前言
今天为大家分享的知识点是使用datagrid数据表格进行增删改的操作,至于查询的话,我之前的博客就有分享:
正常效果演示
增加效果演示
增加一条数据:
模糊查询一下,可以看到增加进去的数据:
修改效果演示
修改前:
把爱的种子改成种子,把时间修改一下!
修改后:
删除效果演示
把种子这条数据进行删除:
删除后:
点击确定后得到删除的结果:
因为样式中data-options中可对窗体中选项设置是否必填 以及是什么格式
data-options:required或者validateType 设置验证类型
所以在增加或者修改数据的时候 会进行相关的提示!
工具类和jar依赖
jar依赖:
代码展示
首先是后台增删改的dao方法:
//增加
public int add(Book book) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException {
String sql="insert into t_easyui_book values(null,?,?,?,?,?,?,?,?,?,?,?)";
//pinyin的属性值不是从jsp传递过来的 给书名设置全拼
book.setPinyin(PinYinUtil.getAllPingYin(book.getName()));
return super.executeUpdate(sql,book,new String[] {"name","pinyin","cid","author","price","image","publishing","description","state","deployTime","sales"});
}
//修改
public int edit(Book book) throws NoSuchFieldException, SecurityException, IllegalArgumentException,
IllegalAccessException, SQLException {
book.setPinyin(PinYinUtil.getAllPingYin(book.getName()));
String sql = "update t_easyui_book set name=?,pinyin=?,cid=?,author=?,price=?,image=?,publishing=?,description=?,state=?,deployTime=?,sales=? where id=?";
return super.executeUpdate(sql, book, new String[] { "name", "pinyin", "cid", "author", "price", "image", "publishing", "description", "state", "deployTime", "sales", "id" });
}
//删除
public int del(Book book) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException {
String sql="delete from t_easyui_book where id=?";
return super.executeUpdate(sql,book,new String[] {"id"});
}
注意sql语句不要写错了!
在使用action类处理业务逻辑之前,需要使用到Result工具类进行配置结果码 msg信息 data数据 用来提示操作成功!
package com.wangqiuping.util;
public class Result<T> {
private int code;
private String msg;
private T data;
public static Result SUCCESS=new Result<>(200,"操作成功!");
public static <T> Result ok(T data) {
return new Result(data);
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
private Result(int code, String msg, T data) {
super();
this.code = code;
this.msg = msg;
this.data = data;
}
private Result() {
super();
}
@Override
public String toString() {
return "Result [code=" + code + ", msg=" + msg + ", data=" + data + "]";
}
private Result(int code, String msg) {
super();
this.code = code;
this.msg = msg;
}
private Result(T data) {
super();
this.data = data;
}
}
其次是用来处理业务逻辑的action类:
package com.wangqiuping.action;
import java.sql.SQLException;
import java.util.Arrays;
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.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.wangqiuping.dao.BookDao;
import com.wangqiuping.entity.Book;
import com.wangqiuping.framework.ActionSupport;
import com.wangqiuping.framework.ModelDriven;
import com.wangqiuping.util.DataGridResult;
import com.wangqiuping.util.PageBean;
import com.wangqiuping.util.ResponseUtil;
import com.wangqiuping.util.Result;
public class BookAction extends ActionSupport implements ModelDriven<Book>{
private Book book=new Book();
private BookDao bookDao=new BookDao();
@Override
public Book getModel() {
return book;
}
public String datagrid(HttpServletRequest req,HttpServletResponse resp) throws Exception {
// 考虑两个问题:totals和rows数据从哪来
// totalspageBean中的totals属性 rows 每一页展示的行数
PageBean pageBean=new PageBean();
try {
List<Book> list = this.bookDao.list(book, pageBean);
ResponseUtil.writeJson(resp, DataGridResult.ok(pageBean.getTotal()+"",list));
}catch (InstantiationException e) {
e.printStackTrace();
}catch (IllegalAccessException e) {
e.printStackTrace();
}catch (SQLException e) {
}
return null;
}
// 删除
public String del(HttpServletRequest req,HttpServletResponse resp) throws Exception {
try {
int del = this.bookDao.del(book);
ResponseUtil.writeJson(resp,Result.SUCCESS);
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
//修改、增加合二为一
public String save(HttpServletRequest req,HttpServletResponse resp) throws Exception {
try {
if(book.getId()!=0) {
this.bookDao.edit(book);
}
else {
this.bookDao.add(book);
}
ResponseUtil.writeJson(resp, Result.SUCCESS);
} catch (NoSuchFieldException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
//用来测试的方法
public static void main(String[] args) throws JsonProcessingException {
Map<String,Object> map=new HashMap<String,Object>();
map.put("total",28);
List<Book> asList = Arrays.asList(new Book(1,"x1","x1"),new Book(2,"x2","x2"),new Book(3,"x3","x3"));
map.put("rows",asList);
// 将map集合转换成json
ObjectMapper om=new ObjectMapper();
String jsonstr = om.writeValueAsString(map);
System.out.println(jsonstr);
}
}
相比较于使用servlet获取jsp页面的数据,这里使用到的easyui是不需要进行页面跳转的 只需要使用模态框弹出一个窗体 进行局部刷新 然后调用处理业务逻辑中的增加和修改合二为一的方法 进行判断是否增加或者修改 如果模态框中没有值 进行增加 反之 进行数据回显 进行修改
//修改、增加合二为一
public String save(HttpServletRequest req,HttpServletResponse resp) throws Exception {
try {
if(book.getId()!=0) {
this.bookDao.edit(book);
}
else {
this.bookDao.add(book);
}
ResponseUtil.writeJson(resp, Result.SUCCESS);
} catch (NoSuchFieldException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
js代码:
删除的话 使用的js的方法 需要获取选中行的ID
根据获取到的ID进行删除
$(function() {
var ctx=$("#ctx").val();
$('#dg').datagrid({
url:ctx+'/book.action?methodName=datagrid',
toolbar:'#tb',
pagination:true,//用来分页的属性 通过js实现
singleSelect:true,
columns:[[
{field:'id',title:'id',width:100},
{field:'name',title:'书籍名称',width:100},
{field:'pinyin',title:'拼音',width:100},
{field:'cid',title:'书籍类别',width:100},
{field:'author',title:'作者',width:100},
{field:'price',title:'价格',width:100},
{field:'image',title:'图片',width:200},
{field:'publishing',title:'出版',width:100},
{field:'description',title:'描述',width:100},
{field:'state',title:'状态',width:100},
{field:'sales',title:'销量',width:100},
{field:'deployTime',title:'时间',width:100},
{field:'操作',title:'操作',width:100,formatter: function(value,row,index){
return '<a href="javascript:void(0)" οnclick="edit()">修改</a> <a href="javascript:void(0)" οnclick="del()">删除</a>'
}
}
]]
});
//点击搜索按钮完成按书名进行模糊查询
$("#btn-search").click(function() {
// alert(111);
$('#dg').datagrid('load', {
name: $("#namebox").val()
});
});
//给新增按钮绑定点击事件
$("#btn-add").click(function(){
//需要打开dialog窗体
$("#dd").dialog('open');
});
$("#btn-save").click(function(){
$('#ff').form('submit', {
url:ctx+'/book.action?methodName=save',
success:function(data){
data = eval('(' + data + ')');
if(data.code==200){
alert(data.msg);
//刷新
$('#ff').form('clear');
//关闭模态框
$('#dd').dialog('close');
//刷新datagrid的数据
$('#dg').datagrid('reload');
}
}
});
});
})
//修改方法
function edit() {
// alert('测试一下');
// 数据回显,将选中的datatgrid值进行回显到form表单
var row = $("#dg").datagrid('getSelected');
if (row) {
$("#ff").form('load',row);
//让用户看到from表单
$("#dd").dialog('open');
}
}
//删除
function del(){
// 从获取到行对象开始
var row =$('#dg').datagrid('getSelected');
// 不为空的话就进行下一步处理
if(row){
// 加载ajax进行局部刷新
$.ajax({
// 加载资源
url:$("#ctx").val()+'/book.action?methodName=del&&id='+row.id,
// 得到成功函数返回的值
success:function(data){
// 将括号内的表达式('data')转化为对象
data = eval('(' + data + ')');
if(data.code == 200){
alert(data.msg);
// 刷新数据
$('#dg').datagrid('reload');
}
}
});
}
}
修改的js中记得在数据回显后重新刷新数据!
jsp页面代码:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<!-- 写全局样式 -->
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/jquery-easyui-1.5.1/themes/default/easyui.css">
<!-- 定义图标的样式-->
<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath }/static/js/jquery-easyui-1.5.1/themes/icon.css">
<!--组件库源文件的js文件-->
<script type="text/javascript" src="${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/addBook.js"></script>
<title>book增删改查</title>
</head>
<body>
<input type="hidden" id="ctx" value="${pageContext.request.contextPath}"/>
<div id="tb">
<input class="easyui-textBox" id="namebox" name="namebox" style="width: 20%;padding-left:1-px " data-options="label:'书名',required:true">
<a id="btn-search" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-edit'">搜索</a>
<a id="btn-add" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-help'">新增</a>
</div>
<table id="dg"></table>
<div id="dd" class="easyui-dialog" title="书籍信息编辑窗体" style="width:400px;height:400px;"
data-options="iconCls:'icon-save',resizable:true,modal:true,closed:true,buttons:'#fbtns'">
<form id="ff" method="post">
<input type="hidden" name="id" />
<div>
<label for="name">书名:</label>
<input class="easyui-validatebox" type="text" id="name" name="name" data-options="required:true" />
</div>
<div>
<label for="cid">类型id:</label>
<input class="easyui-validatebox" type="text" name="cid" data-options="required:true" />
</div>
<div>
<label for="author">作者:</label>
<input class="easyui-validatebox" type="text" name="author" data-options="required:true" />
</div>
<div>
<label for="price">价格:</label>
<input class="easyui-validatebox" type="text" name="price" data-options="required:true" />
</div>
<div>
<label for="image">图片:</label>
<input class="easyui-validatebox" type="text" name="image" data-options="required:true" />
</div>
<div>
<label for="publishing">出版社:</label>
<input class="easyui-validatebox" type="text" name="publishing" data-options="required:true" />
</div>
<div>
<label for="description">描述:</label>
<input class="easyui-validatebox" type="text" name="description" data-options="required:true" />
</div>
<div>
<label for="state">状态:</label>
<input class="easyui-validatebox" type="text" name="state" data-options="required:true" />
</div>
<div>
<label for="deployTime">时间:</label>
<input class="easyui-validatebox" type="text" name="deployTime" data-options="required:true" />
</div>
<div>
<label for="sales">销量:</label>
<input class="easyui-validatebox" type="text" name="sales" data-options="required:true" />
</div>
</form>
</div>
<div id="fbtns">
<a id="btn-save" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-search',plain:true">保存</a>
<a id="btn-cancel" href="#" class="easyui-linkbutton" data-options="iconCls:'icon-edit',plain:true">取消</a>
</div>
</body>
</html>
注意要点
1、写这些代码的时候,可能会有比较严重的缓存问题,尤其是在修改了js代码之后,Ctrl+shift+delete快捷键清空浏览器缓存!
2、找到工具栏上面的project------>Clean清空eclipse缓存!
总结
使用easyui中datagrid组件以及from组件的方式,实现增删改的操作,其中也借助了后台中的工具类得以将前端数据显示、并且easyui中已经有data-options属性、可以用来校验,不用再写正则表达式校验,并且easyui中不需要页面跳转,只需要使用模态框弹出窗体 局部刷新就好 从而更加方便快捷!