{"id":633,"date":"2023-12-20T09:01:01","date_gmt":"2023-12-20T01:01:01","guid":{"rendered":""},"modified":"2023-12-20T09:01:01","modified_gmt":"2023-12-20T01:01:01","slug":"\u65b9\u6cd5\u91cd\u5199\u4e0e\u65b9\u6cd5\u91cd\u8f7d\u7684\u533a\u522b\u8be6\u89e3","status":"publish","type":"post","link":"https:\/\/mushiming.com\/633.html","title":{"rendered":"\u65b9\u6cd5\u91cd\u5199\u4e0e\u65b9\u6cd5\u91cd\u8f7d\u7684\u533a\u522b\u8be6\u89e3"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<div class=\"toc\">\n<h3>\u6587\u7ae0\u76ee\u5f55<\/h3>\n<ul>\n<li>1\u3001\u65b9\u6cd5\u91cd\u5199\uff08Override\uff09<\/li>\n<li>\n<ul>\n<li>\n<ul>\n<li>\u6982\u5ff5\uff1a<\/li>\n<li>\u597d\u5904\uff1a<\/li>\n<li>\u6ce8\u610f\uff1a<\/li>\n<li>\u91cd\u5199\u89c4\u5219\uff1a<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>2\u3001\u65b9\u6cd5\u91cd\u8f7d\uff08Overload\uff09<\/li>\n<li>\n<ul>\n<li>\n<ul>\n<li>\u6982\u5ff5\uff1a<\/li>\n<li>\u6ce8\u610f<\/li>\n<li>\u91cd\u8f7d\u89c4\u5219\uff1a<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>3\u3001\u91cd\u5199\u4e0e\u91cd\u8f7d\u76f4\u63a5\u7684\u533a\u522b<\/li>\n<li>4\u3001\u7b80\u660e\u4e86\u89e3<\/li>\n<li>5\u3001\u603b\u7ed3\uff08\u786c\uff09<\/li>\n<li>6\u3001\u56fe\u89e3<\/li>\n<\/ul>\n<\/div>\n<h1>1\u3001\u65b9\u6cd5\u91cd\u5199\uff08Override\uff09<\/h1>\n<h3>\u6982\u5ff5\uff1a<\/h3>\n<p>\u91cd\u5199\u662f\u5b50\u7c7b\u5bf9\u7236\u7c7b\u7684\u5141\u8bb8\u8bbf\u95ee\u7684\u65b9\u6cd5\u7684\u5b9e\u73b0\u8fc7\u7a0b\u8fdb\u884c\u91cd\u65b0\u7f16\u5199, \u8fd4\u56de\u503c\u548c\u5f62\u53c2\u90fd\u4e0d\u80fd\u6539\u53d8\u3002\u5373\u5916\u58f3\u4e0d\u53d8\uff0c\u6838\u5fc3\u91cd\u5199\uff01<\/p>\n<h3>\u597d\u5904\uff1a<\/h3>\n<p>\u91cd\u5199\u7684\u597d\u5904\u5728\u4e8e\u5b50\u7c7b\u53ef\u4ee5\u6839\u636e\u9700\u8981\uff0c\u5b9a\u4e49\u7279\u5b9a\u4e8e\u81ea\u5df1\u7684\u884c\u4e3a\u3002 \u4e5f\u5c31\u662f\u8bf4\u5b50\u7c7b\u80fd\u591f\u6839\u636e\u9700\u8981\u5b9e\u73b0\u7236\u7c7b\u7684\u65b9\u6cd5\u3002<\/p>\n<h3>\u6ce8\u610f\uff1a<\/h3>\n<p>\u91cd\u5199\u65b9\u6cd5\u4e0d\u80fd\u629b\u51fa\u65b0\u7684\u68c0\u67e5\u5f02\u5e38\u6216\u8005\u6bd4\u88ab\u91cd\u5199\u65b9\u6cd5\u7533\u660e\u66f4\u52a0\u5bbd\u6cdb\u7684\u5f02\u5e38\u3002\u4f8b\u5982\uff1a \u7236\u7c7b\u7684\u4e00\u4e2a\u65b9\u6cd5\u7533\u660e\u4e86\u4e00\u4e2a\u68c0\u67e5\u5f02\u5e38 IOException\uff0c\u4f46\u662f\u5728\u91cd\u5199\u8fd9\u4e2a\u65b9\u6cd5\u7684\u65f6\u5019\u4e0d\u80fd\u629b\u51fa Exception \u5f02\u5e38\uff0c\u56e0\u4e3a Exception \u662f IOException \u7684\u7236\u7c7b\uff0c\u53ea\u80fd\u629b\u51fa IOException \u7684\u5b50\u7c7b\u5f02\u5e38\u3002<\/p>\n<p>\u5728\u9762\u5411\u5bf9\u8c61\u539f\u5219\u91cc\uff0c\u91cd\u5199\u610f\u5473\u7740\u53ef\u4ee5\u91cd\u5199\u4efb\u4f55\u73b0\u6709\u65b9\u6cd5\u3002<\/p>\n<h3>\u91cd\u5199\u89c4\u5219\uff1a<\/h3>\n<p>\u53c2\u6570\u5217\u8868\u5fc5\u987b\u5b8c\u5168\u4e0e\u88ab\u91cd\u5199\u65b9\u6cd5\u7684\u76f8\u540c\uff1b<br \/> \u8fd4\u56de\u7c7b\u578b\u5fc5\u987b\u5b8c\u5168\u4e0e\u88ab\u91cd\u5199\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u76f8\u540c\uff1b<br \/> \u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u4e2d\u88ab\u91cd\u5199\u7684\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u66f4\u4f4e\u3002\u4f8b\u5982\uff1a\u5982\u679c\u7236\u7c7b\u7684\u4e00\u4e2a\u65b9\u6cd5\u88ab\u58f0\u660e\u4e3apublic\uff0c\u90a3\u4e48\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u8be5\u65b9\u6cd5\u5c31\u4e0d\u80fd\u58f0\u660e\u4e3aprotected\u3002<br \/> \u7236\u7c7b\u7684\u6210\u5458\u65b9\u6cd5\u53ea\u80fd\u88ab\u5b83\u7684\u5b50\u7c7b\u91cd\u5199\u3002<br \/> \u58f0\u660e\u4e3afinal\u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\u3002<br \/> \u58f0\u660e\u4e3astatic\u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\uff0c\u4f46\u662f\u80fd\u591f\u88ab\u518d\u6b21\u58f0\u660e\u3002<br \/> \u5b50\u7c7b\u548c\u7236\u7c7b\u5728\u540c\u4e00\u4e2a\u5305\u4e2d\uff0c\u90a3\u4e48\u5b50\u7c7b\u53ef\u4ee5\u91cd\u5199\u7236\u7c7b\u6240\u6709\u65b9\u6cd5\uff0c\u9664\u4e86\u58f0\u660e\u4e3aprivate\u548cfinal\u7684\u65b9\u6cd5\u3002<br \/> \u5b50\u7c7b\u548c\u7236\u7c7b\u4e0d\u5728\u540c\u4e00\u4e2a\u5305\u4e2d\uff0c\u90a3\u4e48\u5b50\u7c7b\u53ea\u80fd\u591f\u91cd\u5199\u7236\u7c7b\u7684\u58f0\u660e\u4e3apublic\u548cprotected\u7684\u975efinal\u65b9\u6cd5\u3002<br \/> \u91cd\u5199\u7684\u65b9\u6cd5\u80fd\u591f\u629b\u51fa\u4efb\u4f55\u975e\u5f3a\u5236\u5f02\u5e38\uff0c\u65e0\u8bba\u88ab\u91cd\u5199\u7684\u65b9\u6cd5\u662f\u5426\u629b\u51fa\u5f02\u5e38\u3002\u4f46\u662f\uff0c\u91cd\u5199\u7684\u65b9\u6cd5\u4e0d\u80fd\u629b\u51fa\u65b0\u7684\u5f3a\u5236\u6027\u5f02\u5e38\uff0c\u6216\u8005\u6bd4\u88ab\u91cd\u5199\u65b9\u6cd5\u58f0\u660e\u7684\u66f4\u5e7f\u6cdb\u7684\u5f3a\u5236\u6027\u5f02\u5e38\uff0c\u53cd\u4e4b\u5219\u53ef\u4ee5\u3002<br \/> \u6784\u9020\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\u3002<br \/> \u5982\u679c\u4e0d\u80fd\u7ee7\u627f\u4e00\u4e2a\u65b9\u6cd5\uff0c\u5219\u4e0d\u80fd\u91cd\u5199\u8fd9\u4e2a\u65b9\u6cd5\u3002<\/p>\n<h1>2\u3001\u65b9\u6cd5\u91cd\u8f7d\uff08Overload\uff09<\/h1>\n<h3>\u6982\u5ff5\uff1a<\/h3>\n<p>\u91cd\u8f7d(overloading) \u662f\u5728\u4e00\u4e2a\u7c7b\u91cc\u9762\uff0c\u65b9\u6cd5\u540d\u5b57\u76f8\u540c\uff0c\u800c\u53c2\u6570\u4e0d\u540c\u3002\u8fd4\u56de\u7c7b\u578b\u53ef\u4ee5\u76f8\u540c\u4e5f\u53ef\u4ee5\u4e0d\u540c\u3002<\/p>\n<h3>\u6ce8\u610f<\/h3>\n<p>\u6bcf\u4e2a\u91cd\u8f7d\u7684\u65b9\u6cd5\uff08\u6216\u8005\u6784\u9020\u51fd\u6570\uff09\u90fd\u5fc5\u987b\u6709\u4e00\u4e2a\u72ec\u4e00\u65e0\u4e8c\u7684\u53c2\u6570\u7c7b\u578b\u5217\u8868\u3002<\/p>\n<p>\u6700\u5e38\u7528\u7684\u5730\u65b9\u5c31\u662f\u6784\u9020\u5668\u7684\u91cd\u8f7d\u3002<\/p>\n<h3>\u91cd\u8f7d\u89c4\u5219\uff1a<\/h3>\n<p>\u88ab\u91cd\u8f7d\u7684\u65b9\u6cd5\u5fc5\u987b\u6539\u53d8\u53c2\u6570\u5217\u8868(\u53c2\u6570\u4e2a\u6570\u6216\u7c7b\u578b\u6216\u987a\u5e8f\u4e0d\u4e00\u6837)\uff1b<br \/> \u88ab\u91cd\u8f7d\u7684\u65b9\u6cd5\u53ef\u4ee5\u6539\u53d8\u8fd4\u56de\u7c7b\u578b\uff1b<br \/> \u88ab\u91cd\u8f7d\u7684\u65b9\u6cd5\u53ef\u4ee5\u6539\u53d8\u8bbf\u95ee\u4fee\u9970\u7b26\uff1b<br \/> \u88ab\u91cd\u8f7d\u7684\u65b9\u6cd5\u53ef\u4ee5\u58f0\u660e\u65b0\u7684\u6216\u66f4\u5e7f\u7684\u68c0\u67e5\u5f02\u5e38\uff1b<br \/> \u65b9\u6cd5\u80fd\u591f\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\u6216\u8005\u5728\u4e00\u4e2a\u5b50\u7c7b\u4e2d\u88ab\u91cd\u8f7d\u3002<br \/> \u65e0\u6cd5\u4ee5\u8fd4\u56de\u503c\u7c7b\u578b\u4f5c\u4e3a\u91cd\u8f7d\u51fd\u6570\u7684\u533a\u5206\u6807\u51c6\u3002<\/p>\n<h1>3\u3001\u91cd\u5199\u4e0e\u91cd\u8f7d\u76f4\u63a5\u7684\u533a\u522b<\/h1>\n<table>\n<thead>\n<tr>\n<th>\u533a\u522b\u70b9<\/th>\n<th>\u91cd\u8f7d\u65b9\u6cd5<\/th>\n<th>\u91cd\u5199\u65b9\u6cd5<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u53c2\u6570\u5217\u8868<\/td>\n<td>\u5fc5\u987b\u4fee\u6539<\/td>\n<td>\u4e00\u5b9a\u4e0d\u80fd\u4fee\u6539<\/td>\n<\/tr>\n<tr>\n<td>\u8fd4\u56de\u7c7b\u578b<\/td>\n<td>\u53ef\u4ee5\u4fee\u6539<\/td>\n<td>\u4e00\u5b9a\u4e0d\u80fd\u4fee\u6539<\/td>\n<\/tr>\n<tr>\n<td>\u5f02\u5e38<\/td>\n<td>\u53ef\u4ee5\u4fee\u6539<\/td>\n<td>\u53ef\u4ee5\u51cf\u5c11\u6216\u5220\u9664\uff0c\u4e00\u5b9a\u4e0d\u80fd\u629b\u51fa\u65b0\u7684\u6216\u8005\u66f4\u5e7f\u7684\u5f02\u5e38<\/td>\n<\/tr>\n<tr>\n<td>\u8bbf\u95ee<\/td>\n<td>\u53ef\u4ee5\u4fee\u6539<\/td>\n<td>\u4e00\u5b9a\u4e0d\u80fd\u505a\u51fa\u66f4\u4e25\u683c\u7684\u9650\u5236\uff08\u53ef\u4ee5\u964d\u4f4e\u9650\u5236\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h1>4\u3001\u7b80\u660e\u4e86\u89e3<\/h1>\n<p>\u91cd\u8f7d\u53cd\u6620\u7684\u662f\"\u968f\u673a\u5e94\u53d8\". \u540c\u6837\u4e00\u9879\u529f\u80fd, \u6839\u636e\u6570\u636e\u7c7b\u578b\u7684\u4e0d\u540c, \u91c7\u7528\u4e0d\u540c\u7684\u5904\u7406\u65b9\u5f0f. \u6bd4\u5982, \u540c\u6837\u662f\u5403\u996d, \u53bb\u9ad8\u6863\u9910\u5385\u5403\u897f\u9910, \u4f60\u4f1a\u897f\u88c5\u9769\u5c65, \u4f46\u662f\u53bb\u5403\u706b\u9505, \u7a7f\u4fbf\u88c5\u5c31\u6bd4\u8f83\u5408\u9002.<br \/> \u91cd\u5199\u53cd\u6620\u7684\u662f\"\u7236\u5b50\u5dee\u5f02\". \u4f60\"\u7ee7\u627f\"\u4e86\u7236\u4eb2\u5403\u706b\u9505\u7684\u7231\u597d, \u4f46\u662f\u5403\u540c\u4e00\u4efd\u9e33\u9e2f\u9505(\u6ce8\u610f, \u6570\u636e\u7c7b\u578b\u76f8\u540c) , \u4f60\u559c\u6b22\u6dae\u7ea2\u6c64, \u4f60\u7236\u4eb2\u559c\u6b22\u6dae\u6e05\u6c64<\/p>\n<h1>5\u3001\u603b\u7ed3\uff08\u786c\uff09<\/h1>\n<p>\u65b9\u6cd5\u7684\u91cd\u5199(Overriding)\u548c\u91cd\u8f7d(Overloading)\u662fjava\u591a\u6001\u6027\u7684\u4e0d\u540c\u8868\u73b0\uff0c\u91cd\u5199\u662f\u7236\u7c7b\u4e0e\u5b50\u7c7b\u4e4b\u95f4\u591a\u6001\u6027\u7684\u4e00\u79cd\u8868\u73b0\uff0c\u91cd\u8f7d\u53ef\u4ee5\u7406\u89e3\u6210\u591a\u6001\u7684\u5177\u4f53\u8868\u73b0\u5f62\u5f0f\u3002<\/p>\n<p>(1)\u65b9\u6cd5\u91cd\u8f7d\u662f\u4e00\u4e2a\u7c7b\u4e2d\u5b9a\u4e49\u4e86\u591a\u4e2a\u65b9\u6cd5\u540d\u76f8\u540c,\u800c\u4ed6\u4eec\u7684\u53c2\u6570\u7684\u6570\u91cf\u4e0d\u540c\u6216\u6570\u91cf\u76f8\u540c\u800c\u7c7b\u578b\u548c\u6b21\u5e8f\u4e0d\u540c,\u5219\u79f0\u4e3a\u65b9\u6cd5\u7684\u91cd\u8f7d(Overloading)\u3002<br \/> (2)\u65b9\u6cd5\u91cd\u5199\u662f\u5728\u5b50\u7c7b\u5b58\u5728\u65b9\u6cd5\u4e0e\u7236\u7c7b\u7684\u65b9\u6cd5\u7684\u540d\u5b57\u76f8\u540c,\u800c\u4e14\u53c2\u6570\u7684\u4e2a\u6570\u4e0e\u7c7b\u578b\u4e00\u6837,\u8fd4\u56de\u503c\u4e5f\u4e00\u6837\u7684\u65b9\u6cd5,\u5c31\u79f0\u4e3a\u91cd\u5199(Overriding)\u3002<br \/> (3)\u65b9\u6cd5\u91cd\u8f7d\u662f\u4e00\u4e2a\u7c7b\u7684\u591a\u6001\u6027\u8868\u73b0,\u800c\u65b9\u6cd5\u91cd\u5199\u662f\u5b50\u7c7b\u4e0e\u7236\u7c7b\u7684\u4e00\u79cd\u591a\u6001\u6027\u8868\u73b0\u3002<\/p>\n<h1>6\u3001\u56fe\u89e3<\/h1>\n<p><img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/ba8bbcdc47d246c7bfa77c33e6b06661.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"\u65b9\u6cd5\u91cd\u5199\u4e0e\u65b9\u6cd5\u91cd\u8f7d\u7684\u533a\u522b\u8be6\u89e3 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c1\u5f20\" title=\"\u65b9\u6cd5\u91cd\u5199\u4e0e\u65b9\u6cd5\u91cd\u8f7d\u7684\u533a\u522b\u8be6\u89e3 \u6280\u672f\u535a\u5ba2 \u7b2c1\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/common_img\/4cd55b32ca5b4d39b54b441edc94ace0.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"\u65b9\u6cd5\u91cd\u5199\u4e0e\u65b9\u6cd5\u91cd\u8f7d\u7684\u533a\u522b\u8be6\u89e3 (https:\/\/mushiming.com\/) \u6280\u672f\u535a\u5ba2 \u7b2c2\u5f20\" title=\"\u65b9\u6cd5\u91cd\u5199\u4e0e\u65b9\u6cd5\u91cd\u8f7d\u7684\u533a\u522b\u8be6\u89e3 \u6280\u672f\u535a\u5ba2 \u7b2c2\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" 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