{"id":24,"date":"2022-06-18T11:05:14","date_gmt":"2022-06-18T03:05:14","guid":{"rendered":"https:\/\/blog.mumudlin.com\/?p=24"},"modified":"2022-06-28T23:28:59","modified_gmt":"2022-06-28T15:28:59","slug":"jdbc","status":"publish","type":"post","link":"https:\/\/blog.mumudlin.com\/index.php\/jdbc\/","title":{"rendered":"Jdbc"},"content":{"rendered":"<h2>jdbc\u521d\u6b65\u4f7f\u7528\u65b9\u5f0f<\/h2>\n<pre><code class=\"language-java\">\/\/\u6ce8\u518c\u9a71\u52a8\nClass.forName(&quot;com.mysql.jdbc.Driver&quot;);\n\nString url = &quot;jdbc:mysql:\/\/127.0.0.1:3306\/mybatis&quot;;\nString username = &quot;root&quot;;\nString password = &quot;root&quot;;\n\/\/\u83b7\u53d6\u8fde\u63a5\nConnection conn = DriverManager.getConnection(url,username,password);\n\n\/\/\u5b9a\u4e49sql\nString sql = &quot;update book_category set category_name = &#039;\u6d4b\u8bd52&#039; where category_id = 10&quot;;\n\n\/\/\u83b7\u53d6\u6267\u884csql\u7684\u5bf9\u8c61statement\nStatement stmt = conn.createStatement();\n\n\/\/\u6267\u884csql\nint count = stmt.executeUpdate(sql);\n\nSystem.out.println(count);\n\nstmt.close();\nconn.close();<\/code><\/pre>\n<p>\u5bf9\u4e8e\u65b0\u7684\u7248\u672c\u6765\u8bf4\uff0c\u53ef\u4ee5\u4e0d\u7528\u6ce8\u518c\u9a71\u52a8<\/p>\n<p>\u5bf9\u4e8e\u672c\u673a\u9ed8\u8ba4\u7aef\u53e33306\u7684\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u7701\u53bb127.0.0.1:3306<\/p>\n<p>\u5728\u8fde\u63a5url\u4e2d\u53ef\u4ee5\u4f7f\u7528useSSL=false\u5c06ssl\u8fde\u63a5\u7981\u7528<\/p>\n<h2>Connection\u4f5c\u7528<\/h2>\n<ol>\n<li>\u83b7\u53d6\u6267\u884cSQL\u7684\u5bf9\u8c61<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/rain-1302105611.cos.ap-chengdu.myqcloud.com\/\/mumublog202206181046450.png\" alt=\"Untitled\" \/><\/p>\n<ol>\n<li>\u4e8b\u52a1\u7ba1\u7406<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/rain-1302105611.cos.ap-chengdu.myqcloud.com\/\/mumublog202206181046903.png\" alt=\"Untitled\" \/><\/p>\n<h2>Statement\u4f5c\u7528<\/h2>\n<ol>\n<li>\u6267\u884cSQL\u8bed\u53e5<\/li>\n<\/ol>\n<p><img decoding=\"async\" src=\"https:\/\/rain-1302105611.cos.ap-chengdu.myqcloud.com\/\/mumublog202206181047166.png\" alt=\"Untitled\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rain-1302105611.cos.ap-chengdu.myqcloud.com\/\/mumublog202206181047474.png\" alt=\"Untitled\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rain-1302105611.cos.ap-chengdu.myqcloud.com\/\/mumublog202206181047441.png\" alt=\"Untitled\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rain-1302105611.cos.ap-chengdu.myqcloud.com\/\/mumublog202206181047188.png\" alt=\"Untitled\" \/><\/p>\n<h2>PrepareStatement\u4f5c\u7528<\/h2>\n<p>\u4f7f\u7528\u524d\u9700\u8981\u5728\u6570\u636e\u5e93\u8fde\u63a5\u914d\u7f6e\u4e2d\u6253\u5f00\u8be5\u529f\u80fd<\/p>\n<p>\u4f5c\u7528\uff1a<\/p>\n<pre><code>    \u9884\u7f16\u8bd1\uff0c\u540c\u79cd\u6a21\u677f\u53ea\u7f16\u8bd1\u4e00\u6b21\uff0c\u53ef\u4ee5\u51cf\u5c11\u8d44\u6e90\u5360\u7528\n\n    \u901a\u8fc7\u8f6c\u4e49\u7279\u6b8a\u5b57\u7b26\uff0c\u5b9e\u73b0\u9884\u9632SQL\u6ce8\u5165<\/code><\/pre>\n<h2>\u6570\u636e\u5e93\u8fde\u63a5\u6c60<\/h2>\n<p>\u76f8\u5f53\u4e8e\u5b58\u5728\u4e00\u4e2aconn\u6c60\uff0c\u5728\u591a\u4e2a\u7528\u6237\u8fde\u63a5\u65f6\u4f7f\u7528\u5df2\u7ecf\u5b58\u5728\u7684conn\u8fdb\u884c\u8fde\u63a5\uff0c\u907f\u514d\u7528\u6237\u9891\u7e41\u4f7f\u7528\u6570\u636e\u5e93\u5bfc\u81f4\u6bcf\u6b21\u9700\u8981\u91cd\u65b0\u5efa\u7acb\u65b0\u7684\u8fde\u63a5\uff0c\u51cf\u5c11\u8d44\u6e90\u5360\u7528<\/p>\n<p>\u6bd4\u8f83\u5e38\u7528\u7684\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u6280\u672f\u2014\u963f\u91cc\u5df4\u5df4\u7684\u5f00\u6e90\u6280\u672f Druid\u8fde\u63a5\u6c60\uff08\u5fb7\u9c81\u4f0a\uff09<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/rain-1302105611.cos.ap-chengdu.myqcloud.com\/\/mumublog202206181048954.png\" alt=\"Untitled\" style=\"zoom:150%;\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>jdbc\u521d\u6b65\u4f7f\u7528\u65b9\u5f0f \/\/\u6ce8\u518c\u9a71\u52a8 Class.forName(&quot;com.mysql.jdbc.Dr [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-24","post","type-post","status-publish","format-standard","hentry","category-javaweb"],"_links":{"self":[{"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/posts\/24","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/comments?post=24"}],"version-history":[{"count":1,"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/posts\/24\/revisions"}],"predecessor-version":[{"id":25,"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/posts\/24\/revisions\/25"}],"wp:attachment":[{"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/media?parent=24"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/categories?post=24"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.mumudlin.com\/index.php\/wp-json\/wp\/v2\/tags?post=24"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}