SSM整合实现增删改查操作【保姆式教学】

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发布于 2022-09-01 12:03:58

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发布于 2022-09-01 12:03:58

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SSM整合实现增删改查操作【保姆式教学】

准备工作

环境准备

IDEA
MySQL 5.7.31
Tomcat 8.5.64
Maven 3.6.3

这是我的环境，版本别差太大就没问题。

数据库准备

CREATE DATABASE `ssmtest`;

USE `ssmtest`;

DROP TABLE IF EXISTS `user`;

CREATE TABLE `user`(
	`userid` INT(10) NOT NULL AUTO_INCREMENT COMMENT '用户ID',
	`username` VARCHAR(100) NOT NULL COMMENT '用户名',
	`password` VARCHAR(100) NOT NULL COMMENT '用户密码',
	`value` INT(10) NOT NULL DEFAULT 1 COMMENT '状态，1正常',
	 KEY `userid`(`userid`)
	
) ENGINE=INNODB DEFAULT CHARSET=utf8;



INSERT INTO `user`(`userid`,`username`,`password`,`value`)VALUES
(1,'keafmd','666',1),
(2,'keafod','888',1);

开始干活

新建个Maven项目ssmtest，加上Web支持

创建完成的效果：

添加依赖

<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>
    <!--统一的版本管理-->
    <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>

  <!--Junit-->
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    <scope>compile</scope>
  </dependency>

  <!--数据库驱动-->
  <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${mysql.version}</version>
  </dependency>

  <!-- 数据库连接池 -->
  <dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1.1</version>
    <type>jar</type>
    <scope>compile</scope>
  </dependency>

  <!--Servlet - JSP -->
  <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>

  <!--Mybatis-->
  <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>

  <!-- log -->
  <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>

</dependencies>

完整的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>ssmtest</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>ssmtest 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>
    <!--统一的版本管理-->
    <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>

    <!--Junit-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>compile</scope>
    </dependency>

    <!--数据库驱动-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

    <!-- 数据库连接池 -->
    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.1</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>

    <!--Servlet - JSP -->
    <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>

    <!--Mybatis-->
    <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>

    <!-- log -->
    <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>

  </dependencies>

  <build>
    <finalName>ssmtest</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>

创建entity、dao、service、controller包

实体类编写

添加lombook

User：

package com.keafmd.entity;

import lombok.Data;

import java.io.Serializable;

/** * Keafmd * * @ClassName: User * @Description: 用户实体类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:11 * @Blog: https://keafmd.blog.csdn.net/ */
@Data
public class User implements Serializable { 
   

    private Integer userId;
    private String userName;
    private String password;

}

持久层接口编写

IUserDao ：

package com.keafmd.dao;

import com.keafmd.entity.User;

import java.util.List;

/** * Keafmd * * @ClassName: IUserDao * @Description: 用户dao接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:20 * @Blog: https://keafmd.blog.csdn.net/ */
public interface IUserDao { 
   

    //查询所有
    public List<User> findAll();

    //保存用户
    public void saveUser(User user);
}

业务层接口编写

IUserService：

package com.keafmd.service;

import com.keafmd.entity.User;

import java.util.List;

/** * Keafmd * * @ClassName: IUserService * @Description: user业务层接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:23 * @Blog: https://keafmd.blog.csdn.net/ */
public interface IUserService { 
   

    //查询所有
    public List<User> findAll();

    //保存用户
    public void saveUser(User user);

}

业务层实现类编写

UserServiceImpl ：

package com.keafmd.service.impl;

import com.keafmd.entity.User;
import com.keafmd.service.IUserService;

import java.util.List;

/** * Keafmd * * @ClassName: UserService * @Description: user业务层实现类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:25 * @Blog: https://keafmd.blog.csdn.net/ */
public class UserServiceImpl implements IUserService { 
   
    @Override
    public List<User> findAll() { 
   
        System.out.println("user业务层实现类--findAll");
        return null;
    }

    @Override
    public void saveUser(User user) { 
   
        System.out.println("user业务层实现类--saveUser");
    }
}

表现层编写

UserController ：

package com.keafmd.controller;

/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
public class UserController { 
   
}

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

在 UserServiceImpl 方法上加上 @Service("userService").

package com.keafmd.service.impl;

import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.stereotype.Service;

import java.util.List;

/** * Keafmd * * @ClassName: UserService * @Description: user业务层实现类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:25 * @Blog: https://keafmd.blog.csdn.net/ */
@Service("userService")
public class UserServiceImpl implements IUserService { 
   
    @Override
    public List<User> findAll() { 
   
        System.out.println("user业务层实现类--findAll");
        return null;
    }

    @Override
    public void saveUser(User user) { 
   
        System.out.println("user业务层实现类--saveUser");
    }
}

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;

import com.keafmd.service.IUserService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/** * Keafmd * * @ClassName: TestSpring * @Description: 测试 spring 能否独立运行 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:38 * @Blog: https://keafmd.blog.csdn.net/ */
public class TestSpring { 
   

    @Test
    public void test1(){ 
   
        //加载配置文件
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        //获取对象
        IUserService userService = (IUserService)ac.getBean("userService");
        //调用方法
        userService.findAll();

    }
}

测试效果：

保证 SpringMVC 在 web 工程中独立运行

第一步：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>

第二步：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>

第三步：编写 Controller 和 jsp 页面

UserController ：

package com.keafmd.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 
   

    @RequestMapping("/findAll")
    public String findAll(){ 
   
        System.out.println("表现层--查询所有用户");
        return "user_list";
    }
}

index.jsp：

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2021/4/19
  Time: 9:52
  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="user/findAll">查询所有用户</a>

</body>
</html>

user_list.jsp：

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2021/4/19
  Time: 9:55
  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>查询所有用户</h1>

</body>
</html>

第四步：部署tomcat服务器

-Dfile.encoding=utf-8

第五步：启动服务器，进行测试

点击后的效果：

Spring 整合 SpringMVC 的框架

第一步：配置监听器实现启动服务创建容器

<!-- 配置 spring 提供的监听器，用于启动服务时加载容器 。 该监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件 -->
<listener>
  <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 手动指定 spring 配置文件位置 -->
<context-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext.xml</param-value>
</context-param>

完整的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>


  <!-- 配置 spring 提供的监听器，用于启动服务时加载容器 。 该监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 手动指定 spring 配置文件位置 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>


  <!--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：在controller中注入service对象，调用service对象的方法进行测试

UserController ：

package com.keafmd.controller;

import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 
   

    @Autowired
    private IUserService userService;


    @RequestMapping("/findAll")
    public String findAll(){ 
   
        System.out.println("表现层--查询所有用户");
        
        //调用service的方法
        userService.findAll();

        return "user_list";
    }
}

重启Tomcat点击查询所有用户，控制台输出效果如下：

保证 MyBatis 框架在 web 工程中独立运行

第一步：在web项目中编写SqlMapConfig.xml的配置文件，编写核心配置文件

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>
    <!-- 配置连接数据库的信息 -->
    <properties resource="jdbcConfig.properties"></properties>
    <!-- 配置mybatis的环境 -->
    <environments default="mysql">
        <environment id="mysql">
            <!-- 配置事务管理 -->
            <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>

    <!-- 指定映射文件位置 -->
    <mappers>
        <!--<mapper class="com.keafmd.dao.IAccountDao"/> <mapper class="com.keafmd.dao.IUserDao"/>-->
        <package name="com.keafmd.dao"/>
    </mappers>
</configuration>

jdbcConfig.properties：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmtest
jdbc.username=root
jdbc.password=18044229

第二步：在IUserDao接口的方法上添加注解，编写SQL语句

IUserDao ：

package com.keafmd.dao;

import com.keafmd.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import java.util.List;

/** * Keafmd * * @ClassName: IUserDao * @Description: 用户dao接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:20 * @Blog: https://keafmd.blog.csdn.net/ */
public interface IUserDao { 
   

    //查询所有
    @Select("select * from user")
    public List<User> findAll();

    //保存用户
    @Insert("insert into user(username,password) values(#{userName},#{password})")
    public void saveUser(User user);
}

第三步：编写测试的方法

TestMybatis ：

package com.keafmd;

import com.keafmd.dao.IUserDao;
import com.keafmd.entity.User;
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.After;
import org.junit.Before;
import org.junit.Test;

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

/** * Keafmd * * @ClassName: TestMybatis * @Description: * @author: 牛哄哄的柯南 * @Date: 2021-04-19 10:20 * @Blog: https://keafmd.blog.csdn.net/ */
public class TestMybatis { 
   
    private InputStream in;
    private SqlSessionFactory factory;
    private SqlSession session;
    private IUserDao userDao;

    @Before
    public void init() throws Exception{ 
   
        //加载配置文件
        in = Resources.getResourceAsStream("SqlMapConfig.xml");
        //创建SqlSessionFactory对象
        factory = new SqlSessionFactoryBuilder().build(in);
        //创建SqlSession对象
        session = factory.openSession();
        //获取到代理对象
        userDao = session.getMapper(IUserDao.class);
    }

    @After
    public void destory() throws Exception{ 
   
        session.commit();
        session.close();
        in.close();
    }

    /** * 查询所有 */
    @Test
    public void run1(){ 
   
        List<User> users = userDao.findAll();
        for (User user : users) { 
   
            System.out.println(user);
        }
    }

    /** * 测试保存 */
    @Test
    public void saveUser(){ 
   
        User user = new User();
        user.setUserName("毛利小五郎");
        user.setPassword("999");
        userDao.saveUser(user);
    }


}

测试效果：

Spring 整合 MyBatis 框架

把 mybatis 配置文件（SqlMapConfig.xml）中内容配置到 spring 配置文件中同时，把 mybatis 配置文件的内容清掉。

第一步：把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中

把以下内容添加到applicationContext.xml配置文件中：

<!--Spring整合Mybatisl框架-->
<!-- 配置C3P0的连接池对象 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
    <property name="driverClass" value="com.mysql.jdbc.Driver"/>
    <property name="jdbcUrl" value="jdbc:mysql:///ssmtest"/>
    <property name="user" value="root"/>
    <property name="password" value="18044229"/>
</bean>
<!-- 配置SqlSession的工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置扫描dao的包 -->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.keafmd.dao"/>
</bean>

<!--SqlMapConfig.xml和jdbcConfig.properties可以删除了-->

再添加上配置Spring框架声明式事务管理：

<!--配置Spring框架声明式事务管理-->
<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置事务的通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
    <tx:attributes>
        <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
        <tx:method name="*" isolation="DEFAULT"/>
    </tx:attributes>
</tx:advice>
<!-- 配置AOP增强 -->
<aop:config>
    <!--<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.keafmd.service.impl.*.*(..))"/>-->
    <!-- 配置切入点表达式 -->
    <aop:pointcut expression="execution(* com.keafmd.service.impl.*.*(..))" id="pt1"/>
    <!-- 建立通知和切入点表达式的关系 -->
    <aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
</aop:config>

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>


    <!--Spring整合Mybatisl框架-->
    <!-- 配置C3P0的连接池对象 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql:///ssmtest?characterEncoding=utf8"/>
        <property name="user" value="root"/>
        <property name="password" value="root"/>
    </bean>
    <!-- 配置SqlSession的工厂 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 配置扫描dao的包 -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.keafmd.dao"/>
    </bean>

    <!--SqlMapConfig.xml和jdbcConfig.properties可以删除了-->

    <!--配置Spring框架声明式事务管理-->
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 配置事务的通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="*" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>
    <!-- 配置AOP增强 -->
    <aop:config>
        <!--<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.keafmd.service.impl.*.*(..))"/>-->
        <!-- 配置切入点表达式 -->
        <aop:pointcut expression="execution(* com.keafmd.service.impl.*.*(..))" id="pt1"/>
        <!-- 建立通知和切入点表达式的关系 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
    </aop:config>


</beans>

第三步：在IUserDao接口中添加@Repository注解

package com.keafmd.dao;

import com.keafmd.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

/** * Keafmd * * @ClassName: IUserDao * @Description: 用户dao接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:20 * @Blog: https://keafmd.blog.csdn.net/ */
@Repository
public interface IUserDao { 
   

    //查询所有
    @Select("select * from user")
    public List<User> findAll();

    //保存用户
    @Insert("insert into user(username,password) values(#{userName},#{password})")
    public void saveUser(User user);
}

第四步：在UserServiceImpl中注入dao对象

package com.keafmd.service.impl;

import com.keafmd.dao.IUserDao;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/** * Keafmd * * @ClassName: UserService * @Description: user业务层实现类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:25 * @Blog: https://keafmd.blog.csdn.net/ */
@Service("userService")
public class UserServiceImpl implements IUserService { 
   

    @Autowired
    IUserDao userDao;

    @Override
    public List<User> findAll() { 
   
        System.out.println("user业务层实现类--findAll");
        return userDao.findAll();
    }

    @Override
    public void saveUser(User user) { 
   
        System.out.println("user业务层实现类--saveUser");
        userDao.saveUser(user);
    }
}

第五步：修改 UserController 代码

package com.keafmd.controller;

import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
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: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 
   

    @Autowired
    private IUserService userService;


    @RequestMapping("/findAll")
    public String findAll(Model model){ 
   
        System.out.println("表现层--查询所有用户");

        //调用service的方法
        List<User> userList = userService.findAll();
        model.addAttribute("userList",userList);

        return "user_list";
    }

    @RequestMapping("/save")
    public void save(User user , HttpServletRequest request, HttpServletResponse response) throws IOException { 
   
        userService.saveUser(user);
        response.sendRedirect(request.getContextPath()+"/user/findAll");
        return;

    }
}

第五步：修改 user_list.jsp 代码，实现显示账户信息

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2021/4/19
  Time: 9:55
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h1>查询所有用户</h1>

<%--    ${ 
   userList}--%>

    <c:forEach items="${userList}" var="user">
        ${ 
   user.userName}
        ${ 
   user.password}
    </c:forEach>

</body>
</html>

第六步：测试查询

效果：

第七步：测试保存

修改index.jsp代码，添加测试保存的代码：

<%--
  Created by IntelliJ IDEA.
  User: lenovo
  Date: 2021/4/19
  Time: 9:52
  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="user/findAll">查询所有用户</a>

    <h1>测试保存</h1>
    <form action="user/save" method="post">
        账户名：<input type="text" name="userName" /><br/>
        密码：<input type="text" name="password" /><br/>
        <input type="submit" value="保存">
    </form>

</body>
</html>

修改 UserController 代码，添加save方法：

package com.keafmd.controller;

import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
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: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 
   

    @Autowired
    private IUserService userService;


    @RequestMapping("/findAll")
    public String findAll(Model model){ 
   
        System.out.println("表现层--查询所有用户");

        //调用service的方法
        List<User> userList = userService.findAll();
        model.addAttribute("userList",userList);

        return "user_list";
    }

    @RequestMapping("/save")
    public void save(User user , HttpServletRequest request, HttpServletResponse response) throws IOException { 
   
        userService.saveUser(user);
        response.sendRedirect(request.getContextPath()+"/user/findAll");
        return;

    }
}

测试效果：

增删改查（前后端分离）

查找

实际开发中，多为前后端分离，所以我们需要修改我们的表现层代码，同时需要添加上jackson的依赖。

<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-core</artifactId>
  <version>2.11.0</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.11.0</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-annotations</artifactId>
  <version>2.11.0</version>
</dependency>

UserController：

package com.keafmd.controller;

import com.keafmd.common.CommonResult;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 
   

    @Autowired
    private IUserService userService;


    // http://127.0.0.1:8080/ssmtest/user/findAll
    @RequestMapping("/findAll")
    @ResponseBody
    public List<User> findAll(){ 
   
        System.out.println("表现层--查询所有用户");

        //调用service的方法
        List<User> userList = userService.findAll();
// model.addAttribute("userList",userList);

// return "user_list";

        return userList;
    }

    @RequestMapping("/save")
    public void save(User user , HttpServletRequest request, HttpServletResponse response) throws IOException { 
   
        userService.saveUser(user);
        response.sendRedirect(request.getContextPath()+"/user/findAll");
        return;

    }
}

访问： http://127.0.0.1:8080/ssmtest/user/findAll

前端vue项目

这里我们需要有相关的环境，这里不细说了。

创建个空的vue项目

找个文件夹进入命令行，输入：vue create ssmtest

关闭代码格式化校验工具

在项目的根目录（与package.json同级）中，添加名称为vue.config.js的文件，就能自动被vue-cli加载。

module.exports = { 
   
    lintOnSave:false, //关闭代码格式化校验工具
    devServer:{ 
   
        port: 80 //修改启动端口
    }
}

安装相关的工具

1、安装vue-router

npm install vue-router

2、安装 element-ui插件

npm i element-ui -S

3、安装axios

npm install axios

目录结构

编写main.js

在这里引入各种组件，写上router。

import Vue from 'vue'
import App from './App.vue'

import router from '@/router'

import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';

Vue.use(ElementUI);

Vue.config.productionTip = false

new Vue({ 
   

	render: h => h(App),
	router
}).$mount('#app')

编写App.vue

在div中写入<router-view></router-view>，用路由控制界面。

<template>
  <div id="app">

	<router-view></router-view>

  </div>
</template>

<script> // import First from './components/First.vue' export default { 
     name: 'App', components: { 
     // First } } </script>

<style> #app { 
     font-family: Avenir, Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-align: center; color: #2c3e50; margin-top: 60px; } </style>

编写router文件夹下的index.js

在这里使用router配置各种路径

import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)
// import A from '@/components/A'
// import B from '@/components/B'

export default new Router({ 
   
	mode: 'history',
	routes: [{ 
   
			path: '/',
			name: 'Index',
			component: () => import('@/views'),
			children: [{ 
   
					path: '/user',
					name: 'User',
					component: () => import('@/views/user')
				}
			]
		}
		// ,
		// { 
   
		// path: '/user',
		// name: 'User',
		// component: () => import('@/views/user')
		// }
		// { 
   
		// path: '/aaa',
		// name: 'A',
		// component: A
		// },
		// { 
   
		// path: '/bbb',
		// name: 'B',
		// component: B
		// }
	]
})

编写公共部分的menu.vue

注意：在 el-menu 标签里注入router。

<template>

    <el-menu router >

        <el-submenu index="1">
            <template slot="title">
                <span>管理</span>
            </template>
            <el-menu-item-group>
                <el-menu-item index="/user"> <i class="el-icon-location"></i>用户管理</el-menu-item>
                <!-- <el-menu-item index="/menu"> <i class="el-icon-location"></i>菜单管理</el-menu-item> -->
            </el-menu-item-group>
        </el-submenu>

       <!-- <el-submenu index="2"> <template slot="title"> <span>ElementUI组件</span> </template> <el-menu-item-group> <el-menu-item index="/table"> <i class="el-icon-location"></i>表格组件</el-menu-item> </el-menu-item-group> </el-submenu> -->

    </el-menu>

</template>

<script> export default { 
     name: 'Menu' } </script>

<style> </style>

编写views下的index.vue

<template>

	<el-container class="wrap">
		<el-header class="header">
			<el-row>
				<el-col :span="20">信息系统</el-col>
				<el-col :span="4">
					<el-dropdown>
						<span class="el-dropdown-link">
							keafmd<i class="el-icon-arrow-down el-icon--right"></i>
						</span>
						<el-dropdown-menu slot="dropdown">
							<el-dropdown-item command="Personal">个人设置</el-dropdown-item>
							<el-dropdown-item command="Logout">退出</el-dropdown-item>
						</el-dropdown-menu>
					</el-dropdown>


				</el-col>
			</el-row>

		</el-header>
		<el-container>
			<el-aside width="200px" class="aside">
				<Menu></Menu>
			</el-aside>
			<el-main>
				<!-- <User></User> -->
				<router-view></router-view>
			</el-main>
		</el-container>
	</el-container>

</template>

<script> // import User from './user/index.vue' import Menu from '@/components/menu' export default { 
     name: 'Index', components: { 
     Menu // User }, data() { 
     return { 
    } }, methods: { 
     }, created() { 
    } } </script>

<style scoped> .wrap { 
     height: 100vh; } .header { 
     border-bottom: 1px solid aqua; } .aside { 
     border-right: 1px solid aqua; } </style>

编写views下的user下的index.vue

<template>
	<div>

		<el-table :data="tableData.filter(data => !search || data.name.toLowerCase().includes(search.toLowerCase()))" style="width: 100%">
			<el-table-column label="userName" prop="userName">
			</el-table-column>
			<el-table-column label="Password" prop="password">
			</el-table-column>
			<el-table-column align="right">
				<template slot="header" slot-scope="scope">
					<el-input v-model="search" size="mini" placeholder="输入关键字搜索" />
				</template>
				<template slot-scope="scope">
					<el-button size="mini" @click="handleEdit(scope.$index, scope.row)">Edit</el-button>
					<el-button size="mini" type="danger" @click="handleDelete(scope.$index, scope.row)">Delete
					</el-button>
				</template>
			</el-table-column>
		</el-table>



	</div>
</template>

<script> import axios from 'axios'; axios.defaults.baseURL = 'http://127.0.0.1:8080/ssmtest'; export default { 
     name: 'User', components: { 
     }, data() { 
     return { 
     tableData: [], search: '' } }, methods: { 
     getData() { 
     axios.get('/user/findAll') .then((res) => { 
     this.tableData = res.data }) .catch(function(error) { 
     console.log(error); }); }, handleEdit(index, row) { 
     console.log(index, row); }, handleDelete(index, row) { 
     console.log(index, row); } }, created() { 
     this.getData(); } } </script>

<style> </style>

效果展示

查询效果：

看完如果对你有帮助，感谢点赞支持！ 如果你是电脑端，看到右下角的 “一键三连” 了吗，没错点它[哈哈]

加油！

共同努力！

Keafmd

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原始发表：2022年5月2，如有侵权请联系 cloudcommunity@tencent.com 删除

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