struts2的拦截器实现了防止表单重复提交的功能,即token拦截器,在表单提交页面写上<s:token/>,在struts.xml配置文件中相应的action上配置拦截器
此拦截器只能用在有form的提交请求上。如果是通过url链接请求action,就只能手动控制了。请参考“struts2中采用url链接的action请求如何防止重复提交”
要是不使用struts2的拦截器,如何防止表单重复提交呢?在struts2里面实现比较简单
1.在跳转到表单填写页面的action里面往session放一个值
2.在表单填写页面加上接收session值的隐藏域,sub是定义在action里面的一个属性,提供get set方法即可
3.在action提交的方法中判断页面提交过来的sub是否不为空,并且等于从session中取出的session_value的值
如果满足,先移除session里的那个值,再执行提交表单操作;如果不满足,就是重复提交,不会提交表单
此拦截器只能用在有form的提交请求上。如果是通过url链接请求action,就只能手动控制了。请参考“struts2中采用url链接的action请求如何防止重复提交”
//
配置如下
< action name = " cbApplySubmit " class = " CBApplyAction "
method = " cbApplyFromSubmit " >
< interceptor - ref name = " tokenStack " />
< result name = " input " type = " ivTiles " >
< param name = " attMap " >
# {'main':'/assets/businessChange/addChangeBusiness.jsp'}
</ param >
</ result >
< result type = " redirect-action " name = " invalid.token " >
< param name = " actionName " > queryCB </ param >
< param name = " namespace " >/ assets / businessChange </ param >
</ result >
// 页面如下,注意要加在form里面
< s:form method = " POST " action = " cbApplySubmit " name = " anewApplyForm " namespace = " /assets/businessChange " >
< s:token />
// . //
</ s:form >
< action name = " cbApplySubmit " class = " CBApplyAction "
method = " cbApplyFromSubmit " >
< interceptor - ref name = " tokenStack " />
< result name = " input " type = " ivTiles " >
< param name = " attMap " >
# {'main':'/assets/businessChange/addChangeBusiness.jsp'}
</ param >
</ result >
< result type = " redirect-action " name = " invalid.token " >
< param name = " actionName " > queryCB </ param >
< param name = " namespace " >/ assets / businessChange </ param >
</ result >
// 页面如下,注意要加在form里面
< s:form method = " POST " action = " cbApplySubmit " name = " anewApplyForm " namespace = " /assets/businessChange " >
< s:token />
// . //
</ s:form >
要是不使用struts2的拦截器,如何防止表单重复提交呢?在struts2里面实现比较简单
1.在跳转到表单填写页面的action里面往session放一个值
public
String execute()
throws
Exception {
// 向session中放置一个值
ActionContext actionContext = ActionContext.getContext();
Map session = actionContext.getSession();
session.put( " session_value " , Math.random() + "" );
return SUCCESS;
}
// 向session中放置一个值
ActionContext actionContext = ActionContext.getContext();
Map session = actionContext.getSession();
session.put( " session_value " , Math.random() + "" );
return SUCCESS;
}
2.在表单填写页面加上接收session值的隐藏域,sub是定义在action里面的一个属性,提供get set方法即可
<
input type
=
"
hidden
"
name
=
"
sub
"
value
=
"
${session_value}
"
/>
3.在action提交的方法中判断页面提交过来的sub是否不为空,并且等于从session中取出的session_value的值
如果满足,先移除session里的那个值,再执行提交表单操作;如果不满足,就是重复提交,不会提交表单
public
String cbApplyFromSubmit()
throws
Exception {
// 将页面hidden提交的值和session中的值比较
ActionContext actionContext = ActionContext.getContext();
Map session = actionContext.getSession();
String obj = (String) session.get( " session_value " );
if (sub != null && sub.equals(obj)) {
session.remove( " session_value " );
// 保存数据
chBusiness.saveCBApplyForm(changeApplyFormBO);
return SUCCESS;
} else {
return " invalid " ;
}
}
// 将页面hidden提交的值和session中的值比较
ActionContext actionContext = ActionContext.getContext();
Map session = actionContext.getSession();
String obj = (String) session.get( " session_value " );
if (sub != null && sub.equals(obj)) {
session.remove( " session_value " );
// 保存数据
chBusiness.saveCBApplyForm(changeApplyFormBO);
return SUCCESS;
} else {
return " invalid " ;
}
}