hiddentag.java

来自「一个专门用来快速开发网站的框架」· Java 代码 · 共 52 行

package com.core.taglib;

import org.apache.commons.logging.*;
import com.opensymphony.webwork.views.jsp.*;


public class HiddenTag extends BaseTag {
    private static Log log = LogFactory.getLog(HiddenTag.class);

    public int doStartTag() throws javax.servlet.jsp.JspException {
        return SKIP_BODY;
    }

    public int doEndTag() throws javax.servlet.jsp.JspException {
        try {
            pageContext.getOut().print(getHtmlStr());
        } catch (Exception e) {
            throw new javax.servlet.jsp.JspException(e);
        }

        return EVAL_BODY_INCLUDE;
    }
    //得到最终的字符串
        public String getHtmlStr() {
            String ret = "";
            // 两种情况都相同的部分
            String strComm = super.getCommHtml();
            // 检查OgnlValueStack是否有值。
            Object stackObject = TagUtils.getStack(this.pageContext).findValue(name);
            String strInputValue = "";

            if(getValue() != null && !getValue().equals("")){
//            strInputValue = " value=\"" + getValue() + "\"";
                strInputValue = getValue();
            }
            if (null != stackObject && !stackObject.equals("")) {
                strInputValue = stackObject.toString();
            }

            strInputValue = " value=\"" + strInputValue + "\"";

//            if(!strInputValue.equals("")){
//                strInputValue = " value=\"" + strInputValue + "\"";
//            }

            ret = "<input type=\"hidden\" " + strComm + strInputValue + ">";

            return ret;
        }

}