Jsp/Java代码分离.实现页面真正的代码分离 实现框架代码,jxui:page标签

package JXDO.WebUI;


import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;


public class PageTag extends TagSupport
...{
    public PageTag()...{super();}
    
    /**//*后端JAVA代码的类名*/
    private String codeBehind;
    public String getCodeBehind()...{return this.codeBehind;}
    public void setCodeBehind(String codeBehind)...{this.codeBehind=codeBehind;}
    

    public int doStartTag() throws JspException
    ...{
        try
        ...{
            String javaName = this.codeBehind;            
            if(!javaName.toLowerCase().endsWith(".java"))
                throw new JspException(codeBehind + " NotFound...");
            
            javaName = javaName.substring(0,javaName.lastIndexOf('.'));
            Class codeCls = Class.forName(javaName);
            Object objCls = codeCls.newInstance();    //建立实例

            //强制转换成基类[BasePage]
            BasePage bPage = (BasePage)objCls;
            bPage.writeContextToBasePage(this.pageContext);    //后台绑定代码的入口
        }
        catch(Exception ex)...{throw new JspException(ex.getMessage());}
        return EVAL_BODY_INCLUDE;
    }
    
    public int doEndTag() throws JspException
    ...{        
        return EVAL_PAGE;
    }    
}

 

 写过TAGLIB的一看就明白了,没什么需要解释的
尽请查看下一篇[实现框架代码 BasePage]篇.