easyui04:datagrid数据查询

在easyui03上再加了些方法

com.zking.entitypackage com.zking.entity;import java.io.Serializable;/*** 实体类：书籍类* @author zjjt**/
public class Book implements Serializable{private int bid;private String bname;private double bprice;private String btype;public int getBid() {return bid;}public void setBid(int bid) {this.bid = bid;}public String getBname() {return bname;}public void setBname(String bname) {this.bname = bname;}public double getBprice() {return bprice;}public void setBprice(double bprice) {this.bprice = bprice;}public String getBtype() {return btype;}public void setBtype(String btype) {this.btype = btype;}public Book() {// TODO Auto-generated constructor stub}public Book(int bid, String bname, double bprice, String btype) {this.bid = bid;this.bname = bname;this.bprice = bprice;this.btype = btype;}public Book(String bname, double bprice, String btype) {this.bname = bname;this.bprice = bprice;this.btype = btype;}@Overridepublic String toString() {return "Book [bid=" + bid + ", bname=" + bname + ", bprice=" + bprice + ", btype=" + btype + "]";}}

数据库插入的新数据的脚本create table tb_book (bid number not null,bname varchar2(50) not null,bprice float not null,btype varchar2(40) not null,primary key(bid)
)-- 测试数据
insert into TB_BOOK (bid, bname, bprice, btype)
values (1, '西游记', 180, '名著');
insert into TB_BOOK (bid, bname, bprice, btype)
values (2, '红楼梦1', 110.08, '名著');
insert into TB_BOOK (bid, bname, bprice, btype)
values (3, '倚天屠龙记', 150.16, '武侠');
insert into TB_BOOK (bid, bname, bprice, btype)
values (4, '聊斋志异1', 100.12, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (5, '永生', 110.11, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (6, '武动乾坤', 90.89, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (7, '完美世界1', 100, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (8, '万域之王', 56.5, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (9, '遮天1', 130.9, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (10, '凡人修仙传1', 200, '修仙');
insert into TB_BOOK (bid, bname, bprice, btype)
values (11, '倚天屠龙记', 150.16, '武侠');
insert into TB_BOOK (bid, bname, bprice, btype)
values (12, '斗破苍穹', 115.07, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (13, '超级兵王1', 145, '言情');
insert into TB_BOOK (bid, bname, bprice, btype)
values (14, '武极天下', 45.55, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (15, '聊斋志异', 100.12, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (16, '永生1', 110.11, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (17, '武动乾坤', 90.89, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (18, '完美世界', 100, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (19, '万域之王', 56.5, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (20, 'Java', 1000, '修仙');
insert into TB_BOOK (bid, bname, bprice, btype)
values (21, '娃哈哈', 100, '玄幻');
insert into TB_BOOK (bid, bname, bprice, btype)
values (22, '呼啸山庄1', 123, '哈哈');
insert into TB_BOOK (bid, bname, bprice, btype)
values (23, '平凡的世界', 123, '哈哈');
insert into TB_BOOK (bid, bname, bprice, btype)
values (24, '大红底1', 12, '哈哈');
insert into TB_BOOK (bid, bname, bprice, btype)
values (25, '屌丝的逆袭1', 34.67, '哈哈');
insert into TB_BOOK (bid, bname, bprice, btype)
values (26, '嗨害嗨1', 22.3, '哈哈');
commit;

com.zking.daopackage com.zking.dao;import java.util.List;import com.zking.entity.Book;public interface IBookDao {/*** 带模糊查询的分页* @param pageIndex  页数* @param pageSize 每页几条数据* @param str  名称的关键字* @return  结果集合*/public List<Book> getAllByPage(int pageIndex,int pageSize,String str,String col);/*** 获得总行数* @param str  表名等* @return 总行数*/public int getRows(String str);}package com.zking.dao;import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;import com.zking.entity.Book;
import com.zking.util.DBHelper;public class BookDao implements IBookDao{//三兄弟Connection con = null;PreparedStatement ps = null;ResultSet rs = null;@Overridepublic List<Book> getAllByPage(int pageIndex, int pageSize, String str,String col) {List<Book>  list = new ArrayList<Book>();int a =(pageIndex-1)*pageSize+1;int b = pageIndex*pageSize;try {//获得连接con=DBHelper.getCon();//定义SQL语句String sql = "select * from (select a.*,rownum as rid from tb_book a where "+col+" like '%"+str+"%') b  where b.rid between ? and ?";//获得执行对象ps=con.prepareStatement(sql);//给占位符赋值ps.setInt(1, a);ps.setInt(2, b);//获得结果集rs=ps.executeQuery();while(rs.next()) {Book  bb = new Book(rs.getInt(1), rs.getString(2), rs.getDouble(3), rs.getString(4));//加到集合里面去list.add(bb);}} catch (Exception e) {e.printStackTrace();}finally {DBHelper.myClo(con, ps, rs);}return list;}@Overridepublic int getRows(String str) {int n = 0;try {con=DBHelper.getCon();//定义SQL语句String sql = "select count(*) from  "+str;//获得执行对象ps=con.prepareStatement(sql);//获得结果集rs=ps.executeQuery();if(rs.next()) {n=rs.getInt(1);}} catch (Exception e) {e.printStackTrace();}finally {DBHelper.myClo(con, ps, rs);}return n;}}

com.zking.bizpackage com.zking.biz;import java.util.List;import com.zking.entity.Book;public interface IBookBiz {/*** 带模糊查询的分页* @param pageIndex  页数* @param pageSize 每页几条数据* @param str  名称的关键字* @return  结果集合*/public List<Book> getAllByPage(int pageIndex,int pageSize,String str,String col);/*** 获得总行数* @param str  表名等* @return 总行数*/public int getRows(String str);}package com.zking.biz;import java.util.List;import com.zking.dao.BookDao;
import com.zking.dao.IBookDao;
import com.zking.entity.Book;
/*** 业务逻辑层* @author zjjt**/
public class BookBiz implements IBookBiz{IBookDao ibd = new BookDao();@Overridepublic List<Book> getAllByPage(int pageIndex, int pageSize, String str,String col) {return ibd.getAllByPage(pageIndex, pageSize, str,col);}@Overridepublic int getRows(String str) {return ibd.getRows(str);}//    public static void main(String[] args) {
//      System.out.println(ibd.getAllByPage(1, 10, ""));
//  }}

com.zking.servletpackage com.zking.servlet;import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;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.alibaba.fastjson.JSON;
import com.zking.biz.BookBiz;
import com.zking.biz.IBookBiz;
import com.zking.entity.Book;/*** Servlet implementation class BookListServlet*/
@WebServlet("/BookListServlet")
public class BookListServlet extends HttpServlet {protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doPost(request, response);}protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {//设置编码方式request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8");response.setContentType("text/html; charset=UTF-8");//获得outPrintWriter  out =  response.getWriter();int pageIndex=1;int pageSize=10;//接收前台传递过来的值 pageString pid = request.getParameter("page");//当前页码if(pid!=null) {pageIndex=Integer.parseInt(pid);}//接收前台传递过来的值 sizeString size = request.getParameter("rows");//每页多少条if(size!=null) {pageSize=Integer.parseInt(size);}/*//接收文本框关键词String bname = request.getParameter("bname");//关键字if(bname==null) {bname="";//相当于查询全部}*///下拉框String bname = request.getParameter("bname");if(bname==null) {bname="bname";}//System.out.println(bname+"=========");//关键字  文本框String str = request.getParameter("str");if(str==null) {str="";//相当于查询全部}//System.out.println(str+"=========");//servlet调用bizIBookBiz ibb = new BookBiz();//获取总行数int rows = ibb.getRows(" tb_book  where "+bname+" like '%"+str+"%'");//拿到分页的集合List<Book> ls =  ibb.getAllByPage(pageIndex, pageSize,str,bname);//相当于查询所有//前台的JSON数据需要的两个参数： total：总行数 rows：书籍集合Map<String, Object> mym = new HashMap<String, Object>();//放两对值mym.put("total",rows);mym.put("rows", ls);//把map集合变成Jason格式的对象字符串String  b =  JSON.toJSONString(mym);//输送到页面out.write(b);out.flush();out.close();}}

index.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!-- 引入公共页面 -->
<%@ include file="common/head.jsp" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
<script type="text/javascript">$(function(){$('#myTree').tree({    url:ctx+'/moduleServlet' ,//请求地址 Ajaxanimate:true ,//折叠或者展开的时候是否有动画效果onDblClick: function(node){//alert(node.text);  // 在用户双击的时候提示//alert(node.url);//路径//拿到后代节点的集合var cs = $('#myTree').tree('getChildren',node.target);//alert(cs);if(cs.length==0){//没有后代节点var f = $('#myTab').tabs('exists',node.text);//判断是否存在if(!f){//说明不存在//新打开一个选项卡(tab页）$('#myTab').tabs('add',{    title:node.text,//标题content:'<iframe  scrolling="no"  frameborder="0px" width="99%"  height="99%" src="'+node.url+'" ></iframe>', //内容   closable:true, //是否可关闭/* tools:[{    iconCls:'icon-ok',    handler:function(){    alert('想干啥就干啥');    }    }]*/iconCls:node.iconCls});  }else{//说明存在 让其对应选中$('#myTab').tabs('select',node.text);}}}}); })
</script>
</head>
<body class="easyui-layout">   <div data-options="region:'north',split:true" style="height:85px;text-align:center;"><h1>后台书籍管理</h1></div>   <div data-options="region:'south',split:true" style="height:60px;text-align:center;"><b>&copy;玉渊工作室所有,未经允许不可擅自使用</b></div>   <div data-options="region:'west',title:'功能导航',split:false" style="width:150px;"><!--左侧  tree控件  --><ul id="myTree" class="easyui-tree">   </ul>  </div>   <div data-options="region:'center'" style="padding:5px;background:#fff;"><!--中间的tab控件  --><div id="myTab"  data-options="pill:true"  class="easyui-tabs" style="width:100%;height:100%;">   <div  data-options="iconCls:'icon-application-home'" title="首页" style="padding:20px;display:none;">   <img src="data:images/1.jpeg" width="100%" height="100%">  </div>   </div> </div>
</body>
</html>

效果图：

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