{"id":11911,"date":"2023-11-28T22:37:35","date_gmt":"2023-11-28T14:37:35","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11911"},"modified":"2023-12-11T14:39:11","modified_gmt":"2023-12-11T06:39:11","slug":"spring-deda0you-shen-me-yong","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/spring-deda0you-shen-me-yong\/","title":{"rendered":"Spring\u7684DA0\u6709\u4ec0\u4e48\u7528\uff1f"},"content":{"rendered":"

\u5728 Spring \u4e2d\uff0cDAO\uff08Data Access Object\uff09\u662f\u4e00\u79cd\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u7528\u4e8e\u5c06\u6570\u636e\u5b58\u53d6\u4ee3\u7801\u4e0e\u4e1a\u52a1\u903b\u8f91\u89e3\u8026\u3002Spring \u7684 DAO \u4e3b\u8981\u7528\u4e8e\u7b80\u5316\u6570\u636e\u8bbf\u95ee\u5c42\u7684\u5f00\u53d1\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u6807\u51c6\u7684\u65b9\u5f0f\u6765\u8bbf\u95ee\u6570\u636e\u5e93\u6216\u5176\u4ed6\u6570\u636e\u5b58\u50a8\u3002<\/p>\n

\u4e3b\u8981\u7528\u9014\u548c\u4f18\u70b9\u5305\u62ec\uff1a<\/p>\n

    \n
  1. \n\u62bd\u8c61\u6570\u636e\u5e93\u8bbf\u95ee\uff1a<\/strong> DAO \u63d0\u4f9b\u4e86\u5bf9\u6570\u636e\u5b58\u53d6\u7684\u62bd\u8c61\uff0c\u4f7f\u5f00\u53d1\u8005\u80fd\u591f\u4f7f\u7528\u9762\u5411\u5bf9\u8c61\u7684\u65b9\u5f0f\u800c\u4e0d\u7528\u5173\u5fc3\u5177\u4f53\u7684\u6570\u636e\u5b58\u50a8\u5b9e\u73b0\u7ec6\u8282\u3002\u8fd9\u6709\u52a9\u4e8e\u964d\u4f4e\u8026\u5408\u5ea6\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u6d4b\u8bd5\u6027\u3002\n<\/li>\n
  2. \n\u5c01\u88c5\u6570\u636e\u5b58\u53d6\u7ec6\u8282\uff1a<\/strong> DAO \u5c01\u88c5\u4e86\u6570\u636e\u5b58\u53d6\u7684\u7ec6\u8282\uff0c\u5305\u62ec\u6570\u636e\u5e93\u8fde\u63a5\u3001SQL \u67e5\u8be2\u548c\u4e8b\u52a1\u7ba1\u7406\u7b49\u3002\u8fd9\u4f7f\u5f97\u5f00\u53d1\u8005\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\uff0c\u800c\u4e0d\u7528\u5173\u5fc3\u4f4e\u5c42\u6b21\u7684\u6570\u636e\u8bbf\u95ee\u7ec6\u8282\u3002\n<\/li>\n
  3. \n\u63d0\u9ad8\u53ef\u6d4b\u8bd5\u6027\uff1a<\/strong> \u901a\u8fc7\u4f7f\u7528 DAO \u63a5\u53e3\u548c\u6a21\u62df\u5bf9\u8c61\uff08Mock objects\uff09\uff0c\u53ef\u4ee5\u66f4\u5bb9\u6613\u5730\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u5728\u6d4b\u8bd5\u4e2d\u4f7f\u7528\u6a21\u62df\u7684 DAO \u5b9e\u73b0\uff0c\u800c\u4e0d\u662f\u4f9d\u8d56\u4e8e\u5b9e\u9645\u7684\u6570\u636e\u5e93\u8fde\u63a5\u3002\n<\/li>\n
  4. \n\u7b80\u5316\u4e8b\u52a1\u7ba1\u7406\uff1a<\/strong> Spring \u7684 DAO \u652f\u6301\u58f0\u660e\u5f0f\u4e8b\u52a1\u7ba1\u7406\uff0c\u901a\u8fc7\u6ce8\u89e3\u6216\u914d\u7f6e\u6587\u4ef6\u53ef\u4ee5\u5b9a\u4e49\u4e8b\u52a1\u7684\u8fb9\u754c\u3002\u8fd9\u4f7f\u5f97\u5728\u6570\u636e\u8bbf\u95ee\u5c42\u4e2d\u8fdb\u884c\u4e8b\u52a1\u7ba1\u7406\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\u3002\n<\/li>\n<\/ol>\n

    \u5728 Spring \u4e2d\uff0cDAO \u7684\u5b9e\u73b0\u901a\u5e38\u4f1a\u4f7f\u7528 JDBC \u6216\u8005 Spring \u7684 ORM \u6846\u67b6\uff08\u5982Hibernate\u3001MyBatis\uff09\u6765\u5b9e\u73b0\u6570\u636e\u7684\u5b58\u53d6\u3002Spring \u63d0\u4f9b\u4e86\u4e00\u4e9b\u652f\u6301\u548c\u6a21\u677f\u7c7b\uff08\u5982JdbcTemplate<\/code>\uff09\uff0c\u7b80\u5316\u4e86\u6570\u636e\u8bbf\u95ee\u7684\u4ee3\u7801\uff0c\u540c\u65f6\u63d0\u4f9b\u4e86\u5bf9\u4e0d\u540c\u6570\u636e\u6e90\u7684\u7edf\u4e00\u8bbf\u95ee\u65b9\u5f0f\u3002<\/p>\n

    \u4e00\u4e2a\u7b80\u5355\u7684 Spring DAO \u793a\u4f8b\uff1a<\/p>\n

    public interface UserDao {\n    User getUserById(Long id);\n    void saveUser(User user);\n}\n\npublic class JdbcUserDao implements UserDao {\n    private JdbcTemplate jdbcTemplate;\n\n    public JdbcUserDao(DataSource dataSource) {\n        this.jdbcTemplate = new JdbcTemplate(dataSource);\n    }\n\n    @Override\n    public User getUserById(Long id) {\n        \/\/ \u4f7f\u7528 JdbcTemplate \u6267\u884c SQL \u67e5\u8be2\n        \/\/ ...\n        return user;\n    }\n\n    @Override\n    public void saveUser(User user) {\n        \/\/ \u4f7f\u7528 JdbcTemplate \u6267\u884c SQL \u63d2\u5165\n        \/\/ ...\n    }\n}\n<\/code><\/pre>\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cUserDao<\/code> \u662f DAO \u63a5\u53e3\uff0cJdbcUserDao<\/code> \u662f\u5176\u5b9e\u73b0\u7c7b\uff0c\u4f7f\u7528 JdbcTemplate<\/code> \u7b80\u5316\u4e86\u5bf9\u6570\u636e\u5e93\u7684\u8bbf\u95ee\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u4f7f\u6570\u636e\u8bbf\u95ee\u5c42\u7684\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u3001\u53ef\u7ef4\u62a4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728 Spring \u4e2d\uff0cDAO\uff08Data Access Object\uff09\u662f\u4e00\u79cd\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u7528\u4e8e\u5c06\u6570\u636e\u5b58\u53d6\u4ee3\u7801\u4e0e\u4e1a\u52a1\u903b […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-11911","post","type-post","status-publish","format-standard","hentry","category-spring"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11911","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=11911"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11911\/revisions"}],"predecessor-version":[{"id":37203,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11911\/revisions\/37203"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11911"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}