{"id":2522,"date":"2022-11-09T21:09:23","date_gmt":"2022-11-09T13:09:23","guid":{"rendered":"http:\/\/tihar-tech.cn\/?p=2522"},"modified":"2022-11-09T21:25:51","modified_gmt":"2022-11-09T13:25:51","slug":"builder-pattern-%e6%b5%81%e7%a8%8b%e5%bc%8f%e7%94%9f%e6%88%90%e5%af%b9%e8%b1%a1%e7%bb%84%e5%90%88","status":"publish","type":"post","link":"http:\/\/139.196.114.170\/?p=2522","title":{"rendered":"Builder Pattern – \u6d41\u7a0b\u5f0f\u751f\u6210\u5bf9\u8c61\u7ec4\u5408"},"content":{"rendered":"

\u672c\u8d28<\/h3>\n

\u5c01\u88c5\u5bf9\u8c61\u4e4b\u95f4\u7684\u7ec4\u5408\uff1aDirector\u6253\u5305\u4ea7\u54c1\u7531\u54ea\u4e9b\u96f6\u4ef6\u7ec4\u5408\u3001\u5982\u4f55\u7ec4\u5408\u7684\u903b\u8f91
\n\u5c01\u88c5\u5bf9\u8c61\u521b\u5efa\u4e0e\u4f9d\u8d56\uff1aBuilder\u6253\u5305\u4e00\u79cd\u4ea7\u54c1\u4e2d\u5404\u96f6\u4ef6\u7684\u521b\u5efa\u7ec6\u8282\uff0c\u4ee5\u53ca\u4ea7\u54c1\u548c\u96f6\u4ef6\u7684\u88c5\u914d\u5173\u7cfb<\/p>\n

\u5e94\u7528\u573a\u666f\u539f\u7406<\/h3>\n

\u5bf9\u8c61\u7531\u591a\u4e2a\u90e8\u5206\u7ec4\u5408\u800c\u6210\uff08\u4e1a\u52a1\u53ef\u53d8\u90e8\u5206\uff09
\n\u5bf9\u8c61\u6709\u8f83\u4e3a\u56fa\u5b9a\u7684\u521b\u5efa\u6d41\u7a0b\uff08\u4e1a\u52a1\u4e0d\u53d8\u90e8\u5206\uff09<\/p>\n

\u6848\u4f8b\u5b9e\u73b0<\/h3>\n

Builder\u81ea\u5b9a\u4e49Product<\/h4>\n

\u4ee5\u4e0b\u6848\u4f8b\u5c55\u793a\u4e86Builder Pattern\u7684\u4e00\u79cd\u5b9e\u73b0\uff1a\u76ee\u7684\u662f\u8bfb\u53d6\u914d\u7f6e\u6587\u4ef6\uff0c\u751f\u6210\u6307\u5b9a\u987a\u5e8f\u548c\u5b57\u6bb5\u7ec4\u6210\u7684list\u5bf9\u8c61
\nDirector\u6307\u5b9aProduct\u7684\u751f\u6210\u903b\u8f91\uff1a\u6309\u987a\u5e8f\u7ec4\u88c5\u4e09\u4e2a\u96f6\u4ef6\u5f62\u6210\u4ea7\u54c1
\nBuilder\u6307\u5b9aProduct\u7684\u5177\u4f53\u5b9e\u73b0\uff1a\u81ea\u5b9a\u4e49Product\u4e3aList\u7c7b\u578b\uff0c\u5b9e\u73b0buildPart()\u65b9\u6cd5\u8bfb\u53d6\u6587\u4ef6\u5bf9\u5e94\u5b57\u6bb5\u751f\u6210\u5404\u96f6\u4ef6\uff0c\u5e76\u5c06\u96f6\u4ef6\u88c5\u914d\u5230list\u4e2d<\/p>\n

UML<\/h5>\n

\"builder-pattern-custom\"<\/p>\n

\u63a5\u53e3<\/h5>\n
\npublic interface Director {\n    void Construct(Builder builder);\n}\n\npublic interface Builder {\n    void buildPart1();\n\n    void buildPart2();\n\n    void buildPart3();\n\n    void createProduct();\n}\n<\/pre>\n
\u5b9e\u73b0\u7c7b<\/h5>\n
\npublic class CustomDirectorImpl implements Director {\n\n    @Override\n    public void Construct(Builder builder) {\n        builder.createProduct();\n        builder.buildPart1();\n        builder.buildPart2();\n        builder.buildPart3();\n    }\n}\n\npublic class CustomBuilderImpl implements Builder {\n    private List product;\n\n    private MapBuiltFromConfiguration map = MapBuiltFromConfiguration.getInstance();\n\n    @Override\n    public void buildPart1() {\n        putPartbyKey(MapBuiltFromConfiguration.PART_ONE_KEY);\n    }\n\n    @Override\n    public void buildPart2() {\n        putPartbyKey(MapBuiltFromConfiguration.PART_TWO_KEY);\n    }\n\n    @Override\n    public void buildPart3() {\n        putPartbyKey(MapBuiltFromConfiguration.PART_THREE_KEY);\n    }\n\n    @Override\n    public void createProduct() {\n        product = new ArrayList<>();\n        map.readAttributefromConfigurationFile();\n    }\n\n    private void putPartbyKey(String key) {\n        String val = map.getVal(key);\n        if (val != null) product.add(val);\n    }\n\n    public List getProduct() {\n        return product;\n    }\n}\n<\/pre>\n
\u8f85\u52a9\u5de5\u5177\u7c7b<\/h5>\n
\npublic class MapBuiltFromConfiguration {\n    public static final String PART_ONE_KEY = \"PART1\";\n    public static final String PART_TWO_KEY = \"PART2\";\n    public static final String PART_THREE_KEY = \"PART3\";\n    private static final String READ_FILE_PATH = \"src\/BuilderPattern\/custom\/part.conf\";\n    private static final String GET_PART_REGEX = \"(PART\\\\d+)\\\\s*:\\\\s*(.+)\";\n    private HashMap map = new HashMap<>();\n\n    private static MapBuiltFromConfiguration bean = null;\n\n    public static MapBuiltFromConfiguration getInstance() {\n        return bean == null ? new MapBuiltFromConfiguration() : bean;\n    }\n\n    public void readAttributefromConfigurationFile() {\n        String line = null;\n        FileReader fileReader = null;\n        BufferedReader bufferedReader = null;\n\n        try {\n            fileReader = new FileReader(READ_FILE_PATH);\n            bufferedReader = new BufferedReader(fileReader);\n            while ((line = bufferedReader.readLine()) != null)\n                analyzeLineAndBuildMap(line);\n        } catch (IOException e) {\n            throw new RuntimeException(e);\n        } finally {\n            try {\n                if (fileReader != null) fileReader.close();\n                if (bufferedReader != null) bufferedReader.close();\n            } catch (IOException e) {\n                throw new RuntimeException(e);\n            }\n        }\n    }\n\n    private void analyzeLineAndBuildMap(String line) {\n        Pattern pattern = Pattern.compile(GET_PART_REGEX);\n        Matcher matcher = pattern.matcher(line);\n        if (matcher.find()) {\n            String key = matcher.group(1);\n            String val = matcher.group(2);\n            map.put(key, val);\n        }\n    }\n\n    public String getVal(String key) {\n        return map.get(key);\n    }\n}\n<\/pre>\n
\u6d4b\u8bd5\u7c7b<\/h5>\n
\npublic class Client {\n    public static void main(String[] args) {\n        CustomBuilderImpl builder = new CustomBuilderImpl();\n        Director director = new CustomDirectorImpl();\n        director.Construct(builder);\n        List product = builder.getProduct();\n        System.out.println(product);\n    }\n}\n<\/pre>\n
\u8be6\u7ec6\u8bf4\u660e<\/h3>\n
Builder\u548cDirector\u4e3a\u4ec0\u4e48\u8981\u5206\u5f00\uff1f<\/h4>\n
\u5408\u5e76\u5bf9\u8c61\u7684\u521b\u5efa\u6d41\u7a0b\uff08Director\uff09\u548c\u521b\u5efa\u6b65\u9aa4\uff08Builder\uff09\uff0c\u5373\u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f<\/p>\n
\u5f00\u95ed\u539f\u5219<\/strong> \u652f\u6301\u6d41\u7a0b\u4e1a\u52a1\u53d8\u66f4\u3002\u5f53\u6d41\u7a0b\u9700\u6c42\u53d8\u66f4\u65f6\uff0c\u6a21\u677f\u65b9\u6cd5\u6a21\u5f0f\u9700\u8981\u6253\u5f00\u7c7b\u4fee\u6539\u6216\u589e\u52a0\u6d41\u7a0b\u65b9\u6cd5\uff1b\u800c\u5206\u5f00\u65f6\uff0c\u4ec5\u9700\u65b0\u589e\u4e00\u4e2a\u81ea\u5b9a\u4e49\u6d41\u7a0b\u7c7b\u800c\u65e0\u9700\u66f4\u6539\u4efb\u4f55\u5df2\u6709\u90e8\u5206<\/p>\n
\u5355\u4e00\u804c\u8d23<\/strong> \u62c6\u5206\u4f1a\u964d\u4f4e\u5355\u4e00\u7c7b\u7684\u590d\u6742\u5ea6\uff0c\u540c\u65f6\u8ba9\u7c7b\u7684\u804c\u8d23\u66f4\u4e3a\u6e05\u6670<\/p>\n
\u4e0d\u540c\u7684director\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684builder<\/p>\n
director() {
\n  buildpart1
\n  buildpart3
\n  buildpart2
\n}
\nabstract buildpart1
\nabstract buildpart2
\nabstract buildpart3<\/p>\n
\u4e3a\u4ec0\u4e48\u4e0d\u521b\u5efaProduct\u63a5\u53e3\uff1f<\/h4>\n
\u9996\u5148\u660e\u786eproduct\u7684\u521b\u5efa\u6d41\u7a0b\uff1a
\n1\uff09\u5728Builder\u4e2d\u521b\u5efaproduct\u5b9e\u4f8b
\n2\uff09\u4f9d\u636eDirector\u63d0\u4f9b\u7684\u6d41\u7a0b\uff0c\u5c06Builder\u4e2d\u7684buildPart()\u751f\u6210\u7684\u5404\u7ec4\u6210\u90e8\u5206\u88c5\u914d\u5165product
\n3\uff09\u6700\u7ec8\u7531getProduct()\u8fd4\u56de\u5b9e\u4f8b<\/p>\n
\u56de\u5230\u95ee\u9898\uff0c\u521b\u4e0d\u521b\u5efaProduct\u63a5\u53e3\u53d6\u51b3\u4e8e\u4e1a\u52a1\uff1a
\n1\uff09\u5982\u679c\u4e1a\u52a1\u4fdd\u8bc1product\u5b9e\u4f8b\u6ee1\u8db3\u540c\u4e00\u4e2a\u6807\u51c6\uff0c\u5b8c\u5168\u53ef\u4ee5\u5728\u4e0a\u8ff01\uff093\uff09\u4e2d\u4f7f\u7528Product\u63a5\u53e3\uff0c\u8fdb\u4e00\u6b65\u89e3\u8026\u5e76\u63d0\u5347\u590d\u7528\uff08\u8be6\u89c1\u4e0a\u4f8bProcessDirectorImpl\uff09
\n2\uff09\u5982\u679c\u4e1a\u52a1\u4e2dproduct\u5728\u6ee1\u8db3\u7edf\u4e00\u521b\u5efa\u6d41\u7a0b\u7684\u57fa\u7840\u4e0a\uff0c\u7ec4\u6210\u7ed3\u6784\u4e0d\u5b8c\u5168\u4e00\u81f4\uff0c\u6b64\u65f61\uff093\uff09\u5904\u4e0d\u4f7f\u7528\u63a5\u53e3\u4f1a\u7ed9\u4e88\u66f4\u591a\u7075\u6d3b\u6027\uff1aBuilder\u53ef\u4ee5\u521b\u9020\u5b8c\u5168\u7531Builder\u81ea\u5b9a\u4e49\u7684Product\uff08\u8be6\u89c1\u4e0a\u4f8bCustomBuilderImpl\uff09<\/p>\n
\u53c2\u8003\u8d44\u6599<\/h3>\n
Gamma E. \u8bbe\u8ba1\u6a21\u5f0f\uff1a\u53ef\u590d\u7528\u9762\u5411\u5bf9\u8c61\u8f6f\u4ef6\u7684\u57fa\u7840[M]. 1. \u673a\u68b0\u5de5\u4e1a\u51fa\u7248\u793e, 2019.<\/p>\n","protected":false},"excerpt":{"rendered":"
\u672c\u8d28 \u5c01\u88c5\u5bf9\u8c61\u4e4b\u95f4\u7684\u7ec4\u5408\uff1aDirector\u6253\u5305\u4ea7\u54c1\u7531\u54ea\u4e9b\u96f6\u4ef6\u7ec4\u5408\u3001\u5982\u4f55\u7ec4\u5408\u7684\u903b\u8f91 \u5c01\u88c5\u5bf9\u8c61\u521b\u5efa\u4e0e\u4f9d\u8d56\uff1aBuil … <\/p>\n
\u7ee7\u7eed\u9605\u8bfb\u201cBuilder Pattern – \u6d41\u7a0b\u5f0f\u751f\u6210\u5bf9\u8c61\u7ec4\u5408\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[31],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/2522"}],"collection":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2522"}],"version-history":[{"count":10,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/2522\/revisions"}],"predecessor-version":[{"id":2534,"href":"http:\/\/139.196.114.170\/index.php?rest_route=\/wp\/v2\/posts\/2522\/revisions\/2534"}],"wp:attachment":[{"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2522"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/139.196.114.170\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}