{"id":62133,"date":"2024-10-13T16:28:16","date_gmt":"2024-10-13T08:28:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/62133\/"},"modified":"2024-10-13T16:28:16","modified_gmt":"2024-10-13T08:28:16","slug":"jdbc%e9%80%a3%e6%8e%a5db2%e7%9a%84%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/62133\/","title":{"rendered":"JDBC\u9023\u63a5DB2\u7684\u64cd\u4f5c\u6280\u5de7\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

JDBC\u9023\u63a5DB2\u7684\u64cd\u4f5c\u6280\u5de7\u6709\u54ea\u4e9b\uff1f<\/h1>\n

\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cJava\u6578\u64da\u5eab\u9023\u63a5\uff08JDBC\uff09\u6210\u70ba\u4e86\u958b\u767c\u8005\u8207\u6578\u64da\u5eab\u4e4b\u9593\u7684\u91cd\u8981\u6a4b\u6a11\u3002\u7279\u5225\u662f\u5c0d\u65bcIBM\u7684DB2\u6578\u64da\u5eab\uff0c\u638c\u63e1JDBC\u7684\u64cd\u4f5c\u6280\u5de7\u80fd\u5920\u986f\u8457\u63d0\u9ad8\u958b\u767c\u6548\u7387\u548c\u61c9\u7528\u6027\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u9023\u63a5DB2\u7684\u64cd\u4f5c\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u4f7f\u7528JDBC\u3002<\/p>\n

1. \u78ba\u4fddJDBC\u9a45\u52d5\u7684\u6b63\u78ba\u6027<\/h2>\n

\u5728\u4f7f\u7528JDBC\u9023\u63a5DB2\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u78ba\u4fdd\u5df2\u7d93\u4e0b\u8f09\u4e26\u914d\u7f6e\u4e86\u6b63\u78ba\u7684JDBC\u9a45\u52d5\u3002IBM\u63d0\u4f9b\u4e86\u591a\u7a2e\u7248\u672c\u7684JDBC\u9a45\u52d5\uff0c\u958b\u767c\u8005\u9700\u8981\u6839\u64da\u81ea\u5df1\u7684DB2\u7248\u672c\u9078\u64c7\u5408\u9069\u7684\u9a45\u52d5\u3002\u901a\u5e38\uff0c\u9a45\u52d5\u7684jar\u6587\u4ef6\u9700\u8981\u6dfb\u52a0\u5230\u9805\u76ee\u7684classpath\u4e2d\u3002<\/p>\n

Class.forName(\"com.ibm.db2.jcc.DB2Driver\");<\/code><\/pre>\n
2. \u5efa\u7acb\u9023\u63a5<\/h2>\n
\u5efa\u7acb\u9023\u63a5\u7684\u904e\u7a0b\u4e2d\uff0c\u9700\u8981\u63d0\u4f9b\u6578\u64da\u5eab\u7684URL\u3001\u7528\u6236\u540d\u548c\u5bc6\u78bc\u3002DB2\u7684\u9023\u63a5URL\u683c\u5f0f\u5982\u4e0b\uff1a<\/p>\n
String url = \"jdbc:db2:\/\/:\/\";<\/code><\/pre>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u9023\u63a5\u793a\u4f8b\uff1a<\/p>\n
Connection conn = DriverManager.getConnection(url, \"username\", \"password\");<\/code><\/pre>\n
3. \u4f7f\u7528PreparedStatement\u63d0\u9ad8\u6027\u80fd<\/h2>\n
\u5728\u57f7\u884cSQL\u67e5\u8a62\u6642\uff0c\u4f7f\u7528PreparedStatement\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u4e26\u9632\u6b62SQL\u6ce8\u5165\u653b\u64ca\u3002PreparedStatement\u6703\u9810\u7de8\u8b6fSQL\u8a9e\u53e5\uff0c\u9019\u6a23\u5728\u591a\u6b21\u57f7\u884c\u76f8\u540c\u67e5\u8a62\u6642\uff0c\u53ef\u4ee5\u91cd\u8907\u4f7f\u7528\u5df2\u7de8\u8b6f\u7684\u8a9e\u53e5\u3002<\/p>\n
String sql = \"SELECT * FROM users WHERE username = ?\";\nPreparedStatement pstmt = conn.prepareStatement(sql);\npstmt.setString(1, \"exampleUser\");\nResultSet rs = pstmt.executeQuery();<\/code><\/pre>\n
4. \u8655\u7406\u4e8b\u52d9<\/h2>\n
DB2\u652f\u6301\u4e8b\u52d9\u8655\u7406\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u901a\u904e\u8a2d\u7f6e\u81ea\u52d5\u63d0\u4ea4\u6a21\u5f0f\u4f86\u63a7\u5236\u4e8b\u52d9\u7684\u958b\u59cb\u548c\u7d50\u675f\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u624b\u52d5\u63a7\u5236\u4e8b\u52d9\u7684\u793a\u4f8b\uff1a<\/p>\n
conn.setAutoCommit(false); \/\/ \u7981\u7528\u81ea\u52d5\u63d0\u4ea4\ntry {\n    \/\/ \u57f7\u884c\u591a\u500bSQL\u64cd\u4f5c\n    conn.commit(); \/\/ \u63d0\u4ea4\u4e8b\u52d9\n} catch (SQLException e) {\n    conn.rollback(); \/\/ \u56de\u6efe\u4e8b\u52d9\n}<\/code><\/pre>\n
5. \u95dc\u9589\u8cc7\u6e90<\/h2>\n
\u5728\u5b8c\u6210\u6578\u64da\u5eab\u64cd\u4f5c\u5f8c\uff0c\u52d9\u5fc5\u95dc\u9589\u6240\u6709\u7684\u8cc7\u6e90\uff0c\u4ee5\u907f\u514d\u5167\u5b58\u6cc4\u6f0f\u3002\u53ef\u4ee5\u4f7f\u7528try-with-resources\u8a9e\u53e5\u81ea\u52d5\u95dc\u9589\u8cc7\u6e90\uff1a<\/p>\n
try (Connection conn = DriverManager.getConnection(url, \"username\", \"password\");\n     PreparedStatement pstmt = conn.prepareStatement(sql);\n     ResultSet rs = pstmt.executeQuery()) {\n    \/\/ \u8655\u7406\u7d50\u679c\u96c6\n} catch (SQLException e) {\n    e.printStackTrace();\n}<\/code><\/pre>\n
6. \u932f\u8aa4\u8655\u7406<\/h2>\n
\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u932f\u8aa4\u8655\u7406\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u958b\u767c\u8005\u61c9\u8a72\u6355\u7372SQLException\u4e26\u6839\u64da\u932f\u8aa4\u4ee3\u78bc\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\uff0c\u4ee5\u63d0\u9ad8\u61c9\u7528\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n
catch (SQLException e) {\n    System.err.println(\"SQL\u932f\u8aa4\u4ee3\u78bc: \" + e.getErrorCode());\n    System.err.println(\"\u932f\u8aa4\u4fe1\u606f: \" + e.getMessage());\n}<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u638c\u63e1JDBC\u9023\u63a5DB2\u7684\u64cd\u4f5c\u6280\u5de7\u4e0d\u50c5\u80fd\u63d0\u9ad8\u958b\u767c\u6548\u7387\uff0c\u9084\u80fd\u589e\u5f37\u61c9\u7528\u7684\u5b89\u5168\u6027\u548c\u7a69\u5b9a\u6027\u3002\u5f9e\u78ba\u4fdd\u9a45\u52d5\u7684\u6b63\u78ba\u6027\u5230\u6709\u6548\u7684\u932f\u8aa4\u8655\u7406\uff0c\u6bcf\u4e00\u6b65\u90fd\u81f3\u95dc\u91cd\u8981\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u4e00\u500b\u660e\u667a\u7684\u9078\u64c7\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u5728\u4f7f\u7528JDBC\u9023\u63a5DB2\u6642\u66f4\u52a0\u5f97\u5fc3\u61c9\u624b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22JDBC\u9023\u63a5DB2\u7684\u64cd\u4f5c\u6280\u5de7\uff0c\u5305\u62ec\u914d\u7f6e\u3001\u6027\u80fd\u512a\u5316\u548c\u932f\u8aa4\u8655\u7406\uff0c\u63d0\u5347\u6578\u64da\u5eab\u4ea4\u4e92\u6548\u7387\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-62133","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62133","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=62133"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62133\/revisions"}],"predecessor-version":[{"id":62134,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/62133\/revisions\/62134"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=62133"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=62133"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=62133"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}