1.WEB-INF/tlds/pager.tld
<?xml version="1.0" encoding="UTF-8"?>
<taglib version="2.0" 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 web-jsptaglibrary_2_0.xsd">
<tlib-version>0.9</tlib-version>
<!--标签头-->
<short-name>w</short-name>
<!--将来在页面用taglib引用时的uri属性,这部分的名字可以随便写，只要是符合HTTP网址形式的 -->
<uri>http://javacrazyer.javaeye.com/tags/pager</uri>
<!-- 自定义标签的描述信息 -->
<tag>
<!-- 标签名 -->
<name>pager</name>
<!-- 对应的标签处理类全限定名 -->
<tag-class>com.kington.ibank.util.PagerTag</tag-class>
<!-- 标签主体的类型 -->
<body-content>empty</body-content>
<!-- 当前页号属性的描述信息 -->
<attribute>
<!-- 属性名 -->
<name>pageNo</name>
<!-- 该属性是否为必要的 -->
<required>true</required>
<!-- 属性值是否可以在JSP运行时期动态产生 -->
<rtexprvalue>true</rtexprvalue>
<!-- 属性的数据类型 -->
<type>int</type>
</attribute>
<!-- 总记录数属性的描述信息 -->
<attribute>
<name>recordCount</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
<type>int</type>
</attribute>
<!-- 总页数属性的描述信息 -->
<attribute>
<name>pageSize</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
<type>int</type>
</attribute>
<!-- 分页标签要跳转的URI属性的描述信息 -->
<attribute>
<name>url</name>
<required>true</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.String</type>
</attribute>
</tag>
</taglib>
2.WEB-INF/web.xml
<filter>
<filter-name>securityFilter</filter-name>
<filter-class>com.kington.ibank.webapp.security.SecurityFilter</filter-class>
</filter>
<jsp-config>
<taglib>
<!-- 配置标签的引用地址 JSP页面中引用时使用-->
<taglib-uri>/eltag</taglib-uri>
<!-- 配置标签的TLD文件地址 -->
<taglib-location>/WEB-INF/tlds/ElTag.tld</taglib-location>
</taglib>
<taglib>
<!-- 配置标签的引用地址 JSP页面中引用时使用-->
<taglib-uri>/taglib</taglib-uri>
<!-- 配置标签的TLD文件地址 -->
<taglib-location>/WEB-INF/tlds/TagLib.tld</taglib-location>
</taglib>
<taglib>
<!-- 配置标签的引用地址 JSP页面中引用时使用-->
<taglib-uri>/mypage</taglib-uri>
<!-- 配置标签的TLD文件地址 -->
<taglib-location>/WEB-INF/tlds/pager.tld</taglib-location>
</taglib>
<taglib>
<taglib-uri>/ss3/urlIntercept</taglib-uri>
<taglib-location>/WEB-INF/tlds/security.tld</taglib-location>
</taglib>
</jsp-config>
<listener>
<listener-class>com.kington.ibank.util.SchedulerInit</listener-class>
</listener>
3.PageTag.java
package com.kington.ibank.util;
import java.io.IOException;
import java.util.Enumeration;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.struts2.ServletActionContext;
/**
* 分页标签处理类
*/
public class PagerTag extends TagSupport {
private static final long serialVersionUID = 5729832874890369508L;
private String url; //请求URI
private int pageSize = 20; //每页要显示的记录数
private int pageNo = 1; //当前页号
private int recordCount; //总记录数
@SuppressWarnings("unchecked")
public int doStartTag() throws JspException {
HttpServletRequest request= ServletActionContext.getRequest();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort();
int pageCount = (recordCount + pageSize - 1) / pageSize; //计算总页数
//拼写要输出到页面的HTML文本
StringBuilder sb = new StringBuilder();
if(recordCount == 0){
sb.append("<strong>没有可显示的项目</strong>\r\n");
}else{
//页号越界处理
if(pageNo > pageCount){ pageNo = pageCount; }
if(pageNo < 1){ pageNo = 1; }
sb.append("<form method=\"post\" action=\"").append(basePath+((HttpServletRequest) request).getContextPath()+this.url)
.append("\" name=\"qPagerForm\">\r\n");
//获取请求中的所有参数
Enumeration<String> enumeration = request.getParameterNames();
String name = null; //参数名
String value = null; //参数值
//把请求中的所有参数当作隐藏表单域
while (enumeration.hasMoreElements()) {
name = enumeration.nextElement();
value = request.getParameter(name);
// 去除页号
if (name.equals("pageNo")) {
if (null != value && !"".equals(value)) {
pageNo = Integer.parseInt(value);
}
continue;
}
sb.append("<input type=\"hidden\" name=\"")
.append(name)
.append("\" value=\"")
.append(value)
.append("\"/>\r\n");
}
// 把当前页号设置成请求参数
sb.append("<input type=\"hidden\" name=\"").append("pageNo")
.append("\" value=\"").append(pageNo).append("\"/>\r\n");
// 输出统计数据
/** sb.append(" 共<strong>").append(recordCount)
.append("</strong>项")
.append(",<strong>")
.append(pageCount)
.append("</strong>页: \r\n");**/
sb.append("<ul>");
//上一页处理
if (pageNo == 1) {
sb.append("<li><span class=\"disabled\">上一页")
.append("</span></li>\r\n");
} else {
sb.append("<li><a href=\"javascript:turnOverPage(")
.append((pageNo - 1))
.append(")\">上一页</a></li>\r\n");
}
//如果前面页数过多,显示"..."
int start = 1;
if(this.pageNo > 4){
start = this.pageNo - 1;
sb.append("<li><a href=\"javascript:turnOverPage(1)\">1</a></li>\r\n");
sb.append("<li><a href=\"javascript:turnOverPage(2)\">2</a></li>\r\n");
sb.append("<li><a>…</a></li>\r\n");
}
//显示当前页附近的页
int end = this.pageNo + 1;
if(end > pageCount){
end = pageCount;
}
for(int i = start; i <= end; i++){
if(pageNo == i){ //当前页号不需要超链接
sb.append("<li><span class=\"current\">")
.append(i)
.append("</span></li>\r\n");
}else{
sb.append("<li><a href=\"javascript:turnOverPage(")
.append(i)
.append(")\">")
.append(i)
.append("</a></li>\r\n");
}
}
//如果后面页数过多,显示"..."
if(end < pageCount - 2){
sb.append("<li><a>…</a></li>\r\n");
}
if(end < pageCount - 1){
sb.append("<li><a href=\"javascript:turnOverPage(")
.append(pageCount - 1)
.append(")\">")
.append(pageCount - 1)
.append("</a></li>\r\n");
}
if(end < pageCount){
sb.append("<li><a href=\"javascript:turnOverPage(")
.append(pageCount)
.append(")\">")
.append(pageCount)
.append("</a></li>\r\n");
}
//下一页处理
if (pageNo == pageCount) {
sb.append("<li><span class=\"disabled\">下一页")
.append("</span></li>\r\n");
} else {
sb.append("<li><a href=\"javascript:turnOverPage(")
.append((pageNo + 1))
.append(")\">下一页</a></li>\r\n");
}
// 生成提交表单的JS
sb.append("<script language=\"javascript\">\r\n");
sb.append(" function turnOverPage(no){\r\n");
sb.append(" if(no>").append(pageCount).append("){");
sb.append(" no=").append(pageCount).append(";}\r\n");
sb.append(" if(no<1){no=1;}\r\n");
sb.append(" document.qPagerForm.pageNo.value=no;\r\n");
sb.append(" document.qPagerForm.submit();\r\n");
sb.append(" }\r\n");
sb.append("</script>\r\n");
sb.append("</ul>");
sb.append("</form>\r\n");
}
//把生成的HTML输出到响应中
try {
pageContext.getOut().println(sb.toString());
} catch (IOException e) {
throw new JspException(e);
}
return SKIP_BODY; //本标签主体为空,所以直接跳过主体
}
public void setUrl(String url) {
this.url = url;
}
public void setPageSize(int pageSize) {
this.pageSize = pageSize;
}
public void setPageNo(int pageNo) {
this.pageNo = pageNo;
}
public void setRecordCount(int recordCount) {
this.recordCount = recordCount;
}
}
4.使用这个标签
<c:if test="${not empty pageModel.list}">
<div class="pagination pagination-small pagination-centered">
<c:if test="${reading == 0 }">
<w:pager pageSize="${pageModel.recordPage}" pageNo="${pageModel.curPage}" url="/banks/member/member/messages.jhtml" recordCount="${pageModel.fullListSize}"/>
</c:if>
<c:if test="${reading == 1 }">
<w:pager pageSize="${pageModel.recordPage}" pageNo="${pageModel.curPage}" url="/banks/member/member/messageUnread.jhtml" recordCount="${pageModel.fullListSize}"/>
</c:if>
</div>
</c:if>
5.输出结果：
<div class="pagination pagination-small pagination-centered">
<form method="post" action="http://localhost:8080/ibank/banks/member/member/messageUnread.jhtml" name="qPagerForm">
<input type="hidden" name="reading" value="1"/>
<input type="hidden" name="messagesTotalCount" value="56"/>
<input type="hidden" name="pageNo" value="1"/>
<ul><li><span class="disabled">上一页</span></li>
<li><span class="current">1</span></li>
<li><a href="javascript:turnOverPage(2)">2</a></li>
<li><a>…</a></li>
<li><a href="javascript:turnOverPage(9)">9</a></li>
<li><a href="javascript:turnOverPage(10)">10</a></li>
<li><a href="javascript:turnOverPage(2)">下一页</a></li>
<script language="javascript">
function turnOverPage(no){
if(no>10){ no=10;}
if(no<1){no=1;}
document.qPagerForm.pageNo.value=no;
document.qPagerForm.submit();
}
</script>
</ul>
</form>
</div>