//jsp

<script type="text/javascript" src="http://www.mamicode.com/jquery/autocomplete/jquery.autocomplete.js"></script>
<link href="http://www.mamicode.com/jquery/autocomplete/jquery.autocomplete.css" rel="stylesheet" type="text/css"/>

$(function(){
            $("#empCode").autocomplete("${pageContext.request.contextPath}/emp/empAutocomplete.action", {
    cellSeparator: "|",
    lineSeparator: "\n",
    minChars: 1,
    maxItemsToShow: 10,
    formatItem: function(row) {
     return "代码：" + row[0] + ", 姓名：" + row[1];
    },
    onItemSelect: function(li) {
     //$("#empCode").val(li.extra[0]);
    }
  }); 
      })

//java

public String empAutocomplete() throws Exception{
 
  String zjm = getRequest().getParameter("q");
  List<Employee> empList = empService.findByCode(zjm);
  HttpServletResponse response = getResponse();
  response.setContentType("text/html;charset=utf-8");
  for (Employee e : empList) {
   response.getWriter().println(e.getCode() + "|" + e.getName() + "|" + e.getOrg().getName() + "|" + e.getSex() + "|" + e.getEmail() + "|" +     e.getContactTel());
   }

return null;

}

jquery--autocomplete