ajax向后台发送数据:
①post方式
ajax:
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@app .route( "/find_worldByName" ,methods = [ 'POST' ]) type : 'post' , data:{ 'cname' :cname, 'continent' :continent}, 这是post方式传值 那么在后台接收就是:(使用request的form方法) continent = request.form.get( "continent" ) cname = request.form.get( "cname" ) |
②get方式(url参数)
使用request的values方法
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使用request的values方法 data:{ 'cname' :cname, 'continent' :continent}, name = request.values.get( "cname" ) |
总结:
这两种的区别就是数据在ajax data里的发送方式不同(get和post),所以在后台接收的时候也会不同。
使用request.form.get 方式获取的是一个json字符串(在这个方法会自动转化json对象,可以直接用key访问)
使用request.values.get 方式获取的是通过url传递的get参数
下面的代码是整个流程实现:ajax:
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/ / 查询js function find_res(){ var cname; var continent; / / $.ajax / / ({ / / method: "post" , / / url: "http://localhost:8080/PycharmProjects/Cov/templates/world.html?_ijt=q6ulfhihrfp8rqkl8id73svio3" , / / success:function(data) / / { / / / / form表单数据的转化,转化成[ { name: , value: },{ name: , value: } ] / / all = $( '#find_value' ).serializeArray() / / / / console.log( all [ 'cname' ]) / / console.log( all [ 0 ]) / / cname = all [ 0 ][ 'value' ] / / alert(cname) / / } / / }) cname = document.getElementById( "cname" ).value continent = document.getElementById( "continent" ).value console.log(cname + continent) / / alert( "表单数据: " + "国家:" + cname + "大洲:" + continent) $.ajax ({ / / sync:true, url: "/find_worldByName" , / / type : 'post' , data:{ 'cname' :cname, 'continent' :continent}, success:function (data) { / / alert( "!!!" ) table_data = data.data; for (var i = 0 ;i<table_data.length;i + + ) { / / console.log(table_data[i]); } var appendHTML = ""; if ($( ".map-table tbody tr" ).length> 0 ){ $( ".map-table tbody tr" ).remove(); } / / alert( "list长度:" + table_data.length) for (var i = 0 ; i<table_data.length; i + + ) { / / 分割日期字符串 strdt = table_data[i][ 1 ].split( " " ); strdt = strdt[ 0 ] + strdt[ 1 ] + strdt[ 2 ] + strdt[ 3 ] appendHTML = "<tr align='center' style='color:aquamarine;'><td>" + strdt + "</td><td>" + table_data[i][ 2 ] + "</td><td>" + table_data[i][ 5 ] + "</td><td>" + table_data[i][ 8 ] + "</td><td>" + table_data[i][ 9 ] + "</td><td>" + table_data[i][ 4 ] + "</td><td>" + (i + 1 ) + "</td></tr>" ; $( ".map-table tbody" ).append(appendHTML); } } }) } |
前台html:
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<table align= "center" style= "margin:3px" cellspacing= "7px" > <form id= "find_value" > <label><font color= "#ff7f50" >输入国家:</font></label> <input id= "cname" type= "text" name= "cname" placeholder= "" value= "" > <label><font color= "#ff7f50" >输入大洲:</font></label> <input id= "continent" type= "text" name= "continent" placeholder= "" value= "" > <input type= "button" value= "查询" onclick= "find_res()" > <input type= "reset" value= "重置" > </form> <thead> <tr style= "color: #FFB6C1" > <th>时间</th> <th>国家</th> <th>累计确诊</th> <th>累计治愈</th> <th>累计死亡</th> <th>现存确诊</th> <th>排名</th> </tr> </thead> <tbody id= "bd_data" > </tbody> </table> |
Python flask路由:
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@app .route( "/find_worldByName" ) def find_worldByName(): #获取用户传来的数据 # jsondata = json.loads(request.form.get('jsondata')) res = [] #get方式 cname = request.values.get( "cname" ) continent = request.values.get( "continent" ) #post方式 # continent = request.form.get("continent") # cname = request.form.get("cname") # print(cname+continent) res = utils.find_worldByName(cname,continent) # res = utils.find_worldByName("美国", "") # print(res) return jsonify({ "data" : res}) |
后台获取数据库数据:
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def find_worldByName(c_name,continent): print (c_name) print (continent) sql = " SELECT * FROM world WHERE 1=1 " if (c_name! = None ): sql = sql + "AND ( c_name LIKE '%" + c_name + "%' )" if (continent! = None ): sql = sql + " AND ( continent LIKE '%" + continent + "%') " sql = sql + " AND dt=(SELECT dt FROM world order by dt desc limit 1) order by confirm desc " # "AND continent LIKE '%%%%%s%%%%'" \ # " order by dt desc " %(c_name,continent) # sql_temp = " SELECT * FROM world WHERE c_name LIKE '%"+c_name+"%' " res = query(sql) list = [] for i in res: # print(i) list .append(i) return list ; def query(sql, * args): """ 通用封装查询 :param sql: :param args: :return:返回查询结果 ((),()) """ conn , cursor = get_conn() print (sql) cursor.execute(sql) res = cursor.fetchall() close_conn(conn , cursor) return res |
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原文链接:https://www.cnblogs.com/rainbow-1/archive/2021/04/11/14643706.html