如何从JavaScript调用servlet

web.xml中的Servlet配置

<servlet>

<description>This is the description of my J2EE component</description>

<display-name>This is the display name of my J2EE component</display-name>

<servlet-name>DataEntry</servlet-name>

<servlet-class>com.ctn.origin.connection.DataEntry</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>DataEntry</servlet-name>

<url-pattern>/dataentry</url-pattern>

</servlet-mapping>

Javascript:

<script type="text/javascript">

function unloadEvt() {

document.location.href='/test/dataentry';

}

</script>

但是使用此javascript不能调用我的servlet。

有什么错误吗?如何调用servlet?

回答:

这可以使用ajax来完成

<script type="text/javascript">

function loadXMLDoc() {

var xmlhttp;

if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari

xmlhttp = new XMLHttpRequest();

} else {// code for IE6, IE5

xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

}

xmlhttp.onreadystatechange = function() {

if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {

document.getElementById("myDiv").innerHTML=xmlhttp.responseText;

}

}

xmlhttp.open("GET", "/testmail/dataentry", true);

xmlhttp.send();

}

</script>

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