{"id":10006195,"date":"2022-08-12T17:43:28","date_gmt":"2022-08-12T09:43:28","guid":{"rendered":"https:\/\/ityet.com\/?p=10006195"},"modified":"2022-08-12T17:43:28","modified_gmt":"2022-08-12T09:43:28","slug":"%e7%94%a8%e4%ba%86%e9%82%a3%e4%b9%88%e4%b9%85%e7%9a%84lombok%ef%bc%8c%e4%bd%a0%e7%9f%a5%e9%81%93%e5%ae%83%e7%9a%84%e5%8e%9f%e7%90%86%e4%b9%88%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006195","title":{"rendered":"\u7528\u4e86\u90a3\u4e48\u4e45\u7684Lombok\uff0c\u4f60\u77e5\u9053\u5b83\u7684\u539f\u7406\u4e48\uff1f"},"content":{"rendered":"

\u7b80\u4ecb\uff1a\u00a0\u5728\u5199Java\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u6700\u70e6\u5199setter\/getter\u65b9\u6cd5\uff0c\u81ea\u4ece\u6709\u4e86Lombok\u63d2\u4ef6\u4e0d\u7528\u518d\u5199\u90a3\u4e9b\u65b9\u6cd5\u4e4b\u540e\uff0c\u611f\u89c9\u518d\u4e5f\u56de\u4e0d\u53bb\u4e86\uff0c\u90a3\u4f60\u4eec\u662f\u5426\u597d\u5947\u8fc7Lombok\u662f\u600e\u4e48\u628asetter\/getter\u65b9\u6cd5\u7ed9\u4f60\u52a0\u4e0a\u53bb\u7684\u5462\uff1f\u6709\u7684\u540c\u5b66\u8bf4\u6211\u4eecJava\u5f15\u5165Lombok\u4e4b\u540e\u4f1a\u6c61\u67d3\u4f9d\u8d56\u5305\uff0c\u90a3\u6211\u4eec\u53ef\u4e0d\u53ef\u4ee5\u81ea\u5df1\u5199\u4e00\u4e2a\u5de5\u5177\u6765\u4ee3\u66ffLombok\u5462\uff1f
\"\u56fe\u7247\"
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\"\u56fe\u7247\"
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\"\u56fe\u7247\"
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@Target(ElementType.TYPE) \/\/ \u7528\u4e8e\u4fee\u9970\u7c7b
public @interface MySetterGetter {
}
\u521b\u5efa\u4e00\u4e2a\u9700\u8981\u751f\u6210setter\/getter\u65b9\u6cd5\u7684\u5b9e\u4f53\u7c7b@MySetterGetter \/\/ \u6253\u4e0a\u6211\u4eec\u7684\u6ce8\u89e3
public class Test {<\/p>\n

private String wzj;<\/code><\/pre>\n
}
\u63a5\u4e0b\u6765\u5c31\u6765\u770b\u4e00\u770b\u5982\u4f55\u6765\u751f\u6210\u6211\u4eec\u60f3\u8981\u7684\u5b57\u7b26\u4e32\u3002\u6574\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a@SupportedAnnotationTypes(“com.study.practice.nameChecker.MySetterGetter”)
@SupportedSourceVersion(SourceVersion.RELEASE_8)
public class MySetterGetterProcessor extends AbstractProcessor {<\/p>\n
\/\/ \u4e3b\u8981\u662f\u8f93\u51fa\u4fe1\u606f\nprivate Messager messager;\nprivate JavacTrees javacTrees;\n\nprivate TreeMaker treeMaker;\nprivate Names names;\n@Override\npublic synchronized void init(ProcessingEnvironment processingEnv) {\n    super.init(processingEnv);\n    this.messager = processingEnv.getMessager();\n    this.javacTrees = JavacTrees.instance(processingEnv);\n    Context context = ((JavacProcessingEnvironment)processingEnv).getContext();\n    this.treeMaker = TreeMaker.instance(context);\n    this.names = Names.instance(context);\n}\n\n@Override\npublic boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {\n    \/\/ \u62ff\u5230\u88ab\u6ce8\u89e3\u6807\u6ce8\u7684\u6240\u6709\u7684\u7c7b\n    Set<? extends Element> elementsAnnotatedWith = roundEnv.getElementsAnnotatedWith(MySetterGetter.class);\n    elementsAnnotatedWith.forEach(element -> {\n        \/\/ \u5f97\u5230\u7c7b\u7684\u62bd\u8c61\u6811\u7ed3\u6784\n        JCTree tree = javacTrees.getTree(element);\n        \/\/ \u904d\u5386\u7c7b\uff0c\u5bf9\u7c7b\u8fdb\u884c\u4fee\u6539\n        tree.accept(new TreeTranslator(){\n            @Override\n            public void visitClassDef(JCTree.JCClassDecl jcClassDecl) {\n                List<JCTree.JCVariableDecl> jcVariableDeclList = List.nil();\n                \/\/ \u5728\u62bd\u8c61\u6811\u4e2d\u627e\u51fa\u6240\u6709\u7684\u53d8\u91cf\n                for(JCTree jcTree: jcClassDecl.defs){\n                    if (jcTree.getKind().equals(Tree.Kind.VARIABLE)){\n                        JCTree.JCVariableDecl jcVariableDecl = (JCTree.JCVariableDecl)jcTree;\n                        jcVariableDeclList = jcVariableDeclList.append(jcVariableDecl);\n                    }\n                }\n                \n                \/\/ \u5bf9\u4e8e\u53d8\u91cf\u8fdb\u884c\u751f\u6210\u65b9\u6cd5\u7684\u64cd\u4f5c\n                for (JCTree.JCVariableDecl jcVariableDecl : jcVariableDeclList) {\n                    messager.printMessage(Diagnostic.Kind.NOTE, jcVariableDecl.getName() + " has been processed");\n                    jcClassDecl.defs = jcClassDecl.defs.prepend(makeSetterMethodDecl(jcVariableDecl));\n\n                    jcClassDecl.defs = jcClassDecl.defs.prepend(makeGetterMethodDecl(jcVariableDecl));\n                }\n\n\n    \/\/ \u751f\u6210\u8fd4\u56de\u5bf9\u8c61\n    JCTree.JCExpression methodType = treeMaker.Type(new Type.JCVoidType());\n\n    return treeMaker.MethodDef(treeMaker.Modifiers(Flags.PUBLIC), getNewSetterMethodName(jcVariableDecl.getName()), methodType, List.nil(), parameters, List.nil(), block, null);\n}\n\/**\n * \u751f\u6210 getter \u65b9\u6cd5\n * @param jcVariableDecl\n * @return\n *\/\nprivate JCTree.JCMethodDecl makeGetterMethodDecl(JCTree.JCVariableDecl jcVariableDecl){\n    ListBuffer<JCTree.JCStatement> statements = new ListBuffer<>();\n    \/\/ \u751f\u6210\u8868\u8fbe\u5f0f\n    JCTree.JCReturn aReturn = treeMaker.Return(treeMaker.Ident(jcVariableDecl.getName()));\n    statements.append(aReturn);\n    JCTree.JCBlock block = treeMaker.Block(0, statements.toList());\n    \/\/ \u65e0\u5165\u53c2\n    \/\/ \u751f\u6210\u8fd4\u56de\u5bf9\u8c61\n    JCTree.JCExpression returnType = treeMaker.Type(jcVariableDecl.getType().type);\n    return treeMaker.MethodDef(treeMaker.Modifiers(Flags.PUBLIC), getNewGetterMethodName(jcVariableDecl.getName()), returnType, List.nil(), List.nil(), List.nil(), block, null);\n}\n\/**\n * \u62fc\u88c5Setter\u65b9\u6cd5\u540d\u79f0\u5b57\u7b26\u4e32\n * @param name\n * @return\n *\/\nprivate Name getNewSetterMethodName(Name name) {\n    String s = name.toString();\n    return names.fromString("set" + s.substring(0,1).toUpperCase() + s.substring(1, name.length()));\n}\n\/**\n * \u62fc\u88c5 Getter \u65b9\u6cd5\u540d\u79f0\u7684\u5b57\u7b26\u4e32\n * @param name\n * @return\n *\/\nprivate Name getNewGetterMethodName(Name name) {\n    String s = name.toString();\n    return names.fromString("get" + s.substring(0,1).toUpperCase() + s.substring(1, name.length()));\n}\n\/**\n * \u751f\u6210\u8868\u8fbe\u5f0f\n * @param lhs\n * @param rhs\n * @return\n *\/\nprivate JCTree.JCExpressionStatement makeAssignment(JCTree.JCExpression lhs, JCTree.JCExpression rhs) {\n    return treeMaker.Exec(\n            treeMaker.Assign(lhs, rhs)\n    );\n}<\/code><\/pre>\n
}\u4ee3\u7801\u6709\u70b9\u591a\uff0c\u6211\u4eec\u9010\u4e00\u62c6\u89e3\u8bf4\u660e\uff1a\u4e0b\u9762\u8fd9\u662f\u6574\u4e2a\u4ee3\u7801\u7ed3\u6784\u7684\u8111\u56fe\uff0c\u540e\u9762\u7684\u8bb2\u89e3\u4f1a\u57fa\u4e8e\u8fd9\u4e2a\u987a\u5e8f\u3002\u00a0
\"\u56fe\u7247\"
\u00a0a. \u6ce8\u89e3@SupportedAnnotationTypes \u8868\u793a\u6211\u4eec\u9700\u8981\u76d1\u542c\u7684\u6ce8\u89e3\uff0c\u6bd4\u5982\u6211\u4eec\u4e4b\u524d\u5b9a\u4e49\u7684 @MySetterGetter\u3002@SupportedSourceVersion \u8868\u793a\u6211\u4eec\u60f3\u8981\u5bf9\u4ec0\u4e48\u7248\u672c\u7684Java\u6e90\u4ee3\u7801\u8fdb\u884c\u5904\u7406\u3002b. \u7236\u7c7bAbstractProcessor\u662f\u672c\u6b21\u7684\u6838\u5fc3\u7c7b\uff0c\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u7684\u65f6\u5019\u4f1a\u626b\u63cf\u6b64\u7c7b\u7684\u5b50\u7c7b\u3002\u5176\u4e2d\u6709\u4e00\u4e2a\u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u7684\u6838\u5fc3\u65b9\u6cd5 public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv)\uff0c\u6b64\u65b9\u6cd5\u5982\u679c\u662f\u8fd4\u56de\u4e3atrue\u5c31\u8bf4\u660e\u7f16\u8bd1\u7684\u90a3\u4e2a\u7c7b\u62bd\u8c61\u6811\u7684\u7ed3\u6784\u53c8\u53d8\u5316\uff0c\u9700\u8981\u91cd\u65b0\u8fdb\u884c\u8bcd\u6cd5\u5206\u6790\u548c\u8bed\u6cd5\u5206\u6790\uff08\u53ef\u4ee5\u67e5\u770b\u4e0a\u9762\u63d0\u5230\u7684\u90a3\u4e2a\u7f16\u8bd1\u6d41\u7a0b\u56fe\uff09\u3002\u5982\u679c\u8fd4\u56de\u7684\u662ffalse\u5c31\u8bf4\u660e\u6ca1\u6709\u53d8\u5316\u3002c. process\u65b9\u6cd5\u4e3b\u8981\u7684\u64cd\u4f5c\u903b\u8f91\u662f\uff1a1\u3001\u62ff\u5230\u6240\u6709\u88ab\u6211\u4eecMySetterGetter\u6807\u6ce8\u7684\u7c7b\u30022\u3001\u904d\u5386\u6240\u6709\u7684\u7c7b\uff0c\u751f\u6210\u7c7b\u7684\u62bd\u8c61\u6811\u7ed3\u6784\u30023\u3001\u5bf9\u7c7b\u8fdb\u884c\u64cd\u4f5c\uff1aa.\u627e\u5230\u7c7b\u4e2d\u6240\u6709\u7684\u53d8\u91cf\u3002b.\u5bf9\u53d8\u91cf\u8fdb\u884c\u751f\u6210Set\u548cGet\u65b9\u6cd5\u30024\u3001\u8fd4\u56de true\uff0c\u8bf4\u660e\u7c7b\u7ed3\u6784\u53d8\u4e86\uff0c\u9700\u8981\u91cd\u65b0\u89e3\u6790\u3002\u5982\u679c\u662ffalse\u8bf4\u660e\u6ca1\u6709\u53d8\uff0c\u4e0d\u7528\u91cd\u65b0\u89e3\u6790\u3002d. \u64cd\u4f5cJCTree\u6811\u4e3b\u8981\u662f\u5728\u64cd\u4f5c\u62bd\u8c61\u6811\uff0c\u53ef\u4ee5\u67e5\u770b\u6587\u672b\u9644\u4ef6\u4e2d\u7684\u6587\u7ae0\u8fdb\u884c\u5b66\u4e60\u3002e. \u65b9\u6cd5\u540d\u79f0\u62fc\u63a5\u8fd9\u4e00\u5757\u513f\u548c\u5b57\u7b26\u4e32\u62fc\u63a5\u6ca1\u5565\u533a\u522b\uff0c\u7528\u8fc7\u53cd\u5c04\u7684\u540c\u5b66\u5e94\u8be5\u4e5f\u90fd\u6e05\u695a\u8fd9\u4e2a\u64cd\u4f5c\u4e86\u3002\u5230\u6b64\u4e3a\u6b62\uff0c\u6211\u4eec\u5c31\u5df2\u7ecf\u4ecb\u7ecd\u5b8c\u4e86Lombok\u7684\u539f\u7406\u3002\u600e\u4e48\u6837\u662f\u4e0d\u662f\u5f88\u7b80\u5355\u3002\u63a5\u4e0b\u6765\uff0c\u5c31\u8ba9\u6211\u4eec\u628a\u5b83\u8fd0\u884c\u8d77\u6765\uff0c\u6295\u5165\u5230\u5b9e\u6218\u4e4b\u4e2d\u3002f. \u8fd0\u884c\u6700\u540e\u6765\u770b\u4e00\u4e0b\u5982\u4f55\u6b63\u786e\u7684\u8fd0\u884c\u8fd9\u4e2a\u6211\u4eec\u5199\u7684\u5de5\u5177\u30021.\u73af\u5883\u6211\u7684\u7cfb\u7edf\u73af\u5883\u662f macOs Monterey\uff1bjava\u7248\u672c\u662fopenjdk version “1.8.0_302”
OpenJDK Runtime Environment (Temurin)(build 1.8.0_302-b08)
OpenJDK 64-Bit Server VM (Temurin)(build 25.302-b08, mixed mode)
2.\u7f16\u8bd1processor\u5728\u4f60\u5b58\u653e MySetterGetter \u548c MySetterGetterProcessor \u4e24\u4e2a\u7c7b\u7684\u76ee\u5f55\u4e0b\u8fdb\u884c\u7f16\u8bd1\u3002javac -cp $JAVA_HOME\/lib\/tools.jar MySetterGetter.java MySetterGetterProcessor.java
\u6267\u884c\u6210\u529f\u540e\u4f1a\u51fa\u73b0\u8fd9\u4e09\u4e2aclass\u6587\u4ef6\u3002\u00a0
\"\u56fe\u7247\"
\u00a03.\u58f0\u660e\u63d2\u5165\u5f0f\u6ce8\u89e3\u5904\u7406\u5668\u00a0
\"\u56fe\u7247\"
\u00a0\u5728\u4f60\u7684\u5de5\u7a0b\u7684resources\u4e0b\u9762\u521b\u5efa\u4e00\u4e2a\u5305\uff0c\u540d\u79f0\u4e3a\uff1aMETA-INFO.services\u7136\u540e\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6\uff0c\u540d\u79f0\u4e3a\uff1ajavax.annotation.processing.Processor\u5c06\u4f60\u7684\u6ce8\u89e3\u5904\u7406\u5668\u7684\u5730\u5740\u586b\u5165\uff0c\u6211\u7684\u914d\u7f6e\u662f\u8fd9\u6837\u7684\uff1acom.study.practice.nameChecker.MySetterGetterProcessor4.\u7528\u6211\u4eec\u7684\u5de5\u5177\u53bb\u7f16\u8bd1\u76ee\u6807\u7c7b\u6bd4\u5982\u6211\u4eec\u672c\u6b21\u662f\u8981\u7f16\u8bd1\u90a3\u4e2atest.java\u3002\u5b83\u7684\u5185\u5bb9\u518d\u56de\u987e\u4e00\u4e0b\uff1a@MySetterGetter  \/\/ \u6253\u4e0a\u6211\u4eec\u7684\u6ce8\u89e3
public class Test {<\/p>\n
private String wzj;<\/code><\/pre>\n
}
\u7136\u540e\u6211\u4eec\u5c31\u53bb\u7f16\u8bd1\u5b83\uff08\u6ce8\u610f\u7c7b\u524d\u9762\u7684\u8def\u5f84\u3002\u8fd9\u4e2a\u4f60\u4eec\u5f97\u6362\u6210\u81ea\u5df1\u7684\u5de5\u7a0b\u76ee\u5f55\u3002\uff09javac -processor com.study.practice.nameChecker.MySetterGetterProcessor com\/study\/practice\/nameChecker\/Test.java
\u6267\u884c\u4e4b\u540e\u5982\u679c\u6ca1\u6709\u4fee\u6539\u6211\u7684\u4ee3\u7801\u7684\u8bdd\u4f1a\u6253\u5370\u8fd9\u51e0\u4e2a\u5b57\u7b26\u4e32\uff1aprocess 1
process 2
\u6ce8: wzj has been processed
process 1
\u6700\u540e\u4f1a\u751f\u6210Test.class\u6587\u4ef6\u3002\u00a0
\"\u56fe\u7247\"
\u00a05.\u6210\u679c\u6700\u540e\u7684class\u6587\u4ef6\u89e3\u6790\u51fa\u6765\u5c31\u662f\u8fd9\u4e2a\u6837\u5b50\u7684\u3002\u5982\u4e0b\u56fe\u6240\u793a\uff1a\u00a0
\"\u56fe\u7247\"
\u00a0\u770b\u5230Setter\/Getter\u65b9\u6cd5\u5c31\u8bf4\u660e\u6211\u4eec\u5df2\u7ecf\u5927\u529f\u544a\u6210\u4e86\uff01\u662f\u4e0d\u662f\u5f88\u7b80\u5355\u3002\u5230\u6b64\u4e3a\u6b62\uff0c\u6211\u4eec\u5c31\u5b66\u4f1a\u4e86\u5982\u4f55\u81ea\u5df1\u5199\u4e00\u4e2a\u5c5e\u4e8e\u81ea\u5df1\u7684\u7b80\u6613Lombok\u7684\u63d2\u4ef6\u4e86\u3002\u9644\u4ef6treemarker \u7684\u4ecb\u7ecd:http:\/\/www.docjar.com\/docs\/ap…<\/a>\u00a0ModelScope\u5f00\u6e90\u6a21\u578b\u793e\u533a\u8bc4\u6d4b\u5f81\u96c6\u4ee4\u00a0ModelScope\u5f00\u6e90\u6a21\u578b\u793e\u533a\u8bc4\u6d4b\u4e13\u573a\u91cd\u78c5\u6765\u88ad\uff0c\u53d1\u5e03\u4f60\u7684\u8bc4\u6d4b\uff0c\u514d\u8d39\u4f7f\u7528\u6a21\u578b\u5e93\u642d\u5efa\u5c5e\u4e8e\u4f60\u7684\u5e94\u7528\uff0c\u6709\u673a\u4f1a\u83b7\u5f97AirPods\u548c\u963f\u91cc\u4e91\u5b9a\u5236\u793c\u54c1\uff0c\u66f4\u6709\u591a\u91cd\u798f\u5229\uff0c\u70b9\u51fb\u8fd9\u91cc\u67e5\u770b\u6d3b\u52a8\u8be6\u60c5\u3002\u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/click.aliyun.com\/m\/10…<\/a>\u672c\u6587\u4e3a\u963f\u91cc\u4e91\u539f\u521b\u5185\u5bb9\uff0c\u672a\u7ecf\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002<\/p>\n
https:\/\/segmentfault.com\/a\/1190000042310408<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u7b80\u4ecb\uff1a\u00a0\u5728\u5199Java\u4ee3\u7801\u7684\u65f6\u5019\uff0c\u6700\u70e6\u5199setter\/getter\u65b9\u6cd5\uff0c\u81ea\u4ece\u6709\u4e86Lombok\u63d2\u4ef6\u4e0d\u7528\u518d\u5199\u90a3\u4e9b\u65b9\u6cd5 […]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006195","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006195","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"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006195"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006195\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006195"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006195"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006195"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}