11、简单用户注册实现：maven+servlet+mybatis+spring

这里只是简单的使用spring整合mybatis的技术，所以不会有太多的业务逻辑，就一个练手的小模块，加深记忆！

 下面直接上代码：

1、业务接口

public interface UserDao {
    // 添加用户
    int addUser(User user);
}

2、业务接口实现类

package com.zhixi.dao;
import com.zhixi.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
/**
 * @author zhangzhixi
 */
@Component
public class UserDaoImpl implements UserDao {

    @Autowired
    // 等同于mybatis中的SelSession
    private SqlSessionTemplate sqlSessionTemplate;

    public void setSqlSessionTemplate(SqlSessionTemplate sqlSessionTemplate) {
        this.sqlSessionTemplate = sqlSessionTemplate;
    }

    @Override
    public int addUser(User user) {
        UserDao mapper = sqlSessionTemplate.getMapper(UserDao.class);
        return mapper.addUser(user);
    }
}

3、实体类

package com.zhixi.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @author zhangzhixi
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private int id;
    private String name;
    private String pwd;
}

4、servlet

package com.zhixi.servlet;

import com.zhixi.dao.UserDao;
import com.zhixi.pojo.User;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author zhangzhixi
 */
public class LoginServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");

        // 获取用户输入的数据
        String logId = request.getParameter("id");
        String logName = request.getParameter("name");
        String logPwd = request.getParameter("pwd");

        // 获取spring中的配置文件信息
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        System.out.println("容器对象信息：" + context);

        // 获取service
        UserDao userDao = context.getBean("userDaoImpl", UserDao.class);

        User user = new User();
        user.setId(Integer.parseInt(logId));
        user.setName(logName);
        user.setPwd(logPwd);
        userDao.addUser(user);

        // 请求转发
        request.getRequestDispatcher("welcome.jsp").forward(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        doGet(request, response);
    }
}

5、mapper.xml

<?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.zhixi.dao.UserDao">

    <insert id="addUser" parameterType="user">
        insert into user (id,name,pwd) values (#{id},#{name},#{pwd});
    </insert>

</mapper>

6、spring配置文件

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

       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd

        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--导入属性配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--
        DataSource:使用Spring的数据源替换Mybatis的配置c3pθ dbcp druid
     我们这里使用Spring提供的JDBC:org.springframework.jdbc.datasource
    -->
    <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>


    <!--sql会话工厂对象-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="datasource"/>
        <!--连通mybatis、-->
        <property name="configLocation" value="mybatis-config.xml"/>
        <!--绑定mapper-->
        <property name="mapperLocations" value="mapper/UserMapper.xml"/>
    </bean>

    <!--sqlSession对象-->
    <bean id="sessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>

    <!--统一管理bean-->
    <context:component-scan base-package="com.zhixi.dao"/>


</beans>

7、jdbc属性配置文件

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
jdbc.username=root
jdbc.password=zhixi1

8、mybatis配置文件

<?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>
    <!--设置实体类别名-->
    <typeAliases>
        <package name="com.zhixi.pojo"/>
    </typeAliases>
</configuration>

9、登录页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form method="post" action="${pageContext.request.contextPath}/login">
    <span>
        <div>
            id：<input type="text" name="id">
        </div>
    </span>
    <span>
        <div>
            姓名：<input type="text" name="name">
        </div>
    </span>
    <span>
        <div>
            密码：<input type="password" name="pwd">
        </div>
    </span>
    <span>
        <div>
            <input type="submit" value="注册">
        </div>
    </span>
</form>
</body>
</html>

10、注册成功页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h2>欢迎您注册成功</h2>
</body>
</html>

11、web项目配置文件

<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"
         metadata-complete="true">
<servlet>
    <servlet-name>LoginServlet</servlet-name>
    <servlet-class>com.zhixi.servlet.LoginServlet</servlet-class>
</servlet>
    <servlet-mapping>
        <servlet-name>LoginServlet</servlet-name>
        <url-pattern>/login</url-pattern>
    </servlet-mapping>
</web-app>

12、pom.xml（maven依赖）

<?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.zhixi</groupId>
  <artifactId>spring-14-用户注册功能</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!--servlet依赖-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
    </dependency>
    <!--jsp依赖-->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
    </dependency>
    <!--mysql-jdbc依赖-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.48</version>
    </dependency>
    <!--JSTL表达式依赖-->
    <dependency>
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl-api</artifactId>
      <version>1.2</version>
    </dependency>
    <!--standard标签库依赖-->
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    <!--mybatis依赖-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <!--自动生成set/get等方法的注解-->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.12</version>
    </dependency>
    <!--spring依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.12.RELEASE</version>
    </dependency>
    <!--springAOP的包-->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.4</version>
    </dependency>
    <!--ssm整合jdbc依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.12.RELEASE</version>
    </dependency>
    <!--mybatis整合依赖-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.5</version>
    </dependency>
  </dependencies>


</project>