{"id":62123,"date":"2024-10-13T16:23:22","date_gmt":"2024-10-13T08:23:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/62123\/"},"modified":"2024-10-13T16:23:22","modified_gmt":"2024-10-13T08:23:22","slug":"java%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e8%a9%b2%e5%a6%82%e4%bd%95%e8%aa%bf%e7%94%a8%ef%bc%9f-java%e4%b8%ad%e8%aa%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/62123\/","title":{"rendered":"Java\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u8a72\u5982\u4f55\u8abf\u7528\uff1f (java\u4e2d\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b)"},"content":{"rendered":"<h1 id=\"java%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e8%a9%b2%e5%a6%82%e4%bd%95%e8%aa%bf%e7%94%a8%ef%bc%9f-RouTSBfYlb\">Java\u4e2d\u7684\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u8a72\u5982\u4f55\u8abf\u7528\uff1f<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0cJava\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u7d93\u5e38\u8207\u5404\u7a2e\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u7121\u8ad6\u662f\u95dc\u806f\u578b\u6578\u64da\u5eab\u9084\u662f\u975e\u95dc\u806f\u578b\u6578\u64da\u5eab\uff0c\u4e86\u89e3\u5982\u4f55\u5728Java\u4e2d\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0eJava\u4e2d\u5982\u4f55\u6709\u6548\u5730\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-RouTSBfYlb\">\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u6982\u8ff0<\/h2>\n<p>\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u985e\u578b\u901a\u5e38\u5206\u70ba\u5e7e\u500b\u4e3b\u8981\u985e\u5225\uff0c\u5305\u62ec\u6574\u6578\u985e\u578b\u3001\u6d6e\u9ede\u6578\u985e\u578b\u3001\u5b57\u7b26\u985e\u578b\u548c\u65e5\u671f\u6642\u9593\u985e\u578b\u3002\u9019\u4e9b\u6578\u64da\u985e\u578b\u5728Java\u4e2d\u6709\u76f8\u61c9\u7684\u6620\u5c04\uff0c\u958b\u767c\u8005\u9700\u8981\u4e86\u89e3\u9019\u4e9b\u6620\u5c04\u4ee5\u4fbf\u6b63\u78ba\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<ul>\n<li><strong>\u6574\u6578\u985e\u578b\uff1a<\/strong>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u6574\u6578\u985e\u578b\u901a\u5e38\u5305\u62ec INT\u3001SMALLINT\u3001BIGINT \u7b49\u3002\u5728Java\u4e2d\uff0c\u9019\u4e9b\u985e\u578b\u53ef\u4ee5\u6620\u5c04\u70ba <code>int<\/code>\u3001<code>short<\/code> \u548c <code>long<\/code>\u3002<\/li>\n<li><strong>\u6d6e\u9ede\u6578\u985e\u578b\uff1a<\/strong>\u6578\u64da\u5eab\u4e2d\u7684\u6d6e\u9ede\u6578\u985e\u578b\u5982 FLOAT \u548c DOUBLE\uff0c\u5c0d\u61c9\u65bcJava\u4e2d\u7684 <code>float<\/code> \u548c <code>double<\/code>\u3002<\/li>\n<li><strong>\u5b57\u7b26\u985e\u578b\uff1a<\/strong>CHAR \u548c VARCHAR \u985e\u578b\u5728Java\u4e2d\u901a\u5e38\u4f7f\u7528 <code>String<\/code> \u4f86\u8868\u793a\u3002<\/li>\n<li><strong>\u65e5\u671f\u6642\u9593\u985e\u578b\uff1a<\/strong>\u6578\u64da\u5eab\u4e2d\u7684 DATE\u3001TIME \u548c TIMESTAMP \u985e\u578b\u53ef\u4ee5\u6620\u5c04\u70ba Java \u7684 <code>java.sql.Date<\/code>\u3001<code>java.sql.Time<\/code> \u548c <code>java.sql.Timestamp<\/code>\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8java%e4%b8%ad%e8%aa%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-RouTSBfYlb\">\u5982\u4f55\u5728Java\u4e2d\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728Java\u4e2d\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u7684\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u5230 JDBC\uff08Java Database Connectivity\uff09\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%8a%a0%e8%bc%89%e6%95%b8%e6%93%9a%e5%ba%ab%e9%a9%85%e5%8b%95-RouTSBfYlb\">1. \u52a0\u8f09\u6578\u64da\u5eab\u9a45\u52d5<\/h3>\n<pre><code>Class.forName(\"com.mysql.cj.jdbc.Driver\");<\/code><\/pre>\n<p>\u9019\u884c\u4ee3\u78bc\u7528\u65bc\u52a0\u8f09 MySQL \u6578\u64da\u5eab\u7684 JDBC \u9a45\u52d5\u3002<\/p>\n<h3 id=\"2-%e5%bb%ba%e7%ab%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-RouTSBfYlb\">2. \u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5<\/h3>\n<pre><code>Connection connection = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost:3306\/yourDatabase\", \"username\", \"password\");<\/code><\/pre>\n<p>\u9019\u88e1\u9700\u8981\u66ff\u63db\u70ba\u5be6\u969b\u7684\u6578\u64da\u5eab URL\u3001\u7528\u6236\u540d\u548c\u5bc6\u78bc\u3002<\/p>\n<h3 id=\"3-%e5%89%b5%e5%bb%ba%e8%aa%9e%e5%8f%a5%e5%b0%8d%e8%b1%a1-RouTSBfYlb\">3. \u5275\u5efa\u8a9e\u53e5\u5c0d\u8c61<\/h3>\n<pre><code>Statement statement = connection.createStatement();<\/code><\/pre>\n<p>\u4f7f\u7528\u8a9e\u53e5\u5c0d\u8c61\u4f86\u57f7\u884c SQL \u67e5\u8a62\u3002<\/p>\n<h3 id=\"4-%e5%9f%b7%e8%a1%8c%e6%9f%a5%e8%a9%a2%e4%b8%a6%e8%99%95%e7%90%86%e7%b5%90%e6%9e%9c-RouTSBfYlb\">4. \u57f7\u884c\u67e5\u8a62\u4e26\u8655\u7406\u7d50\u679c<\/h3>\n<pre><code>ResultSet resultSet = statement.executeQuery(\"SELECT * FROM yourTable\");<\/code><\/pre>\n<p>\u63a5\u4e0b\u4f86\uff0c\u4f7f\u7528 <code>ResultSet<\/code> \u4f86\u8655\u7406\u67e5\u8a62\u7d50\u679c\uff1a<\/p>\n<pre><code>while (resultSet.next()) {\n    int id = resultSet.getInt(\"id\");\n    String name = resultSet.getString(\"name\");\n    double salary = resultSet.getDouble(\"salary\");\n    Date hireDate = resultSet.getDate(\"hire_date\");\n    \/\/ \u9032\u4e00\u6b65\u8655\u7406\u6578\u64da\n}<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-RouTSBfYlb\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u985e\u578b\u7684\u5339\u914d\uff1a\u5728\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6578\u64da\u6642\uff0c\u5fc5\u9808\u78ba\u4fdd Java \u4e2d\u7684\u6578\u64da\u985e\u578b\u8207\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u985e\u578b\u76f8\u5339\u914d\uff0c\u4ee5\u907f\u514d\u985e\u578b\u8f49\u63db\u932f\u8aa4\u3002<\/li>\n<li>\u8655\u7406\u7570\u5e38\uff1a\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u61c9\u8a72\u4f7f\u7528 <code>try-catch<\/code> \u584a\u4f86\u6355\u7372\u548c\u8655\u7406\u53ef\u80fd\u51fa\u73fe\u7684\u7570\u5e38\u3002<\/li>\n<li>\u95dc\u9589\u8cc7\u6e90\uff1a\u5728\u5b8c\u6210\u6578\u64da\u5eab\u64cd\u4f5c\u5f8c\uff0c\u61c9\u8a72\u95dc\u9589 <code>ResultSet<\/code>\u3001<code>Statement<\/code> \u548c <code>Connection<\/code> \u4ee5\u91cb\u653e\u8cc7\u6e90\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-RouTSBfYlb\">\u7e3d\u7d50<\/h2>\n<p>\u5728Java\u4e2d\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\u662f\u4e00\u500b\u91cd\u8981\u7684\u6280\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u6709\u6548\u5730\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\u3002\u901a\u904e\u4e86\u89e3\u6578\u64da\u985e\u578b\u7684\u6620\u5c04\u548c\u4f7f\u7528JDBC\u9032\u884c\u6578\u64da\u64cd\u4f5c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u597d\u5730\u7ba1\u7406\u548c\u8655\u7406\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728Java\u4e2d\u8abf\u7528\u6578\u64da\u5eab\u6578\u64da\u985e\u578b\uff0c\u638c\u63e1\u6578\u64da\u5eab\u9023\u63a5\u3001\u67e5\u8a62\u548c\u6578\u64da\u8655\u7406\u7684\u6280\u5de7\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-62123","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62123","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=62123"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62123\/revisions"}],"predecessor-version":[{"id":62124,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62123\/revisions\/62124"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=62123"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=62123"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=62123"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}