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我想在struts中編寫小型登錄應用程序2.Session被創建成功。在welcome.jsp「註銷」選項給出。註銷控件將被重定向到Logout.jsp。 我的問題是註銷後會話變量被破壞，但頁面存儲在瀏覽器緩存中。如果單擊瀏覽器的後退按鈕，我可以看到welcome.jsp。 用於清除緩存「ClearCacheInterceptor」被使用。我不明白我在哪裏犯錯。 而不是每次都清除瀏覽器有沒有什麼可以克服這個問題？我的方法是否正確？請建議我。在struts2中登錄應用程序的問題
的Login.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Login</title>
</head>
<body>
<s:form action="login">
<s:textfield name="myname"></s:textfield>
<s:submit value="submit"></s:submit>
</s:form>
</body>
</html>
struts.xml中
<interceptors>
<interceptor name="clear-cache" class="ActionClasses.ClearCacheInterceptor" />
</interceptors>
<action name="login" class="ActionClasses.LoginAction" >
<interceptor-ref name="clear-cache" />
<result name="success">Welcome.jsp</result>
<result name="error">Login.jsp</result>
</action>
<action name="logout" class="ActionClasses.Logout">
<interceptor-ref name="clear-cache" />
<result name="success">Logout.jsp</result>
</action>
LoginAction.java
package ActionClasses;
import java.util.Map;
import org.apache.struts2.interceptor.SessionAware;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.validator.annotations.RequiredFieldValidator;
import com.opensymphony.xwork2.validator.annotations.ValidatorType;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.interceptor.Interceptor;
public class LoginAction extends ActionSupport implements SessionAware
{
/**
*
*/
private static final long serialVersionUID = 1L;
private String myname;
private Map<String , Object> s;
public String execute()throws Exception
{
s=ActionContext.getContext().getSession();
s.put("login", myname);
return "success";
}
public void setMyname(String s)
{
myname=s;
}
public String getMyname()
{
return myname;
}
@Override
public void setSession(Map<String, Object> arg0) {
// TODO Auto-generated method stub
s=arg0;
}
}
ClearcacheInterceptor.java
package ActionClasses;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.StrutsStatics;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
public class ClearCacheInterceptor extends AbstractInterceptor{
/**
*
*/
private static final long serialVersionUID = 1L;
@Override
public String intercept(ActionInvocation invocation) throws Exception {
ActionContext context=(ActionContext)invocation.getInvocationContext();
HttpServletResponse response=(HttpServletResponse)context.get(StrutsStatics.HTTP_RESPONSE);
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);
String result=invocation.invoke();
System.out.println("check result="+result);
return result;
}
}
Logout.java
package ActionClasses;
import java.util.Map;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class Logout extends ActionSupport {
public String execute(){
Map<String,Object> s=ActionContext.getContext().getSession();
s.remove("login");
ActionContext.getContext().getSession().clear();
return "success";
}
}
Welcome.jsp中
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<s:include value="CheckLogin.jsp"></s:include>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
</head>
<body>
<font color="white"></font>
Welcome<s:property value="#session['login']"/>
<s:a href="logout">Logout</s:a>
</body>
</html>
Logout.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
log out successful !!
</body>
</html>
CheckLogin.jsp
<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" contentType="text/html" import="java.util.*"%>
<html>
<head>
<title>Check validate!</title>
</head>
<body>
This is session validation page!
<s:if test="#session.login != 'Jagan'">
<jsp:forward page="Login.jsp" />
</s:if>
</body>
</html>
這似乎有點毛病在struts.xml中的攔截器。 – Jagan
註銷時刪除會話cookie可能是另一種解決方案，而不是每次都刪除緩存，但我不知道該怎麼做。 – Jagan
嘗試在攔截器中添加'response.setHeader（「Cache-Control」，「no-store」）;' – anu