我需要从 struts(1.3.10) 操作类返回对 ajax 的响应。 我使用 PrintWriter 类将响应返回给客户端(浏览器)。它有时有效，但有时，它会在 jsp 页面中显示响应。
这是我的 jsp 和 ajax 函数:
<html:submit property="" styleClass="btn btn-success" onclick="doChangePassword()">Ok</html:submit>
<script type="text/javascript">
function doChangePassword(){
//get the form values
var oldPassword = $('#oldPassword').val();
var newPassword = $('#newPassword').val();
var confirmPassword = $('#confirmPassword').val();
// alert(customerName+" "+imeiNo+" "+targetName+" "+simNo+" "+duedate+" "+remark);
$.ajax({
type: "POST",
url: "/GPS-VTS/change_account_password.do",
data: "oldpassword="+oldPassword+"&newpassword="+newPassword+"&confirmpassword="+confirmPassword,
dateType: "string",
success: function(response){
alert(response);
var result = $.trim(response);
// alert(result);
if(result === "oldPassword")
{
// Example.show("Hello world callback");
alert("Please provide valid entries for Old Password field.");
$('#oldPassword').val("");
//alert('Product sold successfully.');
}
else if(result === "newPasswordEmpty"){
alert("Please provide valid entries for New Password field.");
}
else if(result === "newPassword")
{
alert("Please provide valid entries for New or Confirm Password fields.");
$('#newPassword').val("");
$('#confirmPassword').val("");
}else if(result === "success")
{
alert("Password Successfully Changed.");
$('#oldPassword').val("");
$('#newPassword').val("");
$('#confirmPassword').val("");
}
},
error: function(e){
alert('Error :'+e);
}
});
}
</script>
这是我的操作类(account_password_action.java):
public class account_password_action extends org.apache.struts.action.Action {
/* forward name="success" path="" */
private static final String SUCCESS = "success";
private static final String FAILURE = "failure";
private long account_id;
private String encrypted_password = new String();
private String account_name = new String();
private String account_password = new String();
/**
* This is the action called from the Struts framework.
*
* @param mapping The ActionMapping used to select this instance.
* @param form The optional ActionForm bean for this request.
* @param request The HTTP Request we are processing.
* @param response The HTTP Response we are processing.
* @throws java.lang.Exception
* @return
*/
@Override
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
/*Get Session Value*/
String acc_name = request.getSession().getAttribute("login_name").toString();
/*Create Session Factory Object*/
SessionFactory factory = new Configuration().configure().buildSessionFactory();
Session session = factory.openSession();
Transaction t = session.beginTransaction();
/*Extract user data from Bean class -> account_bean.java*/
account_password_bean fromBean = (account_password_bean) form;
String old_password = fromBean.getOldpassword();
/*get encrypted password from database*/
Query enc_password = session.createQuery("from account_dao where name=?");
enc_password.setString(0, acc_name);
List list = enc_password.list();
for (Iterator iterator = list.iterator(); iterator.hasNext();) {
account_dao account = (account_dao) iterator.next();
account_id = account.getId();
account_name = account.getName();
encrypted_password = account.getPassword();
}
/*Decrypt the password using AES algorithm*/
account_password = AESencrp.decrypt(encrypted_password.toString().trim());
if (!old_password.equals(account_password)) {
PrintWriter out = response.getWriter();
response.setContentType("text/html;charset=utf-8");
response.setHeader("cache-control", "no-cache");
//out.print("oldPassword");
out.write("oldPassword");
out.flush();
return null;
}
else if(fromBean.getNewpassword().equals("") || fromBean.getNewpassword() == null)
{
PrintWriter out = response.getWriter();
response.setContentType("text/html;charset=utf-8");
response.setHeader("cache-control", "no-cache");
//out.print("newPasswordEmpty");
out.write("newPasswordEmpty");
out.flush();
return null;
}
else if (fromBean.getNewpassword().equals(fromBean.getConfirmpassword())) {
String new_password = fromBean.getNewpassword();
String new_enc_password = AESencrp.encrypt(new_password.toString().trim());
Query update_query = session.createQuery("update account_dao set password = :newPassword" + " where id = :Id");
update_query.setParameter("newPassword", new_enc_password);
update_query.setParameter("Id", account_id);
int update_status = update_query.executeUpdate();
t.commit();
}
else {
PrintWriter out = response.getWriter();
response.setContentType("text/html;charset=utf-8");
response.setHeader("cache-control", "no-cache");
//out.print("newPassword");
out.write("newPassword");
out.flush();
return null;
}
PrintWriter out = response.getWriter();
response.setContentType("text/html;charset=utf-8");
response.setHeader("cache-control", "no-cache");
out.write("success");
out.flush();
return null;
//return mapping.findForward(SUCCESS);
}
}
这是我在 Chrome 浏览器中的输出:
火狐浏览器:
有时它会在警报框中显示正确的输出:
大家好，请帮助我如何查看每次在警报框中显示的回复。 我能做些什么？什么问题？我该如何解决它？浏览器版本有问题吗？
请大家帮帮我......
提前致谢。
最佳答案
在您的 ajax 调用中，提供附加参数 async : false。
$.ajax({
type: "POST",
url: "/GPS-VTS/change_account_password.do",
async: false,
data: "oldpassword="+oldPassword+"&newpassword="+newPassword+"&confirmpassword="+confirmPassword,
dateType: "string",
success: function(response){
.....
}
关于java - 如何从struts操作类返回对ajax的多个响应？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/20756247/