{"id":250,"date":"2013-01-07T22:57:29","date_gmt":"2013-01-07T14:57:29","guid":{"rendered":"http:\/\/lg.yusemo.com\/?p=250"},"modified":"2013-01-13T23:24:08","modified_gmt":"2013-01-13T15:24:08","slug":"builder-builder-mode","status":"publish","type":"post","link":"https:\/\/lg.yusemo.com\/?p=250","title":{"rendered":"Java\u4e0e\u6a21\u5f0f5:builder(\u751f\u6210\u5668)\u6a21\u5f0f"},"content":{"rendered":"

Java\u4e0e\u6a21\u5f0f5:builder(\u751f\u6210\u5668)\u6a21\u5f0f<\/a><\/h2>\n

builder(\u751f\u6210\u5668)\u6a21\u5f0f:\u5c06\u4e00\u4e2a\u4ea7\u54c1\u7684\u5185\u90e8\u8868\u8c61\u4e0e\u4ea7\u54c1\u7684\u751f\u6210\u8fc7\u7a0b\u5206\u5272\u5f00\u6765\uff0c\u4ece\u800c\u53ef\u4ee5\u4f7f\u4e00\u4e2a\u5efa\u9020\u8fc7\u7a0b\u751f\u6210\u5177\u6709\u4e0d\u540c\u7684\u5185\u90e8\u8868\u8c61\u7684\u4ea7\u54c1\u5bf9\u8c61\u3002<\/p>\n

\u751f\u6210\u5668\u6a21\u5f0f\u7684\u4e00\u4e2a\u793a\u4f8b\u6027\u7c7b\u56fe\uff1a<\/p>\n

\"builder\u6a21\u5f0f\u793a\u4f8b\u7c7b\u56fe\"<\/a>
builder\u6a21\u5f0f\u793a\u4f8b\u7c7b\u56fe<\/figcaption><\/figure>\n

\u5982\u4e0a\u56fe\u8bf4\u793a\u610f\u7684\u4e00\u6837\uff0c\u751f\u6210\u5668\u6a21\u5f0f\u5305\u62ec4\u4e2a\u89d2\u8272\uff1a<\/p>\n

\u62bd\u8c61\u5efa\u9020\u8005(builder)\u89d2\u8272<\/span>\uff1a\u7ed9\u51fa\u4e00\u4e2a\u62bd\u8c61\u63a5\u53e3\uff08\u7c7b\uff09\uff0c\u4ee5\u89c4\u8303\u4ea7\u54c1\u5bf9\u8c61\u7684\u5404\u4e2a\u7ec4\u6210\u6210\u5206\u7684\u5efa\u9020\u3002\u4e00\u822c\u800c\u8a00\uff0c\u6b64\u63a5\u53e3\u72ec\u7acb\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u5546\u4e1a\u903b\u8f91\u3002\u6a21\u5f0f\u4e2d\u76f4\u63a5\u521b\u5efa\u4ea7\u54c1\u5bf9\u8c61\u7684\u662f\u5177\u4f53\u5efa\u9020\u8005\u89d2\u8272\uff08concretebuilder\uff09\u89d2\u8272\u3002\u5177\u4f53\u5efa\u9020\u8005\u7c7b\u5fc5\u987b\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\u6240\u8981\u6c42\u7684\u4e24\u79cd\u65b9\u6cd5\uff1a\u4e00\u79cd\u662f\u5efa\u9020\u65b9\u6cd5\uff0c\u6bd4\u5982buildpart1()\u548cbuildpart2()\uff1b\u53e6\u4e00\u79cd\u662f\u7ed3\u679c\u8fd4\u8fd8\u65b9\u6cd5\uff0c\u5373\u672c\u4f8b\u5b50\u4e2d\u7684retrieveResult()\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u4ea7\u54c1\u6240\u5305\u542b\u7684\u96f6\u4ef6\u6570\u76ee\u4e0e\u5efa\u9020\u65b9\u6cd5\u7684\u6570\u76ee\u76f8\u7b26\u3002\u6362\u8a00\u4e4b\uff0c\u6709\u591a\u5c11\u96f6\u4ef6\uff0c\u5c31\u6709\u591a\u5c11\u76f8\u5e94\u7684\u5efa\u9020\u65b9\u6cd5\u3002<\/p>\n

\u5177\u4f53\u5efa\u9020\u8005(concrete builder)\u89d2\u8272<\/span>\uff1a\u62c5\u4efb\u8fd9\u4e2a\u89d2\u8272\u7684\u662f\u4e0e\u5e94\u7528\u7a0b\u5e8f\u903b\u8f91\u7d27\u5bc6\u76f8\u5173\u7684\u7c7b\uff0c\u4ed6\u4eec\u5728\u5e94\u7528\u7a0b\u5e8f\u7684\u8c03\u7528\u4e0b\u521b\u5efa\u4ea7\u54c1\u7684\u5b9e\u4f8b\u3002\u89d2\u8272\u8981\u5b8c\u6210\u7684\u4efb\u52a1\u5305\u62ec\uff1a<\/p>\n

1\uff09\u5b9e\u73b0\u62bd\u8c61\u5efa\u9020\u8005builder\u6240\u58f0\u660e\u7684\u63a5\u53e3\uff0c\u7ed9\u51fa\u4e00\u6b65\u4e00\u6b65\u5730\u5b8c\u6210\u521b\u5efa\u4ea7\u54c1\u5b9e\u4f8b\u7684\u64cd\u4f5c\u3002<\/p>\n

2\uff09\u5728\u5efa\u9020\u8fc7\u7a0b\u5b8c\u6210\u540e\uff0c\u63d0\u4f9b\u4ea7\u54c1\u7684\u5b9e\u4f8b<\/p>\n

\u5bfc\u6f14\u8005(Director)\u89d2\u8272<\/span>\uff1a\u62c5\u4efb\u8fd9\u4e2a\u89d2\u8272\u7684\u7c7b\u8c03\u7528\u5177\u4f53\u5efa\u9020\u8005\u89d2\u8272\u4ee5\u53ca\u521b\u5efa\u4ea7\u54c1\u5bf9\u8c61\u3002\u5e94\u5f53\u6307\u51fa\u7684\u662f\uff0c\u5bfc\u6f14\u8005\u5e76\u6ca1\u6709\u4ea7\u54c1\u7c7b\u7684\u5177\u4f53\u77e5\u8bc6\uff0c\u771f\u6b63\u62e5\u6709\u4ea7\u54c1\u5177\u4f53\u77e5\u8bc6\u7684\u662f\u5177\u4f53\u5efa\u9020\u8005\u89d2\u8272\u3002<\/p>\n

\u4ea7\u54c1\u89d2\u8272(Product)<\/span>\uff1a\u5efa\u9020\u4e2d\u56fd\u7684\u8d1f\u8d23\u5bf9\u8c61\uff0c\u4e00\u4e2a\u7cfb\u7edf\u4e2d\u4f1a\u6709\u591a\u4e2a\u4ea7\u54c1\u7c7b\uff0c\u800c\u4e14\u8fd9\u4e9b\u4ea7\u54c1\u7c7b\u5e76\u4e0d\u4e00\u5b9a\u6709\u5171\u540c\u7684\u63a5\u53e3\uff0c\u800c\u4e14\u5b8c\u5168\u53ef\u4ee5\u4e0d\u662f\u5411\u5173\u8054\u7684\u3002(\u8fd9\u4e2a\u65f6\u5019\u53ef\u4ee5\u4f7f\u7528\u6807\u8bc6\u63a5\u53e3)<\/p>\n

\u4e0a\u4f8b\u4e2ddirector\u4ee3\u7801\uff08\u5176\u4ed6\u6839\u636e\u7c7b\u56fe\u5f88\u5bb9\u6613\uff09\u5982\u4e0b\uff1a<\/p>\n

[code lang=”java”]
\npublic class Director {
\n Builder builder;
\n public Director(Builder builder) {
\n this.builder = builder;
\n }<\/p>\n

public void construct() {
\n builder.buildPart1();
\n builder.buildPart2();
\n builder.retrieveResult();
\n }<\/p>\n

}<\/p>\n

[\/code]<\/p>\n

\u5ba2\u6237\u7aef\u5728\u8c03\u7528\u7684\u65f6\u5019\u53ef\u4ee5\u8fd9\u4e48\u5199\uff1a<\/p>\n

[code lang=”java”]<\/p>\n

public class Client {<\/p>\n

public static void main(String[] args) {<\/p>\n

Director director = new Director(new ConcreteBuilder1());<\/p>\n

director.construct();<\/p>\n

}<\/p>\n

}<\/p>\n

[\/code]<\/p>\n

\u6ce8\uff1a<\/p>\n

1\uff09\u5982\u679c\u591a\u4e2a\u4ea7\u54c1\u7684\u96f6\u4ef6\u7684\u7ec4\u6210\u6b65\u9aa4\u76f8\u540c\u7684\u8bdd\uff0c\u5728builder\u62bd\u8c61\u65b9\u6cd5\u4e2d\u53ef\u4ee5\u5728retriveResult()\u65b9\u6cd5\u4e2d\u8fdb\u884c\u7edf\u4e00\u7684\u7ec4\u7ec7\u8fc7\u7a0b\uff0c\u5373\u5bf9\u901a\u7528\u7ec4\u7ec7\u8fc7\u7a0b\u7684\u62bd\u8c61\uff0c\u5e76\u975e\u4e00\u6210\u4e0d\u53d8\u7684\u5728builder\u4e2d\u4e0d\u7275\u6d89\u4e00\u70b9\u4e1a\u52a1\u903b\u8f91<\/p>\n

2\uff09\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u5982\u679c\u5177\u4f53\u5efa\u9020\u8005\u53ea\u6709\u4e00\u4e2a\u7684\u60c5\u51b5\u4e0b\uff0cDirector\u7684\u89d2\u8272\u662f\u53ef\u4ee5\u7701\u7565\u7684\u3002\u540c\u6837\u5efa\u9020\u8005\u548c\u5177\u4f53\u5efa\u9020\u8005\u53ef\u4ee5\u5408\u5e76\u4e3a\u4e00\u4e2a\u7c7b\u3002\u5176\u7ed3\u6784\u7c7b\u56fe\u5982\uff1a<\/p>\n

\"\u65e0\u5bfc\u6f14\u8005\u89d2\u8272\u7684\u7c7b\u56fe\"<\/a>
\u65e0\u5bfc\u6f14\u8005\u89d2\u8272\u7684\u7c7b\u56fe<\/figcaption><\/figure>\n

\u601d\u8003\uff1a\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u4f7f\u7528\u751f\u6210\u5668\u6a21\u5f0f\u5462\uff1f<\/p>\n

1\uff09\u9700\u8981\u751f\u6210\u7684\u4ea7\u54c1\u5bf9\u8c61\u6709\u590d\u6742\u7684\u5185\u90e8\u7ed3\u6784\u3002\u6bcf\u4e00\u4e2a\u5185\u90e8\u6210\u5206\u672c\u8eab\u53ef\u4ee5\u662f\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u4ec5\u4ec5\u662f\u4e00\u4e2a\u5bf9\u8c61\uff08\u5373\u4ea7\u54c1\u5bf9\u8c61\uff09\u7684\u4e00\u4e2a\u7ec4\u6210\u90e8\u5206<\/p>\n

2\uff09\u9700\u8981\u751f\u6210\u7684\u4ea7\u54c1\u5bf9\u8c61\u7684\u5c5e\u6027\u76f8\u4e92\u4f9d\u8d56\u3002\u5efa\u9020\u6a21\u5f0f\u53ef\u4ee5\u5f3a\u5236\u5b9e\u884c\u4e00\u79cd\u5206\u6b65\u9aa4\u8fdb\u884c\u7684\u5efa\u9020\u8fc7\u7a0b\uff0c\u56e0\u6b64\uff0c\u5982\u679c\u4ea7\u54c1\u5bf9\u8c61\u7684\u4e00\u4e2a\u5c5e\u6027\u5fc5\u987b\u5728\u53e6\u4e00\u4e2a\u5c5e\u6027\u88ab\u8d4b\u503c\u4e4b\u540e\u624d\u53ef\u4ee5\u8d4b\u503c\uff0c\u4f7f\u7528\u5efa\u9020\u6a21\u5f0f\u6bd4\u8f83\u9002\u5408\u3002<\/p>\n

3)\u5728\u5bf9\u8c61\u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u4f7f\u7528\u5230\u7cfb\u7edf\u4e2d\u7684\u5176\u4ed6\u4e00\u4e9b\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u5728\u4ea7\u54c1\u5bf9\u8c61\u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u4e0d\u6613\u5f97\u5230\u3002<\/p>\n

\u4f7f\u7528\u5efa\u9020\u6a21\u5f0f\u4e3b\u8981\u6709\u4ee5\u4e0b\u6548\u679c\uff1a<\/p>\n

a.\u5efa\u9020\u6a21\u5f0f\u7684\u4f7f\u7528\u4f7f\u5f97\u4ea7\u54c1\u7684\u5185\u90e8\u8868\u73b0\u53ef\u4ee5\u72ec\u7acb\u7684\u53d8\u5316\uff0c\u4f7f\u7528\u5efa\u9020\u6a21\u5f0f\u53ef\u4ee5\u4f7f\u5f97\u5ba2\u6237\u7aef\u4e0d\u5fc5\u77e5\u9053\u4ea7\u54c1\u5185\u90e8\u7ec6\u8282\u3002<\/p>\n

b.\u6bcf\u4e2abuilder\u90fd\u662f\u76f8\u5bf9\u72ec\u7acb\u7684\uff0c<\/p>\n

c.\u5efa\u9020\u7684\u4ea7\u54c1\u66f4\u6613\u4e8e\u63a7\u5236\u3002<\/p>\n

\u8fd9\u4e2a\u6a21\u5f0f\u5728\u7ed3\u6784\u4e0a\u548c\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u5f88\u662f\u76f8\u50cf\u3002\u4f46\u662f\u5176\u5b9e\u662f\u4e0d\u540c\u7684\uff0c\u5176\u539f\u56e0\u5728\u4e8e\uff0c\u62bd\u8c61\u5de5\u5382\u6a21\u5f0f\u4e2d\uff0c\u6bcf\u4e00\u4e2a\u5de5\u5382\u5bf9\u8c61\u88ab\u8c03\u7528\u7684\u65f6\u5019\u90fd\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5b8c\u6574\u7684\u4ea7\u54c1\u5bf9\u8c61\uff0c\u800c\u5ba2\u6237\u7aef\u53ef\u80fd\u4f1a\u51b3\u5b9a\u628a\u8fd9\u4e9b\u4ea7\u54c1\u7ec4\u6210\u4e00\u4e2a\u66f4\u590d\u6742\u7684\u4ea7\u54c1\u3002\u5efa\u9020\u7c7b\u662f\u4e00\u70b9\u4e00\u70b9\u9020\u6210\u4e00\u4e2a\u590d\u6742\u7684\u4ea7\u54c1\uff0c\u800c\u8fd9\u4e2a\u4ea7\u54c1\u7684\u7ec4\u88c5\u8fc7\u7a0b\u5c31\u53d1\u751f\u5728\u5efa\u9020\u8005\u89d2\u8272\u5185\u90e8\u3002\u5efa\u9020\u8005\u6a21\u5f0f\u7684\u5ba2\u6237\u7aef\u62ff\u5230\u7684\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u6700\u540e\u4ea7\u54c1\u3002<\/p>\n

\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u5c31\u53ef\u4ee5\u5c06\u4e0a\u8ff0\u6a21\u5f0f\u8fdb\u884c\u7ed3\u5408\u4f7f\u7528\uff0c\u5728\u5efa\u9020\u7c7b\u4e2d\u5c31\u53ef\u4ee5\u4f7f\u7528\u5de5\u5382\u6a21\u5f0f\u7684\u8bbe\u8ba1\uff0c\u8fd4\u56de\u4e00\u4e2a\u5b8c\u6574\u7684\u96f6\u4ef6\u3002<\/p>\n

\u8bbe\u8ba1\u6a21\u5f0f\u5b66\u4e60\u5217\u8868\uff1aJava\u8bbe\u8ba1\u6a21\u5f0f\u5b66\u4e60\u7b14\u8bb0<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Java\u4e0e\u6a21\u5f0f5:builder(\u751f\u6210\u5668)\u6a21\u5f0f builder(\u751f\u6210\u5668)\u6a21\u5f0f:\u5c06\u4e00\u4e2a\u4ea7\u54c1\u7684\u5185\u90e8\u8868\u8c61\u4e0e\u4ea7\u54c1\u7684\u751f\u6210\u8fc7\u7a0b\u5206\u5272\u5f00\u6765\uff0c\u4ece\u800c\u53ef\u4ee5\u4f7f\u4e00\u4e2a\u5efa\u9020\u8fc7\u7a0b\u751f\u6210\u5177\u6709\u4e0d\u540c\u7684\u5185\u90e8\u8868\u8c61\u7684\u4ea7\u54c1\u5bf9\u8c61\u3002 \u751f\u6210\u5668\u6a21\u5f0f\u7684\u4e00\u4e2a\u793a\u4f8b\u6027\u7c7b\u56fe\uff1a \u5982\u4e0a\u56fe\u8bf4\u793a\u610f\u7684\u4e00\u6837\uff0c\u751f\u6210\u5668\u6a21\u5f0f\u5305\u62ec4\u4e2a\u89d2\u8272\uff1a \u62bd\u8c61\u5efa\u9020\u8005(builder)\u89d2\u8272\uff1a\u7ed9\u51fa\u4e00\u4e2a…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts\/250"}],"collection":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=250"}],"version-history":[{"count":6,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts\/250\/revisions"}],"predecessor-version":[{"id":295,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=\/wp\/v2\/posts\/250\/revisions\/295"}],"wp:attachment":[{"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lg.yusemo.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}