{"id":2362,"date":"2020-10-14T11:01:17","date_gmt":"2020-10-14T03:01:17","guid":{"rendered":"http:\/\/admin.evshou.com\/?p=2362"},"modified":"2020-10-15T15:42:22","modified_gmt":"2020-10-15T07:42:22","slug":"2020javaweb%e6%95%99%e7%a8%8b%e4%b9%8bjdbc","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=2362","title":{"rendered":"2020Javaweb\u6559\u7a0b\u4e4bJDBC"},"content":{"rendered":"<h3>2020Javaweb\u6559\u7a0b\u4e4bJDBC<\/h3>\n<p><strong><span style=\"color: #ff0000;\">JDBC\u7b80\u4ecb<\/span><\/strong><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">JDBC\uff08Java DataBase Connectivity,java\u6570\u636e\u5e93\u8fde\u63a5\uff09\u662f\u4e00\u79cd\u7528\u4e8e\u6267\u884cSQL\u8bed\u53e5\u7684Java API\uff0c\u53ef\u4ee5\u4e3a\u591a\u79cd\u5173\u7cfb\u6570\u636e\u5e93\u63d0\u4f9b\u7edf\u4e00\u8bbf\u95ee\uff0c\u5b83\u7531\u4e00\u7ec4\u7528Java\u8bed\u8a00\u7f16\u5199\u7684\u7c7b\u548c\u63a5\u53e3\u7ec4\u6210\u3002JDBC\u63d0\u4f9b\u4e86\u4e00\u79cd\u57fa\u51c6\uff0c\u636e\u6b64\u53ef\u4ee5\u6784\u5efa\u66f4\u9ad8\u7ea7\u7684\u5de5\u5177\u548c\u63a5\u53e3\uff0c\u4f7f\u6570\u636e\u5e93\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u7f16\u5199\u6570\u636e\u5e93\u5e94\u7528\u7a0b\u5e8f\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><!--more--><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">JDBC\u53ef\u4ee5\u5728\u5404\u79cd\u5e73\u53f0\u4e0a\u4f7f\u7528Java\uff0c\u5982Windows\uff0cMac OS\u548c\u5404\u79cd\u7248\u672c\u7684UNIX\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">JDBC\u5e93\u5305\u62ec\u901a\u5e38\u4e0e\u6570\u636e\u5e93\u4f7f\u7528\u76f8\u5173\u7684API\u3002<\/span><\/p>\n<ul class=\"ul-list\" data-mark=\"-\">\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u8fde\u63a5\u6570\u636e\u5e93\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u521b\u5efaSQL\u6216MySQL\u8bed\u53e5\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5728\u6570\u636e\u5e93\u4e2d\u6267\u884cSQL\u6216MySQL\u67e5\u8be2\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item md-focus-container\">\n<p class=\"md-end-block md-p md-focus\"><span class=\"md-plain\">\u67e5\u770b\u548c\u4fee\u6539\u751f\u6210\u7684\u8bb0\u5f55\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<p><strong><span style=\"color: #ff0000;\">JDBC\u4f53\u7cfb\u7ed3\u6784<\/span><\/strong><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">JDBC API\u652f\u6301\u7528\u4e8e\u6570\u636e\u5e93\u8bbf\u95ee\u7684\u4e24\u5c42\u548c\u4e09\u5c42\u5904\u7406\u6a21\u578b\uff0c\u4f46\u901a\u5e38\uff0cJDBC\u4f53\u7cfb\u7ed3\u6784\u7531\u4e24\u5c42\u7ec4\u6210\uff1a<\/span><\/p>\n<ul class=\"ul-list\" data-mark=\"-\">\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-pair-s \"><strong><span class=\"md-plain\">JDBC\uff1a<\/span><\/strong><\/span><span class=\"md-plain\">\u63d0\u4f9b\u4e86\u5e94\u7528\u7a0b\u5e8f\u5230\u6570\u636e\u5e93\u8fde\u63a5\u89c4\u8303\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-pair-s \"><strong><span class=\"md-plain\">JDBC\u9a71\u52a8\u7a0b\u5e8f\uff1a<\/span><\/strong><\/span><span class=\"md-plain\"> \u8fde\u63a5\u6570\u636e\u5e93\u7684\u9a71\u52a8\u7a0b\u5e8f\u7684\u5b9e\u73b0\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"md-end-block md-p md-focus\"><span class=\"md-plain\">JDBC API\u4f7f\u7528\u9a71\u52a8\u7a0b\u5e8f\u7ba1\u7406\u5668\u548c\u7279\u5b9a\u4e8e\u6570\u636e\u5e93\u7684\u9a71\u52a8\u7a0b\u5e8f\u6765\u63d0\u4f9b\u4e0e\u5f02\u6784\u6570\u636e\u5e93\u7684\u900f\u660e\u8fde\u63a5\u3002<\/span><\/p>\n<p><strong><span style=\"color: #ff0000;\">JDBC\u6838\u5fc3\u7ec4\u4ef6<\/span><\/strong><\/p>\n<p><span style=\"color: #ff0000;\">DriverManager<\/span>\uff1a\u6b64\u7c7b\u7ba1\u7406\u6570\u636e\u5e93\u9a71\u52a8\u7a0b\u5e8f\u5217\u8868\u3002<br \/>\n<span style=\"color: #ff0000;\">Driver<\/span>\uff1a\u6b64\u63a5\u53e3\u5904\u7406\u4e0e\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684\u901a\u4fe1\uff0c\u5f88\u5c11\u4f1a\u76f4\u63a5\u4e0eDriver\u5bf9\u8c61\u8fdb\u884c\u4ea4\u4e92\uff0c\u800c\u662f\u4f7f\u7528DriverManager\u5bf9\u8c61\u6765\u7ba1\u7406\u8fd9\u79cd\u7c7b\u578b\u7684\u5bf9\u8c61\u3002<br \/>\n<span style=\"color: #ff0000;\">Connection<\/span>\uff1a\u8be5\u63a5\u53e3\u5177\u6709\u7528\u4e8e\u8fde\u63a5\u6570\u636e\u5e93\u7684\u6240\u6709\u65b9\u6cd5\u3002<br \/>\n<span style=\"color: #ff0000;\">Statement<\/span>\uff1a\u4f7f\u7528\u4ece\u6b64\u63a5\u53e3\u521b\u5efa\u7684\u5bf9\u8c61\u5c06SQL\u8bed\u53e5\u63d0\u4ea4\u5230\u6570\u636e\u5e93\u3002<br \/>\n<span style=\"color: #ff0000;\">ResultSet<\/span>\uff1a\u5728\u4f7f\u7528Statement\u5bf9\u8c61\u6267\u884cSQL\u8bed\u53e5\u67e5\u8be2\u540e\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u4fdd\u5b58\u4ece\u6570\u636e\u5e93\u68c0\u7d22\u7684\u6570\u636e\u3002<br \/>\n<span style=\"color: #ff0000;\">SqlException<\/span>\uff1a\u6b64\u7c7b\u5904\u7406\u6570\u636e\u5e93\u5e94\u7528\u7a0b\u5e8f\u4e2d\u53d1\u751f\u7684\u4efb\u4f55\u5f02\u5e38<\/p>\n<p><strong><span style=\"color: #ff0000;\">JDBC\u521d\u59cb<\/span><\/strong><\/p>\n<p>\u4f7f\u7528\u6b65\u9aa4<br \/>\n\u6784\u5efaJDBC\u5e94\u7528\u7a0b\u5e8f\u8bbe\u8ba1\u4ee5\u4e0b6\u4e2a\u6b65\u9aa4<\/p>\n<p>1.\u5bfc\u5165JDBC\u9a71\u52a8\u5305\uff1a\u9700\u8981\u4e0b\u8f7d\u5305\u542b\u6570\u636e\u5e93\u7f16\u7a0b\u6240\u9700\u7684JDBC\u7684jar\u5305<br \/>\n\u5bfc\u5165jar\u5305\uff0c\u5728\u9879\u76ee\u4e0b\u521b\u5efalib\u76ee\u5f55\uff0c\u628amysql\u7684jdbc\u5305\u653e\u5165\u6b64\u76ee\u5f55\uff0c\u7136\u540e\u53f3\u952e\u6dfb\u52a0\u5230\u5e93(add as libary)<\/p>\n<p>2.\u6ce8\u518cJDBC\u9a71\u52a8\u7a0b\u5e8f\uff1a\u8981\u6c42\u60a8\u521d\u59cb\u5316\u9a71\u52a8\u7a0b\u5e8f\uff0c\u4ee5\u4fbf\u60a8\u53ef\u4ee5\u6253\u5f00\u4e0e\u6570\u636e\u5e93\u7684\u901a\u4fe1\u901a\u9053\u3002<br \/>\nClass.forName(&#8220;com.mysql.jdbc.Driver&#8221;);<\/p>\n<p>3.\u521b\u5efa\u8fde\u63a5\uff1a\u9700\u8981\u4f7f\u7528DriverManager.getConnection()\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2aConnection\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u8868\u793a\u4e0e\u6570\u636e\u5e93\u7269\u7406\u8fde\u63a5<br \/>\nConnection c=DriverManager.getConnection(&#8220;jdbc:mysql:\/\/localhost:3306\/\u5e93\u540d&#8221;,&#8221;\u7528\u6237\u540d&#8221;,&#8221;\u5bc6\u7801&#8221;);<\/p>\n<p>4.\u6267\u884c\u67e5\u8be2\uff1a\u9700\u8981\u4f7f\u7528\u7c7b\u578b\u4e3aStatement\u7684\u5bf9\u8c61\u6765\u6784\u5efa\u548c\u63d0\u4ea4SQL\u8bed\u53e5\u5230\u6570\u636e\u5e93\u3002<\/p>\n<p>5.\u4ece\u7ed3\u679c\u96c6\u4e2d\u63d0\u53d6\u6570\u636e\uff1a\u9700\u8981\u4f7f\u7528\u76f8\u5e94\u7684ResultSet.getXXX() \u65b9\u6cd5\u4ece\u7ed3\u679c\u96c6\u4e2d\u68c0\u7d22\u6570\u636e\u3002<\/p>\n<p>6.\u91ca\u653e\u8d44\u6e90\uff1a\u9700\u8981\u660e\u786e\u5730\u5173\u95ed\u6240\u6709\u6570\u636e\u5e93\u8d44\u6e90\uff0c\u800c\u4e0d\u4f9d\u8d56\u4e8eJVM\u5783\u573e\u6536\u96c6\u3002<br \/>\nc.close();<\/p>\n<p><strong><span style=\"color: #ff0000;\">JDBC\u6267\u884cSQL\u8bed\u53e5<\/span><\/strong><\/p>\n<p>\u4e00\u65e6\u83b7\u5f97\u4e86\u8fde\u63a5\uff0c\u6211\u4eec\u53ef\u4ee5\u4e0e\u6570\u636e\u5e93\u8fdb\u884c\u4ea4\u4e92\u3002JDBC Statement\u548cPreparedStatement\u63a5\u53e3\u5b9a\u4e49\u4e86\u4f7f\u60a8\u80fd\u591f\u53d1\u9001SQL\u547d\u4ee4\u5e76\u4ece\u6570\u636e\u5e93\u63a5\u6536\u6570\u636e\u7684\u65b9\u6cd5\u548c\u5c5e\u6027\u3002<\/p>\n<p>\u63a5\u53e3statement\uff1a\u7528\u4e8e\u5bf9\u6570\u636e\u5e93\u8fdb\u884c\u901a\u7528\u8bbf\u95ee\u3002\u5728\u8fd0\u884c\u65f6\u4f7f\u7528\u9759\u6001SQL\u8bed\u53e5\u65f6\u5f88\u6709\u7528\u3002Statement\u63a5\u53e3\u4e0d\u80fd\u63a5\u53d7\u53c2\u6570\u3002<\/p>\n<p>\u63a5\u53e3PreparedStatement\uff1a\u5f53\u60a8\u8ba1\u5212\u591a\u6b21\u4f7f\u7528SQL\u8bed\u53e5\u65f6\u4f7f\u7528\u3002PreparedStatement\u63a5\u53e3\u5728\u8fd0\u884c\u65f6\u63a5\u53d7\u8f93\u5165\u53c2\u6570\u3002<\/p>\n<p><span style=\"color: #ff0000;\">statement\u521b\u5efa\u8bed\u53e5\u5bf9\u8c61<\/span><\/p>\n<p>\u5728\u4f7f\u7528Statement\u5bf9\u8c61\u6267\u884cSQL\u8bed\u53e5\u4e4b\u524d\uff0c\u9700\u8981\u4f7f\u7528Connection\u5bf9\u8c61\u7684createStatement\uff08\uff09\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a<\/p>\n<p>Statement s=c.createStatement();<\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain md-expand\">\u521b\u5efaStatement\u5bf9\u8c61\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5b83\u6765\u6267\u884c\u4e00\u4e2aSQL\u8bed\u53e5\uff0c\u5176\u4e2d\u6709\u4e09\u4e2a\u6267\u884c\u65b9\u6cd5\u4e4b\u4e00\u3002<\/span><\/p>\n<ul class=\"ul-list\" data-mark=\"-\">\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-pair-s \"><strong><span class=\"md-plain\">boolean execute\uff08String SQL\uff09<\/span><\/strong><\/span><span class=\"md-plain\">\uff1a\u5982\u679c\u53ef\u4ee5\u68c0\u7d22\u5230ResultSet\u5bf9\u8c61\uff0c\u5219\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503ctrue; \u5426\u5219\u8fd4\u56defalse\u3002\u4f7f\u7528\u6b64\u65b9\u6cd5\u6267\u884cSQL DDL\u8bed\u53e5\u6216\u9700\u8981\u4f7f\u7528\u771f\u6b63\u7684\u52a8\u6001SQL\u65f6\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p\"><span class=\"md-pair-s \"><strong><span class=\"md-plain\">int executeUpdate\uff08String SQL\uff09<\/span><\/strong><\/span><span class=\"md-plain\">\uff1a\u8fd4\u56de\u53d7SQL\u8bed\u53e5\u6267\u884c\u5f71\u54cd\u7684\u884c\u6570\u3002\u4f7f\u7528\u6b64\u65b9\u6cd5\u6267\u884c\u9884\u671f\u4f1a\u5f71\u54cd\u591a\u4e2a\u884c\u7684SQL\u8bed\u53e5\uff0c\u4f8b\u5982INSERT\uff0cUPDATE\u6216DELETE\u8bed\u53e5\u3002<\/span><\/p>\n<\/li>\n<li class=\"md-list-item\">\n<p class=\"md-end-block md-p md-focus\"><span class=\"md-pair-s \"><strong><span class=\"md-plain\">ResultSet executeQuery\uff08String SQL\uff09<\/span><\/strong><\/span><span class=\"md-plain md-expand\">\uff1a\u8fd4\u56de\u4e00\u4e2aResultSet\u5bf9\u8c61\u3002\u5f53\u60a8\u5e0c\u671b\u83b7\u5f97\u7ed3\u679c\u96c6\u65f6\uff0c\u8bf7\u4f7f\u7528\u6b64\u65b9\u6cd5\uff0c\u5c31\u50cf\u4f7f\u7528SELECT\u8bed\u53e5\u4e00\u6837\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n<p>\u5173\u95edStatement\u5bf9\u8c61\uff1as.close();<\/p>\n<p><span style=\"color: #ff0000;\">ResultSet<\/span><\/p>\n<p>SELECT\u8bed\u53e5\u662f\u4ece\u6570\u636e\u5e93\u4e2d\u9009\u62e9\u884c\u5e76\u5728\u7ed3\u679c\u96c6\u4e2d\u67e5\u770b\u884c\u7684\u6807\u51c6\u65b9\u6cd5\u3002<\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">ResultSet\u5bf9\u8c61\u7ef4\u62a4\u6307\u5411\u7ed3\u679c\u96c6\u4e2d\u5f53\u524d\u884c\u7684\u6e38\u6807\u3002\u672f\u8bed\u201c\u7ed3\u679c\u96c6\u201d\u662f\u6307\u5305\u542b\u5728ResultSet\u5bf9\u8c61\u4e2d\u7684\u884c\u548c\u5217\u6570\u636e\u3002<\/span><\/p>\n<p class=\"md-end-block md-p md-focus\"><span class=\"md-plain\">\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u4efb\u4f55ResultSet\u7c7b\u578b\uff0c\u60a8\u5c06\u81ea\u52a8\u83b7\u5f97\u4e00\u4e2aTYPE_FORWARD_ONLY\u3002<\/span><\/p>\n<p><span style=\"color: #ff0000;\">\u7c7b\u578b<\/span>\uff1a<br \/>\nResultSet.<span class=\"md-plain\">TYPE_FORWARD_ONLY \uff1a\u5149\u6807\u53ea\u80fd\u5728\u7ed3\u679c\u96c6\u4e2d\u5411\u524d\u79fb\u52a8<\/span><\/p>\n<p>ResultSet.TYPE_SCROLL_INSENSITIVE \uff1a\u5149\u6807\u53ef\u4ee5\u5411\u524d\u548c\u5411\u540e\u6eda\u52a8\uff0c\u7ed3\u679c\u96c6\u5bf9\u521b\u5efa\u7ed3\u679c\u96c6\u540e\u53d1\u751f\u7684\u6570\u636e\u5e93\u7684\u5176\u4ed6\u66f4\u6539\u4e0d\u654f\u611f\u3002<\/p>\n<p>ResultSet.TYPE_SCROLL_SENSITIVE \uff1a\u5149\u6807\u53ef\u4ee5\u5411\u524d\u548c\u5411\u540e\u6eda\u52a8\uff0c\u7ed3\u679c\u96c6\u5bf9\u521b\u5efa\u7ed3\u679c\u96c6\u4e4b\u540e\u53d1\u751f\u7684\u5176\u4ed6\u6570\u636e\u5e93\u6240\u505a\u7684\u66f4\u6539\u654f\u611f\u3002<\/p>\n<p><strong><span style=\"color: #ff0000;\">JDBC\u6267\u884cDQL<\/span><\/strong><\/p>\n<pre>public class TestJDBC {\r\n    public static void main(String[] args) {\r\n        Connection connection=null;\r\n        Statement statement=null;\r\n        ResultSet resultSet=null;\r\n        try{\r\n            \/\/1.\u6ce8\u518c\u9a71\u52a8\r\n            Class.forName(\"com.mysql.jdbc.Driver\");\r\n            \/\/2.\u521b\u5efaConnection\u5bf9\u8c61\r\n            connection = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/demos\", \"root\", \"root\");\r\n            \/\/3.\u521b\u5efa\u6267\u884cSQL\u8bed\u53e5\u7684\u5bf9\u8c61\r\n            statement = connection.createStatement();\r\n            \/\/4.sql\u8bed\u53e5\r\n            String sql=\"select id,sname,sex from stu\";\r\n            \/\/5.\u6267\u884cSQL\u8bed\u53e5\r\n            resultSet = statement.executeQuery(sql);\r\n            \/\/6.\u904d\u5386\r\n            while (resultSet.next()) {\r\n                int id = resultSet.getInt(1);\r\n                String sname = resultSet.getString(\"sname\");\r\n                String sex = resultSet.getString(\"sex\");\r\n                System.out.println(id+\":\"+sname+\":\"+sex);\r\n            }\r\n        }catch (Exception e){}finally {\r\n            try{\r\n                if (resultSet != null) {\r\n                    resultSet.close();\r\n                }\r\n                if (statement != null) {\r\n                    statement.close();\r\n                }\r\n                if (connection != null) {\r\n                    connection.close();\r\n                }\r\n            }catch (Exception e){}\r\n        }\r\n    }\r\n}<\/pre>\n<p><strong><span style=\"color: #ff0000;\">SQL\u6ce8\u5165<\/span><\/strong><\/p>\n<p>\u5c31\u662f\u901a\u8fc7\u628aSQL\u547d\u4ee4\u63d2\u5165\u5230Web\u8868\u5355\u63d0\u4ea4\u6216\u8f93\u5165\u57df\u540d\u6216\u9875\u9762\u8bf7\u6c42\u7684\u67e5\u8be2\u5b57\u7b26\u4e32\uff0c\u6700\u7ec8\u8fbe\u5230\u6b3a\u9a97\u670d\u52a1\u5668\u6267\u884c\u6076\u610f\u7684SQL\u547d\u4ee4\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u5b83\u662f\u5229\u7528\u73b0\u6709\u5e94\u7528\u7a0b\u5e8f\uff0c\u5c06\uff08\u6076\u610f\u7684\uff09SQL\u547d\u4ee4\u6ce8\u5165\u5230\u540e\u53f0\u6570\u636e\u5e93\u5f15\u64ce\u6267\u884c\u7684\u80fd\u529b\uff0c\u5b83\u53ef\u4ee5\u901a\u8fc7\u5728Web\u8868\u5355\u4e2d\u8f93\u5165\uff08\u6076\u610f\uff09SQL\u8bed\u53e5\u5f97\u5230\u4e00\u4e2a\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u7684\u7f51\u7ad9\u4e0a\u7684\u6570\u636e\u5e93\uff0c\u800c\u4e0d\u662f\u6309\u7167\u8bbe\u8ba1\u8005\u610f\u56fe\u53bb\u6267\u884cSQL\u8bed\u53e5\u3002\u6bd4\u5982\u5148\u524d\u7684\u5f88\u591a\u5f71\u89c6\u7f51\u7ad9\u6cc4\u9732VIP\u4f1a\u5458\u5bc6\u7801\u5927\u591a\u5c31\u662f\u901a\u8fc7WEB\u8868\u5355\u9012\u4ea4\u67e5\u8be2\u5b57\u7b26\u66b4\u51fa\u7684\uff0c\u8fd9\u7c7b\u8868\u5355\u7279\u522b\u5bb9\u6613\u53d7\u5230SQL\u6ce8\u5165\u5f0f\u653b\u51fb\u3002<\/p>\n<p><strong><span style=\"color: #ff0000;\">PreparedStatement\u89e3\u51b3SQL\u6ce8\u5165<\/span><\/strong><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u8be5<\/span><span class=\"md-pair-s \"><em><span class=\"md-plain\">PreparedStatement\u7684<\/span><\/em><\/span><span class=\"md-plain\">\u63a5\u53e3\u6269\u5c55\u4e86Statement\u63a5\u53e3\uff0c\u5b83\u4e3a\u60a8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u901a\u7528\u7684Statement\u5bf9\u8c61\u6709\u4e24\u4e2a\u4f18\u70b9\u9644\u52a0\u529f\u80fd\u3002<\/span><\/p>\n<p class=\"md-end-block md-p md-focus\"><span class=\"md-plain\">\u4f5c\u7528\uff1a1\u9884\u7f16\u8bd1\uff0c\u6548\u7387\u9ad8 2 \u5b89\u5168\uff0c\u907f\u514dSQL\u6ce8\u5165<\/span><\/p>\n<p>String SQL = &#8220;Update Employees SET age = ? WHERE id = ?&#8221;;<\/p>\n<p><span class=\"md-plain\">JDBC\u4e2d\u7684\u6240\u6709\u53c2\u6570\u90fd\u7531<\/span><span class=\"md-pair-s \"><strong><span class=\"md-plain\">\uff1f<\/span><\/strong><\/span><span class=\"md-plain\">\u7b26\u53f7\uff0c\u8fd9\u88ab\u79f0\u4e3a\u53c2\u6570\u6807\u8bb0\u3002\u5728\u6267\u884cSQL\u8bed\u53e5\u4e4b\u524d\uff0c\u5fc5\u987b\u4e3a\u6bcf\u4e2a\u53c2\u6570\u63d0\u4f9b\u503c<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u6240\u8ff0<\/span><span class=\"md-pair-s \"><strong><span class=\"md-plain\">\u7684setXXX\uff08\uff09<\/span><\/strong><\/span><span class=\"md-plain\">\u65b9\u6cd5\u5c06\u503c\u7ed1\u5b9a\u5230\u6240\u8ff0\u53c2\u6570\uff0c\u5176\u4e2d<\/span><span class=\"md-pair-s \"><strong><span class=\"md-plain\">XXX<\/span><\/strong><\/span><span class=\"md-plain\">\u4ee3\u8868\u8981\u7ed1\u5b9a\u5230\u8f93\u5165\u53c2\u6570\u7684\u503c\u7684Java\u6570\u636e\u7c7b\u578b\u3002\u5982\u679c\u5fd8\u8bb0\u63d0\u4f9b\u503c\uff0c\u5c06\u6536\u5230\u4e00\u4e2aSQLException\u3002<\/span><\/p>\n<p class=\"md-end-block md-p md-focus\"><span class=\"md-plain\">\u6bcf\u4e2a\u53c2\u6570\u6807\u8bb0\u7531\u5176\u987a\u5e8f\u4f4d\u7f6e\u5f15\u7528\u3002\u7b2c\u4e00\u4e2a\u6807\u8bb0\u8868\u793a\u4f4d\u7f6e1\uff0c\u4e0b\u4e00\u4e2a\u4f4d\u7f6e2\u7b49\u7b49\u3002\u8be5\u65b9\u6cd5\u4e0eJava\u6570\u7ec4\u7d22\u5f15\u4e0d\u540c\uff0c\u4ece0\u5f00\u59cb\u3002<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><strong><span style=\"color: #ff0000;\">JDBC\u603b\u7ed3<\/span><\/strong><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\"><span style=\"color: #ff0000;\">1 jdbc\u4ecb\u7ecd<\/span> \uff1a<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Java Database Connectity java\u6570\u636e\u5e93\u8fde\u63a5\u6280\u672f<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">\u5b9a\u4e49\u4e00\u5957\u8fde\u63a5\u6570\u636e\u7684\u89c4\u8303\u548c\u6807\u51c6\u3002<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\" style=\"color: #ff0000;\">2 jdbc\u5305\u542b\u4e24\u4e2a\u90e8\u5206<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">JDBC API<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">JDBC \u9a71\u52a8\u7a0b\u5e8f<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\" style=\"color: #ff0000;\">3 JDBC\u7684\u4f7f\u7528\u6b65\u9aa4<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">1 \u5bfc\u5165jar\u5305<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">2 \u6ce8\u518c\u9a71\u52a8<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">3 \u83b7\u53d6\u8fde\u63a5<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">4 \u521b\u5efa\u547d\u4ee4<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">5 \u6267\u884c\u547d\u4ee4\uff0c\u5904\u7406\u7ed3\u679c<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">6 \u91ca\u653e\u8d44\u6e90<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\" style=\"color: #ff0000;\">4 JDBC\u7684api <\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Driver \u9a71\u52a8<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">DriverManager \u9a71\u52a8\u7ba1\u7406\u7c7b<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\"> Connection \u8d1f\u8d23\u8fde\u63a5\u6570\u636e\u5e93<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">Statement \u8d1f\u8d23\u6267\u884c\u547d\u4ee4<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">ResultSet \u5c01\u88c5\u7ed3\u679c\u96c6<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">PreparedStatment \u9884\u7f16\u8bd1\u547d\u4ee4 <\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\" style=\"color: #ff0000;\">5 \u6570\u636e\u5e93\u5de5\u5177\u7c7b<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">DbUtils.java<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">1 \u6ce8\u518c\u9a71\u52a8<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">2 \u83b7\u53d6\u8fde\u63a5<\/span><\/p>\n<p class=\"md-end-block md-p\"><span class=\"md-plain\">3 \u91ca\u653e\u8d44\u6e90<\/span><\/p>\n<p class=\"md-end-block md-p md-focus\"><span class=\"md-plain\">4 \u6267\u884c\u547d\u4ee4 \uff08\u589e\u5220\u6539 DDL\uff09<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>2020Javaweb\u6559\u7a0b\u4e4bJDBC JDBC\u7b80\u4ecb JDBC\uff08Java DataBase Connectivi [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2362","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2362","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2362"}],"version-history":[{"count":1,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2362\/revisions"}],"predecessor-version":[{"id":2363,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2362\/revisions\/2363"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}