ssm框架整合实现基础的增删改查

其他 2021-03-03 14:40:18 阅读次数: 0

ssm框架整合

文章目录

前言

第一次入手ssm框架，想把这些框架整合需要的步骤全部记录下来，既是为了以后回顾，也是为了重新巩固一遍知识，虽然还不是很懂各种各样的配置，但是还是要去慢慢理解，因而此举很有必要，下面我们进入ssm框架的整合吧。

一、SSM框架中各层级间的作用及关系？

  • 表现层（springMVC）：Controller层（Handler层）
    负责具体的业务模块流程的控制

    Controller层通过要调用Service层的接口来控制业务流程，控制的
    配置也在Spring配置文件里面。

  • 业务层（Spring）：Service层
    Service层：负责业务模块的逻辑应用设计。
    首先设计其接口，然后再实现他的实现类。
    通过对Spring配置文件中配置其实现的关联，完成此步工作，我们
    就可以通过调用Service的接口来进行业务处理。
    最后通过调用DAO层已定义的接口，去实现Service具体的 实现类。

  • 持久层（Mybatis）：Dao层（Mapper层）
    Dao层：负责与数据库进行交互设计，用来处理数据的持久化工作。
    DAO层的设计首先是设计DAO的接口，
    然后在Spring的配置文件中定义此接口的实现类，就可在其他模块中
    调用此接口来进行数据业务的处理，而不用关心接口的具体实现类是
    哪个类，这里用到的就是反射机制， DAO层的数据源配置，以及有
    关数据库连接的参数都在Spring的配置文件中进行配置。

  • 视图层：View层
    负责前台jsp页面的展示。
    此层需要与Controller层结合起来开发。

  • 各层次之间的联系
    本来Controller层与View层是可以放在.jsp文件里一起开发的，但是为了降低代码的复杂度，提高其可维护性，将其分为了这两层，这也体现了MVC框架的特性，即结构清晰，耦合度低。
    Service层是建立在DAO层之上的，建立了DAO层后才可以建立Service层，而Service层又是在Controller层之下的，因而Service层应该既调用DAO层的接口，又要提供接口给Controller层的类来进行调用，它刚好处于一个中间层的位置。每个模型都有一个Service接口，每个接口分别封装各自的业务处理方法。

二、使用步骤

1.设计数据库，建表

create table account
(
    id int auto_increment primary key,
    username varchar(255) not null,
    money    int(255)     not null
);

2.导入相关依赖

<?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>org.example</groupId>
    <artifactId>ssmP</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <spring.version>4.3.14.RELEASE</spring.version>
    </properties>
    <dependencies>
        <!-- JSTL，2个 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

        <!-- 数据库部分 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.12</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.6</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!-- 连接池 -->
        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
        <!-- spring系列 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</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>

        <!-- 日志记录 -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

        <!-- tomcat环境，2个 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope><!-- 容器提供的包，不需要打包 -->
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

    <!--资源过滤问题-->
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
    </build>

</project>

导入依赖之后，需要检查WEB-INF/lib目录下面是否有jar包，如果没有需要手动导入，不然访问资源会报404错误！！！！

3.相关配置文件

db.properties

jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/sqlfiftypractice?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8
jdbc.username=root
jdbc.password=123456

log4j.properties

log4j.rootLogger = INFO , stdout 
log4j.logger.mypackage=DEBUG
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = %d{
    
    yyyy-MM-dd HH:mm:ss} [%t] %-5p %c{
    
    1}:%L - %m%n

web.xml配置文件

<?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">
    <!--DispatcherServlet-->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
            <param-value>classpath:application-context.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--encodingFilter-->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>


    <!--Session过期时间-->
    <session-config>
        <session-timeout>15</session-timeout>
    </session-config>

</web-app>

4.框架核心配置文件

spring-dao.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"
       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">

    <context:annotation-config/>

    <!--1.配置数据库相关参数 -->
    <context:property-placeholder location="classpath:db.properties"/>

    <!--2.数据库连接池-->
    <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--配置连接池属性-->
        <property name="driverClass" value="${jdbc.driverClass}"/>
        <!-- 基本属性 url、user、password -->
        <property name="jdbcUrl" value="${jdbc.url}" />
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}" />
    </bean>

    <!--约定大于配置-->
    <!--3.配置SqlSessionFactory对象-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--往下才是mybatis和spring真正整合的配置-->
        <!--注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
        <!--配置mybatis全局配置文件:mybatisConfig.xml-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--扫描entity包,使用别名,多个用;隔开-->
        <property name="typeAliasesPackage" value="com.lhh.pojo"/>
        <!--扫描sql配置文件:mapper需要的xml文件-->
        <!--<property name="mapperLocations" value="classpath:config/mybatis/*Mapper.xml"/>-->
    </bean>

    <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg index="0" ref="sqlSessionFactory" />
    </bean>

    <!-- 4:配置扫描Dao接口包,动态实现DAO接口,注入到spring容器-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入SqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描的Dao接口-->
        <property name="basePackage" value="com.lhh.dao"/>
    </bean>

</beans>

spring-service.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:tx="http://www.springframework.org/schema/tx"
       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">

    <!--扫描service包下所有使用注解的类型-->
    <context:component-scan base-package="com.lhh.service"/>

    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--配置基于注解的声明式事务默认使用注解来管理事务行为-->
    <tx:annotation-driven transaction-manager="transactionManager"/>
   
</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: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.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">

    <!--配置spring mvc-->
    <!--1,开启springmvc注解模式
    a.自动注册DefaultAnnotationHandlerMapping,AnnotationMethodHandlerAdapter
    b.默认提供一系列的功能:数据绑定，数字和日期的format@NumberFormat,@DateTimeFormat
    c:xml,json的默认读写支持-->
    <mvc:annotation-driven/>

    <!--2.静态资源默认servlet配置-->
    <!--
        1).加入对静态资源处理：js,gif,png
        2).允许使用 "/" 做整体映射
    -->
    <mvc:default-servlet-handler/>

    <!--3：配置JSP 显示ViewResolver-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--4:扫描web相关的bean-->
    <context:component-scan base-package="com.lhh.controller"/>
</beans>

mybatis-config.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>
    <!--<settings>
        &lt;!&ndash;<setting name="logImpl" value="STDOUT_LOGGING"/>&ndash;&gt;
        &lt;!&ndash;<setting name="logImpl" value="LOG4J"/>&ndash;&gt;
    </settings>-->

    <typeAliases>
        <!--给全限定类名起一个别名，在映射文件中使用这个别名，节省了开发的时间-->
        <typeAlias type="com.lhh.pojo.Account" alias="account"></typeAlias>
    </typeAliases>

    <mappers>
        <!--在同一个包下，并且名称相同可以使用.-->
        <mapper class="com.lhh.dao.AccountMapper"></mapper>
    </mappers>


</configuration>

spring核心配置文件:application-context.xml(把前面的三个层的配置文件导入到该配置文件当中)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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">

    <import resource="spring-dao.xml"></import>
    <import resource="spring-service.xml"></import>
    <import resource="spring-mvc.xml"></import>

</beans>

5.编写mapper（dao层）

package com.lhh.dao;

import com.lhh.pojo.Account;
import org.apache.ibatis.annotations.Param;
import org.omg.CORBA.PUBLIC_MEMBER;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface AccountMapper {
    
    
    public int addAccount(Account account);

    public int deleteAccount(@Param("id") int id);

    public int updateAccoount(Account account);

    public List<Account> queryAccount();

    public Account queryAccountById(@Param("id") int id);

    public List<Account> queryAccountByName(String name);
}

6.定义跟mapper同包同名的配置文件

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--namespace制定对应的mapper-->
<mapper namespace="com.lhh.dao.AccountMapper">
    <!--插入用户-->
    <insert id="addAccount" parameterType="account">
        insert into account(username,money)
        values(#{username},#{money})
    </insert>

    <!--删除用户-->
    <delete id="deleteAccount" parameterType="int">
        delete from account
        <where>
            <if test="id != null">
                id=#{id}
            </if>
        </where>
    </delete>

    <!--查询用户-->
    <select id="queryAccount" resultType="account">
        select * from account
    </select>

    <!--根据id进行查询-->
    <select id="queryAccountById" resultType="account" parameterType="int">
        select * from account
        <where>
            <if test="id != null">
                id=#{id}
            </if>
        </where>
    </select>

    <!--更新-->
    <update id="updateAccoount" parameterType="account">
        update account
        <set>
            <if test="username != null">
                username=#{username},
            </if>

            <if test="money != null">
                money=#{money}
            </if>
        </set>
        where id=#{id}
    </update>

    <!--根据用户名称进行查询-->
    <select id="queryAccountByName" parameterType="String" resultType="account">
        select * from account where username like #{name}
    </select>

</mapper>

7.编写pojo层（entity，model)

有一个lombok插件，可以自动生成set，get，以及构造方法，但是不建议使用。

package com.lhh.pojo;

public class Account {
    
    
    private int id;
    private String username;
    private int money;

    public Account(int id, String username, int money) {
    
    
        this.id = id;
        this.username = username;
        this.money = money;
    }

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

    public Account() {
    
    
    }

    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 int getMoney() {
    
    
        return money;
    }

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

8.编写service层

package com.lhh.service;

import com.lhh.pojo.Account;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface UserService {
    
    
    public int addAccount(Account account);

    public int deleteAccount(int id);

    public int updateAccoount(Account account);

    public List<Account> queryAccount();

    public Account queryAccountById(int id);

    public List<Account> queryAccountByName(String name);
}

service接口的实现类:

package com.lhh.service.impl;

import com.lhh.dao.AccountMapper;
import com.lhh.pojo.Account;
import com.lhh.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserServiceImpl implements UserService {
    
    

    /*注入dao*/
    @Autowired
    private AccountMapper accountMapper;


    public int addAccount(Account account) {
    
    
        return accountMapper.addAccount(account);
    }

    public int deleteAccount(int id) {
    
    
        return accountMapper.deleteAccount(id);
    }

    public int updateAccoount(Account account) {
    
    
        return accountMapper.updateAccoount(account);
    }

    public List<Account> queryAccount() {
    
    
        return accountMapper.queryAccount();
    }

    public Account queryAccountById(int id) {
    
    
        return accountMapper.queryAccountById(id);
    }

    public List<Account> queryAccountByName(String name) {
    
    
        return accountMapper.queryAccountByName(name);
    }
}

9.编写controller层

package com.lhh.controller;

import com.lhh.pojo.Account;
import com.lhh.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import java.util.List;

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

    @Autowired
    @Qualifier("userServiceImpl")
    private UserService userService;


    @RequestMapping("/queryAllAccount")
    private String test1(HttpServletRequest request, Model model) {
    
    
        List<Account> accounts = userService.queryAccount();
        model.addAttribute("list", accounts);
        return "allAccount";
    }

    @RequestMapping("/showAllAccount")
    private String showAllAccount(HttpServletRequest request, Model model) {
    
    
        List<Account> accounts = userService.queryAccount();
        model.addAttribute("list", accounts);
        return "allAccount";
    }

    @RequestMapping("/toUpdateAccount")
    private String toUpdateAccount(int id, Model model) {
    
    
        Account account = userService.queryAccountById(id);

        model.addAttribute("account", account);
        return "updateAccount";
    }

    @RequestMapping("/updateAccount")
    private String updateAccount(Account account, Model model) {
    
    
        System.out.println(account);
        int i = userService.updateAccoount(account);
        /*Account account1 = userService.queryAccountById(account.getId());

        model.addAttribute("account",account1);*/

        return "redirect:/account/queryAllAccount";
    }


    @RequestMapping("/del/{accountId}")
    private String del(@PathVariable("accountId") int id) {
    
    
        int i = userService.deleteAccount(id);
        return "redirect:/account/queryAllAccount";
    }


    @RequestMapping("/toAddAccount")
    private String toAddAccount() {
    
    
        return "addAccount";
    }

    @RequestMapping("/addAccount")
    private String AddAccount(Account account) {
    
    
        System.out.println(account);
        int i = userService.addAccount(account);
        System.out.println("i=" + i);
        return "redirect:/account/queryAllAccount";
    }

    @RequestMapping("/search")
    private String search(String name, Model model) {
    
    
        System.out.println(name);
        if (name == null || name == "") {
    
    
            /*给出一个提示:*/
            model.addAttribute("error", "没有查询到数据");
        }
        List<Account> accounts = userService.queryAccountByName("%" + name + "%");
        if (accounts == null) {
    
    
            //没有查询到该条数据
            /*显示全部数据*/
            accounts = userService.queryAccount();
        }
        model.addAttribute("list", accounts);
        return "allAccount";
    }
}

10.前端页面

index.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<html>
<head>
    <title>首页</title>
    <style type="text/css">
        a {
     
     
            text-decoration: none;
            color: black;
            font-size: 18px;
        }

        h3 {
     
     
            width: 180px;
            height: 38px;
            margin: 100px auto;
            text-align: center;
            line-height: 38px;
            background: deepskyblue;
            border-radius: 4px;
        }
    </style>
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>

<h3>
    <a href="${pageContext.request.contextPath}/account/queryAllAccount">点击进入列表页</a>


</h3>
</body>
</html>

addAccount.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>

<html>
<head>
    <title>新增书籍</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">

    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>新增用户</small>
                </h1>
            </div>
        </div>
    </div>

    <form action="${pageContext.request.contextPath}/account/addAccount" method="post">
        用户名称：<input type="text" name="username"><br><br><br>
        用户金额：<input type="text" name="money"><br><br><br>
        <input type="submit" value="添加">
    </form>

</div>

allAccount.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>书籍列表</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>

<div class="container">

    <div class="row clearfix">
        <div class="col-md-12 column">
            <div class="page-header">
                <h1>
                    <small>书籍列表 —— 显示所有书籍</small>
                </h1>
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-md-4 column">
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/account/toAddAccount">新增</a>
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/account/showAllAccount">显示所有</a>
        </div>

        <div class="col-md-8 column">
            <form action="${pageContext.request.contextPath}/account/search" class="form-inline" method="post">
                <span style="color: red;width: 30px">${
    
    error}</span>
                <input type="text" name="name" class="form-control">
                <input type="submit" value="搜索" style="border-radius: 5px;background-color: lightblue;" class="btn btn-primary">
            </form>
        </div>
    </div>

    <div class="row clearfix">
        <div class="col-md-12 column">
            <table class="table table-hover table-striped">
                <thead>
                <tr>
                    <th>账户姓名</th>
                    <th>账户金额</th>
                    <th>操作</th>
                </tr>
                </thead>

                <tbody>
                <c:forEach var="account" items="${requestScope.get('list')}">
                    <tr>
                        <td>${
    
    account.getUsername()}</td>
                        <td>${
    
    account.getMoney()}</td>
                        <td>
                            <a href="${pageContext.request.contextPath}/account/toUpdateAccount?id=${account.getId()}">更改</a>
                            |
                            <a href="${pageContext.request.contextPath}/account/del/${account.getId()}">删除</a>
                        </td>
                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
    <h1>${
    
    msg}</h1>
</div>

updateAccount.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>修改信息</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- 引入 Bootstrap -->
    <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">

    <div class="row clearfix">
    <div class="col-md-12 column">
        <div class="page-header">
            <h1>
                <small>修改账户信息</small>
            </h1>
        </div>
    </div>
</div>

    <form action="${pageContext.request.contextPath}/account/updateAccount" method="post">
        <input type="hidden" name="id" value="${account.getId()}"/>
        用户名称：<input type="text" name="username" value="${account.getUsername()}"/>
        用户金额：<input type="text" name="money" value="${account.getMoney()}"/>
        <input type="submit" value="提交"/>
    </form>
</div>

项目整体结构图:
在这里插入图片描述

总结

  1. ssm框架整合其实刚开始还是挺难得，要坚持下来，多去看看，尤其是那些配置文件，具体是要怎么配置，以及配置文件与配置文件之间的关系。花点时间多理解一下里面的每一个标签具体起了什么作用，理解一点，虽然有很多东西都是固定好的，不用改动。
  2. 还有一点就是学习框架，就是要自己多动手写代码，这算是我的第一个ssm框架项目，期间遇到了很多很多的问题，不过最终都得到了解决。当然这只算是一个很简单的入门，知道了业务是要怎么写的，但是对于真正掌握还是有很长一段路要走的。加油
  3. 在controller和前端页面之间花了挺多时间的，不过相比与以前还是轻松了不少。继续加油，多写写，可能成就感就出来了。

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