{"id":941,"date":"2021-09-10T20:49:34","date_gmt":"2021-09-10T12:49:34","guid":{"rendered":"https:\/\/fireinsect.top\/?p=941"},"modified":"2021-09-10T20:49:34","modified_gmt":"2021-09-10T12:49:34","slug":"mybatis%e5%88%86%e9%a1%b5%e6%8f%92%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/fireinsect.top\/index.php\/2021\/09\/10\/mybatis%e5%88%86%e9%a1%b5%e6%8f%92%e4%bb%b6\/","title":{"rendered":"MyBatis\u5206\u9875\u63d2\u4ef6"},"content":{"rendered":"\n

MyBatis\u652f\u6301\u901a\u8fc7\u63d2\u4ef6\u6765\u5b8c\u6210\u5206\u9875\u67e5\u8be2\uff0c\u800cpagehelper<\/strong>\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u7b2c\u4e09\u65b9\u63d2\u4ef6<\/p>\n\n\n\n\n\n\n\n

\u4f9d\u8d56\uff1a<\/p>\n\n\n\n

<dependency>\n    <groupId>com.github.pagehelper<\/groupId>\n    <artifactId>pagehelper-spring-boot-starter<\/artifactId>\n    <version>1.2.13<\/version>\n<\/dependency><\/code><\/pre>\n\n\n\n
\u4f7f\u7528\u5206\u9875\u63d2\u4ef6\uff1a<\/p>\n\n\n\n
@Controller<\/strong>\npublic<\/strong> class<\/strong> UserController<\/strong> {\n\n    @Autowired<\/strong>\n    private<\/strong> UserDAO userDAO;\n\n    @GetMapping(\"\/users\")<\/strong>\n    @ResponseBody<\/strong>\n    public<\/strong> List<UserDO> getAll<\/strong>() {\n        \/\/ \u8bbe\u7f6e\u5f53\u524d\u9875\u6570\u4e3a1\uff0c\u4ee5\u53ca\u6bcf\u98753\u6761\u8bb0\u5f55<\/em>\n        Page<UserDO> page = PageHelper.startPage(1, 3).doSelectPage(() -> userDAO.findAll());\n        return<\/strong> page.getResult();\n    }\n\n}<\/code><\/pre>\n\n\n\n
\u8fd9\u91cc\u7ed3\u5408lambda\u8bed\u6cd5\uff0c\u5728 doSelectPage<\/strong>\u65b9\u6cd5\u6267\u884cMyBatis\u67e5\u8be2\u65b9\u6cd5\uff0c\u8fd4\u56de Page<\/strong> \u5bf9\u8c61\u3002<\/p>\n\n\n\n
PageHelper.startPage(1,3);<\/code> \u5176\u4e2dstartPage<\/strong><\/p>\n\n\n\n
\u901a\u8fc7\u83b7\u53d6\u7684 Page<\/strong> \u5bf9\u8c61\uff0c\u6211\u4eec\u53ef\u4ee5\uff1a<\/p>\n\n\n\n
  • getResult()<\/strong> \u83b7\u53d6\u5206\u9875\u6570\u636e<\/li>
  • getPages()<\/strong> \u83b7\u53d6\u603b\u9875\u6570<\/li>
  • getTotal()<\/strong> \u83b7\u53d6\u603b\u8bb0\u5f55\u6570<\/li>
  • getPageNum()<\/strong> \u83b7\u53d6\u5f53\u524d\u9875\u9762\u6570<\/li><\/ul>\n\n\n\n
    <\/div>\n\n\n\n
    \u4e00\u822c\u6211\u4eec\u90fd\u4f1a\u989d\u5916\u5c01\u88c5\u4e00\u4e2a\u901a\u7528\u7684\u5206\u9875\u6a21\u578b Paging<\/strong> \u7528\u4e8e\u5904\u7406\u8fd4\u56de\u503c<\/p>\n\n\n\n
    public<\/strong> class<\/strong> Paging<\/strong><R<\/strong>> implements<\/strong> Serializable<\/strong> {\n\n    private<\/strong> static<\/strong> final<\/strong> long<\/strong> serialVersionUID = 522660448543880825L;\n    \/**\n     * \u9875\u6570\n     *\/<\/em>\n    private<\/strong> int<\/strong> pageNum;\n\n    \/**\n     * \u6bcf\u9875\u6570\u91cf\n     *\/<\/em>\n    private<\/strong> int<\/strong> pageSize = 15;\n    \/**\n     * \u603b\u9875\u6570\n     *\/<\/em>\n    private<\/strong> int<\/strong> totalPage;\n\n    \/**\n     * \u603b\u8bb0\u5f55\u6570\n     *\/<\/em>\n    private<\/strong> long<\/strong> totalCount;\n\n    \/**\n     * \u96c6\u5408\u6570\u636e\n     *\/<\/em>\n    private<\/strong> List<R> data;\n\n    public<\/strong> Paging<\/strong>() {\n\n    }\n\n    public<\/strong> Paging<\/strong>(int<\/strong> pageNum, int<\/strong> pageSize, int<\/strong> totalPage, long<\/strong> totalCount, List<R> data) {\n        this<\/strong>.pageNum = pageNum;\n        this<\/strong>.pageSize = pageSize;\n        this<\/strong>.totalPage = totalPage;\n        this<\/strong>.totalCount = totalCount;\n        this<\/strong>.data = data;\n    }\n\n    \/\/ \u7701\u7565 getter\u3001setter<\/em>\n\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
    MyBatis\u652f\u6301\u901a\u8fc7\u63d2\u4ef6\u6765\u5b8c\u6210\u5206\u9875\u67e5\u8be2\uff0c\u800cpagehelper\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u7b2c\u4e09\u65b9\u63d2\u4ef6<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-941","post","type-post","status-publish","format-standard","hentry","category-6"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/941"}],"collection":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/comments?post=941"}],"version-history":[{"count":1,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/941\/revisions"}],"predecessor-version":[{"id":942,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/941\/revisions\/942"}],"wp:attachment":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/media?parent=941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/categories?post=941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/tags?post=941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}