{"id":10008168,"date":"2023-08-25T15:00:57","date_gmt":"2023-08-25T07:00:57","guid":{"rendered":"https:\/\/blog.itmax.cn\/?p=10008168"},"modified":"2023-08-25T15:00:57","modified_gmt":"2023-08-25T07:00:57","slug":"%e4%bc%bc%e6%87%82%e9%9d%9e%e6%87%82%e7%9a%84-aspectj","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008168","title":{"rendered":"\u4f3c\u61c2\u975e\u61c2\u7684 AspectJ"},"content":{"rendered":"

\u4eca\u5929\u60f3\u548c\u5c0f\u4f19\u4f34\u4eec\u804a\u4e00\u4e0b\u6211\u4eec\u5728\u4f7f\u7528 Spring AOP \u65f6\uff0c\u4e00\u4e2a\u975e\u5e38\u5e38\u89c1\u7684\u6982\u5ff5 AspectJ\u3002<\/p>\n

1. \u5173\u4e8e\u4ee3\u7406<\/h2>\n

\u5c0f\u4f19\u4f34\u4eec\u77e5\u9053\uff0cJava 23 \u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u6709\u4e00\u79cd\u6a21\u5f0f\u53eb\u505a\u4ee3\u7406\u6a21\u5f0f\uff0c\u8fd9\u79cd\u4ee3\u7406\u6211\u4eec\u53ef\u4ee5\u5c06\u4e4b\u79f0\u4e3a\u9759\u6001\u4ee3\u7406\uff0cSpring AOP \u6211\u4eec\u5e38\u8bf4\u662f\u4e00\u79cd\u52a8\u6001\u4ee3\u7406\uff0c\u90a3\u4e48\u8fd9\u4e24\u79cd\u4ee3\u7406\u7684\u533a\u522b\u5728\u54ea\u91cc\u5462\uff1f<\/p>\n

1.1 \u9759\u6001\u4ee3\u7406<\/h3>\n

\u8fd9\u79cd\u4ee3\u7406\u5728\u6211\u4eec\u65e5\u5e38\u751f\u6d3b\u4e2d\u5176\u5b9e\u975e\u5e38\u5e38\u89c1\uff0c\u4f8b\u5982\u623f\u5c4b\u4e2d\u4ecb\u5c31\u76f8\u5f53\u4e8e\u662f\u4e00\u4e2a\u4ee3\u7406\uff0c\u5f53\u623f\u4e1c\u9700\u8981\u51fa\u79df\u623f\u5b50\u7684\u65f6\u5019\uff0c\u9700\u8981\u53d1\u5e03\u5e7f\u544a\u3001\u5bfb\u627e\u5ba2\u6237\u3001\u6e05\u7406\u623f\u95f4\u3002\u3002\u3002\u7531\u4e8e\u6bd4\u8f83\u9ebb\u70e6\uff0c\u56e0\u6b64\u623f\u4e1c\u53ef\u4ee5\u5c06\u79df\u623f\u5b50\u8fd9\u4ef6\u4e8b\u60c5\u59d4\u6258\u7ed9\u4e2d\u95f4\u4ee3\u7406\u53bb\u505a\u3002\u8fd9\u5c31\u662f\u4e00\u4e2a\u9759\u6001\u4ee3\u7406\u3002<\/p>\n

\u6211\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7801\u6765\u6f14\u793a\u4e00\u4e0b\uff0c\u9996\u5148\u6211\u4eec\u6709\u4e00\u4e2a\u79df\u623f\u7684\u63a5\u53e3\uff0c\u5982\u4e0b\uff1a<\/p>\n

public interface Rent {\n    void rent();\n}<\/code><\/pre>\n
\u623f\u4e1c\u5b9e\u73b0\u4e86\u8be5\u63a5\u53e3\uff0c\u8868\u793a\u60f3\u8981\u51fa\u79df\u623f\u5c4b\uff1a<\/p>\n
public class Landlord implements Rent{\n    @Override\n    public void rent() {\n        System.out.println("\u623f\u5c4b\u51fa\u79df");\n    }\n}<\/code><\/pre>\n
\u4e2d\u4ecb\u4f5c\u4e3a\u4e2d\u95f4\u4ee3\u7406\uff0c\u4e5f\u5b9e\u73b0\u4e86\u8be5\u63a5\u53e3\uff0c\u540c\u65f6\u4ee3\u7406\u4e86\u623f\u4e1c\uff0c\u5982\u4e0b\uff1a<\/p>\n
public class HouseAgent implements Rent {\n    private Landlord landlord;\n\n    public HouseAgent(Landlord landlord) {\n        this.landlord = landlord;\n    }\n\n    public HouseAgent() {\n    }\n\n    @Override\n    public void rent() {\n        publishAd();\n        landlord.rent();\n        agencyFee();\n    }\n\n    public void publishAd() {\n        System.out.println("\u53d1\u5e03\u62db\u79df\u5e7f\u544a");\n    }\n\n    public void agencyFee() {\n        System.out.println("\u6536\u53d6\u4e2d\u4ecb\u8d39");\n    }\n}<\/code><\/pre>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u4e2d\u4ecb\u7684 rent \u65b9\u6cd5\u4e2d\uff0c\u9664\u4e86\u8c03\u7528\u623f\u4e1c\u7684 rent \u65b9\u6cd5\u4e4b\u5916\uff0c\u8fd8\u8c03\u7528\u4e86 publishAd \u548c agencyFee \u4e24\u4e2a\u65b9\u6cd5\u3002<\/p>\n
\u63a5\u4e0b\u6765\u5ba2\u6237\u79df\u623f\uff0c\u53ea\u9700\u8981\u548c\u4ee3\u7406\u6253\u4ea4\u9053\u5c31\u53ef\u4ee5\u4e86\uff0c\u5982\u4e0b\uff1a<\/p>\n
public class Client {\n    public static void main(String[] args) {\n        Landlord landlord = new Landlord();\n        HouseAgent houseAgent = new HouseAgent(landlord);\n        houseAgent.rent();\n    }\n}<\/code><\/pre>\n
\u8fd9\u5c31\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4ee3\u7406\u6a21\u5f0f\u3002\u65e0\u8bba\u5927\u5bb6\u662f\u5426\u6709\u63a5\u89e6\u8fc7 Java 23 \u79cd\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u4e0a\u9762\u8fd9\u6bb5\u4ee3\u7801\u5e94\u8be5\u90fd\u5f88\u597d\u7406\u89e3\u3002<\/p>\n
\u8fd9\u662f\u9759\u6001\u4ee3\u7406\u3002<\/p>\n
1.2 \u52a8\u6001\u4ee3\u7406<\/h3>\n
\u52a8\u6001\u4ee3\u7406\u8bb2\u7a76\u5728\u4e0d\u6539\u53d8\u539f\u7c7b\u539f\u65b9\u6cd5\u7684\u60c5\u51b5\u4e0b\uff0c\u589e\u5f3a\u76ee\u6807\u65b9\u6cd5\u7684\u529f\u80fd\uff0c\u4f8b\u5982\uff0c\u5927\u5bb6\u5e73\u65f6\u4f7f\u7528\u7684 Spring \u4e8b\u52a1\u529f\u80fd\uff0c\u5728\u4e0d\u6539\u53d8\u76ee\u6807\u65b9\u6cd5\u7684\u60c5\u51b5\u4e0b\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7\u52a8\u6001\u4ee3\u7406\u4e3a\u65b9\u6cd5\u6dfb\u52a0\u4e8b\u52a1\u5904\u7406\u80fd\u529b\u3002\u518d\u6bd4\u5982\u677e\u54e5\u5728 TienChin \u9879\u76ee\u4e2d\u6240\u8bb2\u7684\u65e5\u5fd7\u5904\u7406\u3001\u63a5\u53e3\u5e42\u7b49\u6027\u5904\u7406\u3001\u591a\u6570\u636e\u6e90\u5904\u7406\u7b49\uff0c\u90fd\u662f\u52a8\u6001\u4ee3\u7406\u80fd\u529b\u7684\u4f53\u73b0\uff1a<\/p>\n
\"\"<\/p>\n
\u4ece\u5b9e\u73b0\u539f\u7406\u4e0a\uff0c\u6211\u4eec\u53c8\u53ef\u4ee5\u5c06\u52a8\u6001\u4ee3\u7406\u5212\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a<\/p>\n
    \n
  • \u7f16\u8bd1\u65f6\u589e\u5f3a\u3002<\/li>\n
  • \u8fd0\u884c\u65f6\u589e\u5f3a\u3002<\/li>\n<\/ul>\n
    1.2.1 \u7f16\u8bd1\u65f6\u589e\u5f3a<\/h4>\n
    \u7f16\u8bd1\u65f6\u589e\u5f3a\uff0c\u8fd9\u79cd\u6709\u70b9\u7c7b\u4f3c\u4e8e Lombok \u7684\u611f\u89c9\uff0c\u5c31\u662f\u5728\u7f16\u8bd1\u9636\u6bb5\u5c31\u76f4\u63a5\u751f\u6210\u4e86\u4ee3\u7406\u7c7b\uff0c\u5c06\u6765\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u5c31\u76f4\u63a5\u8fd0\u884c\u8fd9\u4e2a\u7f16\u8bd1\u751f\u6210\u7684\u4ee3\u7406\u7c7b\uff0cAspectJ \u5c31\u662f\u8fd9\u6837\u4e00\u79cd\u7f16\u8bd1\u65f6\u589e\u5f3a\u7684\u5de5\u5177\u3002<\/p>\n
    AspectJ \u5168\u79f0\u662f Eclipse AspectJ\uff0c \u5176\u5b98\u7f51\u5730\u5740\u662f\uff1a http:\/\/www.eclipse.org\/aspectj<\/code>\uff0c\u622a\u6b62\u5230\u672c\u6587\u5199\u4f5c\u65f6\uff0c\u76ee\u524d\u6700\u65b0\u7248\u672c\u4e3a\uff1a1.9.7\u3002<\/p>\n
    \u4ece\u5b98\u7f51\u6211\u4eec\u53ef\u4ee5\u770b\u5230 AspectJ \u7684\u5b9a\u4f4d\uff1a<\/p>\n
      \n
    1. \u57fa\u4e8e Java \u8bed\u8a00\u7684\u9762\u5411\u5207\u9762\u7f16\u7a0b\u8bed\u8a00\u3002<\/li>\n
    2. \u517c\u5bb9 Java\u3002<\/li>\n
    3. \u6613\u5b66\u6613\u7528\u3002<\/li>\n<\/ol>\n
      \u4f7f\u7528 AspectJ \u65f6\u9700\u8981\u4f7f\u7528\u4e13\u95e8\u7684\u7f16\u8bd1\u5668 ajc\u3002<\/p>\n
      1.2.2 \u8fd0\u884c\u65f6\u589e\u5f3a<\/h4>\n
      \u8fd0\u884c\u65f6\u589e\u5f3a\u5219\u662f\u6307\u501f\u52a9\u4e8e JDK \u52a8\u6001\u4ee3\u7406\u6216\u8005 CGLIB \u52a8\u6001\u4ee3\u7406\u7b49\uff0c\u5728\u5185\u5b58\u4e2d\u4e34\u65f6\u751f\u6210 AOP \u52a8\u6001\u4ee3\u7406\u7c7b\uff0c\u6211\u4eec\u5728 Spring AOP \u4e2d\u5e38\u8bf4\u7684\u52a8\u6001\u4ee3\u7406\uff0c\u4e00\u822c\u662f\u6307\u8fd9\u79cd\u8fd0\u884c\u65f6\u589e\u5f3a\u3002<\/p>\n
      \u6211\u4eec\u5e73\u65e5\u5f00\u53d1\u5199\u7684 Spring AOP\uff0c\u57fa\u672c\u4e0a\u90fd\u662f\u5c5e\u4e8e\u8fd9\u4e00\u7c7b\u3002<\/p>\n
      2. AspectJ \u548c Spring AOP<\/h2>\n
      \u7ecf\u8fc7\u524d\u9762\u7684\u4ecb\u7ecd\uff0c\u76f8\u4fe1\u5927\u5bb6\u5df2\u7ecf\u660e\u767d\u4e86 AspectJ \u5176\u5b9e\u4e5f\u662f AOP \u7684\u4e00\u79cd\u5b9e\u73b0\uff0c\u53ea\u4e0d\u8fc7\u5b83\u662f\u7f16\u8bd1\u65f6\u589e\u5f3a\u3002<\/p>\n
      \u63a5\u4e0b\u6765\uff0c\u677e\u54e5\u518d\u901a\u8fc7\u4e09\u4e2a\u5177\u4f53\u7684\u6848\u4f8b\uff0c\u6765\u548c\u5c0f\u4f19\u4f34\u4eec\u6f14\u793a\u7f16\u8bd1\u65f6\u589e\u5f3a\u548c\u8fd0\u884c\u65f6\u589e\u5f3a\u3002<\/p>\n
      2.1 AspectJ<\/h3>\n
      \u9996\u5148\uff0c\u5728 IDEA \u4e2d\u60f3\u8981\u8fd0\u884c AspectJ\uff0c\u9700\u8981\u5148\u5b89\u88c5 AspectJ \u63d2\u4ef6\uff0c\u5c31\u662f\u4e0b\u9762\u8fd9\u4e2a\uff1a<\/p>\n
      \"\"<\/p>\n
      \u5b89\u88c5\u597d\u4e4b\u540e\uff0c\u6211\u4eec\u9700\u8981\u5728 IDEA \u4e2d\u914d\u7f6e\u4e00\u4e0b\uff0c\u4f7f\u7528 ajc \u7f16\u8bd1\u5668\u4ee3\u66ff javac\uff08\u8fd9\u4e2a\u662f\u9488\u5bf9\u5f53\u524d\u9879\u76ee\u7684\u8bbe\u7f6e\uff0c\u6240\u4ee5\u53ef\u4ee5\u653e\u5fc3\u4fee\u6539\uff09\uff1a<\/p>\n
      \"\"<\/p>\n
      \u6709\u5982\u4e0b\u51e0\u4e2a\u9700\u8981\u4fee\u6539\u7684\u70b9\uff1a<\/p>\n
        \n
      1. \u9996\u5148\u4fee\u6539\u7f16\u8bd1\u5668\u4e3a ajc\u3002<\/li>\n
      2. \u5c06\u4f7f\u7528\u7684 Java \u7248\u672c\u6539\u4e3a 8\uff0c\u8fd9\u4e2a\u4e00\u5171\u6709\u4e24\u4e2a\u5730\u65b9\u9700\u8981\u4fee\u6539\u3002<\/li>\n
      3. \u8bbe\u7f6e aspectjtools.jar \u7684\u4f4d\u7f6e\uff0c\u8fd9\u4e2a jar \u5305\u9700\u8981\u81ea\u5df1\u63d0\u524d\u51c6\u5907\u597d\uff0c\u53ef\u4ee5\u4ece Maven \u5b98\u7f51\u4e0b\u8f7d\uff0c\u7136\u540e\u5728\u8fd9\u91cc\u914d\u7f6e jar \u7684\u8def\u5f84\uff0c\u914d\u7f6e\u5b8c\u6210\u4e4b\u540e\uff0c\u70b9\u51fb test \u6309\u94ae\u8fdb\u884c\u6d4b\u8bd5\uff0c\u6d4b\u8bd5\u6210\u529f\u5c31\u4f1a\u5f39\u51fa\u6765\u56fe\u4e2d\u7684\u5f39\u6846\u3002<\/li>\n<\/ol>\n
        \u5bf9\u4e8e\u7b2c 3 \u6b65\u6240\u9700\u8981\u7684 jar\uff0c\u4e5f\u53ef\u4ee5\u5728\u9879\u76ee\u7684 Maven \u4e2d\u6dfb\u52a0\u5982\u4e0b\u4f9d\u8d56\uff0c\u81ea\u52a8\u4e0b\u8f7d\uff0c\u4e0b\u8f7d\u5230\u672c\u5730\u4ed3\u5e93\u4e4b\u540e\uff0c\u518d\u5220\u9664\u6389 pom.xml \u4e2d\u7684\u914d\u7f6e\u5373\u53ef\uff1a<\/p>\n
        <dependency>\n    <groupId>org.aspectj<\/groupId>\n    <artifactId>aspectjtools<\/artifactId>\n    <version>1.9.7.M3<\/version>\n<\/dependency><\/code><\/pre>\n
        \u8fd9\u6837\uff0c\u5f00\u53d1\u73af\u5883\u5c31\u51c6\u5907\u597d\u4e86\u3002<\/p>\n
        \u63a5\u4e0b\u6765\uff0c\u5047\u8bbe\u6211\u6709\u4e00\u4e2a\u94f6\u884c\u8f6c\u5e10\u7684\u65b9\u6cd5\uff1a<\/p>\n
        public class MoneyService {\n\n    public void transferMoney() {\n        System.out.println("\u8f6c\u8d26\u64cd\u4f5c");\n    }\n}<\/code><\/pre>\n
        \u6211\u60f3\u7ed9\u8fd9\u4e2a\u65b9\u6cd5\u6dfb\u52a0\u4e8b\u52a1\uff0c\u90a3\u4e48\u6211\u5c31\u65b0\u5efa\u4e00\u4e2a Aspect\uff0c\u5982\u4e0b\uff1a<\/p>\n
        public aspect TxAspect {\n    void around():call(void MoneyService.transferMoney()){\n        System.out.println("\u5f00\u542f\u4e8b\u52a1");\n        try {\n            proceed();\n            System.out.println("\u63d0\u4ea4\u4e8b\u52a1\u4e8b\u52a1");\n        } catch (Exception e) {\n            System.out.println("\u56de\u6eda\u4e8b\u52a1");\n        }\n    }\n}<\/code><\/pre>\n
        \u8fd9\u5c31\u662f AspectJ \u7684\u8bed\u6cd5\uff0c\u8ddf Java \u6709\u70b9\u50cf\uff0c\u4f46\u662f\u4e0d\u592a\u4e00\u6837\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e2a TxAspect \u4e0d\u662f\u4e00\u4e2a Java \u7c7b\uff0c\u5b83\u7684\u540e\u7f00\u662f .aj<\/code>\u3002<\/p>\n
        proceed \u8868\u793a\u7ee7\u7eed\u6267\u884c\u76ee\u6807\u65b9\u6cd5\uff0c\u524d\u540e\u903b\u8f91\u6bd4\u8f83\u7b80\u5355\uff0c\u6211\u5c31\u4e0d\u591a\u8bf4\u4e86\u3002<\/p>\n
        \u6700\u540e\uff0c\u6211\u4eec\u53bb\u8fd0\u884c\u8f6c\u8d26\u670d\u52a1\uff1a<\/p>\n
        public class Demo01 {\n    public static void main(String[] args) {\n        MoneyService moneyService = new MoneyService();\n        moneyService.transferMoney();\n    }\n}<\/code><\/pre>\n
        \u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
        \"\"<\/p>\n
        \u8fd9\u5c31\u662f\u4e00\u4e2a\u9759\u6001\u4ee3\u7406\u3002<\/p>\n
        \u4e3a\u4ec0\u4e48\u8fd9\u4e48\u8bf4\u5462\uff1f\u6211\u4eec\u901a\u8fc7 IDEA \u6765\u67e5\u770b\u4e00\u4e0b TxAspect \u7f16\u8bd1\u4e4b\u540e\u7684\u7ed3\u679c\uff1a<\/p>\n
        @Aspect\npublic class TxAspect {\n    static {\n        try {\n            ajc$postClinit();\n        } catch (Throwable var1) {\n            ajc$initFailureCause = var1;\n        }\n\n    }\n\n    public TxAspect() {\n    }\n\n    @Around(\n        value = "call(void MoneyService.transferMoney())",\n        argNames = "ajc$aroundClosure"\n    )\n    public void ajc$around$org_javaboy_demo_p2_TxAspect$1$3b99afea(AroundClosure ajc$aroundClosure) {\n        System.out.println("\u5f00\u542f\u4e8b\u52a1");\n\n        try {\n            ajc$around$org_javaboy_demo_p2_TxAspect$1$3b99afeaproceed(ajc$aroundClosure);\n            System.out.println("\u63d0\u4ea4\u4e8b\u52a1\u4e8b\u52a1");\n        } catch (Exception var2) {\n            System.out.println("\u56de\u6eda\u4e8b\u52a1");\n        }\n\n    }\n\n    public static TxAspect aspectOf() {\n        if (ajc$perSingletonInstance == null) {\n            throw new NoAspectBoundException("org_javaboy_demo_p2_TxAspect", ajc$initFailureCause);\n        } else {\n            return ajc$perSingletonInstance;\n        }\n    }\n\n    public static boolean hasAspect() {\n        return ajc$perSingletonInstance != null;\n    }\n}<\/code><\/pre>\n
        \u518d\u770b\u4e00\u4e0b\u7f16\u8bd1\u4e4b\u540e\u7684\u542f\u52a8\u7c7b\uff1a<\/p>\n
        public class Demo01 {\n    public Demo01() {\n    }\n\n    public static void main(String[] args) {\n        MoneyService moneyService = new MoneyService();\n        transferMoney_aroundBody1$advice(moneyService, TxAspect.aspectOf(), (AroundClosure)null);\n    }\n}<\/code><\/pre>\n
        \u53ef\u4ee5\u770b\u5230\uff0c\u90fd\u662f\u4fee\u6539\u540e\u7684\u5185\u5bb9\u4e86\u3002<\/p>\n
        \u6240\u4ee5\u8bf4 AspectJ \u7684\u4f5c\u7528\u5c31\u6709\u70b9\u7c7b\u4f3c\u4e8e Lombok\uff0c\u76f4\u63a5\u5728\u7f16\u8bd1\u65f6\u671f\u5c06\u6211\u4eec\u7684\u4ee3\u7801\u6539\u4e86\uff0c\u8fd9\u5c31\u662f\u7f16\u8bd1\u65f6\u589e\u5f3a\u3002<\/p>\n
        2.2 Spring AOP<\/h3>\n
        Spring AOP \u5728\u5f00\u53d1\u7684\u65f6\u5019\uff0c\u5176\u5b9e\u4e5f\u4f7f\u7528\u4e86 AspectJ \u4e2d\u7684\u6ce8\u89e3\uff0c\u50cf\u6211\u4eec\u5e73\u65f6\u4f7f\u7528\u7684 @Aspect\u3001@Around\u3001@Pointcut \u7b49\uff0c\u90fd\u662f AspectJ \u91cc\u8fb9\u63d0\u4f9b\u7684\uff0c\u4f46\u662f Spring AOP \u5e76\u672a\u501f\u9274 AspectJ \u7684\u7f16\u8bd1\u65f6\u589e\u5f3a\uff0cSpring AOP \u6ca1\u6709\u4f7f\u7528 AspectJ \u7684\u7f16\u8bd1\u5668\u548c\u7ec7\u5165\u5668\uff0cSpring AOP \u8fd8\u662f\u4f7f\u7528\u4e86\u8fd0\u884c\u65f6\u589e\u5f3a\u3002<\/p>\n
        \u8fd0\u884c\u65f6\u589e\u5f3a\u53ef\u4ee5\u5229\u7528 JDK \u52a8\u6001\u4ee3\u7406\u6216\u8005 CGLIB \u52a8\u6001\u4ee3\u7406\u6765\u5b9e\u73b0\u3002\u6211\u5206\u522b\u6765\u6f14\u793a\u3002<\/p>\n
        2.2.1 JDK \u52a8\u6001\u4ee3\u7406<\/h4>\n
        JDK \u52a8\u6001\u4ee3\u7406\u6709\u4e00\u4e2a\u8981\u6c42\uff0c\u5c31\u662f\u88ab\u4ee3\u7406\u7684\u5bf9\u8c61\u9700\u8981\u6709\u63a5\u53e3\uff0c\u6ca1\u6709\u63a5\u53e3\u4e0d\u884c\uff0cCGLIB \u52a8\u6001\u4ee3\u7406\u5219\u65e0\u6b64\u8981\u6c42\u3002<\/p>\n
        \u5047\u8bbe\u6211\u73b0\u5728\u6709\u4e00\u4e2a\u8ba1\u7b97\u5668\u63a5\u53e3\uff1a<\/p>\n
        public interface ICalculator {\n    int add(int a, int b);\n}<\/code><\/pre>\n
        \u8fd9\u4e2a\u63a5\u53e3\u6709\u4e00\u4e2a\u5b9e\u73b0\u7c7b\uff1a<\/p>\n
        public class CalculatorImpl implements ICalculator {\n    @Override\n    public int add(int a, int b) {\n        System.out.println(a + "+" + b + "=" + (a + b));\n        return a + b;\n    }\n}<\/code><\/pre>\n
        \u73b0\u5728\uff0c\u6211\u60f3\u901a\u8fc7\u52a8\u6001\u4ee3\u7406\u5b9e\u73b0\u7edf\u8ba1\u8be5\u63a5\u53e3\u7684\u6267\u884c\u65f6\u95f4\u529f\u80fd\uff0cJDK \u52a8\u6001\u4ee3\u7406\u5982\u4e0b\uff1a<\/p>\n
        public class Demo02 {\n    public static void main(String[] args) {\n\n        CalculatorImpl calculator = new CalculatorImpl();\n        ICalculator proxyInstance = (ICalculator) Proxy.newProxyInstance(Demo02.class.getClassLoader(), new Class[]{ICalculator.class}, new InvocationHandler() {\n            @Override\n            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {\n                long startTime = System.currentTimeMillis();\n                Object invoke = method.invoke(calculator, args);\n                long endTime = System.currentTimeMillis();\n                System.out.println(method.getName() + " \u65b9\u6cd5\u6267\u884c\u8017\u65f6 " + (endTime - startTime) + " \u6beb\u79d2");\n                return invoke;\n            }\n        });\n        proxyInstance.add(3, 4);\n    }\n}<\/code><\/pre>\n
        \u4e0d\u9700\u8981\u4efb\u4f55\u989d\u5916\u4f9d\u8d56\uff0c\u90fd\u662f JDK \u81ea\u5e26\u7684\u80fd\u529b\uff1a<\/p>\n
          \n
        1. Proxy.newProxyInstance \u65b9\u6cd5\u8868\u793a\u8981\u751f\u6210\u4e00\u4e2a\u52a8\u6001\u4ee3\u7406\u5bf9\u8c61\u3002<\/li>\n
        2. newProxyInstance \u65b9\u6cd5\u6709\u4e09\u4e2a\u53c2\u6570\uff0c\u7b2c\u4e00\u4e2a\u662f\u4e00\u4e2a\u7c7b\u52a0\u8f7d\u5668\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u88ab\u4ee3\u7406\u7684\u5bf9\u8c61\u6240\u5b9e\u73b0\u7684\u63a5\u53e3\uff0c\u7b2c\u4e09\u4e2a\u5219\u662f\u5177\u4f53\u7684\u4ee3\u7406\u903b\u8f91\u3002<\/li>\n
        3. \u5728 InvocationHandler \u4e2d\uff0c\u6709\u4e00\u4e2a invoke \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u6709\u4e09\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u8868\u793a\u5f53\u524d\u4ee3\u7406\u5bf9\u8c61\uff0c\u88ab\u62e6\u622a\u4e0b\u6765\u7684\u65b9\u6cd5\u4ee5\u53ca\u65b9\u6cd5\u7684\u53c2\u6570\uff0c\u6211\u4eec\u5728\u8be5\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u7edf\u8ba1\u88ab\u62e6\u622a\u65b9\u6cd5\u7684\u6267\u884c\u65f6\u95f4\uff0c\u901a\u8fc7\u65b9\u5f0f\u6267\u884c\u88ab\u62e6\u622a\u4e0b\u6765\u7684\u76ee\u6807\u65b9\u6cd5\u3002<\/li>\n
        4. \u6700\u7ec8\uff0c\u7b2c\u4e00\u6b65\u7684\u65b9\u6cd5\u8fd4\u56de\u4e86\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\uff0c\u6267\u884c\u8be5\u4ee3\u7406\u5bf9\u8c61\uff0c\u5c31\u6709\u4ee3\u7406\u7684\u6548\u679c\u4e86\u3002<\/li>\n<\/ol>\n
          \u4e0a\u9762\u8fd9\u4e2a\u6848\u4f8b\u5c31\u662f\u4e00\u4e2a JDK \u52a8\u6001\u4ee3\u7406\u3002\u8fd9\u662f\u4e00\u79cd\u8fd0\u884c\u65f6\u589e\u5f3a\uff0c\u5728\u7f16\u8bd1\u9636\u6bb5\u5e76\u672a\u4fee\u6539\u6211\u4eec\u7684\u4ee3\u7801\u3002<\/p>\n
          2.2.2 CGLIB \u52a8\u6001\u4ee3\u7406<\/h4>\n
          \u4ece SpringBoot2 \u5f00\u59cb\uff0cAOP \u9ed8\u8ba4\u4f7f\u7528\u7684\u52a8\u6001\u4ee3\u7406\u5c31\u662f CGLIB \u52a8\u6001\u4ee3\u7406\u4e86\uff0c\u76f8\u6bd4\u4e8e JDK \u52a8\u6001\u4ee3\u7406\uff0cCGLIB \u52a8\u6001\u4ee3\u7406\u652f\u6301\u4ee3\u7406\u4e00\u4e2a\u7c7b\u3002<\/p>\n
          \u4f7f\u7528 CGLIB \u52a8\u6001\u4ee3\u7406\uff0c\u9700\u8981\u9996\u5148\u6dfb\u52a0\u4f9d\u8d56\uff0c\u5982\u4e0b\uff1a<\/p>\n
          <dependency>\n    <groupId>cglib<\/groupId>\n    <artifactId>cglib<\/artifactId>\n    <version>3.3.0<\/version>\n<\/dependency><\/code><\/pre>\n
          \u5047\u8bbe\u6211\u6709\u4e00\u4e2a\u8ba1\u7b97\u5668\uff0c\u5982\u4e0b\uff1a<\/p>\n
          public class Calculator {\n    public int add(int a, int b) {\n        System.out.println(a + "+" + b + "=" + (a + b));\n        return a + b;\n    }\n}<\/code><\/pre>\n
          \u5927\u5bb6\u6ce8\u610f\uff0c\u8fd9\u4e2a\u8ba1\u7b97\u5668\u5c31\u662f\u4e00\u4e2a\u5b9e\u73b0\u7c7b\uff0c\u6ca1\u6709\u63a5\u53e3\u3002<\/p>\n
          \u73b0\u5728\uff0c\u6211\u60f3\u7edf\u8ba1\u8fd9\u4e2a\u8ba1\u7b97\u5668\u65b9\u6cd5\u7684\u6267\u884c\u65f6\u95f4\uff0c\u9996\u5148\uff0c\u6211\u6dfb\u52a0\u4e00\u4e2a\u65b9\u6cd5\u6267\u884c\u7684\u62e6\u622a\u5668\uff1a<\/p>\n
          public class CalculatorInterceptor implements MethodInterceptor {\n    @Override\n    public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable {\n        long startTime = System.currentTimeMillis();\n        Object result = methodProxy.invokeSuper(o, objects);\n        long endTime = System.currentTimeMillis();\n        System.out.println(method.getName() + " \u65b9\u6cd5\u6267\u884c\u8017\u65f6 " + (endTime - startTime) + " \u6beb\u79d2");\n        return result;\n    }\n}<\/code><\/pre>\n
          \u5f53\u628a\u4ee3\u7406\u65b9\u6cd5\u62e6\u622a\u4e0b\u6765\u4e4b\u540e\uff0c\u989d\u5916\u8981\u505a\u7684\u4e8b\u60c5\u5c31\u5728 intercept \u65b9\u6cd5\u4e2d\u5b8c\u6210\u3002\u901a\u8fc7\u6267\u884c methodProxy.invokeSuper<\/code> \u53ef\u4ee5\u8c03\u7528\u5230\u4ee3\u7406\u65b9\u6cd5\u3002<\/p>\n
          \u6700\u540e\uff0c\u914d\u7f6e CGLIB\uff0c\u4e3a\u65b9\u6cd5\u914d\u7f6e\u589e\u5f3a\uff1a<\/p>\n
          public class Demo03 {\n    public static void main(String[] args) {\n        Enhancer enhancer = new Enhancer();\n        enhancer.setSuperclass(Calculator.class);\n        enhancer.setCallback(new CalculatorInterceptor());\n        Calculator calculator = (Calculator) enhancer.create();\n        calculator.add(4, 5);\n    }\n}<\/code><\/pre>\n
          \u8fd9\u91cc\u5176\u5b9e\u5c31\u662f\u521b\u5efa\u4e86\u5b57\u8282\u589e\u5f3a\u5668\uff0c\u4e3a\u751f\u6210\u7684\u4ee3\u7406\u5bf9\u8c61\u914d\u7f6e superClass\uff0c\u7136\u540e\u8bbe\u7f6e\u62e6\u622a\u4e0b\u6765\u4e4b\u540e\u7684\u56de\u8c03\u51fd\u6570\u5c31\u884c\u4e86\uff0c\u6700\u540e\u901a\u8fc7 create \u65b9\u6cd5\u83b7\u53d6\u5230\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\u3002<\/p>\n
          \u8fd9\u5c31\u662f CGLIB \u52a8\u6001\u4ee3\u7406\u3002<\/p>\n
          3. \u5c0f\u7ed3<\/h2>\n
          \u7ecf\u8fc7\u4e0a\u9762\u7684\u4ecb\u7ecd\uff0c\u73b0\u5728\u5927\u5bb6\u5e94\u8be5\u641e\u660e\u767d\u4e86\u9759\u6001\u4ee3\u7406\u3001\u7f16\u8bd1\u65f6\u589e\u5f3a\u7684\u52a8\u6001\u4ee3\u7406\u548c\u8fd0\u884c\u65f6\u589e\u5f3a\u7684\u52a8\u6001\u4ee3\u7406\u4e86\u5427\uff5e<\/p>\n
          \u90a3\u4e48\u6211\u4eec\u5728\u9879\u76ee\u4e2d\u5230\u5e95\u8be5\u5982\u4f55\u9009\u62e9\u5462\uff1f<\/p>\n
          \u5148\u6765\u8bf4 AspectJ \u7684\u51e0\u4e2a\u4f18\u52bf\u5427\u3002<\/p>\n
            \n
          1. Spring AOP \u7531\u4e8e\u8981\u751f\u6210\u52a8\u6001\u4ee3\u7406\u7c7b\uff0c\u56e0\u6b64\uff0c\u5bf9\u4e8e\u4e00\u4e9b static \u6216\u8005 final \u4fee\u9970\u7684\u65b9\u6cd5\uff0c\u662f\u65e0\u6cd5\u4ee3\u7406\u7684\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u65b9\u6cd5\u662f\u65e0\u6cd5\u88ab\u91cd\u5199\u7684\uff0cfinal \u4fee\u9970\u7684\u7c7b\u4e5f\u65e0\u6cd5\u88ab\u7ee7\u627f\u3002\u4f46\u662f\uff0cAspectJ \u7531\u4e8e\u4e0d\u9700\u8981\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b\uff0c\u4e00\u5207\u90fd\u662f\u7f16\u8bd1\u65f6\u5b8c\u6210\u7684\uff0c\u56e0\u6b64\uff0c\u8fd9\u4e2a\u95ee\u9898\u5728 AspectJ \u4e2d\u5929\u7136\u7684\u5c31\u88ab\u89e3\u51b3\u4e86\u3002<\/li>\n
          2. Spring AOP \u6709\u4e00\u4e2a\u5c40\u9650\u6027\uff0c\u5c31\u662f\u53ea\u80fd\u7528\u5230\u88ab Spring \u5bb9\u5668\u7ba1\u7406\u7684 Bean \u4e0a\uff0c\u5176\u4ed6\u7684\u7c7b\u5219\u65e0\u6cd5\u4f7f\u7528\uff0cAspectJ \u5219\u65e0\u6b64\u9650\u5236\uff08\u8bdd\u8bf4\u56de\u6765\uff0cJava \u9879\u76ee Spring \u57fa\u672c\u4e0a\u90fd\u662f\u6807\u914d\u4e86\uff0c\u6240\u4ee5\u8fd9\u70b9\u5176\u5b9e\u5230\u4e5f\u4e0d\u91cd\u8981\uff09\u3002<\/li>\n
          3. Spring AOP \u53ea\u80fd\u5728\u8fd0\u884c\u65f6\u589e\u5f3a\uff0c\u800c AspectJ \u5219\u652f\u6301\u7f16\u8bd1\u65f6\u589e\u5f3a\uff0c\u7f16\u8bd1\u540e\u589e\u5f3a\u4ee5\u53ca\u8fd0\u884c\u65f6\u589e\u5f3a\u3002<\/li>\n
          4. Spring AOP \u652f\u6301\u65b9\u6cd5\u7684\u589e\u5f3a\uff0c\u7136\u800c AspectJ \u652f\u6301\u65b9\u6cd5\u3001\u5c5e\u6027\u3001\u6784\u9020\u5668\u3001\u9759\u6001\u5bf9\u8c61\u3001final \u7c7b\/\u65b9\u6cd5\u7b49\u7684\u589e\u5f3a\u3002<\/li>\n
          5. AspectJ \u7531\u4e8e\u662f\u7f16\u8bd1\u65f6\u589e\u5f3a\uff0c\u56e0\u6b64\u8fd0\u884c\u6548\u7387\u4e5f\u8981\u9ad8\u4e8e Spring AOP\u3002<\/li>\n
          6. \u3002\u3002\u3002<\/li>\n<\/ol>\n
            \u867d\u7136 AspectJ \u6709\u8fd9\u4e48\u591a\u4f18\u52bf\uff0c\u4f46\u662f Spring AOP \u5374\u6709\u53e6\u5916\u4e00\u4e2a\u5236\u80dc\u6cd5\u5b9d\uff0c\u90a3\u5c31\u662f\u7b80\u5355\u6613\u7528<\/strong>\uff01<\/p>\n
            \u6240\u4ee5\uff0c\u6211\u4eec\u65e5\u5e38\u5f00\u53d1\u4e2d\uff0c\u8fd8\u662f Spring AOP \u4f7f\u7528\u66f4\u591a\u3002<\/p>\n
            https:\/\/segmentfault.com\/a\/1190000044149317<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
            \u4eca\u5929\u60f3\u548c\u5c0f\u4f19\u4f34\u4eec\u804a\u4e00\u4e0b\u6211\u4eec\u5728\u4f7f\u7528 Spring AOP \u65f6\uff0c\u4e00\u4e2a\u975e\u5e38\u5e38\u89c1\u7684\u6982\u5ff5 AspectJ\u3002 1. \u5173\u4e8e\u4ee3 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10008168","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008168","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008168"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008168\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008168"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008168"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008168"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}