SSM整合案例(超详细)上

本文涉及的产品
云数据库 RDS MySQL,集群系列 2核4GB
推荐场景:
搭建个人博客
RDS MySQL Serverless 基础系列,0.5-2RCU 50GB
RDS MySQL Serverless 高可用系列,价值2615元额度,1个月
简介: SSM整合案例(超详细)

环境准备


前提须知


在SSM整合的时候,我们是用Spring框架去整合SpringMVC框架和MyBatis框架。

1.png



创建数据库和表结构


create database ssm;
create table account(
id int primary key auto_increment,
name varchar(100),
money double(7,2)
);

创建 Maven 工程 ssm


目录结构:

2.png


导入坐标并建立依赖


MyBatis 和 Spring 的版本对应关系

3.png

pom.xml


<?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.keafmd</groupId>
    <artifactId>ssm</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>ssm Maven Webapp</name>
    <!-- FIXME change it to the project's website -->
    <url>http://www.example.com</url>
    <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.version>5.2.7.RELEASE</spring.version>
        <slf4j.version>1.7.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mysql.version>5.1.49</mysql.version>
        <mybatis.version>3.4.5</mybatis.version>
    </properties>
    <dependencies>
        <!-- spring -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</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>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <!-- log end -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.1</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
    </dependencies>
    <build>
        <finalName>ssm</finalName>
        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
            <plugins>
                <plugin>
                    <artifactId>maven-clean-plugin</artifactId>
                    <version>3.1.0</version>
                </plugin>
                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>3.0.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.8.0</version>
                </plugin>
                <plugin>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.22.1</version>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.2.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-install-plugin</artifactId>
                    <version>2.5.2</version>
                </plugin>
                <plugin>
                    <artifactId>maven-deploy-plugin</artifactId>
                    <version>2.8.2</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
</project>

编写实体类


Account:


package com.keafmd.domain;
import java.io.Serializable;
/**
 * Keafmd
 *
 * @ClassName: Account
 * @Description: 账户实体类
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 21:03
 */
public class Account implements Serializable {
    private Integer id;
    private String name;
    private Double 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;
    }
    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

编写持久层接口


package com.keafmd.dao;
import com.keafmd.domain.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
 * Keafmd
 *
 * @ClassName: AccountDao
 * @Description: 账户dao接口
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 21:05
 */
public interface AccountDao {
    //查询所有账户
    public List<Account> findAll();
    //保存账户
    public void saveAccount(Account account);
}

编写业务层接口


package com.keafmd.service;
import com.keafmd.domain.Account;
import java.util.List;
/**
 * Keafmd
 *
 * @ClassName: AccountService
 * @Description:
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 21:15
 */
public interface AccountService {
    //查询所有账户
    public List<Account> findAll();
    //保存账户
    public void saveAccount(Account account);
}

编写业务层实现类


package com.keafmd.service.impl;
import com.keafmd.dao.AccountDao;
import com.keafmd.domain.Account;
import com.keafmd.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
 * Keafmd
 *
 * @ClassName: AccountServiceImpl
 * @Description: 账户的业务层实现类
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 21:16
 */
public class AccountServiceImpl implements AccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("业务层,查询所有。。。");
        return null;
    }
    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层,保存账户。。。");
    }
}

编写 Controller


package com.keafmd.controller;
/**
 * Keafmd
 *
 * @ClassName: AccountController
 * @Description: 账户控制器 web
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 21:19
 */
public class AccountController {
}


整合步骤


保证 Spring 框架在 web 工程中独立运行


第一步:编写 spring 配置文件并导入约束

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.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 开启注解扫描,要扫描的是service和dao层的注解,要忽略web层注解,因为web层让SpringMVC框架去管理 -->
    <context:component-scan base-package="com.keafmd">
        <!-- 配置要忽略的注解 -->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

第二步:使用注解配置业务层


AccountServiceImpl:


package com.keafmd.service.impl;
import com.keafmd.dao.AccountDao;
import com.keafmd.domain.Account;
import com.keafmd.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
 * Keafmd
 *
 * @ClassName: AccountServiceImpl
 * @Description: 账户的业务层实现类
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 21:16
 */
@Service("accountService")
public class AccountServiceImpl implements AccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("业务层,查询所有。。。");
        return null;
    }
    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层,保存账户。。。");
    }
}

第三步:导入log4j.properties配置文件


# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=info, CONSOLE, LOGFILE
# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

第四步:测试 spring 能否独立运行


测试代码:


package com.keafmd.test;
import com.keafmd.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * Keafmd
 *
 * @ClassName: TestSpring
 * @Description: 测试类
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 22:37
 */
public class TestSpring {
    @Test
    public void run1(){
        //加载配置文件
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        //获取对象
        AccountService as = (AccountService)ac.getBean("accountService");
        //调用方法
        as.findAll();
    }
}

运行结果:


业务层,查询所有。。。
Process finished with exit code 0

保证 SpringMVC 在 web 工程中独立运行


第一步:在 web.xml 中配置核心控制器(DispatcherServlet)


web.xml:


<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
    <display-name>Archetype Created Web Application</display-name>
    <!-- 配置前端控制器:服务器启动必须加载,需要加载springmvc.xml配置文件 -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置初始化参数,加载springmvc.xml配置文件 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!-- 启动服务器,创建该servlet -->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--解决中文乱码的过滤器-->
    <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>
</web-app>

第二步:编写 SpringMVC 的配置文件


springmvc.xml:


<?xml version="1.0" encoding="UTF-8"?>
<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">
    <!-- 开启注解扫描,扫描controller的注解,别的不扫描 -->
    <context:component-scan base-package="com.keafmd">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    <!-- 配置视图解析器 -->
    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- JSP文件所在的目录 -->
        <property name="prefix" value="/WEB-INF/pages/"/>
        <!-- 文件的后缀名 -->
        <property name="suffix" value=".jsp"/>
    </bean>
    <!-- 过滤静态资源,设置静态资源不过滤 -->
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/images/" mapping="/images/**"/>
    <mvc:resources location="/js/" mapping="/js/**"/>
    <!-- 开启对SpringMVC注解的支持 -->
    <mvc:annotation-driven/>
</beans>

第三步:编写 Controller 和 jsp 页面


index.jsp:


<%--
  Created by IntelliJ IDEA.
  User: Keafmd
  Date: 2021/2/17
  Time: 23:20
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <a href="account/findAll">测试查询</a>
</body>
</html>

AccountController:


package com.keafmd.controller;
import com.keafmd.domain.Account;
import com.keafmd.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 javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
/**
 * Keafmd
 *
 * @ClassName: AccountController
 * @Description: 账户控制器 web
 * @author: 牛哄哄的柯南
 * @date: 2021-02-17 21:19
 */
@Controller
@RequestMapping("/account")
public class AccountController {
    /**
     * 查询所有
     * @param 
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll(){
        System.out.println("表现层,查询所有账户信息。。。");
        return "list";
    }
}

list.jsp:


<%--
  Created by IntelliJ IDEA.
  User: Keafmd
  Date: 2021/2/18
  Time: 15:50
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h1>查询所有的账户</h1>
</body>
</html>

第四步:部署tomcat服务器


1.png

启动服务器,进行测试

2.png3.png


控制台输出:


表现层,查询所有账户信息。。。
相关实践学习
如何在云端创建MySQL数据库
开始实验后,系统会自动创建一台自建MySQL的 源数据库 ECS 实例和一台 目标数据库 RDS。
全面了解阿里云能为你做什么
阿里云在全球各地部署高效节能的绿色数据中心,利用清洁计算为万物互联的新世界提供源源不断的能源动力,目前开服的区域包括中国(华北、华东、华南、香港)、新加坡、美国(美东、美西)、欧洲、中东、澳大利亚、日本。目前阿里云的产品涵盖弹性计算、数据库、存储与CDN、分析与搜索、云通信、网络、管理与监控、应用服务、互联网中间件、移动服务、视频服务等。通过本课程,来了解阿里云能够为你的业务带来哪些帮助 &nbsp; &nbsp; 相关的阿里云产品:云服务器ECS 云服务器 ECS(Elastic Compute Service)是一种弹性可伸缩的计算服务,助您降低 IT 成本,提升运维效率,使您更专注于核心业务创新。产品详情: https://www.aliyun.com/product/ecs
相关文章
|
6月前
ssm使用全注解实现增删改查案例——showEmp.jsp
ssm使用全注解实现增删改查案例——showEmp.jsp
|
6月前
ssm使用全注解实现增删改查案例——showDept.jsp
ssm使用全注解实现增删改查案例——showDept.jsp
|
6月前
ssm使用全注解实现增删改查案例——web.xml
ssm使用全注解实现增删改查案例——web.xml
|
6月前
ssm使用全注解实现增删改查案例——applicationContext.xml
ssm使用全注解实现增删改查案例——applicationContext.xml
|
6月前
ssm使用全注解实现增删改查案例——EmpServiceImpl
ssm使用全注解实现增删改查案例——EmpServiceImpl
|
6月前
ssm使用全注解实现增删改查案例——DeptServiceImpl
ssm使用全注解实现增删改查案例——DeptServiceImpl
|
6月前
ssm使用全注解实现增删改查案例——IEmpService
ssm使用全注解实现增删改查案例——IEmpService
|
6月前
ssm使用全注解实现增删改查案例——IDeptService
ssm使用全注解实现增删改查案例——IDeptService
|
6月前
ssm使用全注解实现增删改查案例——Emp
ssm使用全注解实现增删改查案例——Emp
|
6月前
ssm使用全注解实现增删改查案例——Dept
ssm使用全注解实现增删改查案例——Dept