forward.java

这个是使用java开发的一个平台

package com.exp.web.util.navigation;

import com.exp.fcl.security.EventLog;
import com.exp.fcl.security.UserLogin;
import com.exp.fcl.syscfg.SystemConfig;
import com.exp.fcl.util.StringUtil;
import com.exp.web.util.FormBean;
import com.exp.web.util.PageWrapper;

public class Forward {
    private static String PARAM_SIGN = "$";

    public static final String DYNMIC_FLAG = "dyn:";

    private boolean isDynmic = false;

    private String subject = "";

    private boolean bForward = false;

    private String url;

    public Forward(String subject, String forwardUrl, String forward) {
        if (null != subject) {
            this.subject = subject;
        }
        this.url = forwardUrl;
        if ("true".equalsIgnoreCase(forward)) {
            bForward = true;
        }
    }

    public Forward(String forwardUrl) {
        this("dynmic forward", forwardUrl, "false");
        this.isDynmic = true;
    }

    public String getSubject() {
        return this.subject;
    }

    public void doForward(PageWrapper pageWrapper) throws Exception {
        if (!"".equals(this.url)) {
            String target = replaceParams(this.url, pageWrapper.FormBean);
            logForward(pageWrapper, target);
            if (SystemConfig.ForwardEnCoding) {
                target = StringUtil.deCoding(target);
            }
            if (target.startsWith("/")) {
                target = pageWrapper.request.getContextPath() + target;
            }
            if (target.toLowerCase().startsWith("http://")
                    || target.toLowerCase().startsWith("https://")) {
                pageWrapper.response.sendRedirect(target);
            } else {
                if (this.bForward) {
                    pageWrapper.pageContext.forward(target);
                } else {
                    pageWrapper.response.sendRedirect(target);
                }
            }
        }
    }

    /**
     * 记录导航日志
     * 
     * @param pageContext
     *            页面上下文
     * @param toUri
     *            待导航的链接
     */
    protected static void logForward(PageWrapper pageContext, String toUri) {
        String sourceUri = pageContext.request.getRequestURI();
        EventLog log = EventLog.getDebugLog();
        if (log.isLogEnabled()) {
            StringBuffer buf = new StringBuffer();
            UserLogin login = pageContext.login;
            buf.append("[导航记录]");
            if (login != null) {
                buf.append("用户");
                buf.append(login.getUserID());
            }
            buf.append("从");
            buf.append(sourceUri);
            buf.append("到");
            buf.append(toUri);
            log.log(buf);
        }
    }

    /**
     * 处理导航链接中的参数
     * 
     * @param value
     *            导航链接
     * @param formBean
     *            当前FormBean
     * @return 处理后的链接
     */
    public static String replaceParams(String value, FormBean formBean) {
        String ret = value;
        String param = StringUtil.findFirstParam(PARAM_SIGN, PARAM_SIGN, ret);
        while (!param.equals("")) {
            String paramValue = formBean.getString(param);
            if (SystemConfig.ParamEnCoding) {
                paramValue = StringUtil.URLEncoding(paramValue);
            }
            ret = ret.replaceFirst("\\" + PARAM_SIGN + param + "\\"
                    + PARAM_SIGN, paramValue);
            param = StringUtil.findFirstParam(PARAM_SIGN, PARAM_SIGN, ret);
        }
        return ret;
    }

    public boolean equals(Object parm1) {
        return this.subject.equals(parm1);
    }

    public String toString() {
        if (this.isDynmic) {
            return DYNMIC_FLAG + this.url;
        }
        return this.subject;
    }

    public int hashCode() {
        return this.subject.hashCode();
    }

}