1,标签的实现类NumenTag.java
import
java.util.ArrayList;
import
java.util.HashMap;
import
java.util.List;
import
java.util.Map;
import
javax.servlet.jsp.JspException;
import
javax.servlet.jsp.JspWriter;
import
javax.servlet.jsp.tagext.TagSupport;
/**
* 自定义的分页标签
*
*
@author
马万林
*
*/
public
class
NumenTag
extends
TagSupport
{
private
String url
=
null
;
private
Result result;
private
String page
=
null
;
private
String[] p;
private
Map kv
=
new
HashMap();
private
List key
=
null
;
/**
* 分离参数
*
@param
params
*/
public
void
setParams(String params)
{
key
=
new
ArrayList();
p
=
params.split(
"
;
"
);
for
(
int
i
=
0
; p.length
>
1
&&
i
<
p.length; i
++
)
{
kv.put(p[i].split(
"
:
"
)[
0
], p[i].split(
"
:
"
)[
1
]);
key.add(p[i].split(
"
:
"
)[
0
]);
}
}
/**
* 分页的结果
*
@param
result
*/
public
void
setResult(String result)
{
this
.result
=
(Result) pageContext.getRequest().getAttribute(
"
result
"
);
this
.page
=
(String) pageContext.getRequest().getAttribute(
"
page
"
);
}
public
void
setUrl(String url)
{
this
.url
=
url;
}
public
int
doStartTag()
throws
JspException
{
StringBuffer sb
=
null
;
if
(result
!=
null
&&
result.getContent()
!=
null
&&
result.getContent().size()
>
0
)
{
sb
=
new
StringBuffer(
"
分页:
"
);
if
(result.getPage().getHasPrePage())
{
sb.append(
"
<a href='
"
).append(url);
if
(url.indexOf(
"
?
"
)
==
-
1
)
sb.append(
"
?page=1
"
);
else
sb.append(
"
&page=1
"
);
linkParams(sb);
sb.append(
"
'>
"
).append(
"
首页
"
).append(
"
</a>
"
).append(
"
|
"
);
sb.append(
"
<a href='
"
).append(url);
if
(url.indexOf(
"
?
"
)
==
-
1
)
sb.append(
"
?page=
"
).append(
result.getPage().getPreviousPage());
else
sb.append(
"
&page=
"
).append(
result.getPage().getPreviousPage());
linkParams(sb);
sb.append(
"
'>
"
).append(
"
上页
"
).append(
"
</a>
"
).append(
"
|
"
);
}
if
(result.getPage().getHasNextPage())
{
sb.append(
"
<a href='
"
).append(url);
if
(url.indexOf(
"
?
"
)
==
-
1
)
sb.append(
"
?page=
"
).append(result.getPage().getNextPage());
else
sb.append(
"
&page=
"
).append(result.getPage().getNextPage());
linkParams(sb);
sb.append(
"
'>
"
).append(
"
下页
"
).append(
"
</a>
"
).append(
"
|
"
);
sb.append(
"
<a href='
"
).append(url);
if
(url.indexOf(
"
?
"
)
==
-
1
)
sb.append(
"
?page=
"
).append(result.getPage().getTotalPage());
else
sb.append(
"
&page=
"
).append(result.getPage().getTotalPage());
linkParams(sb);
sb.append(
"
'>
"
).append(
"
尾页
"
).append(
"
</a>
"
);
}
sb
.append(
"
跳转到:<select name='goToPage' onchange='javascript:goPage(this.value)'>
"
);
int
s
=
result.getPage().getTotalCount();
for
(
int
i
=
1
; i
<=
s; i
++
)
{
sb.append(
"
<option value=
"
).append(i);
if
(Integer.parseInt(page)
==
i)
sb.append(
"
selected
"
);
sb.append(
"
>第
"
).append(i).append(
"
页</option>
"
);
}
sb.append(
"
</select>
"
);
sb.append(
"
<script language=javascript>
"
);
sb.append(
"
function goPage(page){
"
).append(
"
window.location='
"
)
.append(url);
if
(url.indexOf(
"
?
"
)
==
-
1
)
sb.append(
"
?page='+
"
).append(
"
page
"
);
else
sb.append(
"
&page='+
"
).append(
"
page
"
);
sb.append(
"
+'
"
);
linkParams(sb);
sb.append(
"
';
"
);
sb.append(
"
}
"
);
sb.append(
"
</script>
"
);
}
try
{
if
(sb
!=
null
)
{
JspWriter out
=
pageContext.getOut();
out.print(sb);
}
}
catch
(Exception e)
{
throw
new
JspException(e);
}
return
EVAL_PAGE;
}
/**
* 链接参数处理
*
@param
sb
*/
private
void
linkParams(StringBuffer sb)
{
for
(
int
i
=
0
; i
<
key.size(); i
++
)
{
sb.append(
"
&
"
).append(key.get(i)).append(
"
=
"
).append(
kv.get(key.get(i)));
}
}
}
2,标签定义文件numentag.tld
<?
xml version="1.0" encoding="utf-8"
?>
<!
DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd"
>
<
taglib
>
<
tlib-version
>
1.0
</
tlib-version
>
<
jsp-version
>
1.2
</
jsp-version
>
<
short-name
>
numen
</
short-name
