jsp+servlet+mysql实现分页处理
jsp+servlet+mysql实现带有模糊查询的分页
解决方法:
1.将分页的独立成一个新的pagination.jsp 需要用的时候使用动作指令jsp includie导入即可使用
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<div class="am-cf">
共 ${param.total } 条记录
<div class="am-fr">
<ul class="am-pagination">
<li>
<a href="${param.url }&page=${param.curPage-1}&searchContent=${param.searchContent}">«</a>
</li>
<span>第${param.curPage }页 / 共${param.totalPage }页</span>
<!--<li class="am-active">
<a href="#">1</a>
</li>
<li>
<a href="#">2</a>
</li>
<li>
<a href="#">3</a>
</li>
<li>
<a href="#">4</a>
</li>
<li>
<a href="#">5</a>
</li>-->
<li>
<a href="${param.url }&page=${param.curPage+1}&searchContent=${param.searchContent}">»</a>
</li>
</ul>
</div>
</div>
</body>
</html>
2.创建一个servlet 进行数据库查询 查询需要的数据
package com.chinasofti.dormsystem.servlet;
import java.io.IOException;
import java.sql.SQLException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.chinasofti.dormsystem.beans.Handle;
import com.chinasofti.dormsystem.beans.Pagination;
import com.chinasofti.dormsystem.service.adminService;
/**
* 报修处理表 增删查改
*/
@WebServlet("/admin/HandleFind")
public class HandleFind extends HttpServlet {
;
adminService service=new adminService();
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
String oper=request.getParameter("oper");
if("load".equals(oper)) {
paging(request, response);
}
}
private void paging(HttpServletRequest request, HttpServletResponse response) throws IOException {
String searchContent=request.getParameter("search");
String page=request.getParameter("page");
if(page==null||Integer.parseInt(page)<1) {
page="1";
}
String pageSize=request.getParameter("pageSize");
if(pageSize==null) {
pageSize="5";
}
//开始查询的地方
int starIndex =(Integer.parseInt(page)-1)*(Integer.parseInt(pageSize));
try {
//获取总条数
int total = service.pagingcout( searchContent);
if(total!=0) {
Pagination paging=new Pagination(searchContent,page, pageSize, total);
//获取每一页的内容
List<Handle> reslist = service.pagingHandle(searchContent,(paging.getCurPage()-1)*Integer.parseInt(pageSize), Integer.parseInt(pageSize));
request.setAttribute("paging", paging);
request.setAttribute("handlers", reslist);
}else {
request.setAttribute("Notrs", "没有查询结果");
}
request.getRequestDispatcher("/admin/findHandle.jsp").forward(request, response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
### 查询数据库 获取数据总数，每一页的数据
```java
public List<Handle> pagingHandle(String searchContent, int start, int pageSize) throws SQLException {
return admin.pagingHandle(searchContent, start, pageSize);
}
//查询报修处理表的总数目
public int pagingcout(String searchContent) throws SQLException {
return admin.cout(searchContent);
}
/**
* 分页查询报修信息表
* @param searchContent
* @param start
* @param pageSize
* @return
* @throws SQLException
*/
public List<Handle> pagingHandle(String searchContent, int start ,int pageSize) throws SQLException {
// TODO Auto-generated method stub
Object o=null;
if(searchContent != null &&!"".equals(searchContent)) {
String sql="SELECT handle.*, USER.`userName` FROM handle,USER WHERE handle.`handler`=user.`userId`&& content like ? ORDER BY handle.handleDate DESC limit ?,? ";
o = qrWith.query(sql, new BeanListHandler(Handle.class), new Object[] {"%"+searchContent+"%",start,pageSize});
}else {
String sql="SELECT handle.*, USER.`userName` FROM handle,USER WHERE handle.`handler`=user.`userId` ORDER BY handle.handleDate DESC limit ?,? ";
o = qrWith.query(sql, new BeanListHandler(Handle.class), new Object[] {start,pageSize});
}
if(o!=null) {
List<Handle> o1=(List<Handle>) o;
return o1;
}
return null;
}
/**、
* 查询报修处理表总数
* @param searchContent
* @return
* @throws SQLException
*/
public int cout(String searchContent) throws SQLException {
Long o=null;
if(searchContent != null &&!"".equals(searchContent)) {
String sql="select count(*) from handle WHERE content like ? ";
o = (Long)qrWith.query(sql,new ScalarHandler() ,new Object[] {"%"+searchContent+"%"});
}else {
String sql="select count(*) from handle";
o = (Long)qrWith.query(sql,new ScalarHandler());
}
return o.intValue();
}
引用分页的jsp
<jsp:include page="/WEB-INF/jsp/pagination.jsp">
<jsp:param name="url" value="${pageContext.request.contextPath}/admin/HandleFind?oper=load" />
<jsp:param name="curPage" value="${paging.curPage }"/>
<jsp:param name="pageSize" value="${paging.pageSize }" />
<jsp:param name="total" value="${paging.total }" />
<jsp:param name="totalPage" value="${paging.totalPage}"/>
</jsp:include>