HTML 5\u6807\u51c6\u5e76\u4e0d\u53ea\u5c40\u9650\u4e8e\u4f20\u7edf\u7684\u6807\u8bb0\u8bed\u8a00\uff0c\u5b83\u8fd8\u62e5\u6709\u5f88\u591a\u8ba9\u4eba\u671f\u5f85\u7684API\u63a5\u53e3\uff0c\u5229\u7528\u8fd9\u4e9b\u63a5\u53e3\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u521b\u5efa\u66f4\u52a0\u4e30\u5bcc\u3001\u66f4\u52a0\u5f15\u4eba\u6ce8\u76ee\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u4e4b\u524d\u6211\u4eec\u4ecb\u7ecd\u8fc7\u652f\u6301\u6587\u4ef6\u62d6\u653e\u4e0a\u4f20\u529f\u80fd\u7684HTML 5 File API\uff0c\u4eca\u5929\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u4e86\u89e3HTML 5\u7684Web SQL Database API\uff0c\u4f7f\u7528\u672c\u5730\u548c\u4f1a\u8bdd\u5b58\u50a8\u5b9e\u73b0\u7b80\u5355\u7684\u5bf9\u8c61\u6301\u4e45\u5316\u3002<\/p>\n
\u3000\u3000\u5bf9\u4e8eHTML 5\uff0c\u4e5f\u8bb8\u6700\u4e3a\u6709\u7528\u7684\u5c31\u662f\u5b83\u65b0\u63a8\u51fa\u7684“Web Storage”(Web \u5b58\u50a8)API\u3002\u5bf9\u7b80\u5355\u7684\u5173\u952e\u503c\u5bf9(\u6bd4\u5982\u5e94\u7528\u7a0b\u5e8f\u8bbe\u7f6e)\u6216\u7b80\u5355\u5bf9\u8c61(\u5982\u5e94\u7528\u7a0b\u5e8f\u72b6\u6001)\u8fdb\u884c\u5b58\u50a8\uff0c\u4f7f\u7528\u672c\u5730\u548c\u4f1a\u8bdd\u5b58\u50a8\u80fd\u591f\u5f88\u597d\u5730\u5b8c\u6210\uff0c\u4f46\u662f\u5728\u5bf9\u7410\u788e\u7684\u5173\u7cfb\u6570\u636e\u8fdb\u884c\u5904\u7406\u4e4b\u5916\uff0c\u5b83\u5c31\u529b\u6240\u4e0d\u53ca\u4e86\u3002\u800c\u8fd9\u6b63\u662f HTML 5 \u7684“Web SQL Database”API \u63a5\u53e3\u7684\u5e94\u7528\u6240\u5728\u3002<\/p>\n
\u8fd1\u65e5Google\u5ba3\u5e03\u5c06\u652f\u6301HTML 5 Web SQL Database API\uff0c\u5176\u4ed6\u6d4f\u89c8\u5668\u5382\u5546\u4e5f\u8868\u793a\u5c06\u7d27\u968f\u5176\u540e\u63d0\u4f9b\u8be5\u652f\u6301\uff0c\u6709\u7684\u751a\u81f3\u5df2\u7ecf\u5f00\u59cb\u652f\u6301\u8be5API\u4e86\uff1b\u4f46\u540c\u65f6\uff0cHTML 5\u89c4\u8303\u7684\u5236\u8ba2\u5374\u9047\u5230\u4e86\u963b\u788d\uff0c\u56e0\u4e3a\u6240\u6709\u7684\u53c2\u4e0e\u8005\u90fd\u5df2\u9009\u62e9\u4e86SQLite\u4f5c\u4e3a\u5e95\u5c42\u6570\u636e\u5e93\uff0c\u8981\u60f3\u5b9e\u73b0\u6807\u51c6\u5316\u8fd8\u5f97\u8003\u8651\u591a\u4e2a\u4e0d\u540c\u7684\u5b9e\u73b0\u3002<\/p>\n
\u4f5c\u4e3aHTML 5\u7684\u4e00\u90e8\u5206\uff0cW3C\u7ec4\u7ec7\u6b63\u5728\u5236\u8ba2Web SQL Database API\u8349\u6848\uff0c\u8be5\u89c4\u8303\u4e3b\u8981\u7528\u4e8e\u89e3\u51b3\u5982\u4f55\u901a\u8fc7SQL\u5b58\u50a8\u53ca\u8bbf\u95ee\u6570\u636e\u7684\u95ee\u9898\u3002\u6587\u6863\u4e2d\u6240\u4f7f\u7528\u7684SQL\u8bed\u8a00\u662fSQLite 3.6.19\u3002\u7f51\u9875\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2aAPI\u4e0e\u5d4c\u5165\u5f0f\u7684\u5ba2\u6237\u7aef\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\uff0c\u8fd9\u5bf9\u4e8e\u90a3\u4e9b\u60f3\u8981\u5728\u672c\u5730\u5b58\u50a8\u6570\u636e\u6216\u662f\u79bb\u7ebf\u6d4f\u89c8\u7684\u5e94\u7528\u6765\u8bf4\u4ef7\u503c\u975e\u5e38\u5927\u3002<\/p>\n
Google\u5df2\u7ecf\u5728\u5176\u6700\u65b0\u7684\u6d4f\u89c8\u5668Chrome 4\u4e2d\u901a\u8fc7SQLite\u63d0\u4f9b\u5bf9Web SQL Database\u7684\u652f\u6301\u4e86\uff0c\u8fd9\u4e2a\u4e3e\u52a8\u53ef\u4ee5\u770b\u4f5c\u662f\u5411\u6807\u51c6\u5316\u8fc8\u8fdb\u7684\u4e00\u5927\u6b65\uff0c\u56e0\u4e3aGoogle Gears\u4e2d\u5df2\u7ecf\u62e5\u6709\u4e86\u4e00\u4e2aDatabase API\uff0c\u4e5f\u662f\u57fa\u4e8eSQLite\u3002Gears API\u4e3a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u63d0\u4f9b\u4e86\u7ed3\u6784\u5316\u7684\u6570\u636e\u5b58\u50a8\u529f\u80fd\uff0c\u5305\u62ecIE\u3001Firefox\u4ee5\u53caSafari\uff0c\u4f46\u73b0\u5728Google\u5df2\u7ecf\u505c\u6b62Gears\u7684\u5f00\u53d1\u5de5\u4f5c\u4e86\u3002<\/p>\n
Firefox 3\u62e5\u6709\u4e00\u4e2a\u5d4c\u5165\u5f0fSQLite\u6570\u636e\u5e93\uff0c\u76ee\u524d\u4e3b\u8981\u7528\u4e8e\u5b58\u50a8\u4e66\u7b7e\u548c\u5386\u53f2\u8bb0\u5f55\uff0c\u4f46\u53ef\u80fd\u4e0d\u4e45\u540e\u5c31\u5c06\u652f\u6301Web SQL Database API\u3002\u5f53\u524d\u7684\u5f00\u53d1\u5de5\u4f5c\u6b63\u5728WebKit\uff08Safari\u6240\u7528\u7684\u6e32\u67d3\u5f15\u64ce\uff09\u4e0a\u8fdb\u884c\u4ee5\u5411Web\u5f00\u53d1\u8005\u63d0\u4f9bWeb Database API\u3002\u73b0\u5728\u8c01\u4e5f\u4e0d\u77e5\u9053\u5fae\u8f6f\u5bf9\u4e8eIE\u548cHTML 5 Database API\u7684\u8ba1\u5212\u5230\u5e95\u662f\u4ec0\u4e48\u3002<\/p>\n
\u3000\u3000\u5148\u63d0\u4e2a\u9192\uff0c\u8be5\u6587\u4e0b\u9762\u7684\u5185\u5bb9\u9700\u8981\u8bfb\u8005\u5bf9 JavaScript \u548c\u9762\u5bf9\u5bf9\u8c61\u7f16\u7a0b(\u5c24\u5176\u662f\u533f\u540d\u5185\u7684\u5185\u90e8\u51fd\u6570)\u4ee5\u53caSQL\u5177\u6709\u5f88\u597d\u7684\u7406\u89e3\u3002<\/p>\n
\u3000\u3000\u6253\u5f00\u94fe\u63a5<\/p>\n
\u3000\u3000\u4e3a\u4e86\u6253\u5f00\u4e00\u4e2a\u8fde\u63a5\uff0c\u6211\u4eec\u6267\u884c\u4ee5\u4e0b\u4ee3\u7801\uff1a
db = openDatabase("ToDo", "0.1", "A list of to do items.", 200000);<\/p>\n<\/p>\n
\u3000\u3000\u4ee5\u4e0a\u4ee3\u7801\u521b\u5efa\u4e86\u4e00\u4e2a\u6570\u636e\u5e93\u5bf9\u8c61 db\uff0c\u540d\u79f0\u662f Todo\uff0c\u7248\u672c\u7f16\u53f7\u4e3a0.1\u3002db \u8fd8\u5e26\u6709\u63cf\u8ff0\u4fe1\u606f\u548c\u5927\u6982\u7684\u5927\u5c0f\u503c\u3002\u7528\u6237\u4ee3\u7406(user agent)\u53ef\u4f7f\u7528\u8fd9\u4e2a\u63cf\u8ff0\u4e0e\u7528\u6237\u8fdb\u884c\u4ea4\u6d41\uff0c\u8bf4\u660e\u6570\u636e\u5e93\u662f\u7528\u6765\u505a\u4ec0\u4e48\u7684\u3002\u5229\u7528\u4ee3\u7801\u4e2d\u63d0\u4f9b\u7684\u5927\u5c0f\u503c\uff0c\u7528\u6237\u4ee3\u7406\u53ef\u4ee5\u4e3a\u5185\u5bb9\u7559\u51fa\u8db3\u591f\u7684\u5b58\u50a8\u3002\u5982\u679c\u9700\u8981\uff0c\u8fd9\u4e2a\u5927\u5c0f\u662f\u53ef\u4ee5\u6539\u53d8\u7684\uff0c\u6240\u4ee5\u6ca1\u6709\u5fc5\u8981\u9884\u5148\u5047\u8bbe\u5141\u8bb8\u7528\u6237\u4f7f\u7528\u591a\u5c11\u7a7a\u95f4\u3002<\/p>\n
\u3000\u3000\u4e3a\u4e86\u68c0\u6d4b\u4e4b\u524d\u521b\u5efa\u7684\u8fde\u63a5\u662f\u5426\u6210\u529f\uff0c\u4f60\u53ef\u4ee5\u68c0\u67e5\u90a3\u4e2a\u6570\u636e\u5e93\u5bf9\u8c61\u662f\u5426\u4e3anull\uff1a
if(!db) alert("Failed to connect to database.");<\/p>\n<\/p>\n
\u3000\u3000\u7edd\u4e0d\u53ef\u4ee5\u5047\u8bbe\u8be5\u8fde\u63a5\u5df2\u7ecf\u6210\u529f\u5efa\u7acb\uff0c\u5373\u4f7f\u8fc7\u53bb\u5bf9\u4e8e\u67d0\u4e2a\u7528\u6237\u5b83\u662f\u6210\u529f\u7684\u3002\u4e3a\u4ec0\u4e48\u4e00\u4e2a\u8fde\u63a5\u4f1a\u5931\u8d25\uff0c\u5b58\u5728\u591a\u4e2a\u539f\u56e0\u3002\u4e5f\u8bb8\u7528\u6237\u4ee3\u7406\u51fa\u4e8e\u5b89\u5168\u539f\u56e0\u62d2\u7edd\u4f60\u7684\u8bbf\u95ee\uff0c\u4e5f\u8bb8\u8bbe\u5907\u5b58\u50a8\u6709\u9650\u3002\u9762\u5bf9\u6d3b\u8dc3\u800c\u5feb\u901f\u8fdb\u5316\u7684\u6f5c\u5728\u7528\u6237\u4ee3\u7406\uff0c\u5bf9\u7528\u6237\u7684\u673a\u5668\u3001\u8f6f\u4ef6\u53ca\u5176\u80fd\u529b\u4f5c\u51fa\u5047\u8bbe\u662f\u975e\u5e38\u4e0d\u660e\u667a\u7684\u884c\u4e3a\u3002\u6bd4\u5982\uff0c\u5f53\u7528\u6237\u4f7f\u7528\u624b\u6301\u8bbe\u5907\u65f6\uff0c\u4ed6\u4eec\u53ef\u81ea\u7531\u5904\u7f6e\u7684\u6570\u636e\u53ef\u80fd\u53ea\u6709\u51e0\u5146\u5b57\u8282\u3002<\/p>\n
\u3000\u3000\u6267\u884c\u67e5\u8be2<\/p>\n
\u3000\u3000\u6267\u884c\u4e00\u4e2a\u67e5\u8be2\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528database.transaction()\u51fd\u6570\u3002\u8be5\u51fd\u6570\u5177\u6709\u5355\u4e00\u53c2\u6570\uff0c\u8d1f\u8d23\u67e5\u8be2\u5b9e\u9645\u6267\u884c\u7684\u51fd\u6570\u3002<\/p>\n
\u3000\u3000\u8be5\u51fd\u6570(\u901a\u5e38\u662f\u533f\u540d\u7684)\u5177\u6709\u4e00\u4e2a\u7c7b\u578b\u4e8b\u52a1\u7684\u53c2\u6570\u3002<\/p>\n
\u3000\u3000db.transaction( function(tx) { \u8be5\u4e8b\u52a1\u5177\u6709\u4e00\u4e2a\u51fd\u6570\uff1aexecuteSql\u3002\u8fd9\u4e2a\u51fd\u6570\u4f7f\u7528\u56db\u4e2a\u53c2\u6570\uff1a\u8868\u793a\u67e5\u8be2\u7684\u5b57\u7b26\u4e32\uff0c\u63d2\u5165\u5230\u67e5\u8be2\u4e2d\u95ee\u53f7\u6240\u5728\u5904\u7684\u5b57\u7b26\u4e32\u6570\u636e(\u5f88\u50cf Java \u7684\u9884\u5148\u51c6\u5907\u597d\u7684\u8bed\u53e5)\uff0c\u4e00\u4e2a\u6210\u529f\u65f6\u6267\u884c\u7684\u51fd\u6570\u548c\u4e00\u4e2a\u5931\u8d25\u65f6\u6267\u884c\u7684\u51fd\u6570\u3002
tx.executeSql("SELECT COUNT(*) FROM ToDo", [], function(result){}, function(tx, error){});<\/p>\n<\/p>\n
\u3000\u3000\u67e5\u8be2\u6210\u529f\u65f6<\/p>\n
\u3000\u3000\u5f53\u67e5\u8be2\u6210\u529f\u6267\u884c\u65f6\uff0c\u5e94\u7528\u7a0b\u5e8f\u8df3\u8f6c\u81f3\u4e00\u4e2a\u5177\u6709\u4e00\u5bf9\u53c2\u6570\u7684\u67e5\u8be2\uff0c\u4e00\u4e2a\u662f transaction\uff0c\u53e6\u4e00\u4e2a\u662f\u5b83\u641c\u96c6\u7684 results\u3002\u5bf9\u4e8e\u5b9e\u9645\u4e0a\u5c06\u4f60\u7684\u6570\u636e\u4f20\u9012\u81f3\u7528\u6237\uff0c\u8fd9\u662f\u975e\u5e38\u5b8c\u7f8e\u7684\uff0c\u6bd4\u5982\u663e\u793a ToDo \u5217\u8868\u3002\u6709\u5173\u8fd9\u4e2a\u8bdd\u9898\u540e\u9762\u518d\u8bb2\u3002<\/p>\n
\u3000\u3000\u67e5\u8be2\u5931\u8d25\u5931\u8d25\u65f6<\/p>\n
\u3000\u3000\u5f53\u67e5\u8be2\u6ca1\u80fd\u6267\u884c\u65f6\u6267\u884c\u3002\u7531\u4e8e\u4f60\u5c06 transaction \u5bf9\u8c61\u4f5c\u4e3a\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u8fdb\u884c\u4f20\u9012\uff0c\u5f53\u51fa\u73b0\u9519\u8bef\u65f6\u4f60\u53ef\u4ee5\u7ee7\u7eed\u6267\u884c\u67e5\u8be2\u3002\u4f8b\u5982\uff0c\u5982\u679c\u662f\u56e0\u4e3a\u7f3a\u5c11\u8868\u683c(table)\u800c\u67e5\u8be2\u65e0\u6cd5\u8fd0\u884c\uff0c\u8fd9\u662f\u521b\u5efa\u4e00\u4e2a\u8868\u683c\u5e76\u5728\u6b64\u6267\u884c\u8be5\u8bed\u53e5\u7684\u7edd\u4f73\u65f6\u673a\u3002\u4ece\u8be5\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c\u4f60\u53ef\u4ee5\u83b7\u5f97\u6709\u5173\u8be5\u9519\u8bef\u7684\u4fe1\u606f(\u5305\u62ec\u63cf\u8ff0)\u3002<\/p>\n
\u3000\u3000\u793a\u4f8b<\/p>\n
\u3000\u3000\u5047\u8bbe\u6211\u4eec\u60f3\u8981\u4f7f\u7528\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u60f3\u8981\u67e5\u8be2\u6570\u636e\u5e93\u4e2d\u7684\u67d0\u4e2a\u8868\u683c\uff0c\u5982\u679c\u8be5\u8868\u683c\u4e0d\u5b58\u5728\uff0c\u6211\u4eec\u5c31\u521b\u5efa\u4e00\u4e2a\u8868\u683c\u3002<\/p>\n
\u3000\u3000\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u8c03\u7528\u5177\u6709\u4e00\u4e2a\u51fd\u6570\u53c2\u6570\u7684 db.transaction()\u3002\u8fd9\u4e2a\u53c2\u6570\u4e2d\uff0c\u6211\u4eec\u8c03\u7528 tx.executeSql()\u3002\u5982\u679c\u8fd9\u4e2a\u6b65\u9aa4\u6210\u529f\uff0c\u6211\u4eec\u4e0d\u505a\u4efb\u4f55\u64cd\u4f5c(\u56e0\u6b64\u662f\u4e00\u4e2anull\u53c2\u6570)\u3002\u6216\u8005\u6211\u4eec\u5c06\u8be5\u4e8b\u52a1\u548c\u6267\u884c\u5931\u8d25\u7684\u51fd\u6570\u4e00\u8d77\u4f20\u9012\uff0c\u5e76\u518d\u6b21\u8c03\u7528 tx.executeSql()\u3002\u8fd9\u4e00\u6b21\u4f7f\u7528\u521b\u5efa\u67e5\u8be2\u3002
db.transaction( function(tx) { tx.executeSql("SELECT COUNT(*) FROM ToDo", [], null, function(tx, error) { tx.executeSql("CREATE TABLE ToDo (id REAL UNIQUE, label TEXT, timestamp REAL)", [], null, null); } ); } );<\/p>\n<\/p>\n
\u3000\u3000\u4f7f\u7528\u6240\u6709\u8fd9\u4e9b\u5185\u90e8\u65b9\u6cd5\uff0c\u53ef\u80fd\u6709\u70b9\u9ebb\u70e6\uff0c\u6240\u4ee5\u4f60\u4e5f\u8bb8\u60f3\u5728\u5916\u90e8\u521b\u5efa\u4e00\u4e2a\u8c03\u7528 db.transaction() \u7684\u51fd\u6570\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u8ba9\u9519\u8bef\u51fd\u6570\u662f\u81ea\u5305\u542b\u7684\uff0c\u5e76\u5c06\u5176\u547d\u540d\u4e3a“createToDoTable()”\u3002<\/p>\n
\u3000\u3000\u63d2\u5165<\/p>\n
\u3000\u3000\u4e3a\u4e86\u8ba9\u4ee3\u7801\u66f4\u52a0\u7b80\u6d01\u548c\u5b89\u5168\uff0cWeb SQL Database API \u5141\u8bb8\u4f60\u4e3a transaction.executeSql() \u51fd\u6570\u63d0\u4f9b\u5b57\u7b26\u4e32\u6570\u636e\uff0c\u7528\u4ee5\u8868\u793a\u8c03\u7528\u7684 SQL \u8bed\u53e5\u4e2d\u7684\u53d8\u91cf\u3002\u6211\u4eec\u4f7f\u7528\u4ee5\u4e0b\u7684\u4ee3\u7801\u8fdb\u884c\u6f14\u793a\uff1a
db.transaction( function(tx) { tx.executeSql("INSERT INTO ToDo (label, timestamp) values(?, ?)", [label, new Date().getTime()], null, null); } );<\/p>\n<\/p>\n
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INSERT INTO ToDo (label, timestamp) values ("Test", 1265925077487)<\/p>\n<\/p>\n
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db.transaction( function(tx) { tx.executeSql("SELECT * FROM ToDo", [], function(tx, result) { for(var i = 0; i < result.rows.length; i++) { document.write(” + result.rows.item(i)[‘label’] + ‘
‘); } }, null); } );<\/p>\n<\/p>\n
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