Jquery adds option to the drop-down list

Front-end:
 
Function load_allemployees (employee_type ){
Var url = "onLoadEmployee. do ";
Var p_data = "employee_type =" + employee_type;
DoAjaxSubmit (url, p_data, filSelect );
}
Function filSelect (data ){
$ ("# Left _"). empty ();
Var employeeArr = document. getElementById ('left _');
For (var I = 0; I <data. length; I ++)
{
Var op = document. createElement ("OPTION ");
Op. value = data [I]. user_id;
Op. innerHTML = data [I]. user_name;
EmployeeArr. appendChild (op );

}
}
Function doAjaxSubmit (p_url, p_data, p_callback ){
$. Ajax ({
Type: "POST ",
Url: p_url,
Data: p_data,
DataType: "json ",
Success: function (data ){
P_callback (data );
}
});
}

[Html]
Background:
Package com. aegon_cnooc.oa.admin.action;
 
Import java. io. PrintWriter;
Import java. util. List;
Import java. util. Map;
 
Import javax. servlet. http. HttpServletRequest;
Import javax. servlet. http. HttpServletResponse;
 
Import net. sf. json. JSONArray;
Import net. sf. json. JSONSerializer;
Import net. sf. json. util. JSONUtils;
 
Import org. apache. struts. action. ActionForm;
Import org. apache. struts. action. ActionForward;
Import org. apache. struts. action. ActionMapping;
 
Import com. aegon_cnooc.framework.base.action.BaseAction;
Import com. aegon_cnooc.framework.log.Log;
Import com. aegon_cnooc.oa.admin.service.LoginService;
Import com. aegon_cnooc.util.LogPathUtil;
/**
*
* @ Despcrition:
* @ Author: liuxinghui
* @ Version: 1.0
* @ CreateDate: Jul 12,201 1
*/
Public class OnloadEmployeeAction extends BaseAction {
Private LoginService loginService;
Log logWrite = new Log ();
/**
* Click the single-choice button in the organizational structure definition to obtain the corresponding employees.
*/
Public ActionForward executeAction (ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
Throws Exception {
LogWrite. writeLog (LogPathUtil. getPath (), "start OnloadEmployeeAction...", "info ");
String employeeType = request. getParameter ("employee_type ");
If ("all". equals (employeeType )){
// Employees all of company
List employeesAllOfCompany = loginService. getEmployeesAllOfCompany ();
LogWrite. writeLog (LogPathUtil. getPath (), "Load employeesAllOfCompany. size ():" + employeesAllOfCompany. size (), "info ");
JSONArray json = (JSONArray) JSONSerializer. toJSON (employeesAllOfCompany );
Response. setContentType ("application/json; charset = gbk ");
Response. setCharacterEncoding ("gbk ");
PrintWriter pw = response. getWriter ();
Pw. write (JSONUtils. valueToString (json ));
Pw. flush ();
} Else {
// Employees not belong to any groupp
List employeeNotBelongToAnyGroup = loginService. getEmployeesNotBelongToAnyGroup ();
LogWrite. writeLog (LogPathUtil. getPath (), "Load employeeNotBelongToAnyGroup. size ():" + employeeNotBelongToAnyGroup. size (), "info ");
JSONArray json = (JSONArray) JSONSerializer. toJSON (employeeNotBelongToAnyGroup );
Response. setContentType ("application/json; charset = gbk ");
Response. setCharacterEncoding ("gbk ");
PrintWriter pw = response. getWriter ();
Pw. write (JSONUtils. valueToString (json ));
Pw. flush ();
}
Return null;
}
Public void setLoginService (LoginService loginService ){
This. loginService = loginService;
}
Public static void main (String [] args ){
String testStr =
"{\" Employees \ ": [{\" user_id \ ": 841, \" user_name \ ": \" EnidChen \ "},{ \" user_id \": \ "1445 \", \ "user_name \": \ "JulieZhu \" },{ \ "user_id \": \ "1447 \", \ "user_name \": \ "JasonMa \"}]} ";

Www.2cto.com
System. out. println (testStr );
Map json = (Map) JSONSerializer. toJSON (testStr );
List employees = (List) json. get ("employees ");
System. out. println (employees. size ());
Map json2 = (Map) JSONSerializer. toJSON (employees. get (0 ));

System. out. println (json2.get ("user_id "));
System. out. println (json2.get ("user_name "));

}
}

From xinghui_liu's column