一个菜菜的问题。。。。。。。。。。。。。。。。。。。。。。。。。。。。。

1.jsp里可以这样用
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@ taglib uri="/WEB-INF/struts-template.tld" prefix="template" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
2.那四个.tld都是struts里就有的。不用修改了，拷过去放到你的myapp/web-inf/下就可以了。
3.web.xml中添加如下内容。
  <taglib>
    <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-bean.tld</taglib-location>
  </taglib>
  <taglib>
    <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-html.tld</taglib-location>
  </taglib>
  <taglib>
    <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-logic.tld</taglib-location>
  </taglib>
  <taglib>
    <taglib-uri>/WEB-INF/struts-template.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-template.tld</taglib-location>
  </taglib>

unsalted(icebird):你好！
  是这样的，我是自定义标签，我是用自己写的*.tld  Hello.jsp
  ##############################
  <%@ page contentType="text/html; charset=gb2312" language="java" %>
<%@ taglib uri="/WEB-INF/Social_Type.tld" prefix="taglib" %>
<html>
<head>
<title>Social_Type taglib</title>
</head>
<body>
<td>大家好！</td>
<taglib:Social_Type width="200" height= "100">
</taglib:Social_Type>
</body>
</html>
Social_Type.tld
###############################################3<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
<taglib>
<tlibversion>1.0</tlibversion>
<jspversion>1.1</jspversion>
<shortname>Social_Type taglib</shortname>
<tag>
<name>Social_Type</name>
<tagclass>interboss.Taglib.Social_Type</tagclass>
<attribute>
      　　　　<name>height</name>
      　　　　<required>true</required>
      　　　　<rtexprvalue>true</rtexprvalue>
</attribute>
<attribute>
      　　　　<name>width</name>
      　　　　<required>true</required>
      　　　　<rtexprvalue>true</rtexprvalue>
</attribute>
</tag>
</taglib>
web.xml加：＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃＃<display-name>Social_Type taglib</display-name>
    <description>
      just a  example
    </description>
    <taglib>
        <taglib-uri>/WEB-INF/Social_Type.tld</taglib-uri>
        <taglib-location>/WEB-INF/Social_Type.tld</taglib-location>
   </taglib>Social_Type.javapackage interboss.TagLib;import java.io.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.sql.Connection;
import interboss.base.DBServer;
import interboss.base.Sqlca;public class Social_Type extends TagSupport{
    private String width;
    private String height;    public Social_Type() {
        super();
    }    public int doStartTag() throws JspTagException{
        String Stype = null;
        String SNAME = null;
        String Sjsp = "<td><select name=\"idtype\"><option value=\"\"></option>";        try{
            String sSocial_type
                    = "select SOCIAL_TYPE_ID, SOCIAL_NAME from social_type where order by SOCIAL_TYPE_ID";            Connection conn = DBServer.getConnection();
            Sqlca sqlca = new Sqlca(conn);
            sqlca.setSql(sSocial_type);
            sqlca.execute();
            while(sqlca.next()){
                Stype = sqlca.getString(1);
                SNAME = sqlca.getString(2);
                Sjsp = Sjsp+"<option value=\"" + Stype+ "\">" + SNAME + "          </option>";            }            Sjsp = Sjsp+"</select></td>";        }catch(Exception e){
            System.err.println("Exception thrown in sql sentence:");
            System.err.println(e.toString());
        }        try{
            JspWriter out = pageContext.getOut();
            out.println(Sjsp);
        }
        catch(IOException ioerror){
            System.err.println("IO Exception thrown in Social_Type.daStartTage():");
            System.err.println(ioerror.toString());
        }
        return SKIP_BODY;
    }    public int doEndTag() throws JspTagException{
        return EVAL_PAGE;
    }    public void release()
    {
        super.release();
    }
    public void setWidth(String width)
    {
        this.width = width;
    }
    public String getWidth()
    {
        return this.width;
    }
    public void setHeight(String height)
    {
        this.height=height;
    }
    public String getHeight()
    {
        return this.height;
    }}我运行Hello.jsp报错：
Parsing of JSP File '/taglib/HelloWorld.jsp' failed:
--------------------------------------------------------------------------------
/taglib/HelloWorld.jsp(2): Error in using tag library uri='/WEB-INF/Social_Type.tld' prefix='taglib': cannot find tag class: 'interboss.Taglib.Social_Type'
probably occurred due to an error in /taglib/HelloWorld.jsp line 2:
<%@ taglib uri="/WEB-INF/Social_Type.tld" prefix="taglib" %>
--------------------------------------------------------------------------------
Tue Aug 12 16:50:46 CST 2003

我怀疑是包的问题，Social_Type.java中是package interboss.TagLib;而Social_Type中是<tagclass>interboss.Taglib.Social_Type</tagclass>
把包名都改成小写试试吧。
如果是自定义标签的话，要在自定义的*.tld(struts-user.tld)中的<tagclass></tagclass>标签中指明标签类的位置。在web.xml中加入
  <taglib>
    <taglib-uri>/WEB-INF/struts-user.tld</taglib-uri>
    <taglib-location>/WEB-INF/struts-user.tld</taglib-location>
  </taglib>
在jsp里
<%@ taglib uri="/WEB-INF/struts-user.tld" prefix="user" %>
然后使用的时候就可以<user:tagname>这样用。

package interboss.TagLib；和interboss.Taglib.Social_Type中一个是TagLib，另一个是Taglib

Social_Type.tld
---------------
<tagclass>interboss.Taglib.Social_Type</tagclass>
改:
<tagclass>interboss.TagLib.Social_Type</tagclass>
要和你定义这个类的包名大小写一致!!!
package interboss.TagLib; <<-----=====

调试易

一个菜菜的问题。。。。。。。。。。。。。。。。。。。。。。。。。。。。。

解决方案 »