editortag.java

一个专门用来快速开发网站的框架

package com.core.taglib;


import java.util.List;
import com.core.taglib.components.SelectOption;
import com.opensymphony.webwork.views.jsp.TagUtils;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;


public class EditorTag extends javax.servlet.jsp.tagext.TagSupport {
    private static Log log = LogFactory.getLog(EditorTag.class);
    String name = "";
    String type = "";
    String size = "";
    boolean nullable = true;
    String charset = "";
    String datatype = "";
    String namevalue = "";

    public EditorTag() {
    }

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

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

        return EVAL_BODY_INCLUDE;
    }

    /**
     * 下拉框和录入框合二为一：
     * 1、如果缓存中没有就显示输入框。
     * 2、如果缓存中有就显示下拉框。
     */
    public String getEditor() {
        String ret="";
        // 两种情况都相同的部分
        String strComm=" name='"+name+"' type='"+type+"' size='"+size+"' nullable='"+nullable+"' charset='"+charset+"' datatype='"+datatype+"' namevalue='"+namevalue+"'";
        // 检查OgnlValueStack是否有值。
        Object stackObject = TagUtils.getStack(this.pageContext).findValue(name);
        String code = "";
        String strInputValue="";
        if (null != stackObject) {
            code = stackObject.toString();
            strInputValue = "value='"+code+"'";
            log.info("在OgnlValueStack找到了" + name + "! 它的值是：" + code);
        }
        // 检查是否有缓存列表。
        List selectList=SelcetCache.getInstance().getSelect(name);
        if(null==selectList){//1、如果缓存中没有就显示输入框。
            ret="<input "+strComm+strInputValue+">";
        }else{//2、如果缓存中有就显示下拉框。
            ret="<select"+strComm+">";
            ret+="<option value=''>---请选择---</option>";
            for(int i=0;i<selectList.size();i++){
                SelectOption option=(SelectOption)selectList.get(i);
                String isSelect="";
                if(option.getValue().equals(code)){
                    isSelect="selected";
                }
                ret+="<option value='"+option.getValue()+"' "+isSelect+">"+option.getTitle()+"</option>";
            }
            ret+="</select>";
        }
        return ret;
    }

    public String getCharset() {
        return charset;
    }

    public String getDatatype() {
        return datatype;
    }

    public String getName() {
        return name;
    }

    public String getNamevalue() {
        return namevalue;
    }

    public String getSize() {
        return size;
    }

    public String getType() {
        return type;
    }

    public boolean isNullable() {
        return nullable;
    }

    public void setCharset(String charset) {
        this.charset = charset;
    }

    public void setDatatype(String datatype) {
        this.datatype = datatype;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setNamevalue(String namevalue) {
        this.namevalue = namevalue;
    }

    public void setSize(String size) {
        this.size = size;
    }

    public void setType(String type) {
        this.type = type;
    }

    public void setNullable(boolean nullable) {
        this.nullable = nullable;
    }

}