js调用后台servlet方法实例

<span style="white-space:pre">  </span> document.getElementById("sendPerson").value = SendPerson;
 document.getElementById("currentTime").value = currentTime();
 document.getElementById("message").value = message;
 document.getElementById("recvPerson").value = recvPerson;
 document.chatform.action = "ToHistoryServlet";
 document.chatform.submit();
*.html

<!--the tag below is the params to the userHistory  dml@2012.8.27-->
        <input type="hidden" name="sendPerson" id="sendPerson"> <input
            type="hidden" name="currentTime" id="currentTime"> <input
            type="hidden" name="message" id="message"> <input
            type="hidden" name="recvPerson" id="recvPerson">

public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException { www.jb51.net

    String sendPerson = request.getParameter("sendPerson");
    String recvPerson = request.getParameter("recvPerson");
    String sendTime = request.getParameter("currentTime");
    String message = request.getParameter("message");
    Message msg = new Message();
    msg.setMessage(message);
    msg.setRecvPerson(recvPerson);
    msg.setSendPerson(sendPerson);
    msg.setSendTime(sendTime);
    HistoryHandle.addMessage(msg);
}

$.ajax({
    type : "POST",
    contentType : "application/json",
    url : "ToHistoryServlet?sendPerson=" + SendPerson + "¤tTime="
            + currentTime() + "&message=" + message + "&recvPerson="
            + recvPerson,
    dataType : 'json',
    success : function(result) {
        alert(result.d);
    }
});