目标:在上节课的基础上点击左边的树型菜单打开对应的的数据表格,并实现查询与分页功能(效果图如下)
一, datagrid
思路
1、给菜单添加点击事件,点击后跳转对应的界面
2、新建一个jsp文件夹,根据数据库创建一个uesemanage.jsp界面,和页面对应的book.js文件
3、到入MVC框架,写好对应的enetity、dao、web类
4、之后配置xml文件
根据数据库找到tree表的url数据,以人员信息维护为例建立uesemanage.jsp
ueseManage.jsp
%@ 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">
//导入js和css
<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="${ pageContext.request.contextPath }/static/js/book.js"></script>
<title>存放书籍</title>
</head>
<body>
//隐藏域(给book.jsp全路径名)
<input type="hidden" id="ctx" value="${ pageContext.request.contextPath }">
<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>
<table id="dg"></table>
</body>
</html>
book实体类
package com.zking.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
}
}
BookDao
package com.zking.dao;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.zking.entity.Book;
import com.zking.util.BaseDao;
import com.zking.util.PageBean;
import com.zking.util.StringUtils;
public class BookDao extends BaseDao<Book>{
//查询
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);
}
}
BookAction子控制器(参考EasyUI API文档; DataGrid表格要求参数为 total(数据总条数)、rows(数据对象))
public class BookAction extends ActionSupport implements ModelDriver<Book> {
private Book book = new Book();
BookDao bd = new BookDao();
public Book getModel() {
return book;
}
public String datagrid(HttpServletRequest req, HttpServletResponse resp) throws Exception {
PageBean pageBean = new PageBean();
pageBean.setRequest(req);
List<Book> list = bd.list(book, pageBean);
ObjectMapper om = new ObjectMapper();
// Map<String, Object> map = new HashMap<String, Object>();
// map.put("total", pageBean.getTotal());
// map.put("rows", list);
ResponseUtil.writeJson(resp,new R().data("total", pageBean.getTotal()).data("rows", list));
return null;
}
子控制器中使用了链式编程,将以下代码进行封装,以达到简化代码的作用
修改前
Map<String, Object> map = new HashMap<String, Object>();
map.put(“total”, pageBean.getTotal());
map.put(“rows”, list);
工具类R(共同结果集写到一个方法里面)
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;
}
}
修改后
ResponseUtil.writeJson(resp,new R().data(“total”, pageBean.getTotal()).data(“rows”, list));
book.js(field属性要用实体类的属性,否则会报错)
$(function() {
$('#dg').datagrid({
url:$('#ctx').val()+'/book.action?methodName=datagrid',
pagination: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'}
]]
});
配置xml
<?xml version="1.0" encoding="UTF-8"?>
<config>
<action path="/menu" type="com.zking.web.MenuAction">
</action>
<action path="/book" type="com.zking.web.BookAction">
</action>
</config>
结果展示:
二,分页以及查询
分页:参考EasyUI API文档,找到相应属性,加入js文件中即可
查询:ueseManage.jsp加入该代码
<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>
在js文件中与查询组件进行绑定(通过 id=“tb”)(在js文件中通过btn-search属性进行关键字查询)(book.js)
$(function() {
/**
* 在easyUI中,点击下一页上一页等默认的分页效果,携带参数是page\rows
* bootstrap,点击下一页上一页等默认的分页效果,携带参数是page\offset
*/
// alert($('#ctx').val());
console.log($('#ctx').val()+'/book.action?methodName=datagrid');
$('#dg').datagrid({
url:$('#ctx').val()+'/book.action?methodName=datagrid',
pagination:true,
/*fitColumns:填充列 使用后width达到100%*/
fitColumns:true,
/*绑定查询按钮*/
toolbar: '#tb',
/*表头*/
columns:[[
{field:'bid',title:'id',width:100},
{field:'bname',title:'名称',width:100},
{field:'price',title:'价格',width:100,align:'right'}
]]
});
/*模糊查询按钮点击事件*/
$("#btn-search").click(function(){
$('#dg').datagrid('load', {
/*模糊查询key*/
bname: $("#bname").val()
});
});
})
最终结果:
到这里就结束了,有不对或补充的地方欢迎大家评论,谢谢!