SpringMVC (seven): Spring, SpringMVC integration and Mybatis

1, create a database table

CREATE TABLE `userinfo` (
  `id` int(10) PRIMARY KEY AUTO_INCREMENT,
  `username` varchar(64),
  `password` varchar(64),
  `age` int(11),
  `regtime` datetime ,
  `siteaddress` varchar(255)
)

INSERT INTO `userinfo` VALUES ('1', 'GitHub', '123456', null, '2019-12-01 15:09:18', 'https://github.com');
INSERT INTO `userinfo` VALUES ('2', 'Coding', '234567', null, '2019-12-03 15:09:28', 'https://coding.net');
INSERT INTO `userinfo` VALUES ('3', 'CSDN', '345678', null, '2019-12-05 15:09:34', 'https://www.csdn.net');
INSERT INTO `userinfo` VALUES ('4', 'Oschina', '456789', null, '2019-12-07 15:09:42', 'https://www.oschina.net');
INSERT INTO `userinfo` VALUES ('5', 'glot', '123456', null, '2019-11-27 15:09:47', 'https://glot.io/');

2, create a maven project and add the coordinates

    <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>5.0.2.RELEASE</spring.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mysql.version>5.1.6</mysql.version>
        <mybatis.version>3.4.5</mybatis.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <!-- spring aop -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</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-test</artifactId>
            <version>${spring.version}</version>
        </dependency>

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

        <!-- mysql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c3p0 -->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>

        <!-- mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>

        <!-- mybatis和spring整合 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>

        <!-- servlet依赖包 -->
        <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>

        <!-- springmvc -->
        <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>

        <!-- jstl标签依赖-->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!-- log日志 -->
        <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>

3, according to the table structure, the entity code and write interfaces implement serialization

package com.wedu.springmvc.domain;

import java.io.Serializable;
import java.util.Date;

/**
 * 用户实体
 */
public class UserInfo implements Serializable {

    private Integer id;
    private String username;
    private String password;
    private Integer age;
    private Date regtime;
    private String siteaddress;

    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 getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public Date getRegtime() {
        return regtime;
    }

    public void setRegtime(Date regtime) {
        this.regtime = regtime;
    }

    public String getSiteaddress() {
        return siteaddress;
    }

    public void setSiteaddress(String siteaddress) {
        this.siteaddress = siteaddress;
    }

    @Override
    public String toString() {
        return "UserInfo{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                ", regtime=" + regtime +
                ", siteaddress='" + siteaddress + '\'' +
                '}';
    }
}

4, write persistence code and add annotations to spring management

package com.wedu.springmvc.dao;

import com.wedu.springmvc.domain.UserInfo;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * 用户持久层接口
 */
@Repository("userInfoDao")
public interface IUserInfoDao {

    /**
     * 查询所有用户
     * @return
     */
    List<UserInfo> findAll();

    /**
     * 保存用户
     * @param userInfo
     */
    void saveUserInfo(UserInfo userInfo);
}

5, write business layer interface and implementation code and add annotations to spring management

Business Layer Interface

package com.wedu.springmvc.service;

import com.wedu.springmvc.domain.UserInfo;

import java.util.List;

/**
 * 用户业务层接口
 */
public interface IUserInfoService {

    /**
     * 查询所有用户
     * @return
     */
    List<UserInfo> findAll();

    /**
     * 保存用户
     * @param userInfo
     */
    void saveUserInfo(UserInfo userInfo);
}

Service layer interface code to achieve

package com.wedu.springmvc.service.impl;

import com.wedu.springmvc.dao.IUserInfoDao;
import com.wedu.springmvc.domain.UserInfo;
import com.wedu.springmvc.service.IUserInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service("userInfoService")
public class UserInfoServiceImpl implements IUserInfoService {

    @Autowired
    private IUserInfoDao userInfoDao;

    @Override
    public List<UserInfo> findAll() {
        return userInfoDao.findAll();
    }

    @Override
    public void saveUserInfo(UserInfo userInfo) {
        userInfoDao.saveUserInfo(userInfo);
    }
}

6, writing web layer code and add annotations to spring management

package com.wedu.springmvc.web;

import com.wedu.springmvc.domain.UserInfo;
import com.wedu.springmvc.service.IUserInfoService;
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;

/**
 * 用户web层
 */
@Controller
@RequestMapping("/userinfo")
public class UserInfoController {

    @Autowired
    private IUserInfoService userInfoService;

    /**
     * 查询所用用户
     * @param model
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll(Model model) {
        List<UserInfo> userInfos = userInfoService.findAll();
        model.addAttribute("userInfos",  userInfos);
        return "list";
    }

    /**
     * 保存用户
     * @param request
     * @param response
     * @param userInfo
     * @throws IOException
     */
    @RequestMapping("/saveUserInfo")
    public void saveUserInfo(HttpServletRequest request, HttpServletResponse response,UserInfo userInfo) throws IOException {
        userInfoService.saveUserInfo(userInfo);
        response.sendRedirect(request.getContextPath() + "/userinfo/findAll");
        return;
    }
}

7, writing front page index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <a href="/userinfo/findAll">测试查询</a><br/>

    <form action="/userinfo/saveUserInfo" method="post">
        用户姓名：<input type="text" name="username" /><br/>
        用户密码：<input type="text" name="password" /><br/>
        用户年龄：<input type="text" name="age"/><br/>
        注册时间：<input type="text" name="regtime"><br/>
        网站地址：<input type="text" name="siteaddress"/><br/>
        <input type="submit" value="保存"/><br/>
    </form>

</body>
</html>

8, write the front page list.jsp

<%@ 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>
    <h3>查询所有用户</h3>
    <c:forEach items="${userInfos}" var="userInfo">
        ${userInfo.username}
    </c:forEach>
</body>
</html>

9, arranged in 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>

  <!--设置配置文件的路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!-- 配置解决中文乱码过滤器 -->
  <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>

  <!-- 配置spring监听器,默认只加载WEB-INF目录下的applicationContext.xml配置文件 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!-- 配置前端控制器 -->
  <servlet>
    <servlet-name>dispatcherServlet</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>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

10, create and configure 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">

    <!-- 配置开启spring注解扫描,只扫描Controller-->
    <context:component-scan base-package="com.wedu.springmvc.web">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置视图解析器 -->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 配置springmvc注解支持 -->
    <mvc:annotation-driven />

</beans>

11. Create and configure spring-bean.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">

    <!-- 配置spring注解扫描,只处理service和dao -->
    <context:component-scan base-package="com.wedu.springmvc">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8"/>
        <property name="user" value="root"/>
        <property name="password" value="123456"/>
    </bean>

    <!--配置SqlSessionFactory工厂-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 自动扫描需要定义类别名的包，等同于mybatis配置文件中的typeAliases，简化映射文件中类的引用 -->
        <property name="typeAliasesPackage" value="com.wedu.springmvc.domain"/>
        <!-- 自动扫描mapping.xml文件,等同于mybatis配置文件中的mapper -->
        <property name="mapperLocations">
            <list>
                <value>classpath:mybatis/mapper/*.xml</value>
            </list>
        </property>
    </bean>

    <!-- 配置dao接口所在的包 -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.wedu.springmvc.dao"/>
    </bean>

    <!-- 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"/>
    </bean>

    <!-- 配置事务通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" 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.wedu.springmvc.service.impl.*.*(..))"/>
    </aop:config>

</beans>

12, create and configure the mapping file IUserInfoDao.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.wedu.springmvc.dao.IUserInfoDao">

    <!-- 查询所有用户信息 -->
    <select id="findAll" resultType="com.wedu.springmvc.domain.UserInfo">
        select * from userinfo
    </select>

    <!-- 保存用户 -->
    <insert id="saveUserInfo" parameterType="com.wedu.springmvc.domain.UserInfo">
        INSERT INTO userinfo (
            username,
            password,
            age,
            regtime,
            siteaddress
        )
        VALUES(
		    #{username},
		    #{password},
		    #{age},
		    #{regtime},
		    #{siteaddress}
    </insert>
</mapper>

Above is the spring and integrated springmvc mybatis process.