spring+hibernate+struts2 annotation实现分页（3）
这几天写了个ssh2分页实现，放到博客里留个记号，先贴代码有空再写说明了
struts2自定义标签实现
在WEB-INF目录下新建一个tlds目录，PageTags.tld放置在tlds目录里
PageTags.tld
css样式自己写个就可以
效果看附件（点击看原图）
struts2自定义标签实现
package com.xangqun.tag;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.components.Component;
import org.apache.struts2.views.jsp.ComponentTagSupport;
import com.opensymphony.xwork2.util.ValueStack;
public class PageStruts2Tag extends ComponentTagSupport{
private static final long serialVersionUID = 1L;
private int totalPage; //总页数
private int currentPage; //当前页
private int totalCount; //总数
private int displayNum=10; //页面显示的页数
private boolean isDisplaySelect= true; //是否显示选择框
private boolean isDisplayGoToPage= false; //是否显示输入框
private String style="infoPage"; //样式id
@Override
public Component getBean(ValueStack stack, HttpServletRequest req,
HttpServletResponse res) {
return new PageStrutsTwo(stack);
}
@Override
protected void populateParams() {
super.populateParams();
PageStrutsTwo pst=(PageStrutsTwo)component;
pst.setCurrentPage(currentPage);
pst.setDisplayGoToPage(isDisplayGoToPage);
pst.setDisplayNum(displayNum);
pst.setDisplaySelect(isDisplaySelect);
pst.setTotalCount(totalCount);
pst.setTotalPage(totalPage);
pst.setStyle(style);
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
public void setTotalCount(int totalCount) {
this.totalCount = totalCount;
}
public void setDisplayNum(int displayNum) {
this.displayNum = displayNum;
}
public void setDisplaySelect(boolean isDisplaySelect) {
this.isDisplaySelect = isDisplaySelect;
}
public void setDisplayGoToPage(boolean isDisplayGoToPage) {
this.isDisplayGoToPage = isDisplayGoToPage;
}
public void setStyle(String style) {
this.style = style;
}
}
package com.xangqun.tag;
import java.io.Writer;
import java.net.URLEncoder;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.components.Component;
import com.opensymphony.xwork2.util.ValueStack;
public class PageStrutsTwo extends Component {
private int totalPage; //总页数
private int currentPage; //当前页
private int totalCount; //总数
private int displayNum=10; //页面显示的页数
private boolean isDisplaySelect= true; //是否显示选择框
private boolean isDisplayGoToPage= false; //是否显示输入框
private String style="infoPage"; //样式id
public PageStrutsTwo(ValueStack stack) {
super(stack);
}
@Override
public boolean start(Writer writer) {
boolean result = super.start(writer);
try{
StringBuilder str=new StringBuilder(1024);
String cleanUrl=getCleanUrl();
boolean isValid=true;
isValid =(this.getStack().findValue(String.valueOf(totalPage))== null && this.getStack().findValue(String.valueOf(totalCount))== null) ? false : true;
if (isValid) {
str.append("<div id='").append(style).append("'><ul>");
if (currentPage > 1) {
str.append("<li><a href='" + getCompleteUrl(cleanUrl, currentPage - 1) +
"' class='upPage' title='上一页'></a></li>");
} else {
str.append("<li><a class='upPage' title='目前已是第一页'></a></li>");
}
if (displayNum == 0) {
str.append("<li class='pages'><span class='currentPage'>" + currentPage + "</span>/" + totalPage + "</li>");
} else {
int pagenumber = displayNum;
int pagecenter = pagenumber / 2 - 1;
int pagebet = pagenumber / 2 + 1;
int beginPage = 1;
int endPage = 1;
if (currentPage < pagebet) {
beginPage = 1;
} else {
beginPage = currentPage - pagecenter;
}
if (currentPage + pagecenter > totalPage) {
endPage = totalPage;
} else {
endPage = currentPage + pagecenter;
}
if (currentPage + pagecenter < pagenumber) {
endPage = pagenumber;
}
if (endPage - currentPage < pagecenter) {
beginPage = totalPage - (pagenumber - 1);
if (beginPage != 1) {
beginPage += 1;
}
}
if (beginPage <= 0) {
beginPage = 1;
}
if (endPage > totalPage) {
endPage = totalPage;
}
if (currentPage >= pagebet && beginPage != 1) {
str.append("<li><a href='" + getCompleteUrl(cleanUrl, 1) +
"' class='everyPage'>1</a></li>");
if (currentPage != pagebet) {
str.append("<li>... </li>");
}
}
for (int i = beginPage; i <= endPage; i++) {
StringBuilder item=new StringBuilder(1024);
if (i != currentPage) {
item.append("<li><a href='" + getCompleteUrl(cleanUrl, i) +
"' class='everyPage'>" + i +
"</a></li>");
} else {
item.append("<li><a class='nowPage'>" + i +
"</a></li>");
}
str.append(item);
}
}
if (currentPage < totalPage) {
str.append("<li><a href='" + getCompleteUrl(cleanUrl, currentPage + 1) +
"' class='downPage' title='下一页'></a></li>");
} else {
str.append("<li><a class='downPage' title='目前已是最后一页'></a></li>");
}
boolean isSelect = isDisplaySelect;
if (isDisplayGoToPage) {
isSelect = false;
str.append("<li> 到第 <input id='inputPage' value='" + currentPage + "'/> 页</li>");
StringBuilder script =new StringBuilder("javascript:var goPage=this.parentNode.parentNode.getElementsByTagName('input')[0].value;if(isNaN(goPage)||goPage>"
+ totalPage + "||goPage<1||goPage==" + currentPage + ")return;document.location='" + getCompleteUrlNoParam(cleanUrl)
+ "page='+goPage;return false;");
str.append("<li><a href='javascript:;' onclick=\"" + script + "\" class='goToPage'></a></li>");
}
if (isSelect) {
str.append("<li> 到第 <select name='select2' onchange=\"window.location.href='" +
getCompleteUrlNoParam(cleanUrl) +
"page='+this.options[this.selectedIndex].value + ''\">");
for (int iCount = 1; iCount <= totalPage; iCount++) {
String strSelected = "";
if (iCount == currentPage) {
strSelected = "selected";
}
str.append("<option value='" + iCount + "' " + strSelected + ">-" +
iCount + "-</option>");
}
str.append("</select> 页</li>");
}
str.append("</ul></div>");
}
writer.write(str.toString());
}catch (Exception e) {
}
return result;
}
private String getCompleteUrlNoParam(String reqUrl) {
if (reqUrl.indexOf("?") > 0) {
return reqUrl + "&";
} else {
return reqUrl + "?";
}
}
private String getCompleteUrl(String reqUrl, int page) {
if (reqUrl.indexOf("?") > 0) {
return reqUrl + "&page=" + page;
} else {
return reqUrl + "?page=" + page;
}
}
private String getCleanUrl() throws Exception {
HttpServletRequest request=(HttpServletRequest)ServletActionContext.getRequest();
Map parameters=request.getParameterMap();
boolean isFirst=true;
Set entries=parameters.entrySet();
Iterator it=entries.iterator();
//TODO
//这里的方法可以根据需要修改下
String reqUrl=(String)request.getAttribute("struts.request_uri");
HttpServletResponse response=(HttpServletResponse)ServletActionContext.getResponse();
while(it.hasNext()){
Map.Entry entry = (Map.Entry) it.next();
String Name = (String) entry.getKey();
String[] Value = (String[]) entry.getValue();
String[] temp = new String[Value.length];
for (int i = 0; i < Value.length; i++) {
temp[i] = Value[i];
}
for (int i = 0; i < Value.length; i++) {
temp[i] = URLEncoder.encode(temp[i], "GBK");
}
if (Name.equalsIgnoreCase("page") == false) {
for (int j = 0; j < temp.length; j++) {
if (temp[j]!=null||temp[j]!="") {
if (isFirst) {
isFirst = false;
reqUrl += "?" + Name + "=" + temp[j];
} else {
String param = "&" + Name + "=" + temp[j];
String param2 = "&" + Name + "=" + temp[j] + "&";
if (reqUrl.indexOf(param2) < 0) {
if (reqUrl.endsWith(param) == false) {
reqUrl += "&" + param;
}
}
}
}
}
}
}
return response.encodeURL(reqUrl);
}
public int getTotalPage() {
return totalPage;
}
public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
public int getTotalCount() {
return totalCount;
}
public void setTotalCount(int totalCount) {
this.totalCount = totalCount;
}
public int getDisplayNum() {
return displayNum;
}
public void setDisplayNum(int displayNum) {
this.displayNum = displayNum;
}
public boolean isDisplaySelect() {
return isDisplaySelect;
}
public void setDisplaySelect(boolean isDisplaySelect) {
this.isDisplaySelect = isDisplaySelect;
}
public boolean isDisplayGoToPage() {
return isDisplayGoToPage;
}
public void setDisplayGoToPage(boolean isDisplayGoToPage) {
this.isDisplayGoToPage = isDisplayGoToPage;
}
public String getStyle() {
return style;
}
public void setStyle(String style) {
this.style = style;
}
}
在WEB-INF目录下新建一个tlds目录，PageTags.tld放置在tlds目录里
PageTags.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>pageTags</short-name>
<uri>/PageTags</uri>
<display-name>pageTags</display-name>
<description></description>
<tag>
<name>PageStruts2Tag</name>
<tag-class>com.xangqun.tag.PageStruts2Tag</tag-class>
<body-content>JSP</body-content>
<display-name>pageStruts2Tag</display-name>
<attribute>
<name>totalPage</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>int</type>
</attribute>
<attribute>
<name>currentPage</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>int</type>
</attribute>
<attribute>
<name>style</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.String</type>
</attribute>
<attribute>
<name>totalCount</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>java.lang.String</type>
</attribute>
<attribute>
<name>displayNum</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>int</type>
</attribute>
<attribute>
<name>isDisplaySelect</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>boolean</type>
</attribute>
<attribute>
<name>isDisplayGoToPage</name>
<required>false</required>
<rtexprvalue>true</rtexprvalue>
<type>boolean</type>
</attribute>
</tag>
</taglib>
css样式自己写个就可以
<%@ page language="java" contentType="text/html; charset=gbk"
pageEncoding="gbk"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<%@ taglib uri="/PageTags" prefix="pageTags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<title>demo</title>
<link rel="stylesheet" type="text/css" href="css/page.css" />
</head>
<body>
<s:iterator value="pagination.list" var="p">
${p.name}
</s:iterator>
<pageTags:PageStruts2Tag currentPage="${pagination.currentPage}" totalPage="${pagination.totalPage}" totalCount="${pagination.totalCount}" displayNum="6" />
</body>
</html>
效果看附件（点击看原图）