{"id":5442,"date":"2016-10-14T09:28:24","date_gmt":"2016-10-14T01:28:24","guid":{"rendered":"https:\/\/sdeno.com\/?p=5442"},"modified":"2016-10-14T10:19:15","modified_gmt":"2016-10-14T02:19:15","slug":"node-js%e5%88%86%e9%a1%b5","status":"publish","type":"post","link":"https:\/\/sdeno.com\/?p=5442","title":{"rendered":"node.js\u5206\u9875"},"content":{"rendered":"

express\u5206\u9875\u529f\u80fd\uff0c\u4e4b\u524d\u4e5f\u5199\u8fc7\u7c7b\u4f3c\u7684php\u5206\u9875\u529f\u80fd\u300aphp\u7b80\u5355\u5206\u9875<\/a>\u300b<\/p>\n

\u8fd9\u91cc\u4e5f\u505a\u4e86\u4e00\u4e0bnode.js\u5206\u9875\uff0c\u5199\u6cd5\u90fd\u4e0d\u4e00\u6837\uff0c\u4f46\u601d\u8def\u57fa\u672c\u90fd\u76f8\u540c\uff0c\u8fd9\u91cc\u603b\u7ed3\u5f52\u6765\u4e00\u4e0b\u4e0d\u8fc7\u8fd0\u7528\u54ea\u91cc\u8bed\u8a00\u90fd\u901a\u7528\u3002<\/p>\n

\u6548\u679c\u5982\u56fe\uff1a<\/p>\n

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

 <\/p>\n

\u6559\u7a0b\u90fd\u4ee5\u4e0a\u56fe\u6548\u679c\u4e3a\u51c6\u3002<\/p>\n

1\uff0c\u201c\u9996\u9875\u201d\u529f\u80fd\u7b80\u5355\uff0c\u201c\u4e0a\u4e00\u9875\u201d\u529f\u80fd\u5728\u83b7\u53d6\u5f53\u524d\u9875\u7801\u7684\u65f6\u51cf\u53bb1\u5c31\u884c\uff0c\u201c\u4e0b\u4e00\u9875\u201d\u529f\u80fd\u5728\u83b7\u53d6\u5f53\u524d\u9875\u57fa\u7840\u4e0a\u52a01\u3002<\/p>\n

2\uff0c\u201c\u5c3e\u9875\u201d\uff0c\u603b\u5171\u6570\u636e\u6761\u6570 \u00a0\u9664\u4ee5 \u00a0\u4e00\u9875\u8981\u663e\u793a\u7684\u6761\u6570 \u5c31\u5f97\u5230\u4e86\u4e00\u5171\u591a\u5c11\u9875\u3002\u5f97\u51fa\u7684\u7ed3\u679c\u6709\u4f59\u6570\uff0c\u8981\u5411\u6574\u6570\u52a01\u3002<\/p>\n

3\uff0c\u201c\u8df3\u8f6c\u5230\u67d0\u9875\u201d\u529f\u80fd\u5229\u7528js\u7684window.location.href\u529f\u80fd\u5373\u53ef\u3002<\/p>\n

4\uff0c\u9875\u7801\u7684\u663e\u793a\u548c\u7701\u7565\u53f7\u663e\u793a\uff1a<\/p>\n

<\/div>
<\/div><\/div><\/div>\"node_page0\"<\/figure><\/a>\n

(1)\u521d\u59cb\u5316\u72b6\u6001\u8981\u5224\u65ad\u6570\u636e\u6570\u5426\u6ee1\u8db3\u4e865\u9875\uff0c\u5982\u679c\u6709\u90a3\u4e48\u5c31\u75285\u540e\u9762\u7684\u7701\u7565\u53f7\uff0c\u5982\u679c\u6b63\u597d\u662f5\u9875\u6216\u8005\u5c0f\u4e8e5\u9875\u5219\u6ca1\u6709\u3002<\/p>\n

(2)\u70b9\u51fb\u5927\u4e8e3\u7684\u9875\u7801\u65f6\u624d\u5f00\u59cb\u5224\u65ad\uff0c\u4ee5\u4e0b\u7684\u5224\u65ad\u90fd\u8981\u4ee5\u5f53\u524d\u7684\u9875\u7801\u4e3a\u57fa\u51c6<\/span>\u6765\u5224\u65ad\u3002<\/p>\n

<\/div>
<\/div><\/div><\/div>\"node_page2\"<\/figure><\/a>\n

\u5f53\u70b9\u51fb5\u65f6\uff0c\u5224\u65ad\u4ec0\u4e48\u60c5\u51b5\u4e0b\u4f1a\u51fa\u73b0\u5de6\u8fb9\u7701\u7565\u53f7\u548c\u53c8\u8fb9\u7701\u7565\u53f7\u5982\uff1a\u00a0(\u5f53\u524d\u9875-3)>0 && \u5f53\u524d\u9875+2<\u603b\u9875\u7801<\/p>\n

 <\/p>\n

<\/div>
<\/div><\/div><\/div>\"node_page3\"<\/figure><\/a>\n

\u63a5\u7740\u5224\u65ad\u53ea\u663e\u793a\u5de6\u7701\u7565\u53f7\u7684\u51fa\u73b0\uff0c\u5f53\u524d\u9875+2==last_page<\/p>\n

\u8fd9\u65f6\u5019\u5982\u679c\u70b9\u4e867\u6216\u80058\u9875\u65f6\u5c31\u4f1a\u51fa\u9519\uff0c \u8fd9\u65f6\u5019\u5e94\u8be5\u5224\u65ad\uff1a\u603b\u9875\u7801-2<\u5f53\u524d\u9875 && \u5f53\u524d\u9875<=\u603b\u9875\u7801<\/p>\n

 <\/p>\n

———————————————————————————————-<\/p>\n

\u4e0b\u9762\u8d34\u51fa\u57fa\u4e8e jade+mongodb\u5199\u7684\u5206\u9875<\/p>\n

\u524d\u53f0\u903b\u8f91\uff1a<\/p>\n

div<\/span>#page\r\n<\/span>a<\/span>(href<\/span>=<\/span>\"\/\"<\/span>) \u9996\u9875\r\n<\/span>if <\/span>current_page<\/span>==<\/span>1\r\n<\/span>a<\/span>(href<\/span>=<\/span>\"\/1\"<\/span>) \u4e0a\u4e00\u9875\r\n<\/span>else\r\n<\/span>a<\/span>(href<\/span>=<\/span>\"\/#{current_page-1}\"<\/span>) \u4e0a\u4e00\u9875\r\n<\/span>if <\/span>last_page<\/span><=<\/span>5\r\n<\/span>- for <\/span>(var <\/span>i <\/span>= <\/span>1<\/span>; i <\/span><= <\/span>5<\/span>; i<\/span>++<\/span>)\r\n        a<\/span>(href<\/span>=<\/span>\"#{<\/span>i<\/span>}\"<\/span>) #{<\/span>i<\/span>}\r\n<\/span>else\r\n<\/span>      if <\/span>current_page<\/span><=<\/span>3\r\n<\/span>- for <\/span>(var <\/span>i <\/span>= <\/span>1<\/span>; i <\/span><= <\/span>5<\/span>; i<\/span>++<\/span>)\r\n        a<\/span>(href<\/span>=<\/span>\"#{<\/span>i<\/span>}\"<\/span>) #{<\/span>i<\/span>}\r\n<\/span>span <\/span>...\r\n<\/span>if <\/span>current_page<\/span>><\/span>3\r\n<\/span>if <\/span>(current_page<\/span>-<\/span>3<\/span>)<\/span>><\/span>0 <\/span>&& <\/span>current_page<\/span>+<\/span>2<\/span><<\/span>last_page\r\n<\/span>span <\/span>...\r\n<\/span>- for <\/span>(var <\/span>i <\/span>= <\/span>current_page-<\/span>2<\/span>; i <\/span><= <\/span>current_page+<\/span>2<\/span>; i<\/span>++<\/span>)\r\n             a<\/span>(href<\/span>=<\/span>\"#{<\/span>i<\/span>}\"<\/span>) #{<\/span>i<\/span>}\r\n<\/span>span <\/span>...\r\n<\/span>if <\/span>current_page<\/span>+<\/span>2<\/span>==<\/span>last_page\r\n<\/span>span <\/span>...\r\n<\/span>- for <\/span>(var <\/span>i <\/span>= <\/span>current_page-<\/span>2<\/span>; i <\/span><= <\/span>current_page+<\/span>2<\/span>; i<\/span>++<\/span>)\r\n             a<\/span>(href<\/span>=<\/span>\"#{<\/span>i<\/span>}\"<\/span>) #{<\/span>i<\/span>}\r\n<\/span>if <\/span>last_page<\/span>-<\/span>2<\/span><<\/span>current_page <\/span>&& <\/span>current_page<\/span><=<\/span>last_page\r\n<\/span>span <\/span>...\r\n<\/span>- for <\/span>(var <\/span>i <\/span>= <\/span>last_page-<\/span>2<\/span>; i <\/span><= <\/span>last_page; i<\/span>++<\/span>)\r\n                 a<\/span>(href<\/span>=<\/span>\"#{<\/span>i<\/span>}\"<\/span>) #{<\/span>i<\/span>}\r\n<\/span>if <\/span>current_page<\/span>==<\/span>last_page\r\n<\/span>a<\/span>(href<\/span>=<\/span>\"\/#{last_page}\"<\/span>) \u4e0b\u4e00\u9875\r\n<\/span>else\r\n<\/span>a<\/span>(href<\/span>=<\/span>\"\/#{current_page+1}\"<\/span>) \u4e0b\u4e00\u9875\r\n<\/span>a<\/span>(href<\/span>=<\/span>\"\/#{last_page}\"<\/span>) \u5c3e\u9875\r\n<\/span>span <\/span>\u5171<\/span>#{<\/span>last_page<\/span>}<\/span>\u9875\r\n<\/span>| ----<\/span>\u8df3\u8f6c\u5230\u7b2c\r\n<\/span>input<\/span>(type<\/span>=<\/span>\"text\" <\/span>value<\/span>=<\/span>\"\"<\/span>)#page_num\r\n<\/span>| \u9875\r\n<\/span>button<\/span>#up_page <\/span>\u786e\u5b9a\r\n<\/span>| <br><\/span><\/pre>\n
 <\/p>\n
 <\/p>\n
\u8df3\u8f6c\u5230\u67d0\u9875\u529f\u80fd\uff1a<\/p>\n
$<\/span>('#up_page'<\/span>).click<\/span>(function <\/span>() {\r\n\r\n    if<\/span>( #{last_page}<$<\/span>('#page_num<\/span>').<\/span>val<\/span>() ){\r\n<\/span>window<\/span>.<\/span>location<\/span>.<\/span>href<\/span>='<\/span>\/'+#{last_page};\r\n    }\r\n    if<\/span>( $<\/span>('#page_num<\/span>').<\/span>val<\/span>()<=0 )\r\n<\/span>    {\r\n<\/span>window<\/span>.<\/span>location<\/span>.<\/span>href<\/span>='<\/span>\/1';\r\n    }else<\/span>{\r\n      window<\/span>.location<\/span>.href=<\/span>'\/'<\/span>+<\/span>$<\/span>('#page_num'<\/span>).val<\/span>();\r\n    }\r\n\r\n});<\/pre>\n
 <\/p>\n
\u540e\u53f0\u903b\u8f91\uff1a<\/p>\n
\/\/<\/span>\u9996\u9875\u5185\u5bb9\r\n<\/span>router<\/span>.get<\/span>('\/'<\/span>, function<\/span>(req, res, next) {\r\n\r\n\r\n    MongoClient<\/span>.connect<\/span>(DB_CONN_STR<\/span>, function<\/span>(err1, db) {\r\n        if<\/span>(err1){\r\n            console<\/span>.log<\/span>('<\/span>\u8fde\u63a5\u6570\u636e\u5e93\u5931\u8d25<\/span>'<\/span>);\r\n        }else<\/span>{\r\n\r\n\r\n            db.collection<\/span>('post'<\/span>).find<\/span>().toArray<\/span>(function <\/span>(err1,result1) {\r\n                if<\/span>(err1){\r\n                    console<\/span>.log<\/span>('<\/span>\u63d2\u5165\u6570\u636e\u5931\u8d25<\/span>'<\/span>);\r\n                }else<\/span>{\r\n\r\n\r\n                    if<\/span>(parseFloat<\/span>(req.params<\/span>.page_num<\/span>)<=<\/span>0<\/span>){\r\n                        req.params<\/span>.page_num<\/span>=<\/span>1<\/span>;\r\n                        var <\/span>num<\/span>=<\/span>parseFloat<\/span>(req.params<\/span>.page_num<\/span>);\r\n                        console<\/span>.log<\/span>('<\/span>\u6267\u884c\u4e86<\/span>-------------------'<\/span>);\r\n                    }\r\n\r\n                    if<\/span>(parseFloat<\/span>(req.params<\/span>.page_num<\/span>)>=<\/span>Math<\/span>.ceil<\/span>(((result1).length<\/span>)\/<\/span>5<\/span>)){\r\n                        req.params<\/span>.page_num<\/span>=<\/span>Math<\/span>.ceil<\/span>(((result1).length<\/span>)\/<\/span>5<\/span>);\r\n                        var <\/span>num<\/span>=<\/span>parseFloat<\/span>(req.params<\/span>.page_num<\/span>);\r\n                    }\r\n                    else<\/span>{\r\n                        var <\/span>num<\/span>=<\/span>parseFloat<\/span>(req.params<\/span>.page_num<\/span>);\r\n\r\n                    }\r\n\r\n\r\n                        db.collection<\/span>('post'<\/span>).find<\/span>({} ,{skip<\/span>:<\/span>0<\/span>,limit<\/span>:<\/span>5<\/span>, sort<\/span>: <\/span>[['_id'<\/span>,1<\/span>]]}).toArray<\/span>(function <\/span>(err2,result2) {\r\n                            if<\/span>(err2){\r\n                                console<\/span>.log<\/span>('<\/span>\u63d2\u5165\u6570\u636e\u5931\u8d25<\/span>'<\/span>);\r\n                            }else<\/span>{\r\n                                res.render<\/span>('index'<\/span>, {\r\n                                    title<\/span>: <\/span>'<\/span>\u9996\u9875<\/span>'<\/span>,\r\n                                    result<\/span>:<\/span>result2,\r\n                                    current_page<\/span>:<\/span>parseFloat<\/span>(req.params<\/span>.p<\/span>)?<\/span>parseFloat<\/span>(req.params<\/span>.p<\/span>):<\/span>1<\/span>,\r\n                                    page_total<\/span>:<\/span>result1.length<\/span>,\r\n                                    last_page<\/span>:<\/span>Math<\/span>.ceil<\/span>((result1.length<\/span>)\/<\/span>5<\/span>)\r\n                                });\r\n                            }\r\n                        });\r\n\r\n                }\r\n            });\r\n\r\n        }\r\n    });\r\n\r\n});\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\/\/<\/span>\u9996\u9875\u5185\u5bb9\r\n<\/span>router<\/span>.get<\/span>('\/:p'<\/span>, function<\/span>(req, res, next) {\r\n   \/\/ var num=parseFloat(req.params.p);\r\n<\/span>MongoClient<\/span>.connect<\/span>(DB_CONN_STR<\/span>, function<\/span>(err1, db) {\r\n        if<\/span>(err1){\r\n            console<\/span>.log<\/span>('<\/span>\u8fde\u63a5\u6570\u636e\u5e93\u5931\u8d25<\/span>'<\/span>);\r\n        }else<\/span>{\r\n\r\n\r\n            db.collection<\/span>('post'<\/span>).find<\/span>().toArray<\/span>(function <\/span>(err1,result1) {\r\n                if<\/span>(err1){\r\n                    console<\/span>.log<\/span>('<\/span>\u63d2\u5165\u6570\u636e\u5931\u8d25<\/span>'<\/span>);\r\n                }else<\/span>{\r\n\r\n                            if<\/span>(parseFloat<\/span>(req.params<\/span>.p<\/span>)<=<\/span>0<\/span>){\r\n                                req.params<\/span>.p<\/span>=<\/span>1<\/span>;\r\n                                var <\/span>num<\/span>=<\/span>parseFloat<\/span>(req.params<\/span>.p<\/span>);\r\n                                console<\/span>.log<\/span>('<\/span>\u6267\u884c\u4e86<\/span>-------------------'<\/span>);\r\n                            }\r\n\r\n                            if<\/span>(parseFloat<\/span>(req.params<\/span>.p<\/span>)>=<\/span>Math<\/span>.ceil<\/span>(((result1).length<\/span>)\/<\/span>5<\/span>)){\r\n                                req.params<\/span>.p<\/span>=<\/span>Math<\/span>.ceil<\/span>(((result1).length<\/span>)\/<\/span>5<\/span>);\r\n                                var <\/span>num<\/span>=<\/span>parseFloat<\/span>(req.params<\/span>.p<\/span>);\r\n                            }\r\n                            else<\/span>{\r\n                                var <\/span>num<\/span>=<\/span>parseFloat<\/span>(req.params<\/span>.p<\/span>);\r\n\r\n                            }\r\n\r\n                            db.collection<\/span>('post'<\/span>).find<\/span>({} ,{skip<\/span>:<\/span>(num<\/span>-<\/span>1<\/span>)*<\/span>5<\/span>,limit<\/span>:<\/span>5<\/span>, sort<\/span>: <\/span>[['_id'<\/span>,1<\/span>]]}).toArray<\/span>(function <\/span>(err2,result) {\r\n                                if<\/span>(err2){\r\n                                    console<\/span>.log<\/span>('<\/span>\u63d2\u5165\u6570\u636e\u5931\u8d25<\/span>'<\/span>);\r\n                                }else<\/span>{\r\n\r\n                                    res.render<\/span>('index'<\/span>, {\r\n                                        title<\/span>: <\/span>'<\/span>\u9996\u9875<\/span>'<\/span>,\r\n                                        result<\/span>:<\/span>result,\r\n                                        current_page<\/span>:<\/span>parseFloat<\/span>(req.params<\/span>.p<\/span>)?<\/span>parseFloat<\/span>(req.params<\/span>.p<\/span>):<\/span>1<\/span>,  \/\/<\/span>\u83b7\u53d6\u5230\u5f53\u524d\u9875\u7801\r\n<\/span>page_total<\/span>:<\/span>result.length<\/span>,     \/\/<\/span>\u603b\u6761\u6570\u636e\r\n<\/span>last_page<\/span>:<\/span>Math<\/span>.ceil<\/span>(((result1).length<\/span>)\/<\/span>5<\/span>)\r\n                                    });\r\n\r\n                                }\r\n                            });\r\n\r\n                }\r\n            });\r\n\r\n        }\r\n    });\r\n\r\n});<\/pre>\n
 <\/p>\n
\u6570\u636e\u5e93\u7ed3\u6784\u60c5\u51b5<\/p>\n
<\/div>
<\/div><\/div><\/div>\"node_page4\"<\/figure><\/a>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n","protected":false},"excerpt":{"rendered":"
express\u5206\u9875\u529f\u80fd\uff0c\u4e4b\u524d\u4e5f\u5199\u8fc7\u7c7b\u4f3c\u7684php\u5206\u9875\u529f\u80fd\u300aphp\u7b80\u5355\u5206\u9875\u300b \u8fd9\u91cc\u4e5f\u505a\u4e86\u4e00\u4e0bnode.js\u5206\u9875\uff0c\u5199 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[],"class_list":["post-5442","post","type-post","status-publish","format-standard","hentry","category-nodejs"],"_links":{"self":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/5442","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5442"}],"version-history":[{"count":0,"href":"https:\/\/sdeno.com\/index.php?rest_route=\/wp\/v2\/posts\/5442\/revisions"}],"wp:attachment":[{"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5442"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5442"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sdeno.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}