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JSP教程:jspservletjavaBean后台分页实例代码解析

 [ 2017年6月28日 ] 【

  首先后台分页需要理清分页思路,把数据库里面需要分页的信息放到List集合中,然后按照页面反馈给后台的页码对List集合进行SubList切割把切完的List传到前端进行显示。

  1.分页的demo文件结构图

  导入的包

  2.代码

  SplitPageServlet代码

  ?

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package ActionServlet;
 
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
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 Bean.ProjectBean;
import Service.SplitPage;
 
/**
 * Servlet implementation class SplitPageServlet
 */
@WebServlet("/SplitPageServlet")
public class SplitPageServlet extends HttpServlet {
 private static final long serialVersionUID = 1L;
   
 /**
  * @see HttpServlet#HttpServlet()
  */
 public SplitPageServlet() {
  super();
  // TODO Auto-generated constructor stub
 }
 
 /**
  * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
  */
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  ListlistArr = new ArrayList();
  String currrentPageString = request.getParameter("currrentPage");
  String numberForSplitPage = request.getParameter("numberForSplitPage");
  if( currrentPageString ==null){
   currrentPageString = "1";
  }
  if( numberForSplitPage == null){
   numberForSplitPage = "5";
  }
  SplitPage splitPage = new SplitPage();
  try {
   listArr = splitPage.AllSplitPage(numberForSplitPage, currrentPageString);
   request.setAttribute("subResult", listArr);
  } catch (ClassNotFoundException | SQLException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  System.out.println(SplitPage.pageNumber);
  System.out.println(SplitPage.currentPageIndex);
  request.setAttribute("pageNumber", SplitPage.pageNumber);
  request.setAttribute("currentPageIndex", SplitPage.currentPageIndex);
  request.getRequestDispatcher("/servlet/ShowViewIndex").forward(request, response);
   
 }
 
 /**
  * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
  */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  // TODO Auto-generated method stub
  doGet(request, response);
 }
 
}

  ProjectBean代码

  ?

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package Bean;
 
public class ProjectBean {
 private String projectId = null;
 private String projectName = null;
 private String projectType = null;
 private String userNo = null;
 private String projectUser = null;
 public String getProjectId(){
  if(projectId==null){
   projectId ="";
  }
  return this.projectId;
 }
 public void setProjectId(String projectId){
  this.projectId = projectId;
 }
  
 public void setProjectName(String projectName){
  this.projectName = projectName;
 }
  
 public String getProjectName(){
  return this.projectName;
 }
  
 public void setType(String projectType){
  this.projectType = projectType;
 }
  
 public String getProjectType(){
  return this.projectType;
 }
  
 public void setUserNo(String userNo){
  this.userNo = userNo;
 }
  
 public String getUserNo(){
  return this.userNo;
 }
  
 public void setProjectUser(String projectUser){
  this.projectUser = projectUser;
 }
  
 public String getProjectUser(){
  return this.projectUser;
 }
  
}
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