<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="fuyou" uri="/WEB-INF"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<% String name="fuyoubao";
String value="zhenping";
%>
<body>
<fuyou:list name="zhenping" n1="fuyou" n2="zp" n3="fyb" n4="fyj"/>
<!-- 如果把下面这行注释了,它就正常运行,显示下拉列表 -->
<fuyou:list <%=name%>=<%=zhenping%> n1="fuyou" n2="zp" n3="fyb" n4="fyj"/>
</body>
</html>package com.fuyou;import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import java.util.Map;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.DynamicAttributes;
import javax.servlet.jsp.tagext.TagSupport;public class ListTag extends TagSupport implements DynamicAttributes { private String name = "";
private HashMap map = new HashMap();
public void setName(String name){
this.name = name;
}
public void setDynamicAttribute(String uri, String locaName, Object value)
throws JspException {
System.out.println(uri); //这里打出来的null,uri是指什么
map.put(locaName, value); }
public int doStartTag()throws JspException{
JspWriter out = pageContext.getOut();
Set list = map.entrySet();
try{
out.print("<select name='"+name+"'>");
Iterator it = list.iterator();
while(it.hasNext()){
Map.Entry entry = (Map.Entry)it.next();
out.print("<option value='");
out.print(entry.getKey());
out.print("'>");
out.print(entry.getValue());
out.println("</option>");
}
out.print("</select>");
}catch(IOException e){
e.printStackTrace();
}
return super.doStartTag();
}}<?xml version="1.0" encoding="UTF-8" ?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--><taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<description>A tag library exercising SimpleTag handlers.</description>
<tlib-version>1.0</tlib-version>
<short-name>fuyous</short-name>
<uri>/WEB-INF</uri>
<tag>
<name>viewIp</name>
<tag-class>com.fuyou.ViewIpTag</tag-class>
<body-content>empty</body-content>
</tag>
<tag>
<name>list</name>
<tag-class>com.fuyou.ListTag</tag-class>
<body-content>empty</body-content>
<attribute>
<name>name</name>
<required>true</required>
</attribute>
<dynamic-attributes>true</dynamic-attributes>
</tag>
</taglib>
<%@ taglib prefix="fuyou" uri="/WEB-INF"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<% String name="fuyoubao";
String value="zhenping";
%>
<body>
<fuyou:list name="zhenping" n1="fuyou" n2="zp" n3="fyb" n4="fyj"/>
<!-- 如果把下面这行注释了,它就正常运行,显示下拉列表 -->
<fuyou:list <%=name%>=<%=zhenping%> n1="fuyou" n2="zp" n3="fyb" n4="fyj"/>
</body>
</html>package com.fuyou;import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import java.util.Map;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.DynamicAttributes;
import javax.servlet.jsp.tagext.TagSupport;public class ListTag extends TagSupport implements DynamicAttributes { private String name = "";
private HashMap map = new HashMap();
public void setName(String name){
this.name = name;
}
public void setDynamicAttribute(String uri, String locaName, Object value)
throws JspException {
System.out.println(uri); //这里打出来的null,uri是指什么
map.put(locaName, value); }
public int doStartTag()throws JspException{
JspWriter out = pageContext.getOut();
Set list = map.entrySet();
try{
out.print("<select name='"+name+"'>");
Iterator it = list.iterator();
while(it.hasNext()){
Map.Entry entry = (Map.Entry)it.next();
out.print("<option value='");
out.print(entry.getKey());
out.print("'>");
out.print(entry.getValue());
out.println("</option>");
}
out.print("</select>");
}catch(IOException e){
e.printStackTrace();
}
return super.doStartTag();
}}<?xml version="1.0" encoding="UTF-8" ?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--><taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<description>A tag library exercising SimpleTag handlers.</description>
<tlib-version>1.0</tlib-version>
<short-name>fuyous</short-name>
<uri>/WEB-INF</uri>
<tag>
<name>viewIp</name>
<tag-class>com.fuyou.ViewIpTag</tag-class>
<body-content>empty</body-content>
</tag>
<tag>
<name>list</name>
<tag-class>com.fuyou.ListTag</tag-class>
<body-content>empty</body-content>
<attribute>
<name>name</name>
<required>true</required>
</attribute>
<dynamic-attributes>true</dynamic-attributes>
</tag>
</taglib>
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楼主【fuyou001】截止到2008-07-18 16:38:50的历史汇总数据(不包括此帖)：
发帖的总数量:160 发帖的总分数:4325 每贴平均分数:27
回帖的总数量:993 得分贴总数量:372 回帖的得分率:37%
结贴的总数量:159 结贴的总分数:4295
无满意结贴数:19 无满意结贴分:745
未结的帖子数:1 未结的总分数:30
结贴的百分比:99.38 % 结分的百分比:99.31 %
无满意结贴率:11.95 % 无满意结分率:17.35 %
值得尊敬
<fuyou:list <%=name%>=<%=zhenping%> n1="fuyou" n2="zp" n3="fyb" n4="fyj"/>
</body>
这样写就不对,控制台报下面的错:
2008-7-18 16:21:46 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet jsp threw exception
org.apache.jasper.JasperException: /index.jsp(27,15) Unterminated <fuyou:list tag
at org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)