Struts2 自定义拦截器 二则

异常拦截器:

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->package org.roadway.lm.util;

import org.apache.log4j.Logger;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
 * @author Huyvanpull
 * 
 */
@SuppressWarnings("serial")
public class ExceptionInterceptor extends AbstractInterceptor
{
    private Logger logger = Logger.getLogger(ExceptionInterceptor.class);
    
    private String interceptorName;
    
    @Override
    public String intercept(ActionInvocation invocation) throws Exception
    {
        this.logger.debug("进入" + this.getInterceptorName());
        String result = null;
        try
        {
            result = invocation.invoke();
        }
        catch (Exception exception)
        {
            this.logger.error(this.getExceptionInfo(exception));
            throw exception;
        }
        return result;
    }
    
    private String getExceptionInfo(Exception exception)
    {
        StringBuffer bExceptionInfo = new StringBuffer();
        bExceptionInfo.append(exception.toString());
        bExceptionInfo.append("\n\t");
        
        StackTraceElement[] stackTraceElements = exception.getStackTrace();
        for (int i = 0; i < stackTraceElements.length; i++)
        {
            bExceptionInfo.append("[" + this.getInterceptorName() + "] "
                    + stackTraceElements[i].toString() + "\n\t");
        }
        return bExceptionInfo.toString();
    }
    
    public String getInterceptorName()
    {
        return interceptorName;
    }
    
    public void setInterceptorName(String interceptorName)
    {
        this.interceptorName = interceptorName;
    }
    
}

登陆检查拦截器:

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> -->package org.roadway.lm.util;

import java.util.Map;

import org.apache.log4j.Logger;
import org.roadway.lm.po.UserInfo;
import org.roadway.lm.user.action.UserInfoAction;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
 * @author tom_hui
 * 
 */
@SuppressWarnings("serial")
public class LoginCheckerInterceptor extends AbstractInterceptor
{
    private String userSessionKey = "userInfo";
    
    private String isCheckLogin   = "true";
    
    private Logger logger         = Logger
                                          .getLogger(LoginCheckerInterceptor.class);
    
    @SuppressWarnings("unchecked")
    public String intercept(ActionInvocation actionInvocation) throws Exception
    {
        Object action = actionInvocation.getAction();
        
        /** 如果设置拦截器不检查登陆 */
        if ("false".equalsIgnoreCase(isCheckLogin))
        {
            actionInvocation.invoke();
        }
        /** 如果是登陆Action,放其通行 */
        if (action instanceof UserInfoAction)
        {
            this.logger.info("登陆Action:" + UserInfoAction.class.getName());
            return actionInvocation.invoke();
        }
        
        /** 从session中得到UserInfo的信息 */
        Map session = actionInvocation.getInvocationContext().getSession();
        UserInfo userInfo = (UserInfo) session.get(userSessionKey);
        
        /** 如果Session中存在UserInfo对象 */
        if (userInfo != null)
        {
            this.logger.info("用户" + userInfo.getUserName() + "("
                    + userInfo.getUserId() + ")登陆了.");
            return actionInvocation.invoke();
            
        }
        /** 如果没有登陆 */
        else
        {
            return Action.LOGIN;
        }
    }
    
    public String getUserSessionKey()
    {
        return userSessionKey;
    }
    
    public void setUserSessionKey(String userSessionKey)
    {
        this.userSessionKey = userSessionKey;
    }
    
    public String getIsCheckLogin()
    {
        return isCheckLogin;
    }
    
    public void setIsCheckLogin(String isCheckLogin)
    {
        this.isCheckLogin = isCheckLogin;
    }
    
}