{"id":17712,"date":"2023-02-20T16:43:38","date_gmt":"2023-02-20T08:43:38","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=17712"},"modified":"2023-02-20T16:44:40","modified_gmt":"2023-02-20T08:44:40","slug":"a%e7%ae%97%e6%b3%95%e5%92%8ca%e7%ae%97%e6%b3%95%e7%9a%84%e5%8c%ba%e5%88%ab%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/17712.html","title":{"rendered":"A\u7b97\u6cd5\u548cA*\u7b97\u6cd5\u7684\u533a\u522b\u662f\u4ec0\u4e48"},"content":{"rendered":"\n
\n

A\u7b97\u6cd5\u548cA*\u7b97\u6cd5\u7684\u533a\u522b\u662f\uff1aA\u7b97\u6cd5\u7531f(n)=g(n)+h(n)\u4fe9\u4e2a\u56e0\u7d20\u51b3\u5b9a\uff0cg(n)\u662f\u8fd9\u4e00\u6b65\u7684\u4ee3\u4ef7\u51fd\u6570,h(n)\u662f\u8fd9\u4e00\u6b65\u7684\u9884\u4f30\u51fd\u6570\uff1b\u5bf9\u4e8eA*\u7b97\u6cd5\u6765\u8bf4\uff0c\u8bc4\u5224\u51fd\u6570\u4e5f\u662ff(n)=g\u2217(n)+h\u2217(n)\u8fd9\u4e2a\uff0c\u53ea\u4e0d\u8fc7\u52a0\u4e86\u7ea6\u675f\u6761\u4ef6\uff0cg\u2217(n)>0\uff0ch\u2217(n)<=\u4efb\u610fh(n)\u3002<\/p>\n<\/blockquote>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u4e00\u3001A\u7b97\u6cd5\u548cA*\u7b97\u6cd5\u7684\u533a\u522b<\/strong><\/h2>\n\n\n\n

A\u7b97\u6cd5\u7531f(n)=g(n)+h(n)\u4fe9\u4e2a\u56e0\u7d20\u51b3\u5b9a\uff0cg(n)\u662f\u8fd9\u4e00\u6b65\u7684\u4ee3\u4ef7\u51fd\u6570,h(n)\u662f\u8fd9\u4e00\u6b65\u7684\u9884\u4f30\u51fd\u6570\uff1b\u5bf9\u4e8eA*\u7b97\u6cd5\u6765\u8bf4\uff0c\u8bc4\u5224\u51fd\u6570\u4e5f\u662ff(n)=g\u2217(n)+h\u2217(n)\u8fd9\u4e2a\uff0c\u53ea\u4e0d\u8fc7\u52a0\u4e86\u7ea6\u675f\u6761\u4ef6\uff0cg\u2217(n)>0\uff0ch\u2217(n)<=\u4efb\u610fh(n)\u3002<\/p>\n\n\n\n

\u4ee5\u4e0a\u53ea\u4e0d\u8fc7\u662f\u5b9a\u4e49\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u5b9e\u4f8b\u6765\u8bf4\uff0ch(n)\u5f88\u591a\u79cd\uff0ch(n)\u53ea\u662f\u4f30\u503c\u51fd\u6570\u7684\u4e00\u4e2a\u96c6\u5408\uff0c\u6709\u5404\u79cd\u65b9\u6cd5h1(n)h2(n)h3(n)\u2026\uff0c\u53d6\u5176\u4e2d\u4efb\u610f\u4e00\u4e2a\u65b9\u6cd5\u5e26\u5165\u4e0a\u8ff0\u516c\u5f0f\uff0c\u7ec4\u6210\u8bc4\u5224\u51fd\u6570\uff0c\u90fd\u662fA\u7b97\u6cd5\u7684\u5b9e\u73b0\uff0c\u73b0\u5728\u53d6\u4ece\u96c6\u5408\u4e2d\u4e00\u4e2a\u51fd\u6570h\u2217(n)\uff0c\u4f7f\u5f97\u5b83\u6bd4\u96c6\u5408\u4e2d\u4efb\u610f\u7684\u51fd\u6570\u90fd\u4f18\u5f02\uff0c\u8fd9\u6837\u7684\u7b97\u6cd5\u53ebA*\u7b97\u6cd5\u3002\u4e5f\u5c31\u662fA*\u7b97\u6cd5\u662f\u4f18\u5f02\u7684A\u7b97\u6cd5\uff0c\uff08\u56e0\u4e3a\u4f30\u503c\u51fd\u6570\u4f18\u5f02\uff09\u3002<\/p>\n\n\n\n

A<\/strong>\u641c\u7d22\u7b97\u6cd5<\/strong><\/h3>\n\n\n\n

\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u516b\u6570\u7801\u7684\u4f8b\u5b50\u6765\u89e3\u91caA\u641c\u7d22\u7b97\u6cd5\u3002<\/p>\n\n\n\n

\u95ee\u9898\u63cf\u8ff0\uff1a<\/p>\n\n\n\n

3\u00d73\u4e5d\u5bab\u68cb\u76d8\uff0c\u653e\u7f6e\u6570\u7801\u4e3a1 -8\u76848\u4e2a\u68cb\u724c\uff0c\u5269\u4e0b\u4e00\u4e2a\u7a7a\u683c\uff0c\u53ea\u80fd\u901a\u8fc7\u68cb\u724c\u5411\u7a7a\u683c\u7684\u79fb\u52a8\u6765\u6539\u53d8\u68cb\u76d8\u7684\u5e03\u5c40\u3002<\/p>\n\n\n\n

\u8981\u6c42\uff1a\u6839\u636e\u7ed9\u5b9a\u521d\u59cb\u5e03\u5c40\uff08\u5373\u521d\u59cb\u72b6\u6001\uff09\u548c\u76ee\u6807\u5e03\u5c40\uff08\u5373\u76ee\u6807\u72b6\u6001\uff09\uff0c\u5982\u4f55\u79fb\u52a8\u68cb\u724c\u624d\u80fd\u4ece\u521d\u59cb\u5e03\u5c40\u5230\u8fbe\u76ee\u6807\u5e03\u5c40\uff0c\u627e\u5230\u5408\u6cd5\u7684\u8d70\u6b65\u5e8f\u5217\u3002<\/p>\n\n\n\n

\u95ee\u9898\u8ba8\u8bba\uff1a<\/p>\n\n\n\n

A\u641c\u7d22\u7b97\u6cd5\u5982\u4f55\u89e3\u51b3\u516b\u6570\u7801\u95ee\u9898\u5462\uff1f\u8fd8\u8bb0\u5f97\u542f\u53d1\u5f0f\u7b97\u6cd5\u79bb\u4e0d\u5f00\u4f30\u4ef7\u51fd\u6570\uff08f(x)=g(x)+h(x)\uff09\uff0c\u90a3\u4e48\u5bf9\u4e8e\u516b\u6570\u7801\u95ee\u9898\u6211\u4eec\u8d4b\u4e88\u4f30\u4ef7\u51fd\u6570\u5b9e\u9645\u610f\u4e49\uff0cg(x)\u662f\u5f53\u524d\u88ab\u8003\u5bdf\u548c\u6269\u5c55\u7684\u8282\u70b9n\u5728\u641c\u7d22\u56fe\u4e2d\u7684\u8282\u70b9\u6df1\u5ea6\uff0ch(x)\u662f\u8282\u70b9X\u4e0e\u76ee\u6807\u72b6\u6001Sg\u76f8\u6bd4\u8f83\uff0c\u4e0d\u5728\u76ee\u6807\u4f4d\u7684\u68cb\u724c\u4e2a\u6570\uff08\u4e0d\u5305\u542b\u7a7a\u683c\uff09\u3002<\/p>\n\n\n\n

\u90a3\u4e48\u521d\u59cb\u72b6\u6001\u7684f(x)=0+4=4\u3002<\/p>\n\n\n\n

\u5728\u89e3\u51b3\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u8fd8\u8981\u501f\u52a9OPEN\u8868\uff0cCLOSE\u8868\u3002<\/p>\n\n\n\n

OPEN\u8868\u4e2d\u5b58\u653e\u8fd8\u672a\u6269\u5c55\u7684\u8282\u70b9\uff0cCLOSE\u8868\u4e2d\u5b58\u653e\u5df2\u6269\u5c55\u7684\u8282\u70b9\u3002<\/p>\n\n\n\n

\u89e3\u9898\u6d41\u7a0b\uff1a<\/p>\n\n\n\n

\u5c06\u521d\u59cb\u8282\u70b9\u88c5\u5165OPEN\u8868<\/p>\n\n\n\n

\u5982\u679cOPEN\u8868\u4e3a\u7a7a\uff0c\u5219\u5931\u8d25\uff0c\u9000\u51fa\uff1b\u5426\u5219\uff0c\u53d6\u51faOPEN\u8868\u4e2d\u540d\u5217\u524d\u8305\u4e2a\u8282\u70b9\uff0c\u52a0\u5165\u5230CLOSE\u8868\u4e2d\u3002<\/p>\n\n\n\n

\u5982\u679c\u8282\u70b9\u662f\u76ee\u6807\u8282\u70b9\uff0c\u5219\u6210\u529f\uff0c\u9000\u51fa\u3002<\/p>\n\n\n\n

\u5982\u679c\u8282\u70b9\u53ef\u6269\u5c55\uff0c\u5c06\u8282\u70b9\u7684\u6269\u5c55\u8282\u70b9\u52a0\u5165\u5230OPEN\u8868\u4e2d\uff0c\u5c06OPEN\u8868\u6309\u7167\u4f30\u4ef7\u51fd\u6570\u7531\u5c0f\u5230\u5927\u6392\u5217\uff1b<\/p>\n\n\n\n

\u5426\u5219\u8df3\u8f6c\u7b2c2\u6b65\u3002<\/p>\n\n\n\n

A*<\/strong>\u641c\u7d22\u7b97\u6cd5<\/strong><\/h3>\n\n\n\n

\u6211\u4eec\u540c\u6837\u7528\u516b\u6570\u7801\u95ee\u9898\u6765\u89e3\u91caA* \u7b97\u6cd5\u3002<\/p>\n\n\n\n

A*\u7b97\u6cd5\u4e2d\u4f30\u4ef7\u51fd\u6570\u7684\u5b9a\u4e49\uff1ag(x)\u662f\u5f53\u524d\u88ab\u8003\u5bdf\u548c\u6269\u5c55\u7684\u8282\u70b9n\u5728\u641c\u7d22\u56fe\u4e2d\u7684\u8282\u70b9\u6df1\u5ea6\uff0ch(x)\u662f\u8282\u70b9X\u4e0e\u76ee\u6807\u72b6\u6001Sg\u76f8\u6bd4\u8f83\uff0c\u6bcf\u4e2a\u9519\u4f4d\u68cb\u724c\u5728\u5047\u8bbe\u4e0d\u53d7\u963b\u62e6\u7684\u60c5\u51b5\u4e0b\uff0c\u79fb\u52a8\u5230\u76ee\u6807\u72b6\u6001\u76f8\u5e94\u4f4d\u7f6e\u6240\u9700\u79fb\u52a8\u6b21\u6570\u7684\u603b\u548c\uff08\u4e0d\u5305\u542b\u7a7a\u683c\uff09\u3002<\/p>\n\n\n\n

A*\u7b97\u6cd5\u6bd4A\u7b97\u6cd5\u66f4\u6709\u6548\u7387\u3002<\/p>\n\n\n\n

\u5ef6\u4f38\u9605\u8bfb\uff1a<\/strong><\/p>\n\n\n\n

\u4e8c\u3001JavaBean\u7684\u4f7f\u7528<\/strong><\/h2>\n\n\n\n

\u5728jsp\u4e2d\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u52a8\u4f5c\u6807\u7b7e\u6765\u8bbf\u95eeJavaBean\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u811a\u672c\u4ee3\u7801\u8bbf\u95ee\uff0c\u5728\u8fd9\u91cc\u6211\u4eec\u4ecb\u7ecd\u540d\u5217\u524d\u8305\u79cd\u3002<\/p>\n\n\n\n

\u4e3b\u8981\u6709\u4e09\u79cd\u52a8\u4f5c\u6807\u7b7e<\/p>\n\n\n\n

    \n
  • <jsp:useBean>\uff1a\u58f0\u660e\u5e76\u521b\u5efa\u5bf9\u8c61\u3002<\/li>\n\n\n\n
  • <jsp:setProperty>\uff1a\u8bbe\u7f6e\u6307\u5b9a\u5c5e\u6027\u7684\u503c\u3002<\/li>\n\n\n\n
  • <jsp:getProperty>\uff1a\u83b7\u53d6\u6307\u5b9a\u5c5e\u6027\u7684\u503c\u3002<\/li>\n<\/ul>\n\n\n\n

    \u4f7f\u7528\u7684\u65f6\u5019\uff0c\u8fd8\u8981\u6ce8\u610f\u4ed6\u4eec\u7684\u58f0\u660e\u683c\u5f0f\uff1a<\/p>\n\n\n\n

    <jsp:useBean id=”\u5bf9\u8c61\u540d” class=”\u7c7b\u540d” scope=”\u6709\u6548\u8303\u56f4”\/><\/p>\n\n\n\n

    <jsp:setProperty name=” \u5bf9\u8c61\u540d” property=”\u5c5e\u6027\u540d” value=”\u6307\u5b9a\u503c”\/><\/p>\n\n\n\n

    <jsp:getProperty name=” \u5bf9\u8c61\u540d” property=” \u5c5e\u6027\u540d”\/><\/p>\n\n\n\n

    \u6211\u4eec\u63a5\u7740\u4e0a\u9762\u7684\u4f8b\u5b50\u518d\u63a5\u7740\u4e3e\u51e0\u4e2a\u4f8b\u5b50\u3002<\/p>\n\n\n\n

    <jsp:useBean id=”user1″ class=”beans.User” scope=”session”\/><\/p>\n\n\n\n

    \u8fd9\u53e5\u8bdd\u7684\u610f\u601d\u662f\uff0c\u5b9a\u4e49\u4e00\u4e2aUser\u7c7b\u7684\u5bf9\u8c61user1\uff0c\u8303\u56f4\u662fsession\u3002<\/p>\n\n\n\n

    \u7c7b\u540d\u5fc5\u987b\u4f7f\u7528\u5b8c\u5168\u9650\u5b9a\u7c7b\u540d\u3002<\/p>\n\n\n\n

    Scope\u5c5e\u6027\u6709page, requese, session, application\u56db\u4e2a\u53ef\u9009\u503c\uff0c\u5206\u522b\u4ee3\u8868\u9875\u9762\uff0c\u8bf7\u6c42\uff0c\u4f1a\u8bdd\uff0c\u5e94\u75284\u79cd\u8303\u56f4\u3002<\/p>\n\n\n\n

    <jsp:setProperty name=”user1″ property=”name” value=”\u82cd\u4e95\u7a7a”\/><\/p>\n\n\n\n

    \u8fd9\u53e5\u8bdd\u7684\u610f\u601d\u662f\uff0c\u8bbe\u5b9auser1\u5bf9\u8c61\u7684name\u5c5e\u6027\u503c\u4e3a”\u82cd\u4e95\u7a7a”\u3002<\/p>\n\n\n\n

    <jsp:setProperty>\u8fd8\u6709\u51e0\u79cd\u53d8\u578b\uff1a<\/p>\n\n\n\n

      \n
    1. <jsp:setProperty name=” beanname ” property=” propertyname” \/><\/li>\n\n\n\n
    2. <jsp:setProperty name=” beanname” property=” propertyname” param=” paramname”\/><\/li>\n\n\n\n
    3. <jsp:setProperty name=” beanname” property=”*” \/><\/li>\n<\/ol>\n\n\n\n

      \u8fd9\u51e0\u79cd\u53d8\u578b\u4e3b\u8981\u5904\u7406form\u8868\u5355\u63d0\u4ea4\u65f6\u7684\u5c5e\u6027\u8d4b\u503c\u3002<\/p>\n\n\n\n

        \n
      1. \u5c06propertyname\u7684\u503c\u63d0\u4ea4\u7ed9beanname\u4e2d\u7684\u5c5e\u6027\u540d\u79f0\u76f8\u540c\u7684\u5c5e\u6027\u3002<\/li>\n\n\n\n
      2. \u5c06\u8bf7\u6c42\u53c2\u6570\u540d\u79f0\u4e3aparamname\u7684\u503c\u63d0\u4ea4\u7ed9propertyname\u5c5e\u6027\u3002<\/li>\n\n\n\n
      3. \u5c06\u6240\u6709\u7684\u5c5e\u6027\u4e0e\u8bf7\u6c42\u53c2\u6570\u5173\u8054\uff0c\u5b9e\u73b0\u81ea\u52a8\u590d\u5236\u5e76\u81ea\u52a8\u8f6c\u6362\u6570\u636e\u7c7b\u578b\u3002<\/li>\n<\/ol>\n\n\n\n

        \u4ee5\u4e0a\u5c31\u662f\u5173\u4e8eA\u7b97\u6cd5\u548cA*\u7b97\u6cd5\u7684\u533a\u522b\u7684\u5185\u5bb9\u5e0c\u671b\u5bf9\u5927\u5bb6\u6709\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"A\u7b97\u6cd5\u548cA*\u7b97\u6cd5\u7684\u533a\u522b\u662f\uff1aA\u7b97\u6cd5\u7531f(n)=g(n)+h(n)\u4fe9\u4e2a\u56e0\u7d20\u51b3\u5b9a\uff0cg(n)\u662f\u8fd9\u4e00\u6b65\u7684\u4ee3\u4ef7\u51fd\u6570,h(n […]","protected":false},"author":1,"featured_media":17713,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/17712"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=17712"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/17712\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/17713"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=17712"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=17712"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=17712"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}