ssm框架下实现登录和用户增删改查

环境说明

1. mysql 5.7版本
2. mysql中创建sx的数据库，在sx数据库中有一张tb_user的表
3. tb_user的表中有id，username，password 三个字段
4. Tomcat 9.0版本

项目结构

pom.xml

这边是要用到的依赖和版本号

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <!-- spring版本号 -->
    <spring.version>5.0.2.RELEASE</spring.version>
    <!-- mybatis版本号 -->
    <mybatis.version>3.2.6</mybatis.version>
    <!-- log4j日志文件管理包版本 -->
    <slf4j.version>1.7.7</slf4j.version>
    <log4j.version>1.2.17</log4j.version>
    <c3p0.version>0.9.5.2</c3p0.version>
    <taglibs.version>1.1.2</taglibs.version>
  </properties>

  <dependencies>
    <!-- spring核心包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- mybatis核心包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <!-- mybatis/spring包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.2</version>
    </dependency>
    <!-- 导入java ee jar 包 -->
    <dependency>
      <groupId>javax</groupId>
      <artifactId>javaee-api</artifactId>
      <version>7.0</version>
    </dependency>

    <!-- 导入Mysql数据库链接jar包 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.30</version>
    </dependency>
    <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.2.2</version>
    </dependency>
    <!-- JSTL标签类 -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- 日志文件管理包 -->
    <!-- log start -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>


    <!-- 数据连接池 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>${c3p0.version}</version>
    </dependency>

    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>${taglibs.version}</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency>

    <!-- 导入servlet-api/jsp -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/javax.servlet.jsp-api -->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>javax.servlet.jsp-api</artifactId>
      <version>2.3.1</version>
      <scope>provided</scope>
    </dependency>

  </dependencies>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

  <!-- 配置加载类路径的配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:applicationContext.xml</param-value>
  </context-param>

  <!-- 配置监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
  </listener>

  <!-- 解决中文乱码过滤器 -->
  <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>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- 前端控制器（加载classpath:spring-mvc.xml 服务器启动创建servlet） -->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- 配置初始化参数，创建完DispatcherServlet对象，加载springmvc.xml配置文件 -->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
    <!-- 服务器启动的时候，让DispatcherServlet对象创建 -->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

</web-app>

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:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-4.3.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
      http://www.springframework.org/schema/tx
      http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!-- 1.注解扫描位置-->
    <context:component-scan base-package="allone8.controller" />

    <!-- 2.配置映射处理和适配器-->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>

    <!-- 3.视图的解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/pages/" />
        <property name="suffix" value=".jsp" />
    </bean>
</beans>

applicationContext.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:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
		http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
		http://www.springframework.org/schema/context
		http://www.springframework.org/schema/context/spring-context-4.3.xsd
		http://www.springframework.org/schema/aop
		http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
		http://www.springframework.org/schema/tx
		http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    <!-- 1.配置数据库相关参数properties的属性：${url} -->
    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 2.配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="2"/>
    </bean>

    <!-- 3.配置SqlSessionFactory对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 扫描bean包 使用别名 -->
        <property name="typeAliasesPackage" value="allone8.bean"></property>

        <!--配置加载映射文件 UserMapper.xml-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>

    </bean>

    <!-- 自动生成dao,mapper-->
    <!-- 4.配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="allone8.dao"/>
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>



    <!--自动扫描-->
    <context:component-scan base-package="allone8"/>


    <!-- 配置事务-->
    <!-- 5.配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 6.开启事务注解-->
    <tx:annotation-driven></tx:annotation-driven>

</beans>

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/sx?useSSL=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=

User类

package allone8.bean;

public class User {
    public User() {
    }

    public User(int id, String username, String password) {
        this.id = id;
        this.username = username;
        this.password = password;
    }

    public User(String username, String password) {
        this.username = username;
        this.password = password;
    }

    private int id;
    private String username;
    private String password;

    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;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

UserController 类

package allone8.controller;

import allone8.bean.User;
import allone8.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.ArrayList;


@Controller
@RequestMapping("/user")
public class UserController {
    @Autowired
    private IUserService userService;

    @RequestMapping("/login.do")
    public ModelAndView login(User user) {
        boolean flag = userService.login(user.getUsername(), user.getPassword());
        ModelAndView modelAndView = new ModelAndView();
        if (flag) {
            modelAndView.setViewName("main");
        } else {
            modelAndView.setViewName("../failer");
        }
        return modelAndView;
    }

    @RequestMapping("/findUserAll.do")
    public ModelAndView userAll() {
        ArrayList<User> users = userService.userAll();
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("userList", users);
        modelAndView.setViewName("user-list");
        return modelAndView;
    }

    @RequestMapping("/deleteById.do")
    public String deleteUser(int id) {
        userService.deleteById(id);
        return "redirect:findUserAll.do";
    }

    @RequestMapping("/addUser.do")
    public String addUser(User user) {
        userService.addUser(user);
        return "redirect:findUserAll.do";
    }

    @RequestMapping("/toUpDateById.do")
    public ModelAndView updateUser(int id) {
        User user = userService.findUserById(id);

        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("user", user);
        modelAndView.setViewName("user-update");
        return modelAndView;
    }

    @RequestMapping("/updateUser.do")
    public String updateUser(User user) {
        userService.updateUser(user);
        return "redirect:findUserAll.do";
    }

}

UserDao 接口

package allone8.dao;

import allone8.bean.User;

import java.util.ArrayList;

public interface UserDao {
    User findUserByUserName(String username);

    ArrayList<User> findAll();

    int deleteById(int id);

    void addUser(User user);

    User findUserById(int id);

    void updateUser(User user);
}

UserService 类

package allone8.service.impl;

import allone8.bean.User;
import allone8.dao.UserDao;
import allone8.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.ArrayList;

@Service
public class UserService implements IUserService {
    @Autowired
    private UserDao userDao;
    @Override
    public boolean login(String username, String password) {
        User user =userDao.findUserByUserName(username);
        if (user!=null && user.getPassword().equals(password)){
            return true;
        }
            return false;
    }

    @Override
    public ArrayList<User> userAll() {
        ArrayList<User> users =userDao.findAll();
        return users;
    }

    @Override
    public void deleteById(int id) {
        userDao.deleteById(id);
    }

    @Override
    public void addUser(User user) {
        userDao.addUser(user);
    }

    @Override
    public User findUserById(int id) {
        User user= userDao.findUserById(id);
        return user;
    }

    @Override
    public void updateUser(User user) {
        userDao.updateUser(user);
    }
}

IUserService 接口

package allone8.service;

import allone8.bean.User;

import java.util.ArrayList;

public interface IUserService {
    boolean login(String username, String password);

    ArrayList<User> userAll();

    void deleteById(int id);

    void addUser(User user);

    User findUserById(int id);

    void updateUser(User user);
}

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="allone8.dao.UserDao">
    <select id="findUserByUserName" parameterType="String" resultType="user">
        select * from tb_user where username=#{username}
    </select>

    <select id="findAll" resultType="user">
        select * from tb_user
    </select>

    <delete id="deleteById" parameterType="int">
        delete from tb_user where id=#{id}
    </delete>

    <insert id="addUser" parameterType="user" >
        insert into tb_user (username,password) value (#{username},#{password})
    </insert>

    <select id="findUserById" parameterType="int" resultType="user">
        select * from tb_user where id=#{id}
    </select>

    <update id="updateUser" parameterType="user">
        update tb_user set username=#{username},password=#{password} where id=#{id}
    </update>

</mapper>

login.jsp 关键代码

<form action="/user/login.do" method="post">
    <div class="form-group has-feedback">
        <input type="text" name="username" class="form-control"
               placeholder="用户名"> <span
            class="glyphicon glyphicon-envelope form-control-feedback"></span>
    </div>
    <div class="form-group has-feedback">
        <input type="password" name="password" class="form-control"
               placeholder="密码"> <span
            class="glyphicon glyphicon-lock form-control-feedback"></span>
    </div>
    <div class="row">
        <div class="col-xs-8">
            <div class="checkbox icheck">
                <label><input type="checkbox"> 记住 下次自动登录</label>
            </div>
        </div>
        <!-- /.col -->
        <div class="col-xs-4">
            <button type="submit" class="btn btn-primary btn-block btn-flat">登录</button>
        </div>
        <!-- /.col -->
    </div>
</form>

aside.jsp关键代码

这里是导航页跳转到用户管理的代码

	<li id="system-setting">
		<a href="${pageContext.request.contextPath}/user/findUserAll.do"> <i class="fa fa-circle-o"></i> 用户管理</a>
	</li>

user-list.jsp关键代码

<!-- 数据表格 -->
<div class="table-box">

    <!--工具栏-->
    <div class="pull-left">
        <div class="form-group form-inline">
            <div class="btn-group">
                <button type="button" class="btn btn-default" title="新建"
                        onclick="location.href='${pageContext.request.contextPath}/pages/user-add.jsp'">
                    <i class="fa fa-file-o"></i> 新建
                </button>

                <button type="button" class="btn btn-default" title="刷新">
                    <i class="fa fa-refresh"></i> 刷新
                </button>
            </div>
        </div>
    </div>
    <form action="#"
          method="post">
        <div class="col-md-4 data1">
            <input type="text" class="form-control" name="username"
                   placeholder="username" value="">
        </div>
        <button type="submit" class="btn bg-maroon">搜索</button>
    </form>
    <!--工具栏/-->

    <!--数据列表-->
    <table id="dataList"
           class="table table-bordered table-striped table-hover dataTable">
        <thead>
        <tr>
            <th class="" style="padding-right: 0px"><input
                    id="selall" type="checkbox" class="icheckbox_square-blue">
            </th>
            <th class="sorting_asc">ID</th>
            <th class="sorting_desc">用户名</th>
            <th class="sorting_asc sorting_asc_disabled">密码</th>
            <th class="text-center">操作</th>
        </tr>
        </thead>
        <tbody>
        <c:forEach items="${userList}" var="user">
            <tr>

                <td><input name="ids" type="checkbox"></td>
                <td>${user.id}</td>
                <td>${user.username}</td>
                <td>${user.password}</td>
                <td class="text-center">
                    <a href="${pageContext.request.contextPath}/user/toUpDateById.do?id=${user.id}" class="btn bg-olive btn-xs">更新</a>
                    <a href="${pageContext.request.contextPath}/user/deleteById.do?id=${user.id}" class="btn bg-olive btn-xs">删除</a>
                    <a href="#" class="btn bg-olive btn-xs">添加角色</a>
                </td>
            </tr>
        </c:forEach>
        </tbody>
        <!--
    <tfoot>
    <tr>
    <th>Rendering engine</th>
    <th>Browser</th>
    <th>Platform(s)</th>
    <th>Engine version</th>
    <th>CSS grade</th>
    </tr>
    </tfoot>-->
    </table>
    <!--数据列表/-->

</div>
<!-- 数据表格 /-->

user-add.jsp关键代码

		<!-- 内容区域 -->
		<div class="content-wrapper">

			<!-- 内容头部 -->
			<section class="content-header">
			<h1>
				用户管理 <small>用户表单</small>
			</h1>
			<ol class="breadcrumb">
				<li><a href="#"><i
						class="fa fa-dashboard"></i> 首页</a></li>
				<li><a
					href="${pageContext.request.contextPath}/user/findUserAll.do">用户管理</a></li>
				<li class="active">用户表单</li>
			</ol>
			</section>
			<!-- 内容头部 /-->

			<form action="${pageContext.request.contextPath}/user/addUser.do"
				method="post">
				<!-- 正文区域 -->
				<section class="content"> <!--产品信息-->

				<div class="panel panel-default">
					<div class="panel-heading">用户信息</div>
					<div class="row data-type">
<%--						<div class="col-md-2 title">id</div>--%>
<%--						<div class="col-md-4 data">--%>
<%--							<input type="text" class="form-control" name="id"--%>
<%--								   placeholder="id" value="">--%>
<%--						</div>--%>

						<div class="col-md-2 title">用户名称</div>
						<div class="col-md-4 data">
							<input type="text" class="form-control" name="username"
								placeholder="用户名称" value="">
						</div>
						<div class="col-md-2 title">密码</div>
						<div class="col-md-4 data">
							<input type="password" class="form-control" name="password"
								placeholder="密码" value="">
						</div>


					</div>
				</div>
				<!--订单信息/--> <!--工具栏-->
				<div class="box-tools text-center">
					<button type="submit" class="btn bg-maroon">保存</button>
					<button type="button" class="btn bg-default"
						onclick="history.back(-1);">返回</button>
				</div>
				<!--工具栏/--> </section>
				<!-- 正文区域 /-->
			</form>
		</div>
		<!-- 内容区域 /-->

user-update.jsp关键代码

<!-- 内容区域 -->
<div class="content-wrapper">

	<!-- 内容头部 -->
	<section class="content-header">
	<h1>
		用户管理 <small>用户表单</small>
	</h1>
	<ol class="breadcrumb">
		<li><a href="#"><i
				class="fa fa-dashboard"></i> 首页</a></li>
		<li><a
			href="#">用户管理</a></li>
		<li class="active">用户表单</li>
	</ol>
	</section>
	<!-- 内容头部 /-->

	<form action="${pageContext.request.contextPath}/user/updateUser.do"
		method="post">
		<!-- 正文区域 -->
		<section class="content"> <!--产品信息-->

		<div class="panel panel-default">
			<div class="panel-heading">用户信息</div>
			<div class="row data-type">
				<div class="col-md-2 title">id</div>
				<div class="col-md-4 data">
					<input type="text" class="form-control" name="id"
						   placeholder="id" value="${user.id}">
				</div>

				<div class="col-md-2 title">用户名称</div>
				<div class="col-md-4 data">
					<input type="text" class="form-control" name="username"
						placeholder="用户名称" value="${user.username}">
				</div>
				<div class="col-md-2 title">密码</div>
				<div class="col-md-4 data">
					<input type="password" class="form-control" name="password"
						placeholder="密码" value="${user.password}">
				</div>


			</div>
		</div>
		<!--订单信息/--> <!--工具栏-->
		<div class="box-tools text-center">
			<button type="submit" class="btn bg-maroon">保存</button>
			<button type="button" class="btn bg-default"
				onclick="history.back(-1);">返回</button>
		</div>
		<!--工具栏/--> </section>
		<!-- 正文区域 /-->
	</form>
</div>
<!-- 内容区域 /-->