Ajax 局部刷新
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2022-06-17 11:51:07
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通过button按钮刷新页面数据:
1.前台配置jsp和js:
1.1 在<head>标签之前添加
<%
String path = request.getContextPath();
%>
1.2 添加应用访问路径
<script type="text/javascript"> var appPath = '<%=path%>'; </script>
1.3 <body>标签内容
<p>Welcome to the site <b id='boldStuff'>dude</b> </p>
<input type='button' onclick='getInfo()' value='Change Text'/>
1.4 js方法
//struts request function getInfo() { var xhr = getXHR(); xhr.open("POST", appPath+"/queryAction.do?method=getPageDetailInfo", true); alert(appPath); xhr.onreadystatechange = function() { if (xhr.readyState == 4) { var empInfo = xhr.responseText; changeText(empInfo); } } xhr.send(); } //ajax request function getXHR() { try { return new XMLHttpRequest(); } catch(e) { try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch(e) { return new ActiveXObject("Msxml2.XMLHTTP"); } } } //change data function changeText(html){ var html = '<table><tr><td>123</td><td>456</td></tr><tr><td>789</td><td>0000</td></tr></table>'; document.getElementById('boldStuff').innerHTML = html; }
2.后台数据响应
/**
*
* {ajax局部数据请求}
* @param mapping
* @param form
* @param request
* @param response
* @return
* @author:王传对 [email protected]
* @throws IOException
*/
public ActionForward getPageDetailInfo(ActionMapping mapping,ActionForm form,HttpServletRequest request,
HttpServletResponse response) throws IOException{
String resultHTMLString = "<table border=\"1\">";
for(int i = 0;i<3;i++){
resultHTMLString += "<tr><td>"+1+"</td><td>"+2+"</td></tr>";
}
resultHTMLString += "</table>";
JSONObject obj = new JSONObject();
obj.put("resultHTMLString1", resultHTMLString);
obj.put("resultHTMLString2", resultHTMLString);
response.getWriter().write(obj.toString());
return null;
}
3.Struts相关配置
<action type="**.QueryAction" parameter="method" scope="request" path="/queryAction" name="qeuryForm"> <forward name="success" path="/**.jsp" /> <forward name="fail" path="/**.jsp" /> </action>
最后在web.xml加载struts配置,启动工程,效果如下:
Onclick之前:
Onclick之后:
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