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layui 中servlet增删改查1、pox中的配置文件2、首先定义两个实体类3、封装两个工具类 jsp前端页面

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我是靠谱客的博主 眼睛大电脑，最近开发中收集的这篇文章主要介绍layui 中servlet增删改查1、pox中的配置文件2、首先定义两个实体类3、封装两个工具类 jsp前端页面，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

1、pox中的配置文件

 <dependencies>
<!--
josn配置文件-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.51</version>
</dependency>
<!--数据库配置文件-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.25</version>
</dependency>
<!--
servlet配置文件包-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!--&lt;!&ndash; 数据库连接池模板 &ndash;&gt;
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
&lt;!&ndash; JDBCTemplate模板 &ndash;&gt;
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.15.RELEASE</version>
</dependency>-->
</dependencies>

2、首先定义两个实体类

        t_user

package servlet;
public class t_user {
private int id;
private String username;
private String password;
private String email;
private String phone;
private String avatar;
private String role;
private String department;
private String position;
public t_user() {
}
public t_user(int id, String username, String password, String email, String phone, String avatar, String role, String department, String position) {
this.id = id;
this.username = username;
this.password = password;
this.email = email;
this.phone = phone;
this.avatar = avatar;
this.role = role;
this.department = department;
this.position = position;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getAvatar() {
return avatar;
}
public void setAvatar(String avatar) {
this.avatar = avatar;
}
public String getRole() {
return role;
}
public void setRole(String role) {
this.role = role;
}
public String getDepartment() {
return department;
}
public void setDepartment(String department) {
this.department = department;
}
public String getPosition() {
return position;
}
public void setPosition(String position) {
this.position = position;
}
@Override
public String toString() {
return "t_user{" +
"id=" + id +
", username='" + username + ''' +
", password='" + password + ''' +
", email='" + email + ''' +
", phone='" + phone + ''' +
", avatar='" + avatar + ''' +
", role='" + role + ''' +
", department='" + department + ''' +
", position='" + position + ''' +
'}';
}
}

t_role

package servlet;
public class t_role {
private int id; //行id
private String name;//名称
private String description;//位置
private String permission;
public t_role() {
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getPermission() {
return permission;
}
public void setPermission(String permission) {
this.permission = permission;
}
public t_role(int id, String name, String description, String permission) {
this.id = id;
this.name = name;
this.description = description;
this.permission = permission;
}
@Override
public String toString() {
return "t_role{" +
"id=" + id +
", name='" + name + ''' +
", description='" + description + ''' +
", permission='" + permission + ''' +
'}';
}
}

3、封装两个工具类

 DrServlet

package utils;
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 java.io.IOException;
import java.lang.reflect.Method;
public class DrServlet extends HttpServlet {
protected String MyUrl="/error.html";
@Override
protected void service(HttpServletRequest Request, HttpServletResponse Response) throws ServletException, IOException {
String uri= Request.getRequestURI();
String name=uri.substring(uri.lastIndexOf("/")+1);
try {
//获取当前类的Class对象
Class classType = this.getClass();
//实例化类
Object invokeTester = classType.newInstance();
//获取类中所有对象
Method[] methods = classType.getDeclaredMethods();
boolean b=true;
for (Method method : methods) {
if(name.equalsIgnoreCase(method.getName())){
b=false;
//获取类里面的方法对象，参数：1、方法名，2、参数列表（形参）
Method addmethod = classType.getMethod(name, new Class[]{HttpServletRequest.class,HttpServletResponse.class});
//方法实现，通过实例化的类实现方法
Object obj = addmethod.invoke(invokeTester, new Object[]{Request, Response});
if(obj!=null){
//返回路径
String s = obj.toString().toLowerCase();
String substring = s.substring(s.lastIndexOf(":") + 1);
if(s.indexOf("redirect")!=-1){
Response.sendRedirect(Request.getContextPath()+substring);
}else if(s.indexOf("forward")!=-1){
Request.getRequestDispatcher(substring).forward(Request,Response);
}
}
}
}
if(b){
Response.sendRedirect(Request.getContextPath()+MyUrl);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

Jdbcutils 工具类

package utils;
import java.sql.*;
public class JDBCUtils {
private static String driver = "com.mysql.cj.jdbc.Driver";
private static String url = "jdbc:mysql://localhost:3306/meirong?serverTimezone=UTC";
private static String username = "root";
private static String password = "123456";
static{
try{
Class.forName(driver);
}catch (Exception e) {
throw new ExceptionInInitializerError(e);
}
}
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(url, username,password);
}
public static void release(Connection conn, Statement st, ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
rs = null;
}
if (st != null) {
try {
st.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

user增删改查

package utils;
import java.sql.*;
public class JDBCUtils {
private static String driver = "com.mysql.cj.jdbc.Driver";
private static String url = "jdbc:mysql://localhost:3306/meirong?serverTimezone=UTC";
private static String username = "root";
private static String password = "123456";
static{
try{
Class.forName(driver);
}catch (Exception e) {
throw new ExceptionInInitializerError(e);
}
}
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(url, username,password);
}
public static void release(Connection conn, Statement st, ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
rs = null;
}
if (st != null) {
try {
st.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

 

package utils;
import java.sql.*;
public class JDBCUtils {
private static String driver = "com.mysql.cj.jdbc.Driver";
private static String url = "jdbc:mysql://localhost:3306/meirong?serverTimezone=UTC";
private static String username = "root";
private static String password = "123456";
static{
try{
Class.forName(driver);
}catch (Exception e) {
throw new ExceptionInInitializerError(e);
}
}
public static Connection getConnection() throws SQLException {
return DriverManager.getConnection(url, username,password);
}
public static void release(Connection conn, Statement st, ResultSet rs) {
if (rs != null) {
try {
rs.close();
} catch (Exception e) {
e.printStackTrace();
}
rs = null;
}
if (st != null) {
try {
st.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (conn != null) {
try {
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}

 jsp前端页面

user表

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Layui</title>
<meta name="renderer" content="webkit">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<link rel="stylesheet" href="//unpkg.com/layui@2.6.8/dist/css/layui.css">
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<!-- 注意：如果你直接复制所有代码到本地，上述css路径需要改成你本地的 -->
</head>
<body>
<div class="site-text" style="margin: 5%; display: none" id="window" target="test123">
<form class="layui-form" id="book" method="post" lay-filter="example">
<!-- <div class="layui-form-item">
<label class="layui-form-label">编号</label>
<div class="layui-input-block">
<input type="text" id="id" name="id" lay-verify="title" autocomplete="off" placeholder="请输入编号"
class="layui-input">
</div>
</div>-->
<div class="layui-form-item">
<label class="layui-form-label">用户名</label>
<div class="layui-input-block">
<input type="text" id="username" name="username1" lay-verify="title" autocomplete="off" placeholder="请输入用户名"
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">密码</label>
<div class="layui-input-block">
<input type="text" id="password" name="password" lay-verify="title" autocomplete="off" placeholder="请输入密码"
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">邮箱</label>
<div class="layui-input-block">
<input type="text" id="email" name="email" lay-verify="title" autocomplete="off" placeholder="请输入邮箱"
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">手机号</label>
<div class="layui-input-block">
<input type="text" id="phone" name="phone" lay-verify="title" autocomplete="off" placeholder="请输入手机号"
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">头像</label>
<div class="layui-input-block">
<input type="text" id="avatar" name="avatar" lay-verify="title" autocomplete="off" placeholder="请输入头像"
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">权限</label>
<div class="layui-input-block">
<input type="text" id="role" name="role" lay-verify="title" autocomplete="off" placeholder="请输入权限"
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">部门</label>
<div class="layui-input-block">
<input type="text" id="department" name="department" lay-verify="title" autocomplete="off" placeholder="请输入部门"
class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">职位</label>
<div class="layui-input-block">
<input type="text" id="position" name="position" lay-verify="title" autocomplete="off" placeholder="请输入职位"
class="layui-input">
</div>
</div>
<!--<div class="layui-form-item">
<div class="layui-input-block">
<button class="layui-btn" lay-submit lay-filter="demo1">确认</button>
</div>
</div>-->
</form>
</div>
<div class="demoTable">
搜索用户名：
<div class="layui-inline">
<input class="layui-input" name="name" id="demoReload" autocomplete="off">
</div>
<button class="layui-btn" data-type="reload" id="bbttnn">搜索</button>
</div>
<table class="layui-table" lay-data="{width: 1200, height:330, url:'/Servlet_war/user/list', page:false, id:'idTest'}"
lay-filter="demo">
<thead>
<tr>
<th lay-data="{type:'checkbox', fixed: 'left'}"></th>
<th lay-data="{field:'id', width:80, sort: true}"> 编号</th>
<th lay-data="{field:'username', width:80}"> 用户名</th>
<th lay-data="{field:'password', width:80, sort: true}"> 密码</th>
<th lay-data="{field:'email', width:80}"> 邮箱</th>
<th lay-data="{field:'phone', width:160}"> 手机号</th>
<th lay-data="{field:'avatar', width:80, sort: true}"> 头像</th>
<th lay-data="{field:'role', width:80}"> 权限</th>
<th lay-data="{field:'department', width:135, sort: true}"> 部门</th>
<th lay-data="{field:'position', width:80, sort: true}"> 职位</th>
<th lay-data="{fixed: 'right', width:178, align:'center', toolbar: '#barDemo'}"></th>
</tr>
</thead>
</table>
<!--<button id="inst" class="layui-btn">添加</button>-->
<script type="text/html" id="barDemo">
<a class="layui-btn layui-btn-xs" lay-event="edit">编辑</a>
<a class="layui-btn layui-btn-danger layui-btn-xs" lay-event="del">删除</a>
<a class="layui-btn layui-btn-danger layui-btn-xs" lay-event="insert" id="inst">添加</a>
</script>
<script src="//unpkg.com/layui@2.6.8/dist/layui.js"></script>
<script src="js/jquery.js" charset="utf-8"></script>
<!-- 注意：如果你直接复制所有代码到本地，上述 JS 路径需要改成你本地的 -->
<script>
layui.use(['table','form'], function () {
var upOrIns;
var table = layui.table;
var form = layui.form;
//监听工具条
table.on('tool(demo)', function (obj) {
var data = obj.data;
if (obj.event === 'del') {
layer.open({
btn: ['确认', '取消'],
content: '真的删除行么',
skin: 'layui-layer-molv',
yes: function (index) {
obj.del();
layer.close(index);
$.post("/Servlet_war/user/del", {"id": data.id});
}, no: function () {
layer.close(index);
}
});
} else if (obj.event === 'edit') {
layer.open({
btn:["确认","取消"]
, type: 1
, title: ['修改信息']
, shadeClose: true
, shade: 0
, maxmin: true
, content: $("#window")
, success: function (layer, index) {
$('#username').val(data.username);
$('#password').val(data.password);
$('#email').val(data.email);
$('#phone').val(data.phone);
$('#avatar').val(data.avatar);
$('#role').val(data.role);
$('#department').val(data.department);
$('#position').val(data.position);
}, end: function () {
$("input[type=text]").val("")
$("#window").hide();
},yes:function (index) {
$.post("/Servlet_war/user/update", {
"id":data.id,
"username":$('#username').val(),
"password":$("#password").val(),
"email":$("#email").val(),
"phone":$("#phone").val(),
"avatar":$("#avatar").val(),
"role":$("#role").val(),
"department":$("#department").val(),
"position":$("#position").val()
},function () {
window.location.reload();
});
layer.close(index);
}
});
}
else if (obj.event === 'insert') {
layer.open({
btn:["确认","取消"]
, type: 1
, title: ['添加信息']
, shadeClose: true
, shade: 0
, maxmin: true
, content: $("#window")
, success: function (layer, index) {
/*$('#username').val(data.username);
$('#password').val(data.password);
$('#email').val(data.email);
$('#phone').val(data.phone);
$('#avatar').val(data.avatar);
$('#role').val(data.role);
$('#department').val(data.department);
$('#position').val(data.position);*/
}, end: function () {
$("input[type=text]").val("")
$("#window").hide();
},yes:function (index) {
$.post("/Servlet_war/user/add", {
"username":$('#username').val(),
"password":$("#password").val(),
"email":$("#email").val(),
"phone":$("#phone").val(),
"avatar":$("#avatar").val(),
"role":$("#role").val(),
"department":$("#department").val(),
"position":$("#position").val()
},function () {
window.location.reload();
});
layer.close(index);
}
});
}
});
/*
$("#inst").click(function(){
layer.open({
btn:["确认","取消"]
, type: 1
, title: ['添加信息']
, shadeClose: true
, shade: 0
, maxmin: true
, content: $("#window")
, success: function (layer, index) {
}, end: function () {
$("#window").hide();
},yes:function (index) {
$.post("/test/user/add",{
"username":$('#username').val(),
"password":$("#password").val(),
"email":$("#email").val(),
"phone":$("#phone").val(),
"avatar":$("#avatar").val(),
"role":$("#role").val(),
"department":$("#department").val(),
"position":$("#position").val()
},function () {
window.location.reload();
});
layer.close(index);
}
});
});*/
$("#bbttnn").click(function () {
table.reload('idTest', {url: '/Servlet_war/user/name?name='+$("#demoReload").val() ,
where: {}},false)
});
/*$("#bbttnn").click(function () {
table.reload('demo', {url: '/Servlet_war/user/name?name='+$("#find").val() ,
where: {}},false)
});*/
});
</script>
</body>
</html>

 role表

<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
<title>JSP - Hello World</title>
<!-- 引入 layui.css -->
<link rel="stylesheet" href="//unpkg.com/layui@2.6.8/dist/css/layui.css">
<!-- 引入 layui.js -->
<script src="//unpkg.com/layui@2.6.8/dist/layui.js"></script>
<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
</head>
<body>
<div class="demoTable">
搜索ID：
<div class="layui-inline">
<input class="layui-input" name="name2" id="demoReload" autocomplete="off">
</div>
<button class="layui-btn" data-type="reload" id="bbttnn">搜索</button>
</div>
<%--这是编辑的页面--%>
<div class="site-text" style="margin: 5%; display: none" id="window"
target="test123">
<form class="layui-form" id="book" method="post" lay-filter="example">
<div class="layui-form-item">
<label class="layui-form-label">id</label>
<div class="layui-input-block">
<input type="text" id="id" name="id" lay-verify="title" autocomplete="off" readonly="value" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">名称</label>
<div class="layui-input-block">
<input type="text" id="id1" name="name" lay-verify="title" autocomplete="off" placeholder="请输入名称" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">描述</label>
<div class="layui-input-block">
<input type="text" id="id2" name="description" lay-verify="title" autocomplete="off" placeholder="请输入描述" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">权限列表</label>
<div class="layui-input-block">
<input type="text" id="id3" name="permission" lay-verify="title" autocomplete="off" placeholder="请输入权限列表" class="layui-input">
</div>
</div>
</form>
</div>
<%--这是添加的页面--%>
<div class="site-text" style="margin: 5%; display: none" id="w1"
target="test123">
<form class="layui-form" id="book_2" method="post" lay-filter="example">
<div class="layui-form-item">
<label class="layui-form-label">名称</label>
<div class="layui-input-block">
<input type="text" id="id11" name="name1" lay-verify="title" autocomplete="off" placeholder="请输名称" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">描述</label>
<div class="layui-input-block">
<input type="text" id="id12" name="description1" lay-verify="title" autocomplete="off" placeholder="请输入描述" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">权限列表</label>
<div class="layui-input-block">
<input type="text" id="id13" name="permission1" lay-verify="title" autocomplete="off" placeholder="请输入权限列表" class="layui-input">
</div>
</div>
</form>
</div>
<table class="layui-table" lay-data="{width: 1000, height:600, url:'/Servlet_war/role/list', page:true, id:'idTest'}" lay-filter="demo">
<thead>
<tr>
<th lay-data="{type:'checkbox', fixed: 'left'}"></th>
<th lay-data="{field:'id', width:80, sort: true, fixed: true}">ID</th>
<th lay-data="{field:'name', width:150}">名称</th>
<th lay-data="{field:'description', width:150, sort: true}">描述</th>
<th lay-data="{field:'permission', width:300}">权限列表</th>
<th lay-data="{fixed: 'right', width:200, align:'center', toolbar: '#barDemo'}"></th>
</tr>
</thead>
</table>
<script type="text/html" id="barDemo">
<a class="layui-btn layui-btn layui-btn-sm" lay-event="edit">编辑</a>
<a class="layui-btn layui-btn-danger layui-btn layui-btn-sm" lay-event="del">删除</a>
<a class="layui-btn layui-btn-normal
layui-btn layui-btn-sm" lay-event="detail">添加</a>
</script>
<script>
layui.use(['table','jquery'], function(){
var table = layui.table;
//监听表格复选框选择
table.on('checkbox(demo)', function(obj){
console.log(obj)
});
//监听工具条
table.on('tool(demo)', function(obj){
var data = obj.data;
if(obj.event === 'edit'){
layer.open({
type: 1 //Page层类型
,skin: 'layui-layer-molv'
,area: ['380px', '400px']
,title: ['编辑信息','font-size:18px']
,btn: ['确定', '取消']
,shadeClose: true
,shade: 0 //遮罩透明度
,maxmin: true //允许全屏最小化
,content:$("#window")
//弹窗路径
,success:function(layero,index){
$('#id').val(data.id);
$('#id1').val(data.name);
$('#id2').val(data.description);
$('#id3').val(data.permission);
},yes:function(index,layero){
$("#window").hide();
$.post("/Servlet_war/role/update",
{"id":data.id,"name":$("#id1").val(),"description":$("#id2").val(),"permission":$("#id3").val()},function (){
window.location.reload();
});
layer.close(index);
},no:function(index,layero){
$("#window").hide();
$("#window").css( "display:none");
layer.close(index);
},end:function (){
$("#window").hide();
}
});
} else if(obj.event === 'del'){
layer.confirm('真的删除行么', function(index){
obj.del();
layer.close(index);
$.post("/Servlet_war/role/del",{"id":data.id});
});
} else if(obj.event === 'detail'){
layer.open({
type: 1 //Page层类型
,skin: 'layui-layer-molv'
,area: ['380px', '400px']
,title: ['添加信息','font-size:18px']
,btn: ['确定', '取消']
,shadeClose: true
,shade: 0 //遮罩透明度
,maxmin: true //允许全屏最小化
,content:$("#w1")
//弹窗路径
,success:function(layero,index){
},yes:function(index,layero){
$("#w1").hide();
$.post("/Servlet_war/role/add",{"name1":$("#id11").val(),"description1":$("#id12").val(),"permission1":$("#id13").val()},function (){
window.location.reload();
});
layer.close(index);
},no:function(index,layero){
$("#w1").hide();
$("#w1").css( "display:none");
layer.close(index);
},end:function (){
$("#w1").hide();
}
});
}
});
$("#bbttnn").click(function () {
table.reload('idTest', {url: '/Servlet_war/role/list?name2='+$("#demoReload").val() ,where: {}},false)
});
});
</script>
</body>
</html>

最后

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