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Jquery之datagrid查询 Jquery之datagrid查询详解

小丸子✘   2021-09-14 我要评论
想了解Jquery之datagrid查询详解的相关内容吗小丸子✘在本文为您仔细讲解Jquery之datagrid查询的相关知识和一些Code实例欢迎阅读和指正我们先划重点:Jquerydatagrid,datagrid查询下面大家一起来学习吧

在Tree的项目上增加代码;

一、点击左侧菜单;右侧Tab页显示相关信息(死数据)

1、存放右侧相关信息页面(userManage.jsp)

①、使用Javascript加载数据

<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/book.js"></script>

②、隐藏域(给book.jsp全路径名)

<input type="hidden" id="ctx" value="${pageContext.request.contextPath }">

<%@ 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>存放书籍页面</title>
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/jquery-easyui-1.5.1/themes/default/easyui.css">   
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/jquery-easyui-1.5.1/themes/icon.css">   
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/jquery-easyui-1.5.1/jquery.min.js"></script>   
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/jquery-easyui-1.5.1/jquery.easyui.min.js"></script>  
<script type="text/javascript" src="${pageContext.request.contextPath }/static/js/book.js"></script>
</head>
<body>
<input type="hidden" id="ctx" value="${pageContext.request.contextPath }">
<table id="dg"></table> 
</body>
</html>

2、点击左侧菜单显示对应页面

①、datagrid_data1.json(数据)

{"total":28,"rows":[
	{"productid":"FI-SW-01","productname":"Koi","unitcost":10.00,"status":"P","listprice":36.50,"attr1":"Large","itemid":"EST-1"},
	{"productid":"K9-DL-01","productname":"Dalmation","unitcost":12.00,"status":"P","listprice":18.50,"attr1":"Spotted Adult Female","itemid":"EST-10"},
	{"productid":"RP-SN-01","productname":"Rattlesnake","unitcost":12.00,"status":"P","listprice":38.50,"attr1":"Venomless","itemid":"EST-11"},
	{"productid":"RP-SN-01","productname":"Rattlesnake","unitcost":12.00,"status":"P","listprice":26.50,"attr1":"Rattleless","itemid":"EST-12"},
	{"productid":"RP-LI-02","productname":"Iguana","unitcost":12.00,"status":"P","listprice":35.50,"attr1":"Green Adult","itemid":"EST-13"},
	{"productid":"FL-DSH-01","productname":"Manx","unitcost":12.00,"status":"P","listprice":158.50,"attr1":"Tailless","itemid":"EST-14"},
	{"productid":"FL-DSH-01","productname":"Manx","unitcost":12.00,"status":"P","listprice":83.50,"attr1":"With tail","itemid":"EST-15"},
	{"productid":"FL-DLH-02","productname":"Persian","unitcost":12.00,"status":"P","listprice":23.50,"attr1":"Adult Female","itemid":"EST-16"},
	{"productid":"FL-DLH-02","productname":"Persian","unitcost":12.00,"status":"P","listprice":89.50,"attr1":"Adult Male","itemid":"EST-17"},
	{"productid":"AV-CB-01","productname":"Amazon Parrot","unitcost":92.00,"status":"P","listprice":63.50,"attr1":"Adult Male","itemid":"EST-18"}
]}

②、index.js(赋予右侧相关信息的页面地址)

③、使用File处理来自WebContent的JSON数据

根据id内容获得全路径名

url:$("#ctx").val()+'/datagrid_data1.json'

$(function() {
	$('#dg').datagrid({    
	    url:$("#ctx").val()+'/datagrid_data1.json',    
	    columns:[[    
	        {field:'productid',title:'id',width:100},    
	        {field:'productname',title:'名称',width:100},    
	        {field:'unitcost',title:'价格',width:100,align:'right'}    
	    ]]    
	}); 
})

3、显示界面

二、造数据(使用数据库数据)

人员信息维护在数据库在选择书籍表绑定

1、entity、dao、web

①、实体类

package com.mwy.entity;
public class Book {
	private int bid;
	private String bname;
	private float price;
	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 float getPrice() {
		return price;
	}
	public void setPrice(float price) {
		this.price = price;
	}
	@Override
	public String toString() {
		return "Book [bid=" + bid + ", bname=" + bname + ", price=" + price + "]";
	}
	public Book(int bid, String bname, float price) {
		super();
		this.bid = bid;
		this.bname = bname;
		this.price = price;
	}
	public Book() {
		// TODO Auto-generated constructor stub
	}
}

②、BookDao 继承 BaseDao<Book>

package com.mwy.dao;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.mwy.entity.Book;
import com.zking.util.BaseDao;
import com.zking.util.PageBean;
import com.zking.util.StringUtils;
public class BookDao extends BaseDao<Book>{
	public List<Book> list(Book book, PageBean pageBean) throws Exception {
		String sql="select * from t_mvc_book where 1=1";
		String bname=book.getBname();
		if(StringUtils.isNotBlank(bname)) {
			sql+=" and bname like '%"+bname+"%'";
		}
		return super.executeQuery(sql, Book.class, pageBean);
	}
}

③、 BookAction 继承ActionSupport 实现 ModelDriver<Book>

package com.mwy.web;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.mwy.dao.BookDao;
import com.mwy.entity.Book;
import com.zking.framework.ActionSupport;
import com.zking.framework.ModelDriver;
import com.zking.util.PageBean;
import com.zking.util.ResponseUtil;
public class BookAction extends ActionSupport implements ModelDriver<Book>{
	private Book book=new Book();
	private BookDao bd=new BookDao();
	public String datagrid(HttpServletRequest req, HttpServletResponse resp) throws Exception {
		//选中内容想try:Ctrl+Shift+z
		BookDao bd=new BookDao();
		PageBean pageBean=new PageBean();
        pageBean.setRequest(req);
        //后面需要修改
		List<Book> list = bd.list(new Book(),pageBean);
		ObjectMapper om=new ObjectMapper();
		//Json数组
//		System.out.println(om.writeValueAsString(list));
		//转为Json对象
		Map<String, Object> map=new HashMap<String, Object>();
		map.put("total", pageBean.getTotal());
		map.put("rows", list);
		ResponseUtil.writeJson(resp, map);
		System.out.println(om.writeValueAsString(map));
		return null;
	}
	@Override
	public Book getModel() {
		// TODO Auto-generated method stub
		return book;
	};
}

④、配置mvc2.xml

<?xml version="1.0" encoding="UTF-8"?>
<config>
	<action path="/menu" type="com.mwy.web.MenuAction">
	</action>
	<action path="/book" type="com.mwy.web.BookAction">
	</action>
</config>

⑤、使用File处理来自WebContent的JSON数据

$(function() {
	$('#dg').datagrid({    
	    url:$("#ctx").val()+'/book.action?methodName=datagrid',    
	    columns:[[    
	        {field:'bid',title:'id',width:100},    
	        {field:'bname',title:'名称',width:100},    
	        {field:'price',title:'价格',width:100,align:'right'}    
	    ]]    
	}); 
})

⑥、得到界面

2、增加分页

①、api中找到相应属性

②、在book.js中增加属性

③、分页后界面

④、fitColumns:true,增加该属性填充列;

3、封装重复代码(链式编程)

①、封装

package com.zking.util;
import java.util.HashMap;
public class R extends HashMap{
	public R data(String key,Object value) {
		this.put(key, value);
		return this;
	}
}

②、改变BookAction代码

//转为Json对象
Map<String, Object> map=new HashMap<String, Object>();
map.put("total", pageBean.getTotal());
map.put("rows", list);
ResponseUtil.writeJson(resp , map);

改为:

ResponseUtil.writeJson(resp, new R().data("total", pageBean.getTotal()).data("rows", list));

4、增加查询条件

①、api中找到相应属性:toolbar

②、在userManage.jsp页面上增加:

<div id="tb">
    <input class="easyui-textbox" id="bname" name="bname" style="width:20%;padding-left: 10px" data-options="label:'书名:',required:true">
    <a id="btn-search" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-search'">搜索</a>
</div>

③、在book.js里增加:

$("#btn-search").click(function(){
$('#dg').datagrid('load', {
bname: $("#bname").val()
});
});

最后呈现book.js

$(function() {
	/**
	 * 在easyUI中点击下一页上一页等默认的分页效果携带参数是page\rows
	 * bootstrap,点击下一页上一页等默认的分页效果携带参数是page\offset
	 */
	$('#dg').datagrid({    
	    url:$("#ctx").val()+'/book.action?methodName=datagrid',    
	    pagination:true,
	    fitColumns:true,
	    toolbar: '#tb',
	    columns:[[    
	        {field:'bid',title:'id',width:100},    
	        {field:'bname',title:'名称',width:100},    
	        {field:'price',title:'价格',width:100,align:'right'}    
	    ]]    
	}); 
	$("#btn-search").click(function(){
	   $('#dg').datagrid('load', {    
		   bname: $("#bname").val()  
	   });  
	});
})

④、修改BookAction界面代码

List<Book> list = bd.list(new Book(),pageBean);

修改为

List<Book> list = bd.list(book,pageBean);

⑤、最终界面

总结

本篇文章就到这里了希望能够给你带来帮助也希望您能够多多关注的更多内容!


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