采用SSM框架实现登录拦截，分页，批量删除的功能
本案列采用的技术有后端spring/springmvc/mybatis/jquery等技术，前端采用bootstrap+jsp
项目结构如下图
依赖pom.xml文件
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.9</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.18.RELEASE</version>
<!-- <optional>true</optional>-->
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>2.0.4</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.2.9</version>
</dependency>
<!-- 分页-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.3.0</version>
</dependency>
<!-- json依赖-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.7.9</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.6.7</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.6.7</version>
</dependency>
applicationContext.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 加载properties文件PPC-->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties"/>
</bean>
<!-- 配置数据源 DDS-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</bean>
<!-- 配置mybatis与spring的整合 SSFB-->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 关联数据源-->
<property name="dataSource" ref="dataSource"/>
<!-- 配置别名-->
<property name="typeAliasesPackage" value="com.mvc.entity"/>
<!-- 扫描sqp映射文件-->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<!-- 配置分页拦截器-->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<value>
helperDialect=mysql
reasonable=true
</value>
</property>
</bean>
</array>
</property>
</bean>
<!-- mapper动态处理，扫描dao接口MSC-->
<bean id="scannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"/>
<!-- 扫描dao接口-->
<property name="basePackage" value="com.mvc.mapper"/>
</bean>
<!-- 事务管理 DSTM-->
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
</beans>
spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 开启spring的扫描-->
<context:component-scan base-package="com.mvc"/>
<!-- 开启springmvc的注解-->
<mvc:annotation-driven/>
<!-- 配置拦截器-->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**/"/>
<bean class="com.mvc.utils.LoginInterCerptor"/>
</mvc:interceptor>
</mvc:interceptors>
<!-- 配置视图路径-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<!-- 配置页面前缀-->
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
jdbc.properties文件
```cpp
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1:3306/spring?characterEncoding=utf8
username=root
password=12345678
web.xml 配置文件
```c
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<!-- 配置监听器-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 配置spring核心文件，自动加载-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 处理乱码-->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*
springmvc
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:spring-mvc.xml
1
true
springmvc
/
数据库脚本
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`userid` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`userpwd` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
PRIMARY KEY (`userid`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 13 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES (4, '小李', '123');
INSERT INTO `user` VALUES (7, '小陈', '123');
INSERT INTO `user` VALUES (8, '小王', '123');
INSERT INTO `user` VALUES (9, '小波波', '123');
INSERT INTO `user` VALUES (10, '小红', '123');
INSERT INTO `user` VALUES (11, '小黄', '123');
INSERT INTO `user` VALUES (12, '小黑', '123');
用户实体类 user
dao接口类
接口对应的SQL映射文件 UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mvc.mapper.UserMapper">
<!-- 查询所有-->
<select id="selectAll" resultType="user">
select * from user
</select>
<!-- 批量删除-->
<delete id="delAll">
delete from user where userid in
<foreach collection="ides" item="id" open="(" separator="," close=")">
#{id}
</foreach>
</delete>
<!-- 登录-->
<select id="login" resultType="user">
select * from user where username=#{username} and userpwd=#{userpwd}
</select>
</mapper>
service接口类
service接口实现类 UserServiceImpl
登录拦截器类LoginInterCerptor
mport com.mvc.entity.User;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
/**
* 登录拦截器
*/
public class LoginInterCerptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
//获取请求路径中的uri
String uri = request.getRequestURI();
HttpSession session = request.getSession();
//获取登录的对象
User user = (User) session.getAttribute("loginuser");
if (uri.indexOf("/login")==0){//放开登录请求
//放行
return true;
}
if (user!=null){
return true;
}
//不符合条件的
request.setAttribute("error","请先登录！！！！");
request.getRequestDispatcher("/login").forward(request,response);
return false;
}
@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
}
}
Json数据格式返回统一格式类
```c
package com.mvc.utils;
import com.fasterxml.jackson.databind.ObjectMapper;
public class Result {
// 定义jackson对象
private static final ObjectMapper MAPPER = new ObjectMapper();
// 响应业务状态
private Integer status;
// 响应消息
private String msg;
// 响应中的数据
private Object data;
public Result() {
}
public Result(Integer status, String msg, Object data) {
this.status = status;
this.msg = msg;
this.data = data;
}
public Result(Object data) {
this.status = 0;
this.msg = "OK";
this.data = data;
}
public static Result ok() {
return new Result(null);
}
public static Result ok(Object data) {
return new Result(data);
}
public static Result build(Integer status, String msg) {
return new Result(status, msg, null);
}
public static Result build(Integer status, String msg, Object data) {
return new Result(status, msg, data);
}
public static ObjectMapper getMAPPER() {
return MAPPER;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
}
Controller控制层类 UserController
package com.mvc.controller;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.mvc.entity.User;
import com.mvc.service.UserService;
import com.mvc.utils.Result;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.List;
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/login")
public String login(String username, String userpwd, HttpServletRequest request){
User user = userService.login(username, userpwd);
if (user!=null){
//把user保存到session
HttpSession session = request.getSession();
session.setAttribute("loginuser",user);
//重定向执行列表请求
return "redirect:/all";
}else {
//登录失败返回登录界面
return "login";
}
}
@RequestMapping("/all")
public String selectAll(@RequestParam(value = "pageNum",defaultValue = "1") Integer pageNum,
Model model){
//开始分页
PageHelper.startPage(pageNum,3);
//获取数据
List<User> users = userService.selectAll();
//包装数据，连续显示3页
PageInfo<User> pageInfo = new PageInfo<>(users, 3);
//保存数据
model.addAttribute("pageInfo",pageInfo);
return "list";
}
//批量删除
@RequestMapping("/delAll")
@ResponseBody
public Result delAll(String ides){
//把string类型的数组转换成int类型的
String[] str_id = ides.split(",");
int[] int_id = new int[str_id.length];
for (int i = 0;i<str_id.length;i++) {
int_id[i]=Integer.parseInt(str_id[i]);
}
//调用业务方法
userService.delAll(int_id);
return Result.build(200,"ok");
}
}
前端页面结构如下，分别有index.jsp/login.jsp/list.jsp页面
jsp index.jsp文件
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
</head>
<body>
<h2>景区登录</h2>
<div>
<form action="/login" method="post" id="login">
<table>
<tr>
<td>用户名</td>
<td>
<input name="username" id="username">
</td>
</tr>
<tr>
<td>密码</td>
<td>
<input name="userpwd" id="userpwd">
</td>
</tr>
<tr>
<td colspan="2">
<input type="button" id="btn" value="登录">
<input type="reset" value="重置">
</td>
</tr>
</table>
</form>
</div>
</body>
<script>
$(function () {
//给登录按钮绑定单击事件
$("#btn").on("click",function () {
var errormsg = "";
var flag = true;
//获取用户名
var username = $("#username").val();
var userpwd = $("#userpwd").val();
if (username==""||userpwd==""){
errormsg="用户名或密码不能为空";
alert(errormsg);
flag=false;
return
}else {
//提交登录
$("#login").submit();
}
})
})
</script>
</html>
数据展示页面list.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%--
Created by IntelliJ IDEA.
User: Administrator
Date: 2023/6/9 0009
Time: 19:47
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/css/bootstrap.min.css">
<script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdn.staticfile.org/popper.js/1.15.0/umd/popper.min.js"></script>
<script src="https://cdn.staticfile.org/twitter-bootstrap/4.3.1/js/bootstrap.min.js"></script>
</head>
<body>
<div>
<div class="container">
<button class="btn btn-danger" id="deluser">删除</button>
<table class="table" border="1" width="567px">
<tr align="center">
<td>编号</td>
<td>
全选<input type="checkbox" id="all">
</td>
<td>姓名</td>
<td>密码</td>
<td>操作</td>
</tr>
<c:forEach items="${pageInfo.list}" var="user">
<tr align="center">
<td>${user.userid}</td>
<td>
<input type="checkbox" class="userid" value="${user.userid}">
</td>
<td>${user.username}</td>
<td>${user.userpwd}</td>
<td>
<button><a href="del?userid=${user.userid}">删除</a></button>
</td>
</tr>
</c:forEach>
</table>
</div>
<div class="container">
<ul class="pagination pagination-lg">
<li class="page-item"><a class="page-link" href="all?pageNum=1">首页</a></li>
<li class="page-item"><a class="page-link" href="all?pageNum=${pageInfo.pageNum-1}">上一页</a></li>
<c:forEach items="${pageInfo.navigatepageNums}" var="page">
<li class="page-item"><a class="page-link" href="all?pageNum=${page}">${page}</a></li>
</c:forEach>
<li class="page-item"><a class="page-link" href="all?pageNum=${pageInfo.pageNum+1}">下一页</a></li>
<li class="page-item"><a class="page-link" href="all?pageNum=${pageInfo.pages}">末页</a></li>
</ul>
</div>
</div>
</body>
<script>
$(function () {
//给全选按钮绑定单击事件
$("#all").click(function () {//全选
$(".userid").prop("checked",this.checked)
});
$(".userid").click(function () {
if ($(".userid").length==$(".userid:checked").length){
$("#all").prop("checked",true)
}else {
$("#all").prop("checked",false)
}
})
//删除
$("#deluser").click(function () {
var ides = "";
var userides = $(".userid:checked")
for(var i =0;i<userides.length;i++){
ides+=userides[i].value+","
}
$.ajax({
url:"/delAll?ides="+ides,
type:"post",
dataType:"json",
success:function (result) {
var msg = result.msg;
if (msg=="ok"){
window.location.href="/all"
}
}
})
})
})
</script>
</html>
login.jsp页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
</head>
<body>
<h2>景区登录</h2>
<div>
<form action="/login" method="post" id="login">
<table>
<tr>
<td>用户名</td>
<td>
<input name="username" id="username">
</td>
</tr>
<tr>
<td>密码</td>
<td>
<input name="userpwd" id="userpwd">
</td>
</tr>
<tr>
<td colspan="2">
<input type="button" id="btn" value="登录">
<input type="reset" value="重置">
</td>
</tr>
</table>
</form>
</div>
</body>
<script>
$(function () {
//给登录按钮绑定单击事件
$("#btn").on("click",function () {
var errormsg = "";
var flag = true;
//获取用户名
var username = $("#username").val();
var userpwd = $("#userpwd").val();
if (username==""||userpwd==""){
errormsg="用户名或密码不能为空";
alert(errormsg);
flag=false;
return
}else {
//提交登录
$("#login").submit();
}
})
})
</script>
</html>