简易java分页标签

1,标签的实现类NumenTag.java

java 代码

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 代码

<?
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
>
    <!--OutputTag-->
    <
tag
>
        <
name
>
out
</
name
>
        <
tag-class
>
cn.cityyouth.util.NumenTag
</
tag-class
>
        <
body-content
>
empty
</
body-content
>
        <
attribute
>
            <
name
>
url
</
name
>
            <
required
>
true
</
required
>
            <
rtexprvalue
>
true
</
rtexprvalue
>
        </
attribute
>
        <
attribute
>
            <
name
>
result
</
name
>
            <
required
>
true
</
required
>
            <
rtexprvalue
>
true
</
rtexprvalue
>
        </
attribute
>
        <
attribute
>
            <
name
>
params
</
name
>
            <
required
>
false
</
required
>
            <
rtexprvalue
>
true
</
rtexprvalue
>
        </
attribute
>
    </
tag
>
</
taglib
>

3.js

xml 代码

<
%@ page 
contentType
=
"text/html; charset=utf-8"
%
>
<
%@ include 
file
=
"/common/taglibs.jsp"
%
>
<
%@ taglib  
uri
=
"/WEB-INF/numentag.tld"
  
prefix
=
"n"
%
>
<
html
>
<
head
>
</
head
>
<
body
>
<
table
>
<
tr
>
<
td
>
<
n:out
 
url
=
"test.do"
 
result
=
"result"
 
params
=
"${type}"
/>
</
td
>
</
tr
>
</
table
>
</
body
>
</
html
>

源自：http://blog.csdn.net/numen_wlm/archive/2007/01/30/1497778.aspx

评论

4 楼 springdata-jpa 2015-07-09  

java web开发分页demo源代码下载:http://www.zuidaima.com/share/k%E5%88%86%E9%A1%B5-p1-s1.htm

3 楼 375721064 2008-10-09  

写错 Result对象是哪个？

2 楼 375721064 2008-10-09  

Request对象是哪个？

1 楼 gongchangming 2008-06-06  

可将所有参数做成hidden
将每页显示多少行用做成一个资源文件;
不错顶