一个ajax在netbeans下的例子.txt

NetBeans下实现ajax

  var xmlHttp; 
                         function creatXMLHttpRequest() {  
                            if (window.ActiveXObject) {  
                            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");  
                            }  
                            else if (window.XMLHttpRequest) {  
                                 xmlHttp = new XMLHttpRequest();  
                            }  
                            else {  
                                return;  
                              }  
                            } 
                          //提交部门下拉框选择内容 
                         function select_change(){ 
                              var depart = document.getElementById("form1:dropDown15").value; 
                              if(depart != ""){ 
                                     creatXMLHttpRequest(); 
                                     var url = "/HRMS/faces/employee/Page1.jsp?depart=" + depart; 
                                     xmlHttp.open("GET",url,true); 
                                     xmlHttp.onreadystatechange = showMembers; 
                                     xmlHttp.setRequestHeader("If-Modified-Since","0"); 
                                     xmlHttp.send(); 
                              }else{ 
                                  ClearOption(document.getElementById("form1:dropDown17")); 
                              } 
                         } 
                         //根据部门返回的职工列表动态加载数据 
                         function showMembers(){ 
                              if(xmlHttp.readystate == 4){ 
                                     if(xmlHttp.status == 200){ 
                                        var tmpTeam = xmlHttp.responseXML; 
                                        ClearOption(document.getElementById("form1:dropDown17")); 
                                        var arrTmp = tmpTeam.getElementsByTagName("members"); 
                                        for(var i = 0;i <arrTmp.length;i++){ 
                                            var oOption = document.createElement("option");  
                                            document.getElementById("form1:dropDown17").options.add(oOption); 
                                                oOption.innerText = arrTmp[i].childNodes[1].firstChild.data; 
                                                oOption.value = arrTmp[i].childNodes[0].firstChild.data; 
                                        } 
                                     }else{ 
                                        //alert("您请求的页面有异常"); 
                                     } 
                              }else{ 
                                  //alert("信息没有返回请等等待"); 
                              } 
                         }
后台代码：

BaseHibernateDAO teamdao = new BaseHibernateDAO(); 
        try{ 
            String teamTmp = ""; 
            String teamTmp1 = ""; 
            HttpServletRequest request = (HttpServletRequest)this.getFacesContext().getExternalContext().getRequest(); 
            String depart = request.getParameter("depart"); 
            String strcity = request.getParameter("city"); 
            if(depart != null){ 
                    HttpServletResponse res =  (HttpServletResponse)this.getFacesContext().getExternalContext().getResponse(); 
                    DepartMentServer dms = new DepartMentServer(); 
                    DbDepartMent departDB  = new DbDepartMent(); 
                    String teamsql = "select * from team where departcode='"+ depart +"'";     
                    SQLQuery teamquery = teamdao.getSession().createSQLQuery(teamsql); 
                    teamquery.addEntity(Team.class); 
                    ArrayList<Team> idlist = (ArrayList<Team>) teamquery.list(); 
                        for(int i=0;i<idlist.size();i++){ 
                            if(teamTmp == ""){ 
                                teamTmp = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\r\n" + "<member>" + "<members>" +  
                                          "<id>" + String.valueOf(idlist.get(i).getId()) + "</id>" +  
                                           "<name>" + idlist.get(i).getTeam() + "</name>"; 
                            } 
                            else{ 
                                 if(String.valueOf(idlist.get(i).getId()) != String.valueOf(idlist.get(i-1).getId())){ 
                                    teamTmp += "</members>" +  "<members>" +  
                                               "<id>" + String.valueOf(idlist.get(i).getId()) + "</id>" +  
                                               "<name>" + idlist.get(i).getTeam() + "</name>"; 
                                 }else{ 
                                     teamTmp += "<name>" + idlist.get(i).getTeam() + "</name>" ; 
                                 } 
                            } 
                        } 
                        if(idlist.size() > 0)  teamTmp += "</members>"; 
                        teamTmp += "</member>"; 
                        res.setContentType("text/xml;charset=UTF-8");  
                        res.getOutputStream().print(teamTmp); 
                        res.getOutputStream().flush(); 
                        res.notify(); 
                        res.getOutputStream().close(); 
              }