整合ssm框架的步骤

一. 准备工作：创建一个存放学生数据的数据库表

CREATE DATABASE `ssm_student`;
USE `ssm_student`;
DROP TABLE IF EXISTS `student`;

# 建议前3句语句分开按顺序执行，不然可能会报错

CREATE TABLE `student` (
`stuId` INT(10) NOT NULL AUTO_INCREMENT COMMENT '学生id',
`stuName` VARCHAR(100) NOT NULL COMMENT '姓名',
`stuAge` INT(11) NOT NULL COMMENT '年龄',
KEY `stuId` (`stuId`)
) ENGINE=INNODB DEFAULT CHARSET=utf8

INSERT  INTO `student`(`stuId`,`stuName`,`stuAge`)VALUES
(1,'zxx',18),
(2,'wmd',19),
(3,'lyf',18);

在数据库表里创建好之后，可以将idea与数据库关联起来，方便后面写mapper.xml文件的sql语句。步骤如下：

1.点击idea右侧Database

ssm 连接sql server ssm连接数据库步骤_java

2.选择mysql

ssm 连接sql server ssm连接数据库步骤_tomcat_02

3.点击Text Connection,显示Succeeded,则成功，点击Apply,等待数秒后点击ok

ssm 连接sql server ssm连接数据库步骤_spring_03

4.上面步骤都完成后，你便可以看见你的本地数据库localhost，点击0 of 21 ,勾选我们刚刚创建的那个表。

ssm 连接sql server ssm连接数据库步骤_ssm 连接sql server_04

5.便可看见表中数据，到处关联完成。

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二. 开始搭建

1.创建web的maven项目

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2.添加目录结构：src下面创建java和resourses两个文件目录

ssm 连接sql server ssm连接数据库步骤_spring_07

3.添加maven依赖：在pom.xml里面添加项目所需坐标。（可能会随着开发添加更多）
<!--依赖注入：junit 数据库驱动，连接池，servlet，mybatis，mybatis-spring，spring -->
  <dependencies>
    <!--Junit-->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>
    <!--数据库驱动-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.47</version>
    </dependency>
    <!-- 数据库连接池 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>

    <!--Servlet - JSP -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <!--Mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.2</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.2</version>
    </dependency>

    <!--Spring-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.1.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.1.9.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.22</version>
    </dependency>
    <!--注意这个 -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>RELEASE</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.5</version>
    </dependency>
  </dependencies>

<!--静态资源导出问题 -->
      <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>
4.搭建项目的基本结构和配置框架（这里dao层下不要mapper和xml的包了，我写着后面发现错误了，找了3h,大家注意哈！！！）

ssm 连接sql server ssm连接数据库步骤_java_08

5.编写pojo实体类
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author jj
 * @date2022/6/28 14:14
 * 添加了lombok依赖，所以加上@Data就可以不用写get/set方法
 * 添加了@AllArgsConstructor，@NoArgsConstructor就可以不用写有参和无参构造方法
 */
@Data 
@AllArgsConstructor 
@NoArgsConstructor
public class Student {
    private int stuId;
    private String stuName;
    private int stuAge;
}

注意：如果不想自己写pojo的实体类的话，可以使用逆向工程，让idea自动生成。步骤如下：

  • .点开database找到你的表右键选择Scripted Extensions–>Generate POJOs.groovy,然后选择pojo目录下即可。
6.编写Dao层的 Mapper接口
<?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">
<mapper namespace="com.etime.dao.mapper.StudentMapper">
    <insert id="addStudent" parameterType="Student">
        insert into ssm_student.student(stuName, stuAge)
        VALUES (#{stuName},#{stuAge});
    </insert>
    <delete id="deleteStudentById" parameterType="Student">
        delete from ssm_student.student where stuId=#{stuId};
    </delete>

    <update id="updateStudent" parameterType="Student">
        update ssm_student.student set stuName=#{stuName},stuAge=#{stuAge} 
        where stuId=#{stuId};
    </update>
    <select id="queryStudentById" resultType="Student">
        select * from ssm_student.student where stuId=#{stuId};
    </select>
    <select id="queryAllStudent" resultType="Student">
        select * from ssm_student.student;
    </select>
</mapper>
7.编写Service层的接口和实现类
//StudentService接口：


package com.etime.service.impl;
import com.etime.pojo.Student;
import java.util.List;
public interface StudentService {

    //增加一个Student
    int addStudent(Student student);
    //根据id删除一个Student
    int deleteStudentById(int id);
    //更新Student
    int updateStudent(Student student);
    //根据id查询,返回一个Student
    Student queryStudentById(int id);
    //查询全部Student,返回list集合
    List<Student> queryAllStudent();
}


//StudentServiceimpl实现类：


package com.etime.service.stu;
import com.etime.dao.mapper.StudentMapper;
import com.etime.pojo.Student;
import com.etime.service.impl.StudentService;
import java.util.List;


public class StudentServiceImpl implements StudentService {

    //调用dao层的操作，设置一个set接口，方便Spring管理
    private StudentMapper studentMapper;
    public void setStudentMapper(StudentMapper studentMapper) {
        this.studentMapper = studentMapper;
    }
    @Override
    public int addStudent(Student student) {
        return studentMapper.addStudent(student);
    }
    @Override
    public int deleteStudentById(int id) {
        return studentMapper.deleteStudentById(id);
    }
    @Override
    public int updateStudent(Student student) {
        return studentMapper.updateStudent(student);
    }
    @Override
    public Student queryStudentById(int id) {
        return studentMapper.queryStudentById(id);
    }
    @Override
    public List<Student> queryAllStudent() {
        return studentMapper.queryAllStudent();
    }
}

三.接下来就是最麻烦的配置了！！！

1.数据库配置文件 database.properties
jdbc.driver=com.mysql.jdbc.Driver
serverTimezone=Asia/Shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456
2.配置mybatis-config.xml文件
<?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>
        <!--日志文件 -->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
<!--    配置数据源，交给spring去做-->
    <typeAliases>
        <package name="com.etime.pojo"/>
    </typeAliases>
<mappers>
   <mapper class="com.etime.dao.mapper.StudentMapper"/>
</mappers>
</configuration>
3.配置spring-dao.xml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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">

<!--    1.关联数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"/>

<!--    2.连接池  dbcp C3P0 druid hikari-->
    <bean id="dateSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!-- c3p0连接池的私有属性 -->
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 关闭连接后不自动commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>
<!--    3.sqlsessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dateSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--配置dao的扫描包 动态实现dao接口可以注入到spring容器中-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlsessionfactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 要扫描的dao包-->
        <property name="basePackage" value="com.etime.dao"/>
     </bean>
</beans>
4.配置spring-service.xml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:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/cache"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/aop
       https://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">

    <!-- -->
    <!--1.扫描service下的包 -->
    <context:component-scan base-package="com.etime.service"/>
    <!--2.将我们所有的业务类注入到spring 可以通过注解或者配置实现 -->
    <bean id="StudentServiceImpl" class="com.etime.service.impl.StudentServiceImpl">
        <property name="studentMapper" ref="studentMapper"/>
    </bean>
    <!--  3.声明事物-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--        注入数据源-->
        <property name="dataSource" ref="dateSource"/>
    </bean>
</beans>
5.配置spring-mvc.xml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: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
   https://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 配置SpringMVC -->
    <!-- 1.开启SpringMVC注解驱动 -->
    <mvc:annotation-driven/>
    <!-- 2.静态资源默认servlet配置-->
    <mvc:default-servlet-handler/>

    <!-- 3.配置jsp 显示ViewResolver视图解析器 -->
    <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.etime.controller" />

</beans>
6.配置applicationContext.xml文件–整合
<?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="classpath:spring-dao.xml"/>
    <import resource="spring-service.xml"/>
    <import resource="classpath:spring-mvc.xml"/>
</beans>
7.配置web.xml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:applicationContext.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>

到这里，一个ssm项目就已经基本配置完成了，现在就需要写Controller和视图层的内容即可

1、BookController 类编写 ， 方法一：查询全部学生
import java.util.List;

/**
 * @author jj
 * @date2022/6/28 16:53
 */
@Controller
@RequestMapping("/student")
public class StudentController {
    @Autowired
    @Qualifier("StudentServiceImpl")
    private StudentService studentService;

    @RequestMapping("/all")
    public String list(Model model){
        List<Student> list = studentService.queryAllStudent();
        model.addAttribute("list",list);
        return "allstudent";
    }
}
2.在jsp包下编写allstudent.jsp文件（注意要和上面的return返回的名字一样）
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
  Created by IntelliJ IDEA.
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<html>
<head>
    <title>学生信息展示</title>
</head>
<body>
<div class="container">
    <div class="row clearfix">
        <div class="col-md-12 column"></div>
        <div class="page-header">
            <h1>
                <small>学生管理 --- 显示所有学生信息</small>
            </h1>
        </div>
    </div>
    <div class="row">
        <div class="row-md-4 column">
            <br/>
            <a class="btn btn-primary" href="#">添加书籍</a>
            <a class="btn btn-primary" href="${pageContext.request.contextPath}/student/all">显示所有书籍</a>
        </div>
    </div>
    <div class="row clearfix">
        <div class="col-md-12 column">
            <table class="table table-hover table-striped">
                <thead>
                <tr>
                    <th>学生编号</th>
                    <th>学生名称</th>
                    <th>学生年龄</th>
                    <th>操作</th>

                </tr>
                </thead>
                <tbody>
                <c:forEach var="student" items="${list}">
                    <tr>
                        <td>${student.stuId}</td>
                        <td>${student.stuName}</td>
                        <td>${student.stuAge}</td>
                        <td>

                            <a href="#">修改</a>
                              |  
                            <a href="#">删除</a>
                        </td>

                    </tr>
                </c:forEach>
                </tbody>
            </table>
        </div>
    </div>
</div>
</body>
</html>
3.配置tomcat，启动程序。

ssm 连接sql server ssm连接数据库步骤_ssm 连接sql server_09

ssm 连接sql server ssm连接数据库步骤_java_10

ssm 连接sql server ssm连接数据库步骤_maven_11

4.访问：localhost:8080/student/all 运行（这里加了点bootstrap框架的样式）。

ssm 连接sql server ssm连接数据库步骤_spring_12

到此，一个简单的ssm项目就已经整合完毕。其他的增删改查等功能只需要写好controller层和前端界面即可。