Use ajax to verify whether an operation is performed on the front end.
jquery.post parameters are
url, [data], [callback], [type]
url: sending request address.
data: Key/value parameters to be sent.
callback: callback function when sending successfully.
type: Return content format, xml, html, script, json, text, _default.
$.post('admin/HhCheckVote.do?ids =' '${ids}', {}, function(flag) {
if(flag.isVote=="true"){
document.getElementById("jvForm").action="admin/HhArticleVoteCommit .do";
document.getElementById("jvForm").submit();
}else{
alert("You have already voted!");
}
}) ;
The action configuration in struts.xml is:
class="org.bkgd.ehome.jeeplugin.userapp.web.action.ActionHhArticleQuery">
Action
private String isVote;
public String getIsVote() {
return isVote;
}
public void setIsVote(String isVote) {
this.isVote = isVote;
}
public String checkVote(){
try {
List> list = aloneIMP.checkVote(ids,getCurrentUser ()).search().getResultList();
if(list.size()==0){
isVote = "true";
}else{
isVote = "false" ;
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return SUCCESS;
}
PS:
The return value of the action method must be a global variable, and must have get and set methods. Local variables are not allowed.
The method has a return value and cannot be void.
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