struts 登录拦截器的使用

LoginAction

public class LoginAction extends ActionSupport implements SessionAware{

private String username;

private String password;

private Map session;

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String execute(){

if(username.equals("zs")&&password.equals("123")){

session.put("username", username);

session.put("password", password);

return SUCCESS;

}

return ERROR;

}

public void setSession(Map<String, Object> arg0) {

this.session=arg0;

}

}

LoginBeforeAction

import com.opensymphony.xwork2.ActionSupport;

public class LoginBeforeAction extends ActionSupport{

public String execute(){

return SUCCESS;

}

}

LoginAfterAction

public class LoginAfterAction extends ActionSupport implements SessionAware{

private String username;

private String password;

private Map session;

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

public String execute(){

return SUCCESS;

}

public void setSession(Map<String, Object> arg0) {

this.session=arg0;

}

}

LoginIntecepter

public class LoginIntecepter extends AbstractInterceptor{

public String intercept(ActionInvocation invocation) throws Exception {

Map session=(Map)invocation.getInvocationContext().getSession();

Object object=session.get("username");

if(object!=null){

return invocation.invoke();

}

return "error";

}

}

<struts>

<package name="login" namespace="/login" extends="struts-default">

<interceptors>

<interceptor name="loginIntercepter" class="com.login.actions.LoginIntecepter"></interceptor>

<interceptor-stack name="mystack">

<interceptor-ref name="defaultStack"></interceptor-ref>

<interceptor-ref name="loginIntercepter"></interceptor-ref>

</interceptor-stack>

</interceptors>

<action name="before" class="com.login.actions.LoginBeforeAction">

<result>/login.jsp</result>

</action>

<action name="login" class="com.login.actions.LoginAction">

<result>/main.jsp</result>

<result name="error">/login.jsp</result>

</action>

<action name="after" class="com.login.actions.LoginAfterAction">

<result>/main.jsp</result>

<result name="error">/login.jsp</result>

<interceptor-ref name="mystack"></interceptor-ref>

</action>

</package>

</struts>

<form action="login/login.do" method="post">

username:<input type="text" name="username"/><p>

password:<input type="password" name="password"/><p>

<input type="submit" value="submit"/>

</form>