u8f83\u81c3\u80bf\u3002<\/p>\n\n\n\n
        2. Setter \u6ce8\u5165<\/strong><\/p>\n\n\n\n
        \n\n\n\n
        Setter \u6ce8\u5165\uff08Setter Injection\uff09\u662f\u6307\u901a\u8fc7 setter \u65b9\u6cd5\u6ce8\u5165\u4f9d\u8d56\u7684\u5bf9\u8c61\u3002Spring \u5728\u521b\u5efa bean \u540e\uff0c\u901a\u8fc7\u8c03\u7528 setter \u65b9\u6cd5\u6765\u8bbe\u7f6e\u4f9d\u8d56\u9879\u3002<\/p>\n\n\n\n
        \u5982\u4e0b\u793a\u4f8b\u5c55\u793a\u5982\u4f55\u901a\u8fc7 Setter\u6ce8\u5165 bean\u3002<\/p>\n\n\n\n
        @Service\npublic class BService {\n    AService aService;\n\n    @Autowired\n    public void setaService(AService aService) {\n        this.aService = aService;\n    }\n}<\/pre>\n\n\n\n
        \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
          \n
        • \u7075\u6d3b\u6027\uff1a\u53ef\u4ee5\u9009\u62e9\u6027\u5730\u6ce8\u5165\u4f9d\u8d56\u9879\uff0c\u5141\u8bb8\u5728\u5bf9\u8c61\u521b\u5efa\u540e\u8fdb\u884c\u6ce8\u5165\uff0c\u9002\u5408\u53ef\u9009\u7684\u4f9d\u8d56\u3002<\/li>\n\n\n\n
        • \u6e05\u6670\u7684\u914d\u7f6e\uff1a\u53ef\u4ee5\u901a\u8fc7 setter \u65b9\u6cd5\u660e\u786e\u5730\u914d\u7f6e\u5e76\u67e5\u770b\u4f9d\u8d56\u5173\u7cfb\u3002<\/li>\n<\/ul>\n\n\n\n
          \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
            \n
          • \u975e\u5f3a\u5236\u6027\u4f9d\u8d56\uff1a\u5728\u5bf9\u8c61\u521b\u5efa\u540e\u5982\u679c\u6ca1\u6709\u8bbe\u7f6e\u5fc5\u9700\u7684\u4f9d\u8d56\uff0c\u53ef\u80fd\u5bfc\u81f4\u8fd0\u884c\u65f6\u7684\u7a7a\u6307\u9488\u5f02\u5e38\u3002<\/li>\n\n\n\n
          • \u53ef\u53d8\u6027\uff1a\u4f9d\u8d56\u53ef\u4ee5\u5728\u5bf9\u8c61\u751f\u547d\u5468\u671f\u5185\u88ab\u66f4\u6539\uff0c\u53ef\u80fd\u5bfc\u81f4\u4e0d\u4e00\u81f4\u7684\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n
            3. \u5b57\u6bb5\u6ce8\u5165<\/strong><\/p>\n\n\n\n
            \n\n\n\n
            \u5c5e\u6027\u6ce8\u5165\u662f\u5927\u5bb6\u6700\u4e3a\u5e38\u89c1\u4e5f\u662f\u4f7f\u7528\u6700\u591a\u7684\u4e00\u79cd\u6ce8\u5165\u65b9\u5f0f\u4e86\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n
            \u5b57\u6bb5\u6ce8\u5165\uff08Field Injection\uff09\u662f\u76f4\u63a5\u5c06\u4f9d\u8d56\u6ce8\u5165\u5230\u7c7b\u7684\u5b57\u6bb5\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528\u53cd\u5c04\u548c\u6ce8\u89e3\u3002\u901a\u5e38\u4f1a \u4f7f\u7528 Spring \u63d0\u4f9b\u7684\u6ce8\u89e3\uff08\u5982 @Autowired, @Inject, @Resource\uff09\u3002\u8fd9\u79cd\u65b9\u5f0f\u8f83\u4e3a\u7b80\u6d01\uff0c\u4f46\u662f\u4f1a\u6709 NPE\u7684\u98ce\u9669\u3002<\/p>\n\n\n\n
            \u5982\u4e0b\u793a\u4f8b\u5c55\u793a\u5982\u4f55\u901a\u8fc7\u5b57\u6bb5\u6ce8\u5165 bean\u3002<\/p>\n\n\n\n
            @Service\npublic class BService {\n    @Autowired\n    AService aService;\n    \/\/...\n}<\/pre>\n\n\n\n
            \u4e0d\u8fc7\u4e0d\u77e5\u9053\u5c0f\u4f19\u4f34\u4eec\u6709\u6ca1\u6709\u7559\u610f\u8fc7\uff0c\u5728 IDEA \u91cc\u8fb9\uff0c\u4f7f\u7528\u5c5e\u6027\u6ce8\u5165\uff0c\u4f1a\u6709\u4e00\u4e2a\u8b66\u544a\uff1a<\/p>\n\n\n\n
            \u4e0d\u63a8\u8350\u5c5e\u6027\u6ce8\u5165\uff01<\/strong><\/p>\n\n\n\n
            \u539f\u56e0\u6211\u4eec\u540e\u9762\u8ba8\u8bba\u3002<\/p>\n\n\n\n
            \u4f18\u70b9\uff1a<\/strong><\/p>\n\n\n\n
              \n
            • \u7b80\u6d01\u6027\uff1a\u4ee3\u7801\u91cf\u8f83\u5c11\uff0c\u4f7f\u7528\u53cd\u5c04\u548c\u6ce8\u89e3\u53ef\u81ea\u52a8\u5b8c\u6210\u4f9d\u8d56\u6ce8\u5165\uff0c\u6613\u4e8e\u7406\u89e3\u3002<\/li>\n\n\n\n
            • \u65b9\u4fbf\u5feb\u6377\uff1a\u65e0\u9700\u7f16\u5199\u6784\u9020\u51fd\u6570\u6216 setter \u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n
              \u7f3a\u70b9\uff1a<\/strong><\/p>\n\n\n\n
                \n
              • \u4e0d\u6613\u4e8e\u6d4b\u8bd5\uff1a\u7531\u4e8e\u5b57\u6bb5\u662f\u79c1\u6709\u7684\uff0c\u901a\u5e38\u4e0d\u5bb9\u6613\u66ff\u6362\u4f9d\u8d56\u9879\u8fdb\u884c\u6d4b\u8bd5\u3002<\/li>\n\n\n\n
              • \u4f9d\u8d56\u6027\u4e0d\u660e\u663e\uff1a\u4f9d\u8d56\u5173\u7cfb\u5e76\u4e0d\u660e\u786e\uff0c\u5f71\u54cd\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\u3002<\/li>\n\n\n\n
              • \u4e0d\u652f\u6301\u4e0d\u53ef\u53d8\u6027\uff1a\u4e0d\u80fd\u5c06\u5b57\u6bb5\u58f0\u660e\u4e3a final\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u4e0d\u4e00\u81f4\u7684\u72b6\u6001\u3002<\/li>\n<\/ul>\n\n\n\n
                4.\u5b9e\u4f8b\u6ce8\u5165\u65b9\u5f0f\u5927 PK<\/strong><\/p>\n\n\n\n
                \n\n\n\n
                \u4e0a\u9762\u7ed9\u5927\u5bb6\u5217\u51fa\u6765\u4e86\u4e09\u79cd\u6ce8\u5165\u65b9\u5f0f\uff0c\u90a3\u4e48\u4e09\u79cd\u6ce8\u5165\u65b9\u5f0f\u5404\u81ea\u6709\u4f55\u533a\u522b\u5462\uff1f<\/p>\n\n\n\n
                \u7ed3\u5408 Spring \u5b98\u65b9\u6587\u6863\uff0c\u6211\u4eec\u6765\u5206\u6790\u4e0b\u3002<\/p>\n\n\n\n
                \u7ffb\u51fa\u4e86 12 \u5e74\u524d\u7684 Spring3.0 \u7684\u6587\u6863\uff08https:\/\/docs.spring.io\/spring-framework\/docs\/3.0.x\/reference\/beans.html\uff09\uff0c\u91cc\u8fb9\u6709\u5982\u4e0b\u4e00\u6bb5\u8bdd\uff1a<\/p>\n\n\n\n
                \u6211\u6765\u7b80\u5355\u7ffb\u8bd1\u4e0b\uff08\u610f\u8bd1\uff09\uff1a<\/p>\n\n\n\n
                \u4f7f\u7528\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u8fd8\u662f\u4f7f\u7528 set \u65b9\u6cd5\u6ce8\u5165\uff1f\u7531\u4e8e\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u548c set \u65b9\u6cd5\u6ce8\u5165\u53ef\u4ee5\u6df7\u5408\u4f7f\u7528\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u9700\u8981\u5f3a\u5236\u6ce8\u5165\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u7684\u65b9\u5f0f\uff1b\u5982\u679c\u662f\u53ef\u9009\u6ce8\u5165\uff0c\u5219\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 set \u65b9\u6cd5\u6ce8\u5165\u7684\u65b9\u5f0f\u3002\u5f53\u7136\uff0c\u6211\u4eec\u5728 setter \u4e0a\u4f7f\u7528 @Required \u6ce8\u89e3\u53ef\u4ee5\u8ba9 set \u65b9\u6cd5\u6ce8\u5165\u4e5f\u53d8\u4e3a\u5f3a\u5236\u6027\u6ce8\u5165\u3002Spring \u56e2\u961f\u901a\u5e38\u63d0\u5021 setter \u6ce8\u5165\uff0c\u56e0\u4e3a\u5f53\u5c5e\u6027\u7279\u522b\u591a\u7684\u65f6\u5019\uff0c\u6784\u9020\u65b9\u6cd5\u770b\u8d77\u6765\u4f1a\u7279\u522b\u81c3\u80bf\uff0c\u7279\u522b\u662f\u5f53\u5c5e\u6027\u662f\u53ef\u9009\u7684\u65f6\uff08\u5c5e\u6027\u53ef\u9009\u610f\u5473\u7740\u6ca1\u5fc5\u8981\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\uff09\u3002Setter \u65b9\u6cd5\u6ce8\u5165\u8fd8\u6709\u4e00\u4e2a\u597d\u5904\u5c31\u662f\u53ef\u4ee5\u4f7f\u8be5\u7c7b\u7684\u5c5e\u6027\u53ef\u4ee5\u5728\u4ee5\u540e\u91cd\u65b0\u914d\u7f6e\u6216\u91cd\u65b0\u6ce8\u5165\u3002\u4e00\u4e9b\u7eaf\u7cb9\u4e3b\u4e49\u8005\u559c\u6b22\u57fa\u4e8e\u6784\u9020\u51fd\u6570\u7684\u6ce8\u5165\uff0c\u8fd9\u6837\u610f\u5473\u7740\u6240\u6709\u7684\u5c5e\u6027\u90fd\u88ab\u521d\u59cb\u5316\u4e86\uff0c\u7f3a\u70b9\u5219\u662f\u5bf9\u8c61\u53d8\u5f97\u4e0d\u592a\u9002\u5408\u91cd\u65b0\u914d\u7f6e\u548c\u91cd\u65b0\u6ce8\u5165\u3002\u53e6\u5916\u5728\u4e00\u4e9b\u7279\u6b8a\u7684\u573a\u666f\u4e0b\uff0c\u5982\u4e00\u4e2a\u7b2c\u4e09\u65b9\u7c7b\u8981\u6ce8\u5165\u5230 Spring \u5bb9\u5668\uff0c\u4f46\u662f\u8be5\u7c7b\u6ca1\u6709\u63d0\u4f9b set \u65b9\u6cd5\uff0c\u90a3\u4e48\u6b64\u65f6\u4f60\u5c31\u53ea\u80fd\u4f7f\u7528\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u4e86\u3002<\/pre>\n\n\n\n
                \u82f1\u6587\u6c34\u5e73\u6709\u9650\uff0c\u5927\u6982\u7ffb\u8bd1\u4e86\u4e0b\u3002\u5c0f\u4f19\u4f34\u4eec\u91cd\u70b9\u770b\u52a0\u7c97\u90e8\u5206\uff0c\u4e5f\u5c31\u662f\u8bf4\u5728 Spring3.0 \u65f6\u4ee3\uff0c\u5b98\u65b9\u8fd8\u662f\u63d0\u5021 set \u65b9\u6cd5\u6ce8\u5165\u7684\u3002<\/p>\n\n\n\n
                \u4e0d\u8fc7\u4ece Spring4.x \u5f00\u59cb\uff0c\u5b98\u65b9\u5c31\u4e0d\u63a8\u8350\u8fd9\u79cd\u6ce8\u5165\u65b9\u5f0f\u4e86\uff0c\u8f6c\u800c\u63a8\u8350\u6784\u9020\u5668\u6ce8\u5165\u3002<\/p>\n\n\n\n
                \u6211\u4eec\u6765\u770b\u770b Spring4.x \u7684\u6587\u6863\u600e\u4e48\u8bf4\uff08https:\/\/docs.spring.io\/spring-framework\/docs\/4.0.x\/spring-framework-reference\/htmlsingle\/#beans-setter-injection\uff09\uff1a<\/p>\n\n\n\n
                \u8fd9\u6bb5\u5185\u5bb9\u6211\u5c31\u4e0d\u4e00\u4e00\u7ffb\u8bd1\u4e86\uff0c\u5927\u5bb6\u91cd\u70b9\u770b\u7b2c\u4e8c\u6bb5\u7b2c\u4e00\u53e5\uff1a<\/p>\n\n\n\n
                The Spring team generally advocates constructor injection<\/strong><\/p>\n\n\n\n
                \u8fd9\u53e5\u8bdd\u5c31\u662f\u8bf4 Spring \u56e2\u961f\u5021\u5bfc\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u5b8c\u6210\u6ce8\u5165\u3002\u624d\u4e00\u4e2a\u5927\u7248\u672c\u66f4\u65b0\uff0cSpring \u548b\u5c31\u53d8\u4e86\u5462\uff1f\u522b\u6025\uff0c\u4eba\u5bb6\u4e5f\u7ed9\u51fa\u7528\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u7684\u7406\u7531\uff0c\u7b2c\u4e8c\u6bb5\u7ffb\u8bd1\u4e00\u4e0b\u5927\u6982\u662f\u8fd9\u4e2a\u610f\u601d\uff1a<\/p>\n\n\n\n
                \u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u7684\u65b9\u5f0f\uff0c\u80fd\u591f\u4fdd\u8bc1\u6ce8\u5165\u7684\u7ec4\u4ef6\u4e0d\u53ef\u53d8\uff0c\u5e76\u4e14\u80fd\u591f\u786e\u4fdd\u9700\u8981\u7684\u4f9d\u8d56\u4e0d\u4e3a\u7a7a\u3002\u6b64\u5916\uff0c\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u7684\u4f9d\u8d56\u603b\u662f\u80fd\u591f\u5728\u8fd4\u56de\u5ba2\u6237\u7aef\uff08\u7ec4\u4ef6\uff09\u4ee3\u7801\u7684\u65f6\u5019\u4fdd\u8bc1\u5b8c\u5168\u521d\u59cb\u5316\u7684\u72b6\u6001\u3002<\/p>\n\n\n\n
                \u4e0a\u9762\u8fd9\u6bb5\u8bdd\u4e3b\u8981\u8bf4\u4e86\u4e09\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n
                    \u4f9d\u8d56\u4e0d\u53ef\u53d8\uff1a\u8fd9\u4e2a\u597d\u7406\u89e3\uff0c\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u4f9d\u8d56\uff0c\u5728\u5bf9\u8c61\u521b\u5efa\u7684\u65f6\u5019\u5c31\u8981\u6ce8\u5165\u4f9d\u8d56\uff0c\u4e00\u65e6\u5bf9\u8c61\u521b\u5efa\u6210\u529f\uff0c\u4ee5\u540e\u5c31\u53ea\u80fd\u4f7f\u7528\u6ce8\u5165\u7684\u4f9d\u8d56\u800c\u65e0\u6cd5\u4fee\u6539\u4e86\uff0c\u8fd9\u5c31\u662f\u4f9d\u8d56\u4e0d\u53ef\u53d8\uff08\u901a\u8fc7 set \u65b9\u6cd5\u6ce8\u5165\u5c06\u6765\u8fd8\u80fd\u901a\u8fc7 set \u65b9\u6cd5\u4fee\u6539\uff09\u3002
                    \u4f9d\u8d56\u4e0d\u4e3a\u7a7a\uff1a\u901a\u8fc7\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u7684\u65f6\u5019\uff0c\u4f1a\u81ea\u52a8\u68c0\u67e5\u6ce8\u5165\u7684\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\uff0c\u5982\u679c\u4e3a\u7a7a\uff0c\u5219\u6ce8\u5165\u5931\u8d25\uff1b\u5982\u679c\u4e0d\u4e3a\u7a7a\uff0c\u624d\u4f1a\u6ce8\u5165\u6210\u529f\u3002
                    \u5b8c\u5168\u521d\u59cb\u5316\uff1a\u7531\u4e8e\u83b7\u53d6\u5230\u4e86\u4f9d\u8d56\u5bf9\u8c61\uff08\u8fd9\u4e2a\u4f9d\u8d56\u5bf9\u8c61\u662f\u521d\u59cb\u5316\u4e4b\u540e\u7684\uff09\uff0c\u5e76\u4e14\u8c03\u7528\u4e86\u8981\u521d\u59cb\u5316\u7ec4\u4ef6\u7684\u6784\u9020\u65b9\u6cd5\uff0c\u56e0\u6b64\u6700\u7ec8\u62ff\u5230\u7684\u5c31\u662f\u5b8c\u5168\u521d\u59cb\u5316\u7684\u5bf9\u8c61\u4e86\u3002<\/pre>\n\n\n\n
                \u5728 Spring3.0 \u6587\u6863\u4e2d\uff0c\u5b98\u65b9\u8bf4\u5982\u679c\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u7684\u8bdd\uff0c\u5c5e\u6027\u592a\u591a\u53ef\u80fd\u4f1a\u8ba9\u4ee3\u7801\u53d8\u5f97\u975e\u5e38\u81c3\u80bf\uff0c\u90a3\u4e48\u5728 4.0 \u6587\u6863\u4e2d\uff0c\u5b98\u65b9\u5bf9\u8fd9\u4e2a\u8bf4\u6cd5\u4e5f\u505a\u4e86\u4e00\u4e9b\u8ba2\u6b63<\/strong>\uff1a\u5982\u679c\u7528\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u7684\u65f6\u5019\uff0c\u53c2\u6570\u8fc7\u591a\u4ee5\u81f3\u4e8e\u4ee3\u7801\u8fc7\u4e8e\u81c3\u80bf\uff0c\u90a3\u4e48\u6b64\u65f6\u4f60\u9700\u8981\u8003\u8651\u8fd9\u4e2a\u7c7b\u7684\u8bbe\u8ba1\u662f\u5426\u5408\u7406\uff0c\u8fd9\u4e2a\u7c7b\u662f\u5426\u53c2\u6742\u4e86\u592a\u591a\u7684\u5176\u4ed6\u65e0\u5173\u529f\u80fd\uff0c\u8fd9\u4e2a\u7c7b\u662f\u5426\u505a\u5230\u4e86\u5355\u4e00\u804c\u8d23\u3002<\/p>\n\n\n\n
                \u8fd9\u662f\u6784\u9020\u65b9\u6cd5\u6ce8\u5165\u548c set \u65b9\u6cd5\u6ce8\u5165\u7684\u95ee\u9898\uff0c\u90a3\u4e48\u4e0a\u9762\u6211\u4eec\u8fd8\u63d0\u5230\u4e0d\u63a8\u8350\u5c5e\u6027\u6ce8\u5165\uff0c\u8fd9\u53c8\u662f\u548b\u56de\u4e8b\u5462\uff1f<\/p>\n\n\n\n
                \u5c5e\u6027\u6ce8\u5165\u5176\u5b9e\u6709\u4e00\u4e2a\u663e\u800c\u6613\u89c1\u7684\u7f3a\u70b9\uff0c\u90a3\u5c31\u662f\u5bf9\u4e8e IOC \u5bb9\u5668\u4ee5\u5916\u7684\u73af\u5883\uff0c\u9664\u4e86\u4f7f\u7528\u53cd\u5c04\u6765\u63d0\u4f9b\u5b83\u9700\u8981\u7684\u4f9d\u8d56\u4e4b\u5916\uff0c\u65e0\u6cd5\u590d\u7528\u8be5\u5b9e\u73b0\u7c7b\u3002\u56e0\u4e3a\u8be5\u7c7b\u6ca1\u6709\u63d0\u4f9b\u8be5\u5c5e\u6027\u7684 set \u65b9\u6cd5\u6216\u8005\u76f8\u5e94\u7684\u6784\u9020\u65b9\u6cd5\u6765\u5b8c\u6210\u8be5\u5c5e\u6027\u7684\u521d\u59cb\u5316\u3002\u6362\u8a00\u4e4b\uff0c\u8981\u662f\u4f7f\u7528\u5c5e\u6027\u6ce8\u5165\uff0c\u90a3\u4e48\u4f60\u8fd9\u4e2a\u7c7b\u5c31\u53ea\u80fd\u5728 IOC \u5bb9\u5668\u4e2d\u4f7f\u7528\uff0c\u8981\u662f\u60f3\u81ea\u5df1 new \u4e00\u4e0b\u8fd9\u4e2a\u7c7b\u7684\u5bf9\u8c61\uff0c\u90a3\u4e48\u76f8\u5173\u7684\u4f9d\u8d56\u65e0\u6cd5\u5b8c\u6210\u6ce8\u5165<\/p>\n\n\n\n
                5. \u603b\u7ed3<\/strong><\/p>\n\n\n\n
                \n\n\n\n
                \u672c\u6587\uff0c\u6211\u4eec\u5206\u6790\u4e86 Spring\u7684 3\u79cd\u6ce8\u5165\u65b9\u5f0f\uff0c\u5728\u9009\u62e9\u4f9d\u8d56\u6ce8\u5165\u65b9\u5f0f\u65f6\uff0c\u6211\u4eec\u5e94\u8be5\u6839\u636e\u5177\u4f53\u60c5\u51b5\u548c\u9879\u76ee\u6765\u51b3\u5b9a\u3002\u6839\u636e\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u5efa\u8bae\u5982\u4e0b\uff1a<\/p>\n\n\n\n
                  \n
                • \u6784\u9020\u5668\u6ce8\u5165\u662f\u6700\u63a8\u8350\u7684\u65b9\u5f0f\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u5f3a\u5236\u6027\u4f9d\u8d56\u548c\u4e0d\u53ef\u53d8\u6027\u7684\u573a\u666f\u4e0b\u3002<\/li>\n\n\n\n
                • \u5982\u679c\u65e0\u6cd5\u901a\u8fc7\u6784\u9020\u5668\u6ce8\u5165\uff0c\u518d\u9009\u62e9 setter\u6ce8\u5165\u3002<\/li>\n\n\n\n
                • \u5982\u679c\u4e0a\u8ff0\u4e24\u8005\u65b9\u5f0f\u90fd\u4e0d\u9002\u7528\uff0c\u5b57\u6bb5\u6ce8\u5165\u5219\u662f\u6700\u540e\u7684\u9009\u62e9\uff0c\u867d\u7136\u4f7f\u7528\u7b80\u5355\uff0c\u4f46\u662f\u5bb9\u6613\u4ea7\u751fNPE\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
                  \u4f5c\u4e3a Java\u7a0b\u5e8f\u5458\u90fd\u77e5\u9053\uff0c\u6ca1\u6709\u4f9d\u8d56\u6ce8\u5165\uff0cSpring \u6846\u67b6\u5c31\u662f\u65e0\u6cd5\u5b9e\u73b0\u7684\uff0c\u90a3\u4e48\uff0c\u5728 Spring \u6846\u67b6\u4e2d\uff0c\u5e38 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26,27],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16958"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=16958"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16958\/revisions"}],"predecessor-version":[{"id":16959,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/16958\/revisions\/16959"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=16958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=16958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=16958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}