{"id":3585,"date":"2026-03-27T11:48:48","date_gmt":"2026-03-27T03:48:48","guid":{"rendered":"https:\/\/www.go2posts.com\/tw\/deep-dive-package-visibility-rules\/"},"modified":"2026-03-27T11:48:48","modified_gmt":"2026-03-27T03:48:48","slug":"deep-dive-package-visibility-rules","status":"publish","type":"post","link":"https:\/\/www.go2posts.com\/tw\/deep-dive-package-visibility-rules\/","title":{"rendered":"\u6df1\u5165\u63a2\u8a0e\u5957\u4ef6\u53ef\u898b\u6027\uff1a\u79c1\u6709\u3001\u516c\u958b\u8207\u4fdd\u8b77\u898f\u5247"},"content":{"rendered":"<p>\u5728\u8907\u96dc\u7684\u8edf\u9ad4\u67b6\u69cb\u4e2d\uff0c\u7ba1\u7406\u7d44\u4ef6\u4e4b\u9593\u7684\u4e92\u52d5\u65b9\u5f0f\u8207\u7a0b\u5f0f\u78bc\u672c\u8eab\u4e00\u6a23\u91cd\u8981\u3002\u5957\u4ef6\u53ef\u898b\u6027\u5b9a\u7fa9\u4e86\u7cfb\u7d71\u5167\u4e0d\u540c\u6a21\u7d44\u4e4b\u9593\u5b58\u53d6\u7684\u754c\u9650\u3002\u7576\u60a8\u5efa\u7acb\u5957\u4ef6\u5716\u6642\uff0c\u4e26\u975e\u50c5\u50c5\u756b\u51fa\u65b9\u6846\uff1b\u60a8\u5be6\u969b\u4e0a\u662f\u5728\u5b9a\u7fa9\u5718\u968a\u3001\u5c64\u7d1a\u8207\u5b50\u7cfb\u7d71\u4e4b\u9593\u4e92\u52d5\u7684\u5408\u7d04\u3002\u7406\u89e3\u9019\u4e9b\u898f\u5247<strong>\u5957\u4ef6\u53ef\u898b\u6027<\/strong>\u53ef\u78ba\u4fdd\u60a8\u7684\u7cfb\u7d71\u5728\u9577\u6642\u9593\u5167\u4fdd\u6301\u53ef\u7dad\u8b77\u6027\u3001\u5b89\u5168\u6027\u8207\u53ef\u64f4\u5c55\u6027\u3002<\/p>\n<p>\u672c\u6307\u5357\u63a2\u8a0e\u53ef\u898b\u6027\u7684\u4e09\u7a2e\u4e3b\u8981\u72c0\u614b\uff1a<strong>\u79c1\u6709<\/strong>, 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src=\"https:\/\/www.go2posts.com\/wp-content\/uploads\/2026\/03\/package-visibility-private-public-protected-infographic.jpg\"\/><\/figure>\n<\/div>\n<h2>\ud83c\udfd7\ufe0f 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\u4fdd\u8b77\u6027\u53ef\u898b\u6027\uff1a\u534a\u958b\u653e\u4e4b\u9580<\/h2>\n<p>\u4fdd\u8b77\u6027\u53ef\u898b\u6027\u4ecb\u65bc\u516c\u958b\u8207\u79c1\u6709\u4e4b\u9593\u3002\u5b83\u5141\u8a31\u5305\u672c\u8eab\u4ee5\u53ca\u88ab\u8996\u70ba\u540c\u4e00\u5b50\u7cfb\u7d71\u6216\u5bb6\u65cf\u4e00\u90e8\u5206\u7684\u5176\u4ed6\u5305\u9032\u884c\u5b58\u53d6\u3002\u9019\u5728\u5c64\u6b21\u67b6\u69cb\u4e2d\u7d93\u5e38\u4f7f\u7528\uff0c\u5176\u4e2d\u7236\u5305\u5b9a\u7fa9\u898f\u5247\uff0c\u5b50\u5305\u9075\u5faa\u9019\u4e9b\u898f\u5247\u3002<\/p>\n<h3>\u4f55\u6642\u4f7f\u7528\u4fdd\u8b77\u6027\u53ef\u898b\u6027<\/h3>\n<p>\u4fdd\u8b77\u6027\u53ef\u898b\u6027\u975e\u5e38\u9069\u5408\u7528\u65bc\u64f4\u5c55\u9ede\u3002\u5b83\u5141\u8a31\u60a8\u8207\u53d7\u4fe1\u4efb\u7684\u5b50\u6a21\u7d44\u5171\u4eab\u908f\u8f2f\uff0c\u800c\u7121\u9700\u5c07\u9019\u4e9b\u908f\u8f2f\u66b4\u9732\u7d66\u6574\u500b\u7cfb\u7d71\u3002<\/p>\n<ul>\n<li><strong>\u5b50\u5305\uff1a<\/strong> \u5982\u679c\u4e00\u500b\u5305\u5305\u542b\u5b50\u5305\uff0c\u4fdd\u8b77\u6027\u53ef\u898b\u6027\u5141\u8a31\u5b83\u5011\u5171\u4eab\u5167\u90e8\u5de5\u5177\u3002<\/li>\n<li><strong>\u5916\u639b\u7cfb\u7d71\uff1a<\/strong> \u5982\u679c\u60a8\u6709\u5916\u639b\u67b6\u69cb\uff0c\u4fdd\u8b77\u6027\u53ef\u898b\u6027\u53ef\u8b93\u5916\u639b\u5b58\u53d6\u6838\u5fc3\u6a5f\u5236\uff0c\u800c\u7121\u9700\u5c07\u5176\u516c\u958b\u3002<\/li>\n<li><strong>\u7e7c\u627f\u6a21\u5f0f\uff1a<\/strong> \u5728\u67d0\u4e9b\u5efa\u6a21\u60c5\u5883\u4e2d\uff0c\u4fdd\u8b77\u6027\u53ef\u898b\u6027\u6a21\u64ec\u7e7c\u627f\u884c\u70ba\uff0c\u5176\u4e2d\u884d\u751f\u985e\u5225\u53ef\u5b58\u53d6\u57fa\u5e95\u985e\u5225\u7684\u5167\u90e8\u5167\u5bb9\u3002<\/li>\n<\/ul>\n<h3>\u4fdd\u8b77\u6027\u53ef\u898b\u6027\u7684\u8003\u91cf<\/h3>\n<p>\u4fdd\u8b77\u6027\u53ef\u898b\u6027\u9700\u8981\u660e\u78ba\u5b9a\u7fa9\u4f55\u8b02\u300c\u5bb6\u65cf\u300d\u6216\u300c\u5b50\u7cfb\u7d71\u300d\u3002\u6b64\u8655\u7684\u6a21\u7cca\u6027\u53ef\u80fd\u5c0e\u81f4\u5c0d\u8ab0\u80fd\u5b58\u53d6\u4f55\u7269\u7522\u751f\u6df7\u6dc6\u3002\u660e\u78ba\u8a18\u9304\u5c64\u7d1a\u7d50\u69cb\u81f3\u95dc\u91cd\u8981\uff0c\u4ee5\u78ba\u4fdd\u958b\u767c\u4eba\u54e1\u7406\u89e3\u4fdd\u8b77\u5143\u7d20\u7684\u7bc4\u570d\u3002<\/p>\n<p>\u53ef\u80fd\u7684\u6311\u6230\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u7bc4\u570d\u6df7\u6dc6\uff1a<\/strong> \u958b\u767c\u4eba\u54e1\u53ef\u80fd\u8aa4\u4ee5\u70ba\u4fdd\u8b77\u5143\u7d20\u662f\u79c1\u6709\u7684\uff0c\u53cd\u4e4b\u4ea6\u7136\u3002<\/li>\n<li><strong>\u9593\u63a5\u8026\u5408\uff1a<\/strong> \u5b50\u5305\u53ef\u80fd\u8207\u7236\u5305\u7684\u5167\u90e8\u7d50\u69cb\u7dca\u5bc6\u8026\u5408\u3002<\/li>\n<li><strong>\u6e2c\u8a66\u8907\u96dc\u5ea6\uff1a<\/strong> \u6e2c\u8a66\u4fdd\u8b77\u5143\u7d20\u901a\u5e38\u9700\u8981\u7279\u5b9a\u7684\u5b58\u53d6\u8a2d\u5b9a\uff0c\u9019\u662f\u516c\u958b\u5143\u7d20\u6240\u4e0d\u9700\u8981\u7684\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udcca \u53ef\u898b\u6027\u898f\u5247\u6bd4\u8f03<\/h2>\n<p>\u5c07\u5dee\u7570\u4e26\u5217\u6bd4\u8f03\u66f4\u5bb9\u6613\u7406\u89e3\u3002\u4e0b\u8868\u7e3d\u7d50\u4e86\u5b58\u53d6\u5c64\u7d1a\u3001\u5178\u578b\u4f7f\u7528\u60c5\u5883\u4ee5\u53ca\u5c0d\u7cfb\u7d71\u7684\u5f71\u97ff\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u53ef\u898b\u6027\u5c64\u7d1a<\/th>\n<th>\u5b58\u53d6\u7bc4\u570d<\/th>\n<th>\u4e3b\u8981\u4f7f\u7528\u60c5\u5883<\/th>\n<th>\u5c0d\u8026\u5408\u7684\u5f71\u97ff<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u516c\u958b<\/strong> \ud83d\udd13<\/td>\n<td>\u7cfb\u7d71\u4e2d\u7684\u4efb\u4f55\u5957\u4ef6<\/td>\n<td>\u7a69\u5b9a\u7684 API\u3001\u5165\u53e3\u9ede<\/td>\n<td>\u589e\u52a0\u9ad8\u8026\u5408\u7684\u98a8\u96aa<\/td>\n<\/tr>\n<tr>\n<td><strong>\u79c1\u6709<\/strong> \ud83d\udd12<\/td>\n<td>\u50c5\u5957\u4ef6\u672c\u8eab<\/td>\n<td>\u5be6\u4f5c\u7d30\u7bc0\u3001\u8f14\u52a9\u5de5\u5177<\/td>\n<td>\u964d\u4f4e\u8026\u5408\uff0c\u63d0\u5347\u5c01\u88dd\u6027<\/td>\n<\/tr>\n<tr>\n<td><strong>\u53d7\u4fdd\u8b77<\/strong> \ud83d\udee1\ufe0f<\/td>\n<td>\u5957\u4ef6\u8207\u5b50\u5957\u4ef6<\/td>\n<td>\u64f4\u5c55\u9ede\u3001\u5167\u90e8\u5171\u4eab<\/td>\n<td>\u968e\u5c64\u5167\u7684\u5e73\u8861\u8026\u5408<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\udee0\ufe0f \u5be6\u4f5c\u7684\u6700\u4f73\u5be6\u52d9<\/h2>\n<p>\u6b63\u78ba\u61c9\u7528\u53ef\u898b\u6027\u898f\u5247\u9700\u8981\u7d00\u5f8b\u3002\u50c5\u4e86\u89e3\u5b9a\u7fa9\u662f\u4e0d\u5920\u7684\uff1b\u4f60\u5fc5\u9808\u5728\u8a2d\u8a08\u8207\u958b\u767c\u7684\u6574\u500b\u751f\u547d\u9031\u671f\u4e2d\u4e00\u81f4\u5730\u61c9\u7528\u9019\u4e9b\u898f\u5247\u3002<\/p>\n<h3>1. \u9810\u8a2d\u70ba\u79c1\u6709<\/h3>\n<p>\u63a1\u53d6\u4e00\u7a2e\u9810\u8a2d\u9650\u5236\u53ef\u898b\u6027\u7684\u601d\u7dad\u6a21\u5f0f\u3002\u50c5\u516c\u958b\u7d55\u5c0d\u5fc5\u8981\u7684\u5167\u5bb9\u3002\u9019\u80fd\u6700\u5c0f\u5316\u7cfb\u7d71\u7684\u66b4\u9732\u9762\uff0c\u4e26\u964d\u4f4e\u610f\u5916\u4f9d\u8cf4\u7684\u6a5f\u7387\u3002<\/p>\n<h3>2. \u5b9a\u7fa9\u660e\u78ba\u7684\u754c\u7dda<\/h3>\n<p>\u78ba\u4fdd\u5957\u4ef6\u754c\u7dda\u8207\u908f\u8f2f\u9818\u57df\u754c\u7dda\u4e00\u81f4\u3002\u82e5\u4e00\u500b\u5957\u4ef6\u5305\u542b\u5169\u500b\u4e0d\u540c\u7684\u6982\u5ff5\uff0c\u61c9\u5c07\u5176\u62c6\u5206\u3002\u9019\u80fd\u4f7f\u53ef\u898b\u6027\u898f\u5247\u66f4\u5177\u610f\u7fa9\uff0c\u4e5f\u66f4\u5bb9\u6613\u7ba1\u7406\u3002<\/p>\n<h3>3. \u6587\u4ef6\u5316\u5408\u7d04<\/h3>\n<p>\u5c0d\u65bc\u516c\u958b\u5143\u7d20\uff0c\u6587\u4ef6\u662f\u5f37\u5236\u6027\u7684\u3002\u4f7f\u7528\u8005\u9700\u8981\u77e5\u9053\u5982\u4f55\u4f7f\u7528\u4ecb\u9762\u3002\u5c0d\u65bc\u53d7\u4fdd\u8b77\u7684\u5143\u7d20\uff0c\u5167\u90e8\u6587\u4ef6\u61c9\u8aaa\u660e\u5c64\u7d1a\u7d50\u69cb\u8207\u4f7f\u7528\u898f\u5247\u3002<\/p>\n<h3>4. \u6aa2\u67e5\u4f9d\u8cf4\u95dc\u4fc2<\/h3>\n<p>\u5b9a\u671f\u5be9\u67e5\u4f9d\u8cf4\u5716\u3002\u5c0b\u627e\u90a3\u4e9b\u4f9d\u8cf4\u5176\u4ed6\u5957\u4ef6\u5167\u90e8\u985e\u5225\u7684\u5957\u4ef6\u3002\u9019\u901a\u5e38\u8868\u793a\u5b58\u5728\u53ef\u898b\u6027\u9055\u898f\uff0c\u61c9\u4e88\u4ee5\u4fee\u6b63\u3002<\/p>\n<h2>\u26a0\ufe0f \u61c9\u907f\u514d\u7684\u5e38\u898b\u9677\u9631<\/h2>\n<p>\u5373\u4f7f\u7d93\u9a57\u8c50\u5bcc\u7684\u67b6\u69cb\u5e2b\u4e5f\u53ef\u80fd\u5728\u53ef\u898b\u6027\u4e0a\u72af\u932f\u3002\u53ca\u65e9\u8b58\u5225\u9019\u4e9b\u9677\u9631\uff0c\u80fd\u5927\u5e45\u6e1b\u5c11\u6280\u8853\u8ca0\u50b5\u3002<\/p>\n<ul>\n<li><strong>\u904e\u5ea6\u516c\u958b\u4ecb\u9762\uff1a<\/strong>\u5efa\u7acb\u904e\u65bc\u7d30\u7c92\u5ea6\u7684\u516c\u958b API\u3002\u5c07\u529f\u80fd\u6574\u5408\u6210\u4e00\u81f4\u7684\u55ae\u5143\uff0c\u6bd4\u516c\u958b\u6bcf\u4e00\u9805\u5c0f\u529f\u80fd\u66f4\u4f73\u3002<\/li>\n<li><strong>\u5ffd\u7565\u53d7\u4fdd\u8b77\u7d30\u7bc0\uff1a<\/strong> \u5047\u8a2d\u53d7\u4fdd\u8b77\u5b58\u53d6\u5728\u6240\u6709\u5efa\u6a21\u60c5\u5883\u4e2d\u904b\u4f5c\u65b9\u5f0f\u76f8\u540c\u3002\u67d0\u4e9b\u74b0\u5883\u5c0d\u53d7\u4fdd\u8b77\u7684\u8655\u7406\u65b9\u5f0f\u8207\u5176\u4ed6\u74b0\u5883\u4e0d\u540c\u3002<\/li>\n<li><strong>\u975c\u614b\u5b58\u53d6\uff1a<\/strong> \u4f7f\u7528\u7e5e\u904e\u53ef\u898b\u6027\u898f\u5247\u7684\u975c\u614b\u65b9\u6cd5\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u96e3\u4ee5\u8ffd\u8e64\u7684\u96b1\u85cf\u4f9d\u8cf4\u3002<\/li>\n<li><strong>\u5faa\u74b0\u4f9d\u8cf4\uff1a<\/strong> \u53ef\u898b\u6027\u898f\u5247\u7121\u6cd5\u9632\u6b62\u5faa\u74b0\u4f9d\u8cf4\u3002\u5169\u500b\u5957\u4ef6\u53ef\u4ee5\u4e92\u76f8\u516c\u958b\uff0c\u4f46\u4ecd\u6703\u5f62\u6210\u7834\u58de\u7de8\u8b6f\u6216\u57f7\u884c\u7684\u5faa\u74b0\u3002<\/li>\n<\/ul>\n<h2>\ud83d\udd04 \u5c0d\u7dad\u8b77\u8207\u53ef\u64f4\u5c55\u6027\u7684\u5f71\u97ff<\/h2>\n<p>\u53ef\u898b\u6027\u898f\u5247\u7684\u9078\u64c7\u76f4\u63a5\u5f71\u97ff\u7cfb\u7d71\u7dad\u8b77\u8207\u64f4\u5c55\u7684\u96e3\u6613\u7a0b\u5ea6\u3002\u4e00\u500b\u7d50\u69cb\u826f\u597d\u7684\u53ef\u898b\u6027\u6a21\u578b\uff0c\u8b93\u5718\u968a\u80fd\u5920\u4e26\u884c\u5de5\u4f5c\u800c\u4e0d\u6703\u4e92\u76f8\u5e72\u64fe\u3002<\/p>\n<h3>\u7dad\u8b77<\/h3>\n<p>\u7576\u53ef\u898b\u6027\u7ba1\u7406\u5f97\u7576\u6642\uff0c\u91cd\u69cb\u4fbf\u6210\u70ba\u5c40\u90e8\u6027\u4efb\u52d9\u3002\u60a8\u53ef\u4ee5\u5728\u4e0d\u64d4\u5fc3\u7834\u58de\u7cfb\u7d71\u5176\u4ed6\u90e8\u5206\u7684\u60c5\u6cc1\u4e0b\uff0c\u66f4\u6539\u5957\u4ef6\u7684\u5167\u90e8\u7d50\u69cb\u3002\u9019\u964d\u4f4e\u4e86\u8b8a\u66f4\u6210\u672c\uff0c\u4e26\u63d0\u5347\u4e86\u958b\u767c\u901f\u5ea6\u3002<\/p>\n<h3>\u53ef\u64f4\u5c55\u6027<\/h3>\n<p>\u96a8\u8457\u7cfb\u7d71\u64f4\u5c55\uff0c\u5957\u4ef6\u6578\u91cf\u589e\u52a0\u3002\u82e5\u7f3a\u4e4f\u56b4\u683c\u7684\u53ef\u898b\u6027\u898f\u5247\uff0c\u4e92\u52d5\u7684\u8907\u96dc\u5ea6\u5c07\u5448\u6307\u6578\u589e\u9577\u3002\u900f\u904e\u9650\u5236\u5b58\u53d6\uff0c\u60a8\u53ef\u4ee5\u63a7\u5236\u8907\u96dc\u5ea6\u66f2\u7dda\u3002\u9019\u4f7f\u5f97\u65b0\u958b\u767c\u4eba\u54e1\u66f4\u5bb9\u6613\u4e0a\u624b\uff0c\u56e0\u70ba\u516c\u958b\u4ecb\u9762\u6210\u70ba\u4e3b\u8981\u7684\u771f\u5be6\u4f86\u6e90\u3002<\/p>\n<h3>\u5718\u968a\u7d50\u69cb\u5c0d\u9f4a<\/h3>\n<p>\u53ef\u898b\u6027\u898f\u5247\u53ef\u4ee5\u53cd\u6620\u5718\u968a\u908a\u754c\u3002\u5982\u679c\u60a8\u6709\u4e00\u500b\u8ca0\u8cac\u7279\u5b9a\u5957\u4ef6\u7684\u5718\u968a\uff0c\u8a72\u5957\u4ef6\u61c9\u50c5\u516c\u958b\u8a72\u5718\u968a\u5e0c\u671b\u4ed6\u4eba\u4f7f\u7528\u7684\u5167\u5bb9\u3002\u9019\u4f7f\u6280\u8853\u67b6\u69cb\u8207\u7d44\u7e54\u7d50\u69cb\u5c0d\u9f4a\uff0c\u9019\u6982\u5ff5\u5e38\u88ab\u7a31\u70ba\u5eb7\u5a01\u5b9a\u5f8b\u3002<\/p>\n<h2>\ud83d\ude80 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