SSM框架整合与实战：Spring+Mybatis+SpringMVC-优快云博客

本文链接：https://blog.youkuaiyun.com/liu_to_liu/article/details/118467692

这篇博客详细介绍了如何在SSM环境下分别配置和使用Spring、Mybatis以及SpringMVC，包括环境搭建、每个组件的独立使用、整合过程以及事务管理和批量删除等功能实现。

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SSM整合

1.1 需求和步骤分析

需求

使用ssm框架完成对 account 表的增删改查操作。
步骤分析

1. 准备数据库和表记录

2. 创建web项目

3. 编写mybatis在ssm环境中可以单独使用

4. 编写spring在ssm环境中可以单独使用

5. spring整合mybatis

6. 编写springMVC在ssm环境中可以单独使用

7. spring整合springMVC

1.2 环境搭建

1）准备数据库和表记录

CREATE TABLE `account` (
	`id` int(11) NOT NULL AUTO_INCREMENT,
	`name` varchar(32) DEFAULT NULL,
	`money` double DEFAULT NULL,
	PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

insert into `account`(`id`,`name`,`money`) values (1,'tom',1000),
(2,'jerry',1000);

2）创建web项目

1.3 编写mybatis在ssm环境中可以单独使用

需求：基于mybatis先来实现对account表的查询

1）相关坐标

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.myproject</groupId>
    <artifactId>ssm</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

    <packaging>war</packaging>
    <dependencies>
        <!--mybatis坐标-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.15</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>
</project>

2）Account实体

package com.myproject.domain;

public class Account {
    private Integer id;
    private String name;
    private Double money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }
}

3）AccountDao接口

package com.myproject.dao;

import com.myproject.domain.Account;

import java.util.List;

public interface AccountDao {
    /*
        查询所有账户
     */
    public List<Account> findAll();
}

4）AccountDao.xml映射

<?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.myproject.dao.AccountDao">
    <!--查询所有用户-->
    <select id="findAll" resultType="com.myproject.domain.Account">
        select * from account
    </select>
</mapper>

5）mybatis核心配置文件

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///spring_db
jdbc.username=root
jdbc.password=root

SqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <!--加载properties文件-->
    <properties resource="jdbc.properties" />
    
    <!--类型别名配置-->
    <typeAliases>
        <package name="com.myproject.domain"/>
    </typeAliases>

    <environments default="dev">
        <environment id="dev">
            <transactionManager type="JDBC"> </transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
    
    <!--加载映射配置文件-->
    <mappers>
        <package name="com.myproject.dao"/>
    </mappers>
</configuration>

6）测试代码

package com.myproject.test;


import com.myproject.dao.AccountDao;
import com.myproject.domain.Account;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MybatisTest {
    @Test
    public void testMybatis() throws IOException {
        InputStream resourceAsStream = Resources.getResourceAsStream("SqlMapConfig.xml");

        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
        SqlSession sqlSession = sqlSessionFactory.openSession();

        AccountDao accountDao = sqlSession.getMapper(AccountDao.class);

        List<Account> all = accountDao.findAll();
        for (Account account : all) {
            System.out.println(account);
        }

        sqlSession.close();
    }
}

1.4 编写spring在ssm环境中可以单独使用

1）相关坐标

<!--spring坐标-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.1.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.8.13</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.1.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>5.1.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>5.1.5.RELEASE</version>
</dependency>

2）AccountService接口

package com.myproject.service;

import com.myproject.domain.Account;

import java.util.List;

public interface AccountService {
    public List<Account> findAll();
}

3）AccountServiceImpl实现

package com.myproject.service.impl;

import com.myproject.dao.AccountDao;
import com.myproject.domain.Account;
import com.myproject.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class AccountServiceImpl implements AccountService {
    // 需要用到AccountDao的代理对象
    @Autowired
    private AccountDao accountDao;

    /*
        测试spring在ssm环境中的单独使用
     */
    @Override
    public List<Account> findAll() {
        List<Account> all = accountDao.findAll();
        return all;
    }
}

4）spring核心配置文件

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

       <!--配置IOC相关操作：开启注解扫描-->
       <context:component-scan base-package="com.myproject.service"></context:component-scan>
</beans>

5）测试代码

package com.myproject.test;

import com.myproject.domain.Account;
import com.myproject.service.AccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class SpringTest {
    @Autowired
    private AccountService accountService;

    @Test
    public void testSpring() {
        List<Account> all = accountService.findAll();
        for (Account account : all) {
            System.out.println(account);
        }
    }
}

1.5 spring整合mybatis

1）整合思想

将mybatis接口代理对象的创建权交给spring管理，我们就可以把dao的代理对象注入到service中，此时也就完成了spring与mybatis的整合了。

2）导入整合包

<!--mybatis整合spring坐标-->
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.1</version>
</dependency>

3）spring配置文件管理mybatis

**注意：**此时可以将mybatis主配置文件删除。

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

       <!--配置IOC相关操作：开启注解扫描-->
       <context:component-scan base-package="com.myproject.service"></context:component-scan>

       <!--spring整合mybatis 开始-->
       <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

       <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
              <property name="driverClassName" value="${jdbc.driver}" />
              <property name="url" value="${jdbc.url}" />
              <property name="username" value="${jdbc.username}" />
              <property name="password" value="${jdbc.password}" />
       </bean>

       <!--sqlSessionFactory的创建权交给了spring 生产sqlSession-->
       <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
              <property name="dataSource" ref="dataSource" />
              <property name="typeAliasesPackage" value="com.myproject.domain"/>
              <!--引入加载mybatis的核心配置文件 如果核心配置文件没有作用的法，可以不用加载-->
              <property name="configLocation" value="classpath:SqlMapConfig.xml" />
        </bean>

       <!--mapper映射扫描 MapperScannerConfigurer扫面包下所有接口，生成代理对象存到IOC容器中-->
       <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
              <property name="basePackage" value="com.myproject.dao" />
       </bean>
       <!--spring整合mybatis 结束-->
</beans>

4）修改AccountServiceImpl

package com.myproject.service.impl;

import com.myproject.dao.AccountDao;
import com.myproject.domain.Account;
import com.myproject.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class AccountServiceImpl implements AccountService {
    // 需要用到AccountDao的代理对象
    @Autowired
    private AccountDao accountDao;

    /*
        测试spring在ssm环境中的单独使用
     */
    @Override
    public List<Account> findAll() {
        return accountDao.findAll();
    }
}

1.6 编写springMVC在ssm环境中可以单独使用

需求：访问到controller里面的方法查询所有账户，并跳转到list.jsp页面进行列表展示

1）相关坐标

<!--springMVC坐标-->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.1.5.RELEASE</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2</version>
    <scope>provided</scope>
</dependency>
<dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

2）导入页面资源

在这里插入图片描述

3）前端控制器DispathcerServlet

<?xml version="1.0" encoding="UTF-8"?>
<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_4_0.xsd"
         version="4.0">
    <!--前端控制器-->
    <servlet>
        <servlet-name>DisptcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DisptcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--中文乱码过滤器：解决post方式提交的乱码-->
    <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>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

4）AccountController和 list.jsp

package com.myproject.controller;

import com.myproject.domain.Account;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.ArrayList;

@Controller
@RequestMapping("/account")
public class AccountController {
    /*
        查询所有用户
     */
    @RequestMapping("/findAll")
    public String findAll(Model model) {
        // 实现查询所有账户
        ArrayList<Account> list = new ArrayList<Account>();

        Account account1 = new Account();
        account1.setId(1);
        account1.setName("jim");
        account1.setMoney(1000d);

        Account account2 = new Account();
        account2.setId(2);
        account2.setName("jom");
        account2.setMoney(2000d);

        list.add(account1);
        list.add(account2);

        // 把封装好的list存到model中
        model.addAttribute("list",list);

        return "list";
    }
}

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>账户列表</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="${pageContext.request.contextPath}/css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="${pageContext.request.contextPath}/js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>
    <style type="text/css">
        td, th {
            text-align: center;
        }
    </style>
</head>
<body>
<div class="container">
  <div class="row">
      <h3 style="text-align: center">账户信息列表</h3>
      <div class="col-lg-2"></div>
      <div class="col-lg-8">

          <form action="${pageContext.request.contextPath}/account/deleteBatch" method="post" id="deleteBatchForm">
          <table border="1" class="table table-bordered table-hover">
              <tr class="success">
                  <th>
                      <input type="checkbox" id="checkAll">
                      <%--实现全选全不选效果--%>
                      <script>
                          $('#checkAll').click(function () {
                                $('input[name="ids"]').prop('checked',$(this).prop('checked'));
                          })
                      </script>

                  </th>
                  <th>编号</th>
                  <th>姓名</th>
                  <th>余额</th>
                  <th>操作</th>
              </tr>

              <c:forEach items="${list}" var="account">

              <tr>
                  <td>
                      <input type="checkbox" name="ids" value="${account.id}">
                  </td>
                  <td>${account.id}</td>
                  <td>${account.name}</td>
                  <td>${account.money}</td>
                  <td><a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/account/findById?id=${account.id}">修改</a>&nbsp;<a class="btn btn-default btn-sm" href="">删除</a></td>
              </tr>
              </c:forEach>


              <tr>
                  <td colspan="9" align="center">
                      <a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加账户</a>
                      <input class="btn btn-primary" type="button" value="删除选中" id="deleteBatchBtn">
                  </td>
              </tr>
          </table>
          </form>
      </div>
      <div class="col-lg-2"></div>
  </div>
</div>
</body>

<script>
    /*给删除选中按钮绑定点击事件*/
    $('#deleteBatchBtn').click(function () {
            if(confirm('您确定要删除吗')){
                if($('input[name=ids]:checked').length > 0){
                    /*提交表单*/
                    $('#deleteBatchForm').submit();
                }

            }else {
                alert('想啥呢，没事瞎操作啥')
            }
    })

</script>

</html>

5）springMVC核心配置文件

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">

    <!--组件扫描： 只扫描controller-->
    <context:component-scan base-package="com.myproject.controller" />

    <!--mvc注解增强：处理器映射器及处理器适配器-->
    <mvc:annotation-driven />

    <!--视图解析器-->
    <bean id="resourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!--放行静态资源-->
    <mvc:default-servlet-handler />
</beans>

1.7 spring整合springMVC

1）整合思想

spring和springMVC其实根本就不用整合，本来就是一家。
但是我们需要做到spring和web容器整合，让web容器启动的时候自动加载spring配置文件，web容器销毁的时候spring的ioc容器也销毁。

2）spring和web容器整合

ContextLoaderListener加载【掌握】

可以使用spring-web包中的ContextLoaderListener监听器，可以监听servletContext容器的创建和销毁，来同时创建或销毁IOC容器。

<!--配置spring的监听器-->
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>

3）修改AccountController

package com.myproject.controller;

import com.myproject.domain.Account;
import com.myproject.service.AccountService;
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 java.util.List;

@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;
    /*
        查询所有用户
     */
    @RequestMapping("/findAll")
    public String findAll(Model model) {
        // 实现查询所有账户
        List<Account> list = accountService.findAll();

        // 把封装好的list存到model中
        model.addAttribute("list",list);

        return "list";
    }
}

1.8 spring配置声明式事务

1）spring配置文件加入声明式事务

<!--spring的声明事务-->
<!--1. 事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
       <property name="dataSource" ref="dataSource" />
</bean>

<!--2. 开启事务注解的支持-->
<tx:annotation-driven />

@Service
@Transactional
public class AccountServiceImpl implements AccountService {
}

2）add.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>添加用户</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="${pageContext.request.contextPath}/css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="${pageContext.request.contextPath}/js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
    <center><h3>添加账户</h3></center>
    <div class="row">
        <div class="col-lg-3"></div>
        <div class="col-lg-6">
            <form action="${pageContext.request.contextPath}/account/save" method="post">
                <div class="form-group">
                    <label for="name">姓名：</label>
                    <input type="text" class="form-control" id="name" name="name" placeholder="请输入姓名">
                </div>
                      <div class="form-group">
                    <label for="money">余额：</label>
                    <input type="text" class="form-control" id="money" name="money" placeholder="请输入余额">
                </div>

                <div class="form-group" style="text-align: center">
                    <input class="btn btn-primary" type="submit" value="提交" />
                    <input class="btn btn-default" type="reset" value="重置" />
                    <input class="btn btn-default" type="button" onclick="history.go(-1)" value="返回" />
                </div>
            </form>
        </div>
        <div class="col-lg-3"></div>
    </div>
</div>
</body>
</html>

3）AccountController

@RequestMapping("/save")
public String save(Account account) {
    accountService.save(account);
    // 跳转到findAll方法重新查询一次数据库进行数据的遍历展示
    return "redirect:/account/findAll";
}

4）AccountService接口和实现类

package com.myproject.service;

import com.myproject.domain.Account;

import java.util.List;

public interface AccountService {
    public List<Account> findAll();
    void save(Account account);
}

package com.myproject.service.impl;

import com.myproject.dao.AccountDao;
import com.myproject.domain.Account;
import com.myproject.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Transactional
public class AccountServiceImpl implements AccountService {
    // 需要用到AccountDao的代理对象
    @Autowired
    private AccountDao accountDao;

    /*
        测试spring在ssm环境中的单独使用
     */
    @Override
    public List<Account> findAll() {
        List<Account> all = accountDao.findAll();
        return all;
    }

    /*
        账户添加
     */
    @Override
    public void save(Account account) {
        accountDao.save(account);
    }
}

5）AccountDao

package com.myproject.dao;

import com.myproject.domain.Account;

import java.util.List;

public interface AccountDao {
    /*
        查询所有账户
     */
    public List<Account> findAll();

    void save(Account account);
}

6）AccountDao.xml映射

<?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.myproject.dao.AccountDao">
    <!--查询所有用户-->
    <select id="findAll" resultType="com.myproject.domain.Account">
        select * from account
    </select>

    <!--添加账户-->
    <insert id="save" parameterType="account">
        insert into account values(null,#{name}, #{money})
    </insert>
</mapper>

1.9 修改操作

1.9.1 数据回显

① AccountController

@RequestMapping("/findById")
public String findById(Integer id, Model model) {
	Account account = accountService.findById(id);
	model.addAttribute("account", account);
	return "update";
}

② AccountService接口和实现类

Account findById(Integer id);

@Override
public Account findById(Integer id) {
	return accountDao.findById(id);
}

③ AccountDao接口和映射文件

Account findById(Integer id);

<select id="findById" parameterType="int" resultType="Account">
	select * from account where id = #{id}
</select>

④ update.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>添加用户</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="${pageContext.request.contextPath}/css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="${pageContext.request.contextPath}/js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
    <center><h3>更新账户</h3></center>
    <div class="row">
        <div class="col-lg-3"></div>
        <div class="col-lg-6">
            <form action="${pageContext.request.contextPath}/account/update" method="post">
                <input type="hidden" name="id" value="${account.id}">
                <div class="form-group">
                    <label for="name">姓名：</label>
                    <input type="text" class="form-control" id="name" name="name" value="${account.name}" placeholder="请输入姓名">
                </div>
                <div class="form-group">
                    <label for="money">余额：</label>
                    <input type="text" class="form-control" id="money" name="money"  value="${account.money}" placeholder="请输入余额">
                </div>

                <div class="form-group" style="text-align: center">
                    <input class="btn btn-primary" type="submit" value="提交" />
                    <input class="btn btn-default" type="reset" value="重置" />
                    <input class="btn btn-default" type="button" onclick="history.go(-1)" value="返回" />
                </div>
            </form>
        </div>
        <div class="col-lg-3"></div>
    </div>
</div>
</body>
</html>

1.9.2 账户更新

① AccountController

@RequestMapping("/update")
public String update(Account account){
	accountService.update(account);
	return "redirect:/account/findAll";
}

② AccountService接口和实现类

void update(Account account);

@Override
public void update(Account account) {
	accountDao.update(account);
}

③ AccountDao接口和映射文件

void update(Account account);

<update id="update" parameterType="Account">
	update account set name = #{name},money = #{money} where id = #{id}
</update>

1.10 批量删除

1）list.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>账户列表</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="${pageContext.request.contextPath}/css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="${pageContext.request.contextPath}/js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>
    <style type="text/css">
        td, th {
            text-align: center;
        }
    </style>
</head>
<body>
<div class="container">
  <div class="row">
      <h3 style="text-align: center">账户信息列表</h3>
      <div class="col-lg-2"></div>
      <div class="col-lg-8">

          <form action="${pageContext.request.contextPath}/account/deleteBatch" method="post" id="deleteBatchForm">
          <table border="1" class="table table-bordered table-hover">
              <tr class="success">
                  <th>
                      <input type="checkbox" id="checkAll">
                      <%--实现全选全不选效果--%>
                      <script>
                          $('#checkAll').click(function () {
                                $('input[name="ids"]').prop('checked',$(this).prop('checked'));
                          })
                      </script>

                  </th>
                  <th>编号</th>
                  <th>姓名</th>
                  <th>余额</th>
                  <th>操作</th>
              </tr>

              <c:forEach items="${list}" var="account">

              <tr>
                  <td>
                      <input type="checkbox" name="ids" value="${account.id}">
                  </td>
                  <td>${account.id}</td>
                  <td>${account.name}</td>
                  <td>${account.money}</td>
                  <td><a class="btn btn-default btn-sm" href="${pageContext.request.contextPath}/account/findById?id=${account.id}">修改</a>&nbsp;<a class="btn btn-default btn-sm" href="">删除</a></td>
              </tr>
              </c:forEach>


              <tr>
                  <td colspan="9" align="center">
                      <a class="btn btn-primary" href="${pageContext.request.contextPath}/add.jsp">添加账户</a>
                      <input class="btn btn-primary" type="button" value="删除选中" id="deleteBatchBtn">
                  </td>
              </tr>
          </table>
          </form>
      </div>
      <div class="col-lg-2"></div>
  </div>
</div>
</body>

<script>
    /*给删除选中按钮绑定点击事件*/
    $('#deleteBatchBtn').click(function () {
            if(confirm('您确定要删除吗')){
                if($('input[name=ids]:checked').length > 0){
                    /*提交表单*/
                    $('#deleteBatchForm').submit();
                }

            }else {
                alert('想啥呢，没事瞎操作啥')
            }


    })

</script>

</html>

2）AccountController

@RequestMapping("/deleteBatch")
public String deleteBatch(Integer[] ids) {
	accountService.deleteBatch(ids);
	return "redirect:/account/findAll";
}

3）AccountService接口和实现类

void deleteBatch(Integer[] ids);

@Override
public void deleteBatch(Integer[] ids) {
	accountDao.deleteBatch(ids);
}

4）AccountDao接口和映射文件

void deleteBatch(Integer[] ids);

<delete id="deleteBatch" parameterType="int">
	delete from account
	<where>
		<foreach collection="array" open="id in(" close=")" separator="," item="id">
			#{id}
		</foreach>
	</where>
</delete>