java web

1)  java web 表现层Action基类模版：

 

package org.springside.examples.miniweb.web;

 

import java.io.IOException;

import java.io.PrintWriter;

 

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

 

import org.apache.log4j.Logger;

import org.apache.struts2.ServletActionContext;

 

import com.opensymphony.xwork2.ActionSupport;

 

/**

 * Action公共处理类

 * 

 * 

 * @version $Revision: 1.9 

 * @Date: 2008/04/02 05:48:40

 */

public abstract class BasicActionSupport extends ActionSupport  {

 

public static Logger logger = Logger.getLogger(BasicActionSupport.class); 

 

/** 进行增删改操作后,以redirect方式重新打开action默认页的result名.*/

public static final String RELOAD = "reload";

    /**

     * 得到request

     * @return

     */

protected HttpServletRequest getRequest() {

        return ServletActionContext.getRequest();  

    }

    /**

     * 得到response

     * @return

     */

protected HttpServletResponse getResponse() {

return ServletActionContext.getResponse();

}

    /**

     * 取得web发布路径

     * @return 容器路径

     */

    public String getContextPath(){

    return ServletActionContext.getServletContext().getRealPath("/");

    }

    

 

/**

* 运用j2ee api将数据发给客户端（页面）

* @param content

* @throws IOException

*/

protected void sendClient(String content)

{

HttpServletResponse response = ServletActionContext.getResponse();

response.setContentType("text/html;charset=utf-8");

response.addHeader("pragma", "no-cache"); 

response.addHeader("cache-control", "no-cache,must-revalidate"); 

response.addHeader("expires", "0"); 

PrintWriter out;

try {

out = response.getWriter();

out.print(content);

out.flush();

out.close();

} 

catch (IOException e) {

}

}  

 

}

 

2) 系统登陆过滤器

package com.magnus.core.filter;

 

import java.io.IOException;

 

import javax.servlet.Filter;

import javax.servlet.FilterChain;

import javax.servlet.FilterConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

 

public class SysUserFilter implements Filter {

private FilterConfig config;

 

/**

* 一个字符串是否包含字符数组中的字符串

* 

* @param container

* @param regx

* @return

*/

public static boolean isContains(String container, String[] regx) {

boolean result = false;

for (int i = 0; i < regx.length; i++) {

if (container.indexOf(regx[i]) != -1) {

result = true;

}

}

return result;

}

 

public void destroy() {

 

}

 

public void doFilter(ServletRequest req, ServletResponse res,

FilterChain chain) throws IOException, ServletException {

HttpServletRequest request = (HttpServletRequest) req;

HttpServletResponse response = (HttpServletResponse) res;

 

// 当管理员登录后让所有请求全部通过

if (request.getSession().getAttribute("user_name") != null&&!"".equals(request.getSession().getAttribute("user_name"))){

chain.doFilter(req, res);

}

// 当管理员没有登录

else {

//但是属于例外则通过

String noincludes = (String) config.getInitParameter("noincludes");

String[] str = noincludes.split(";");

if ((isContains(request.getRequestURL().toString(), str))) {

chain.doFilter(req, res);

}

else{

if("".equals(request.getSession().getAttribute("user_name"))){

response.getWriter().write("<script>top.parent.location.href='"+request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath()+"/index.html?other';</script>");

request.getSession().invalidate();

}

else{

response.getWriter().write("<script>top.parent.location.href='"+request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath()+"';</script>");

}

return;

}

}

}

public void init(FilterConfig config) throws ServletException {

this.config = config;

}

}