代码：
html代码：
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <link rel="stylesheet" href="styles/base.css"/> <link rel="stylesheet" href="styles/public.css"/> <script src="js/spaqQuery.js"></script> </head> <body class="bg"> <div class="main w"> <div class="title">食安查询</div> <div class="foodQuery clearfix"> <div class="foodQuery-left fl"><img src="images/foodinsurance.png" alt="食品险"/></div> <div class="foodQuery-right fl"> <ul class="query-con clearfix"> <li class="marginr"> <label>保单号：</label> <input type="text" id="policyno" value=""/> </li> <li> <label>企业名称：</label> <input type="text" id="company" value =""/> </li> <li><input class="query-btn" type="button" value="查询" onclick="doSubmit()"/></li> </ul> <br> <br> <br> <br> <div class="query-result"> <p id="queryResult">查询结果：<span>本公司在保障中、已通过食品安全检测、没有发生过理赔，获取食安险徽章</span></p> </div> </div> </div> </div> </body> </html>
js代码：
function doSubmit(){ var strPolicyno = document.getElementById("policyno").value; var strCompany = document.getElementById("company").value; if(trim(strPolicyno)==""){ alert("保单号不可为空"); } if(trim(strCompany)==""){ alert("企业名称不可为空"); } validate(strPolicyno,strCompany); } function trim(str){ //删除左右两端的空格 return str.replace(/(^s*)|(s*$)/g, ""); } var xmlHttp; function createXMLHttpRequest() { if(window.XMLHttpRequest) { xmlHttp = new XMLHttpRequest(); } else if (window.ActiveXObject) { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } } function validate(strPolicyno,strCompany) { if (strPolicyno!="" && strCompany!="") { //创建Ajax核心对象XMLHttpRequest createXMLHttpRequest(); var url = "spaqQueryAJAX.jsp?strPolicyno=" +strPolicyno + "&strCompany=" + strCompany; //设置请求方式为GET，设置请求的URL，设置为异步提交 xmlHttp.open("GET", url, true); //将方法地址复制给onreadystatechange属性 xmlHttp.onreadystatechange=callback; //将设置信息发送到Ajax引擎 xmlHttp.send(null); } } //回调函数 function callback() { //Ajax引擎状态为成功 if (xmlHttp.readyState == 4) { //HTTP协议状态为成功 if (xmlHttp.status == 200) { if (trim(xmlHttp.responseText) != "") { document.getElementById("queryResult").innerHTML = xmlHttp.responseText; }else { document.getElementById("queryResult").innerHTML = ""; } }else { alert("请求失败，错误码=" + xmlHttp.status); } } }
jsp代码，直接out输出，ajax即可接收到返回数据
<% String strPolicyno =request.getParameter("strPolicyno"); System.out.println(strPolicyno); out.print("查询成功"); %>