Mybatis_02_CRUD

一、

1.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.cmdzz</groupId>
    <artifactId>mybatis_day02_CRUD</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <dependencies>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>

        <!--mysql连接-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>

        <!--log4j-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.12</version>
        </dependency>

        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.10</version>
        </dependency>


    </dependencies>

</project>

2.SqlMapConfgi.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">

<!-- mybatis的主配置文件 -->
<configuration>
    <!--配置环境
        default="mysql" 随便写 当时下面的 environment id 要一致
    -->
    <environments default="mysql">
        <!--配置mysql的环境-->
        <environment id="mysql">
            <!--配置事务类型-->
            <transactionManager type="JDBC"></transactionManager>
            <!--配置数据源（连接池）-->
            <dataSource type="POOLED">
                <!-- 配置连接数据库的4个基本信息 -->
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis57plage"/>
                <property name="username" value="root"/>
                <property name="password" value="123456"/>
            </dataSource>
        </environment>
    </environments>

    <!-- 指定映射配置文件的位置，映射配置文件指的是每个dao独立的配置文件 -->
    <mappers>
        <mapper resource="com/cmdzz/dao/IUserDao.xml"/>
    </mappers>

    <!-- 指定映射配置文件的位置，映射配置文件指的是每个dao独立的配置文件
       如果是用注解来配置的话，此处应该使用class属性指定被注解的dao全限定类名
   -->
  <!--  <mappers>
        <mapper class="com.cmdzz.dao.IUserDao"/>
    </mappers>-->
</configuration>

3.IUserDao.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.cmdzz.dao.IUserDao">
    <!--配置查询所有
        id="findAll" 是UserDao方法名 要一致
    -->
    <select id="findAll" resultType="com.cmdzz.domain.User">
        select * from user
    </select>

    <!--保存用户-->
    <insert id="saveUser" parameterType="com.cmdzz.domain.User">
        insert into user(username,address,sex,birthday)value (#{userName},#{address},#{sex},#{birthday})

    </insert>

    <!--更新用户-->
    <update id="updateUser" parameterType="com.cmdzz.domain.User">
        update user set username=#{userName},address=#{address},sex=#{sex},birthday=#{birthday}
        where
        id=#{id}

    </update>

    <!-- 删除用户 由于接口中只有一个参数传进来，所以占位符#{}里面可以随便写-->
    <delete id="deleteUser" parameterType="java.lang.Integer">
        delete from user where id = #{uid}
    </delete>
</mapper>