在我先前的基础上面添加批量删除功能。实现的效果如下
删除成功
通常情况下删除不应该真正删除,而是应该有一个标志flag,但flag=true表示状态可见,但flag=false表示状态不可见,为删除状态。便于日后数据库的维护和信息的查询。因此表结构添加一个flag字段
没有改变的代码这里就不写了,发生改变的代码贴出来
1、因为表结构发生变化。所以对应的Student.java和Student.hbm.xml发生改变
[java] view plaincopy
- package com.model;
- public class Student {
- String studentid;// 主键
- String name;// 姓名
- String gender;// 性别
- String age;// 年龄
- String flag;//标志
- public String getStudentid() {
- return studentid;
- }
- public void setStudentid(String studentid) {
- this.studentid = studentid;
- }
- public String getName() {
- return name;
- }
- public void setName(String name) {
- this.name = name;
- }
- public String getGender() {
- return gender;
- }
- public void setGender(String gender) {
- this.gender = gender;
- }
- public String getAge() {
- return age;
- }
- public void setAge(String age) {
- this.age = age;
- }
- public String getFlag() {
- return flag;
- }
- public void setFlag(String flag) {
- this.flag = flag;
- }
- }
Student.hbm.xml的代码
[html] view plaincopy
- <?xml version="1.0"?>
- <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
- "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
- <!-- Generated 2013-6-23 23:31:47 by Hibernate Tools 3.4.0.CR1 -->
- <hibernate-mapping>
- <class name="com.model.Student" table="STUDENT">
- <id name="studentid" type="java.lang.String">
- <column name="STUDENTID" />
- <generator class="assigned" />
- </id>
- <property name="name" type="java.lang.String">
- <column name="NAME" />
- </property>
- <property name="gender" type="java.lang.String">
- <column name="GENDER" />
- </property>
- <property name="age" type="java.lang.String">
- <column name="AGE" />
- </property>
- <property name="flag" type="java.lang.String">
- <column name="FLAG" />
- </property>
- </class>
- </hibernate-mapping>
2、对应的Action。StudentAction
[java] view plaincopy
- package com.action;
- import java.io.PrintWriter;
- import java.util.ArrayList;
- import java.util.List;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import net.sf.json.JSONObject;
- import org.apache.log4j.Logger;
- import org.apache.struts2.ServletActionContext;
- import com.model.Student;
- import com.service.StudentService;
- public class StudentAction {
- static Logger log = Logger.getLogger(StudentAction.class);
- private JSONObject jsonObj;
- private String rows;// 每页显示的记录数
- private String page;// 当前第几页
- private StudentService student_services;//String依赖注入
- private Student student;//学生
- private String parameter;//参数
- private String table;//表名
- private String field;//字段
- private String num;//
- private String ids;//
- //查询出所有学生信息
- public String allInfo() throws Exception {
- log.info("查询出所有学生信息"); //引用到log4j你应该加入 log4j的配置文件,不然用System.out.println();来替换
- List list = student_services.getStudentList(page, rows);//传入参数页码和行数,获取当前页的数据
- this.toBeJson(list,student_services.getStudentTotal());//调用自己写的toBeJson方法转化为JSon格式
- return null;
- }
- //批量删除信息
- public String del() throws Exception{
- log.info("删除学生信息");
- log.info("循环次数:"+num);
- List list=new ArrayList();
- Boolean b=false;
- int temp=Integer.parseInt(num);//循环次数
- int j=0;
- for (int i = 0; i < temp; i++) {
- list.add(ids.substring(j, j+3));//将一个字符串打散成多个字符串
- j=j+4;
- log.info("==========="+list.get(i));
- student_services.deleteStudent((String) list.get(i));//根据ID主键进行删除操作
- }
- return null;
- }
- //新增学生信息
- public String add() throws Exception{
- log.info("新增学生信息");
- student_services.saveStudent(student);
- return null;
- }
- //查询唯一性
- public String verify() throws Exception{
- log.info("ACTION验证唯一性");
- String s = student_services.queryBy_unique(table,field ,parameter);
- log.info("结果:" + s);
- //将验证的结果返回JSP页面,s为1代表没有重复,为0代表有重复
- HttpServletResponse response = ServletActionContext.getResponse();
- response.setContentType("text/html;charset=utf-8");
- PrintWriter out = response.getWriter();
- out.print(s);
- out.flush();
- out.close();
- return null;
- }
- //转化为Json格式
- public void toBeJson(List list,int total) throws Exception{
- HttpServletResponse response = ServletActionContext.getResponse();
- HttpServletRequest request = ServletActionContext.getRequest();
- JSONObject jobj = new JSONObject();//new一个JSON
- jobj.accumulate("total",total );//total代表一共有多少数据
- jobj.accumulate("rows", list);//row是代表显示的页的数据
- response.setCharacterEncoding("utf-8");//指定为utf-8
- response.getWriter().write(jobj.toString());//转化为JSOn格式
- log.info(jobj.toString());
- }
- public StudentService getStudent_services() {
- return student_services;
- }
- public void setStudent_services(StudentService student_services) {
- this.student_services = student_services;
- }
- public void setJsonObj(JSONObject jsonObj) {
- this.jsonObj = jsonObj;
- }
- public void setRows(String rows) {
- this.rows = rows;
- }
- public void setPage(String page) {
- this.page = page;
- }
- public void setStudent(Student student) {
- this.student = student;
- }
- public Student getStudent() {
- return student;
- }
- public void setParameter(String parameter) {
- this.parameter = parameter;
- }
- public void setTable(String table) {
- this.table = table;
- }
- public void setField(String field) {
- this.field = field;
- }
- public void setNum(String num) {
- this.num = num;
- }
- public void setIds(String ids) {
- this.ids = ids;
- }
- }
3、对应的接口StudentService
[java] view plaincopy
- package com.service;
- import java.util.List;
- import com.model.Student;
- public interface StudentService {
- public List getStudentList(String page,String rows) throws Exception;//根据第几页获取,每页几行获取数据
- public int getStudentTotal() throws Exception;//统计一共有多少数据
- public void saveStudent(Student student)throws Exception;//新增学生信息
- public String queryBy_unique(String table,String field ,String parameter) throws Exception;//验证唯一性
- public void deleteStudent(String ids) throws Exception;//删除学生信息
- }
4、对应的接口实现类,从43行开始的del()方法用循环的方式输出多个id,进行批量删除
[java] view plaincopy
- package com.serviceImpl;
- import java.util.List;
- import org.apache.log4j.Logger;
- import org.hibernate.Criteria;
- import org.hibernate.Query;
- import org.hibernate.SessionFactory;
- import org.hibernate.criterion.Restrictions;
- import com.model.Student;
- import com.service.StudentService;
- public class StudentServiceImpl implements StudentService {
- Logger log=Logger.getLogger(this.getClass());
- private SessionFactory sessionFactory;
- // 根据第几页获取,每页几行获取数据
- public List getStudentList(String page, String rows) {
- //当为缺省值的时候进行赋值
- int currentpage = Integer.parseInt((page == null || page == "0") ? "1": page);//第几页
- int pagesize = Integer.parseInt((rows == null || rows == "0") ? "10": rows);//每页多少行
- //查询学生信息,顺便按学号进行排序
- List list = this.sessionFactory.getCurrentSession().createQuery("from Student where flag=‘true‘ order by studentid")
- .setFirstResult((currentpage - 1) * pagesize).setMaxResults(pagesize).list();
- //setFirstResult 是设置开始查找处。setFirstResult的值 (当前页面-1)X每页条数
- //设置每页最多显示的条数 setMaxResults每页的条数了
- return list;
- }
- // 统计一共有多少数据
- public int getStudentTotal() throws Exception {
- return this.sessionFactory.getCurrentSession().find("from Student where flag=‘true‘").size();
- }
- // 新增学生信息
- public void saveStudent(Student student) throws Exception {
- student.setFlag("true");
- this.sessionFactory.getCurrentSession().save(student);
- }
- //判断是否具有唯一性
- public String queryBy_unique(String table,String field ,String parameter) throws Exception {
- System.out.println("===============验证唯一性=========");
- String s="select * from "+table +" t where t."+field+"=‘"+parameter+"‘";
- System.out.println("SQL语句:"+s);
- Query query = this.sessionFactory.getCurrentSession().createSQLQuery(s);
- int n=query.list().size();
- if(n==0)//如果集合的数量为0,说明没有重复,具有唯一性
- {
- return "1";//返回值为1,代表具有唯一性
- }
- return "0";//返回值为0,代表已经有了,重复了
- }
- //进行删除操作
- public void deleteStudent(String ids) throws Exception {
- log.info("删除学生信息");
- Student student=this.queryStudent(ids);
- student.setFlag("false");
- this.sessionFactory.getCurrentSession().update(student);
- }
- //根据学生主键查询学生信息
- public Student queryStudent(String id) throws Exception{
- log.info("根据学生主键查询学生信息");
- Criteria criteria=this.sessionFactory.getCurrentSession().createCriteria(Student.class);
- criteria.add(Restrictions.eq("studentid", id));
- Student student=(Student) criteria.list().get(0);
- return student;
- }
- public SessionFactory getSessionFactory() {
- return sessionFactory;
- }
- public void setSessionFactory(SessionFactory sessionFactory) {
- this.sessionFactory = sessionFactory;
- }
- }
5、对应的JSP页面index.jsp
[java] view plaincopy
- <%@ page language="java" pageEncoding="utf-8" isELIgnored="false"%>
- <%
- String path = request.getContextPath();
- %>
- <%@ taglib prefix="s" uri="/struts-tags"%>
- <!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>Easyui</title>
- <!-- 引入Jquery -->
- <script type="text/javascript" src="<%=path%>/js/easyui/jquery-1.8.0.min.js" charset="utf-8"></script>
- <!-- 引入Jquery_easyui -->
- <script type="text/javascript" src="<%=path%>/js/easyui/jquery.easyui.min.js" charset="utf-8"></script>
- <!-- 引入easyUi国际化--中文 -->
- <script type="text/javascript" src="<%=path%>/js/easyui/locale/easyui-lang-zh_CN.js" charset="utf-8"></script>
- <!-- 引入easyUi默认的CSS格式--蓝色 -->
- <link rel="stylesheet" type="text/css" href="<%=path%>/js/easyui/themes/default/easyui.css" />
- <!-- 引入easyUi小图标 -->
- <link rel="stylesheet" type="text/css" href="<%=path%>/js/easyui/themes/icon.css" />
- <!-- 引入对应的JS,切记一定要放在Jquery.js和Jquery_Easyui.js后面,因为里面需要调用他们,建议放在最后面 -->
- <script type="text/javascript" src="<%=path%>/index.js" charset="utf-8"></script>
- </head>
- <body>
- <h2>
- <b>easyui的DataGrid实例</b>
- </h2>
- <table id="mydatagrid">
- <thead>
- <tr>
- <th data-options="field:‘studentid‘,width:100,align:‘center‘">学生学号</th>
- <th data-options="field:‘name‘,width:100,align:‘center‘">姓名</th>
- <th data-options="field:‘gender‘,width:100,align:‘center‘">性别</th>
- <th data-options="field:‘age‘,width:100,align:‘center‘">年龄</th>
- </tr>
- </thead>
- </table>
- <!-- 显示添加按钮的Div -->
- <div id="easyui_toolbar" style="padding: 2px 0px 2px 15px; height: auto">
- <a href="#" id="easyui_add" class="easyui-linkbutton" iconCls="icon-add" plain="true">添加学生信息</a>
- <a href="#" id="deltable" class="easyui-linkbutton" iconCls="icon-remove" plain="true">批量删除</a>
- </div>
- <!-- 添加学生信息的表单 -->
- <div id="addDlg" class="easyui-dialog" style="width: 580px; height: 350px; padding: 10px 20px" closed="true" buttons="#addDlgBtn">
- <form id="addForm" method="post">
- <table>
- <tr>
- <td>学生主键</td>
- <td>
- <input name="student.studentid" id="studentid" class="easyui-validatebox" required="true" missingMessage="学生主键不能为空">
- </td>
- <td>
- <!-- 存放提示重复信息的div -->
- <div id="xianshi1" style="float: left"></div>
- <div style="float: left"> </div>
- <div id="xianshi2" style="font-size: 14px; color: #FF0000; float: left"></div>
- </td>
- </tr>
- <tr>
- <td>姓名</td>
- <td>
- <input name="student.name" id="name" class="easyui-validatebox" required="true" missingMessage="姓名不能为空">
- </td>
- </tr>
- <tr>
- <td>性别</td>
- <td>
- <!-- 使用Easyui中的combobox -->
- <select class="easyui-combobox" style="width: 155px;" name="student.gender" id="gender" data-options="panelHeight:‘auto‘">
- <option value="男">男</option>
- <option value="女">女</option>
- </select>
- </td>
- </tr>
- <tr>
- <td>年龄</td>
- <td>
- <input name="student.age" id="age" class="easyui-validatebox">
- </td>
- </tr>
- </table>
- </form>
- </div>
- <!-- 保存学生信息的按钮,被Jquery设置,当没被调用的时候不显示 -->
- <div id="addDlgBtn">
- <a href="#" id="addSaveBooktimecode" class="easyui-linkbutton" iconCls="icon-ok" onclick="add_ok()">确认</a>
- <a href="#" class="easyui-linkbutton" iconCls="icon-cancel" onclick="javascript:$(‘#addDlg‘).dialog(‘close‘)">取消</a>
- </div>
- </body>
- </html>
6、对应的JavaScript页面。index.js
[javascript] view plaincopy
- var isClickOk=true;//判断的变量
- $(function() {
- //datagrid设置参数
- $(‘#mydatagrid‘).datagrid({
- title : ‘datagrid实例‘,
- iconCls : ‘icon-ok‘,
- width : 600,
- pageSize : 5,//默认选择的分页是每页5行数据
- pageList : [ 5, 10, 15, 20 ],//可以选择的分页集合
- nowrap : true,//设置为true,当数据长度超出列宽时将会自动截取
- striped : true,//设置为true将交替显示行背景。
- collapsible : true,//显示可折叠按钮
- toolbar:"#easyui_toolbar",//在添加 增添、删除、修改操作的按钮要用到这个
- url:‘studentallInfo.action‘,//url调用Action方法
- loadMsg : ‘数据装载中......‘,
- //singleSelect:true,//为true时只能选择单行 为了实现批量删除必须隐去
- fitColumns:true,//允许表格自动缩放,以适应父容器
- sortName : ‘studentid‘,//当数据表格初始化时以哪一列来排序
- sortOrder : ‘asc‘,//定义排序顺序,可以是‘asc‘或者‘desc‘(正序或者倒序)。
- remoteSort : false,
- frozenColumns : [ [ {
- field : ‘ck‘,
- checkbox : true
- } ] ],
- pagination : true,//分页
- rownumbers : true//行数
- });
- //当点击添加学生信息的时候触发
- $("#easyui_add").click(function() {
- $("#xianshi1").empty();//清除上次出现的图标1
- $("#xianshi2").empty();//清除上次出现的图标2
- $(‘#addDlg‘).dialog(‘open‘).dialog(‘setTitle‘, ‘添加学生信息‘);//打开对话框
- $(‘#addForm‘).form(‘clear‘);
- });
- //当光标移开焦点的时候进行重复验证
- $("#studentid").blur(function(){
- jQuery.ajax({ //使用Ajax异步验证主键是否重复
- type : "post",
- url : "studentverify.action?table=Student&field=studentid¶meter="+$(‘#studentid‘).val(),
- dataType:‘json‘,
- success : function(s){
- if($(‘#studentid‘).val()==""){//当为主键为空的时候什么都不显示,因为Easyui的Validate里面已经自动方法限制
- }
- else if( s == "1" )//当返回值为1,表示在数据库中没有找到重复的主键
- { isClickOk=true;
- $("#xianshi1").empty();
- var txt1="<img src="+"‘imgs/agree_ok.gif‘"+"/>";//引入打勾图标的路径
- $("#xianshi1").append(txt1);//在id为xianshi1里面加载打勾图标
- $("#xianshi2").empty();
- $("#xianshi2").append("未被使用");//在di为xianshi2中加载“未被使用”这四个字
- }
- else
- {
- $("#xianshi1").empty();
- isClickOk=false;
- var txt1="<img src="+"‘imgs/agree_no.gif‘"+"/>"//引入打叉图标的路径
- $("#xianshi1").append(txt1);//在id为xianshi1里面加载打叉图标
- $("#xianshi2").empty();
- $("#xianshi2").append("已被使用");//在id为xianshi2里面加载“已被使用”四个字
- }
- }
- });
- });
- /********** 点击删除按钮开始 ***********/
- $(‘#deltable‘).click(function(){
- var array = $(‘#mydatagrid‘).datagrid(‘getSelections‘);
- var id2="";
- var num=array.length;//获取要删除信息的个数
- for(var i=0; i<array.length; i++){//组成一个字符串,ID主键之间用逗号隔开
- if(i!=array.length-1){
- id2=id2+array[i].studentid+",";
- }else{
- id2=id2+array[i].studentid;
- }
- }
- var selected = $(‘#mydatagrid‘).datagrid(‘getSelected‘);
- if (array != "") {
- $.messager.defaults={ok:"确定",cancel:"取消"};
- $.messager.confirm(‘‘, ‘是否要删除该信息?‘, function(r){
- if (r){
- $.post("studentdel.action",
- { ids:id2,num:num},function(response){
- if(response=="-1"){
- $.messager.alert(‘操作提示‘,"删除失败",‘error‘);
- }else{
- $(‘#mydatagrid‘).datagrid({url:"studentallInfo.action"});
- $.messager.alert(‘操作提示‘,"删除成功",‘info‘);
- }
- });
- }
- });
- }else{
- $.messager.alert(‘‘,"请先选择要删除的信息!");
- }
- });
- /********** 删除按钮结束 ***********/
- });
- //添加信息点击保存的时候触发此函数
- function add_ok(){
- $.messager.defaults={ok:"确定",cancel:"取消"};
- $.messager.confirm(‘Confirm‘, ‘您确定增加?‘, function(r){//使用确定,取消的选择框
- if (r){
- $(‘#addForm‘).form(‘submit‘,{//引入Easyui的Form
- url:"studentadd.action",//URL指向添加的Action
- onSubmit: function(){
- if(isClickOk==false){//当主键重复的时候先前就已经被设置为false,如果为false就不提交,显示提示框信息不能重复
- $.messager.alert(‘操作提示‘, ‘主键不能重复!‘,‘error‘);
- return false;
- }
- else if($(‘#addForm‘).form(‘validate‘)){//判断Easyui的Validate如果都没错误就同意提交
- $.messager.alert(‘操作提示‘, ‘添加信息成功!‘,‘info‘);
- return true;
- }else{//如果Easyui的Validate的验证有一个不完整就不提交
- $.messager.alert(‘操作提示‘, ‘信息填写不完整!‘,‘error‘);
- return false;
- }
- }
- });
- $(‘#mydatagrid‘).datagrid({url:‘studentallInfo.action‘});//实现Datagrid重新刷新效果
- $(‘#addDlg‘).dialog(‘close‘);//关闭对话框
- }
- });
- }
时间: 2024-10-06 01:55:37