ajax+jquery+json分页demo

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实体类：Book.java

package com.model;

import java.util.Date;

public class Book {
	
	private int id;
	private String name;
	private Date publish_time;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Date getPublish_time() {
		return publish_time;
	}
	public void setPublish_time(Date publish_time) {
		this.publish_time = publish_time;
	}

}


BookDao.java
package com.model;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;

public class BookDao {
	
	public ArrayList<Book> FindBookByPage(Page page) throws SQLException{
	// MySQL select *from t_book limit currentRecord , pageSize
		
		ArrayList<Book> bookls=new ArrayList<Book>();
		Connection con=null;
		PreparedStatement st=null;
		ResultSet rs=null;
		
	     try{
	    	 
	    	 con = JdbcUtils.getConnection();
			    st = con.prepareStatement("select *from t_book limit ?,?");
			    
			    st.setInt(1, page.getCurrentRecord());
			    st.setInt(2, page.getPageSize());
			    rs = st.executeQuery();
			    
			    while(rs.next()){
			    	Book book = new Book();
			    	book.setId(rs.getInt("id"));
			    	book.setName(rs.getString("name"));
			    	book.setPublish_time(rs.getTimestamp("publishtime"));
			    	
			    	bookls.add(book);
			    }
	    	 
	     }finally{
	    	  JdbcUtils.close(rs,st,con);
	     }
		   
	
	
		return bookls;
	}
	
	public int getBookNum() throws SQLException{
		Connection con=null;
		PreparedStatement st=null;
		ResultSet rs=null;
		 int num =0;
		
		try {
		    con = JdbcUtils.getConnection();
		    st = con.prepareStatement("select count(*) from t_book");
		    rs = st.executeQuery();
		    
		    if(rs.next())
	            num = rs.getInt(1);
		    
		    JdbcUtils.close(rs,st,con);
			
		}finally  {
			  JdbcUtils.close(rs,st,con);
		}
		
		return num;
	}
  

}

BookDTO.java

package com.model;


public class BookDTO {
	
	private int id;
	private String name;
	private String str_publish_time;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getStr_publish_time() {
		return str_publish_time;
	}
	public void setStr_publish_time(String str_publish_time) {
		this.str_publish_time = str_publish_time;
	}

}

JdbcUtils.java

package com.model;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public final class JdbcUtils {
	private static String url = "jdbc:mysql://localhost:3306/books";
	private static String user = "root";
	private static String password = "root";

	private JdbcUtils() {
	}

	static {
		try {
			Class.forName("com.mysql.jdbc.Driver");
		} catch (ClassNotFoundException e) {
			throw new ExceptionInInitializerError(e);
		}
	}

	public static Connection getConnection() throws SQLException {
		return DriverManager.getConnection(url, user, password);
	}

	public static void close(ResultSet rs, PreparedStatement st, Connection conn) {
		try {
			if (rs != null)
				rs.close();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			try {
				if (st != null)
					st.close();
			} catch (SQLException e) {
				e.printStackTrace();
			} finally {
				if (conn != null)
					try {
						conn.close();
					} catch (SQLException e) {
						//todo log4j
						e.printStackTrace();
					}
			}
		}
	}
}

Page.java

package com.model;

/*
 * 这个Page 可以对所有的 实体进行分页显示
 * 
 * curuentPage--->currentRecord 
 * 
 * 
 */
public class Page {
    private int totalRecord;//总的记录条数
    private int totalPage;//总页数
    
    private int currentPage=1;//当前页数
    
    private int currentRecord;//当前记录的条数
    
    private int pageSize=3 ;//每页显示的记录数量,这里默认每页显示6条
     
    
  // MySQL select *from t_book limit currentRecord , pageSize
   
    public int getCurrentPage() {
        return currentPage;
    }
    public void setCurrentPage(int currentPage ) {
       this.currentPage = currentPage;
    }
    public int getTotalPage() {
        return totalPage;
    }
    public void setTotalPage(int totalRecord,int pageSize) {
        //如果总记录数除以每页显示条数可以整除，商就是总页码
        if(totalRecord%pageSize == 0) 
        {
            totalPage = totalRecord/pageSize;
        }else
        {
           //如果总记录数除以每页显示条数不能整除，商加1才是总页码
            totalPage = totalRecord/pageSize+1;
        }
    }
    public int getCurrentRecord() {
        return currentRecord;
    }
    public void setCurrentRecord(int currentPage,int pageSize) {
        //该页的  第一条记录 =( 当前页号-1)*pageSize;  页号从0开始编制
        this.currentRecord = (currentPage-1 )*pageSize;
    }
    public int getPageSize() {
        return pageSize;
    }
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
    
    public int getTotalRecord() {
        
        return totalRecord;
    }
    public void setTotalRecord(int totalRecord) {
        this.totalRecord = totalRecord;
    }
    
}

=============servlet================

Book_ShowServlet.java

package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONSerializer;



import com.model.Book;
import com.model.BookDTO;
import com.model.BookDao;
import com.model.Page;


@SuppressWarnings("serial")
public class Book_ShowServlet extends HttpServlet {


    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

       doPost(request,response);
    }

    
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
             {
        response.setContentType("text/html");
   
        BookDao dao=new BookDao();
        Page page=new Page();
        try {
            page.setTotalRecord(dao.getBookNum());
            page.setCurrentPage(1);
            page.setPageSize(6);
            page.setTotalPage(page.getTotalRecord(), page.getPageSize());
            page.setCurrentRecord(page.getCurrentPage(), page.getPageSize());
        } catch (SQLException e1) {
            // TODO Auto-generated catch block
            
            e1.printStackTrace();
            
        }
        String pageindex=request.getParameter("pagehash"); 
        if(pageindex!=null){
            int targetpage = Integer.parseInt(pageindex);
            if(targetpage>=1&&targetpage<=page.getTotalPage()){
                
                page.setCurrentPage(targetpage);
                page.setCurrentRecord(page.getCurrentPage(), page.getPageSize());
                
            }
            
        }
        
        ArrayList<Book> books = null;
        try {
            books = dao.FindBookByPage(page);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        ArrayList<BookDTO> bookdtos = BookToBookDTO(books);
        
        String doc = JSONSerializer.toJSON(bookdtos).toString();

        System.out.println("传送JSION"+doc);
    
        PrintWriter out = response.getWriter();
        out.print(doc);     
        
    }


    private ArrayList<BookDTO> BookToBookDTO(ArrayList<Book> books) {
        //把books 输出成xml文档
        //String doc = JSONUtils.valueToString(books);
        //books---->booksDTO
        ArrayList<BookDTO> bookdtos = new ArrayList<BookDTO>();
        for(int i=0;i<books.size();i++){
            
            BookDTO dto =new BookDTO();
            dto.setId(books.get(i).getId());
            dto.setName(books.get(i).getName());
            dto.setStr_publish_time(books.get(i).getPublish_time().toString());
            
            bookdtos.add(dto);
            
        }
        return bookdtos;
    }

}

LoginServlet.java

package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.util.regex.Pattern;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet
{
    
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        
        this.doPost(request, response);
        
    }
    
    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException
    {
        
        response.setContentType("text/html");
        //response.setCharacterEncoding("gb2312");
        
        PrintWriter out = response.getWriter();
        
        String type = request.getParameter("type");
        
        if (type != null)
        {
            String isoname = request.getParameter("name");
            //  String name=new String(isoname.getBytes("iso8859-1"),"UTF-8");
            String name = URLDecoder.decode(isoname, "UTF-8");
            
            String password = request.getParameter("password");
            if ("ajaxcheck".equals(type))
            {
                
                if (!name.equals("yzy"))
                    out.print("username  " + name + "  is not exgist");
            }
            if ("submit".equals(type))
            {
                
                //通过正则表达式 对密码进行验证
                String errorMsg = "";
                if (!Pattern.compile("^[0-9a-zA-Z\u4e00-\u9fa5]+$")
                        .matcher(password)
                        .matches())
                {
                    errorMsg = "密码必须由数字字母组成";
                    response.sendRedirect("index.jsp?errorMsg=" + errorMsg);
                    
                }
                else
                {
                    if (name.equals("yzy") && password.equals("123"))
                        response.sendRedirect("show.jsp");
                    else
                    {
                        errorMsg = "用户名或密码错误";
                        response.sendRedirect("index.jsp?errorMsg=" + errorMsg);
                    }
                    
                }
                
            }
            
        }
        
    }
    
}

================jsp===

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
	<head>
		<base href="<%=basePath%>">

		<title>My JSP 'index.jsp' starting page</title>
		<meta http-equiv="pragma" content="no-cache">
		<meta http-equiv="cache-control" content="no-cache">
		<meta http-equiv="expires" content="0">
		<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
		<meta http-equiv="description" content="This is my page">
		<script type="text/javascript" src="jquery-1.4.2.min.js"></script>

		<script>
		$(function(){
		   
		    $("#name").blur(function(){
		     
		        var name=$("#name").val();
		 //  var name=encodeURI($("#name").val());
		 //    var name=encodeURI(encodeURI($("#name").val()));
		        
		        
		      
		     //   if(isChinaOrNumbOrLett(name))
		           $.post("LoginServlet",{ type:"ajaxcheck",name:name},function(data){$("#namecheck").text(data);} )
		    //    else 
		    //       alert("用户名必须由汉字、字母、数字组成 ");
		    });
		
	      
		});
		
		/* 
			用途：检查输入字符串是否只由汉字、字母、数字组成 
			输入： 
			value：字符串 
			返回： 
			如果通过验证返回true,否则返回false 
			*/ 
			function isChinaOrNumbOrLett(s) {//判断是否是汉字、字母、数字组成 
				var regu = "^[0-9a-zA-Z\u4e00-\u9fa5]+$"; 
				
				var re = new RegExp(regu); 
				
				if (re.test(s)) { 
				return true; 
				} else { 
				return false; 
				} 
			} 

		
	</script>
	</head>

	<body>
		<center>
			欢迎登陆FaceBook
			<form action="LoginServlet?type=submit" method="post">

				用户名；
				<input type="text" name="name" id="name" />
				<div id="namecheck"></div>


				密 码：
				<input type="password" name="password" />
				<div id="passwordcheck"></div>
				<%
               String msg = request.getParameter("errorMsg");
               if(msg!=null){
                      out.println(msg);   
               }         
           %>

				<input type="submit" value="提交" />

			</form>
			<a href="/show.jsp"> aaa</a>

		</center>

	</body>
</html>

show.jsp

<%@ page language="java" import="java.util.*,com.model.*" pageEncoding="gb2312"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'pageInfo.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<script type="text/javascript" src="jquery-1.4.2.min.js"></script>
	<STYLE>
		A:hover { color:red; text-transform:uppercase; letter-spacing:1cm }
    </STYLE>
	 <script>
	 	var loadFinish = function(data)
	 	{
	 		var bookinfo = "";
	 		var books = $.parseJSON(data);
	 		for(var i=0;i<books.length;i++)
	 		{
	 			var book = books[i];
	 		
	 			bookinfo = bookinfo+ book.id + book.name+book.str_publish_time +"<br/> " ;
	 			
	 		}
	 		$("#list").html(bookinfo);
	 	}
		$(function(){
		
		    //设置 超链接不可以使用
			//$("a").css({disabled:disabled});
			
		    var hash = document.location.hash;
		    //如果不含有# 说明是第一次来的这个页面
		    if(!hash){showBooksInfo(1);}
		    $("#first").click(function(){ showBooksInfo(1);});
            $("#next").click(function(){ showBooksInfo(parseInt( document.location.hash.split("#")[1])+1);});
		    
			$("#previous").click(function(){ showBooksInfo(parseInt( document.location.hash.split("#")[1])-1);});
		    
			} );
			function showBooksInfo(int_pagehash)
			{   //设置地址栏hash
			      
			      document.location.hash = int_pagehash;
			   
			     $.post("Book_ShowServlet",{pagehash:int_pagehash},loadFinish);
			     
			}
			
		 
	</script>
	
  </head>
  
  <body>
    <div id="list">
    
    </div>
    
    <table>
        <tr>
           <td><a id="first" href="javascript:void(0)" >首页</a></td>
           <td><a id="next" href="javascript:void(0)">下一页   </a></td>
           <td><a id="previous" href="javascript:void(0)">上一页   </a></td>
        </tr>
    </table>
     
  </body>
</html>

======jar===

json-lib-2.1.jar

ezorph-1.0.3.jar

jstl-1.2.jar

commons-beanutils-1.7.0.jar

commons-collections-3.2.jar

commons-lang-2.3.jar

commons-logging-1.0.4.jar

commons-logging-api-1.1.jar

standard.jar

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ajax+json自动提示Demo | oracle索引

2012-08-15 17:55
浏览 5681
评论(2)
分类:Web前端
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2 楼 w-mamba 2015-01-20

适合初学者学习，蛮好…

1 楼 Franciswmf 2013-06-27

看着不错

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