springmvc整合mybatis

1.1 整合思路

springmvc+mybaits的系统架构：

第一步：整合dao层

mybatis和spring整合，通过spring管理mapper接口。

使用mapper的扫描器自动扫描mapper接口在spring中进行注册。

第二步：整合service层

通过spring管理 service接口。

使用配置方式将service接口配置在spring配置文件中。

实现事务控制。

第三步：整合springmvc

由于springmvc是spring的模块，不需要整合。

1.引入maven依赖：

<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>5.1.1.RELEASE</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.1.1.RELEASE</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
      <scope>provided</scope>
    </dependency>
    <!-- jstl/jsp el表达式 -->
    <dependency>
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.apache.taglibs/taglibs-standard-impl -->
    <dependency>
      <groupId>org.apache.taglibs</groupId>
      <artifactId>taglibs-standard-impl</artifactId>
      <version>1.2.5</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.1</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.0.RELEASE</version>
    </dependency>



    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.18</version>
    </dependency>


    <!-- https://mvnrepository.com/artifact/commons-dbcp/commons-dbcp -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>

    <!--日志依赖包-->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.16</version>
    </dependency>
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.3</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.7.7</version>
    </dependency>

2.创建数据库信息文件 db.properties [在resources包下]：

db.driver=com.mysql.cj.jdbc.Driver
db.url=jdbc:mysql://localhost:3306/yh01_ssm_mybatis?useUnicode=true&characterEncoding=utf-8&useSSL=false&serverTimezone=GMT
db.username=root
db.password=123456
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000

3.创建日志文件log4j.properties [resourecs包下]：

###
log4j.rootLogger=debug,stdout,logfile
#####
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout
##
log4j.appender.logfile=org.apache.log4j.FileAppender
log4j.appender.logfile.File=src/main/resources/logs/zr.log
log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
log4j.appender.logfile.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss}%l%F%p%m%n

4.配置mybatis-config.xml [resourecs包下]：

<?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>
    <typeAliases>
        <package name="com.po" />
    </typeAliases>

</configuration>

5.配置spring-mybatis.xml [resourecs包下]：

<?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:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
   http://www.springframework.org/schema/aop
   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

    <!-- 引入配置文件 -->
    <bean id="propertyConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:db.properties" />
    </bean>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${db.driver}" />
        <property name="url" value="${db.url}" />
        <property name="username" value="${db.username}" />
        <property name="password" value="${db.password}" />
        <!-- 初始化连接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 连接池最大数量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 连接池最大空闲 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait" value="${maxWait}"></property>
    </bean>

    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>

        <property name="configLocation" value="classpath:mybatis-config.xml" />
    </bean>

    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>

    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>


</beans>

6.配置spring-service.xml [resourecs包下]：

<?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-3.0.xsd">

    <bean id="stuService" class="com.service.impl.StuServiceImpl"/>

</beans>

7.配置springmvc.xml [resourecs包下]：

<?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:mvc="http://www.springframework.org/schema/mvc"
       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/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">

    <!-- 添加注解模式 可以扫描controller、com.service、...
    这里让扫描controller，指定controller的包-->
    <context:component-scan base-package="com"/>

    <!-- 配置注解处理器映射器，功能:寻找执行类Controller -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!-- 配置sprigmvc视图解析器：解析逻辑视图 后台返回逻辑视图：index 视图解析器解析出真正物理视图：
    前缀+逻辑试图+后缀====/WEB-INF/jsps/index.jsp -->
    <bean        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsps/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
</beans>

8.编写实体类Student [com.po包下]

package com.po;

public class Student {
    private Integer id;
    private String username;
    private String password;
    private Integer clazznumber;
    private String clazzname;
    private int sex;
    private String address;
    private String email;
    private String phone;
    private int flag;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public Integer getClazznumber() {
        return clazznumber;
    }
    public void setClazznumber(Integer clazznumber) {
        this.clazznumber = clazznumber;
    }
    public String getClazzname() {
        return clazzname;
    }
    public void setClazzname(String clazzname) {
        this.clazzname = clazzname;
    }
    public int getSex() {
        return sex;
    }
    public void setSex(int sex) {
        this.sex = sex;
    }
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public int getFlag() {
        return flag;
    }
    public void setFlag(int flag) {
        this.flag = flag;
    }
    @Override
    public String toString() {
        return "Student [id=" + id + ", username=" + username + ", password=" + password + ", clazznumber="
                + clazznumber + ", clazzname=" + clazzname + ", sex=" + sex + ", address=" + address + ", email="
                + email + ", phone=" + phone + ", flag=" + flag + "]";
    }
}

9.新建StuDao [com.dao包下]

package com.dao;

import com.po.Student;

import java.util.List;

public interface StuDao {

    public Student FindStu(Integer id);

    public List<Student> FindStus();

    public void InsertStu(Student stu);

    public void DeleteStu(Integer id);

    //完全按照传过来的数据进行更新
    public void UpdateStu(Student stu);

}

10.新建StuService接口 [com.service包下]：

package com.service;

import com.po.Student;

import java.util.List;

public interface StuService {
    public Student FindStu(Integer id);

    public List<Student> FindStus();

    public void InsertStu(Student stu);

    public void DeleteStu(Integer id);

    //完全按照传过来的数据进行更新
    public void UpdateStu(Student stu);
}

11.新建StuServiceImpl实现类 [com.service.impl包下]：

package com.service.impl;

import com.dao.StuDao;
import com.po.Student;
import org.springframework.beans.factory.annotation.Autowired;
import com.service.StuService;

import java.util.List;

public class StuServiceImpl implements StuService {

    @Autowired
    private StuDao stuDao;

    @Override
    public Student FindStu(Integer id){
        Student stu=stuDao.FindStu(id);
        return stu;
    }

    @Override
    public List<Student> FindStus() {
        List<Student> stus=stuDao.FindStus();
        return stus;
    }

    @Override
    public void InsertStu(Student stu) {
        stuDao.InsertStu(stu);
    }

    @Override
    public void DeleteStu(Integer id) {
        stuDao.DeleteStu(id);
    }

    @Override
    public void UpdateStu(Student stu) {
        stuDao.UpdateStu(stu);
    }
}

12.新建StuController类 [com.controller包下]：

package com.controller;

import com.dao.StuDao;
import com.po.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.service.StuService;

@Controller
public class StuController {
    @Autowired
    private StuService stuService;

    @RequestMapping("/findStuById.do")
    public ModelAndView findStuById(){
        ModelAndView mv=new ModelAndView();
        Student stu=stuService.FindStu(1);
        mv.addObject("stu",stu);
        mv.setViewName("stu");
        System.out.println(stu);
        return mv;
    }



}

13.新建jsp  [WEB-INF/jsps包下]：

<%--
  Created by IntelliJ IDEA.
  User: 中国YH
  Date: 2019/10/22
  Time: 14:54
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<html>
<head>
    <title>学生信息</title>
    <h3>${stu.id}</h3>
    <h3>${stu.username}</h3>
    <h3>${stu.clazznumber}</h3>
    <h3>${stu.clazzname}</h3>
    <h3>${stu.address}</h3>
    <h3>${stu.sex}</h3>
</head>
<body>

</body>
</html>

14.配置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>

    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
    <!--编码过滤器-->
    <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>
    <!-- 防止Spring内存溢出监听器 -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>
    <!--在web.xml中，添加spring容器监听器，加载spring容器。-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-*.xml</param-value>
    </context-param>
    <!-- Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

15.测试：