mybatis (2) 的配置文件 及 简单的 test

1...pom.xml 配置文件

<?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.wsc.mybatis</groupId>
    <artifactId>testMybatis05</artifactId>
    <version>1.0-SNAPSHOT</version>


    <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>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <dependency>
           <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>
</project>

2...jdbc.properties 

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/studentdb
jdbc.name=root
jdbc.password=wsc

3...SqlMapperConfig.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">
<configuration>
<!--    引入外部文件-->
<properties resource="jdbc.properties"></properties>
<!--    插件-->
<!--    <plugins>-->
<!--        <plugin interceptor=""></plugin>-->
<!--    </plugins>-->

<!--    类型转换-->
<!--    <typeHandlers></typeHandlers>-->

    <!--类别名映射 <typeAliases type="com.wsc.domain.User" alias=User">
       包的映射 引入包中所有的pojo 类型  配置别名  ：简单类名  不区分大小写
    -->
    <typeAliases>
        <package name="com.wsc.domain"/>
    </typeAliases>
<environments default="development">


    <environment id="development">

        <transactionManager type="JDBC"/>
        <dataSource type="POOLED">
            <property name="driver" value="${jdbc.driver}"/>
            <property name="url" value="${jdbc.url}"/>
            <property name="username" value="${jdbc.name}"/>
            <property name="password" value="${jdbc.password}"/>
        </dataSource>
    </environment>
</environments>
<mappers>
    <mapper resource="com/wsc/dao/StudentMapper.xml"/>
</mappers>
</configuration>

4...StudentMapper.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="StudentDao">
    <select id="find" resultType="Student">
        select * from student;
    </select>
    <!--    通过id查询-->
    <select id="selectById" resultType="Student" parameterType="java.lang.Integer">
        SELECT * FROM student where studentNo=#{studentNo};
    </select>
    <!--    删除通过id-->
    <delete id="drop"  parameterType="java.lang.Integer">
       Delete from student where studentNo=#{studentNo};
    </delete>
    <!--    添加-->
    <insert id="add" parameterType="Student">
            insert into student values (null,#{studentName},#{age},#{boreDate},#{classNo});
    </insert>
    <!--    修改数据-->
    <update id="change" parameterType="Student" >
        update student set studentName=#{studentName},age=#{age},boreDate=#{boreDate},classNo=#{classNo}  where studentNo=#{studentNo};
    </update>
    <!--    模糊查询-->
    <select id="queryByName"  resultType="Student" parameterType="java.lang.String">
        select * from student where studentName like "%"#{studentName}"%";
    </select>
</mapper>

5...dao层

package com.wsc.dao;

import com.wsc.domain.Student;

import java.util.List;


/**
 * @version 1.0
 * @ClassName StudentDao
 * @Description TODO
 * @Author WSC
 * @Date 2019/7/1 14:32
 **/
public interface StudentDao {
    /**
     * 查询所有数据
     * @return 数据集合
     */
    public List<Student> find();
    /**
     * 通过id删除
     * @param id
     */
    public void drop(Integer id);

    /**
     * 通过id 查询
     * @param id
     */
    public List<Student> selectById(Integer id);

    /**
     * 通过对象 添加数据
     * @param student
     */
    public void add(Student student);

    /**
     * 模糊查询
     * @param name
     */
    public List<Student> queryByName(String name);

    /**
     * 通过id 修改数据
     *
     */
    public void change(Student student);
}

6...test

package com.wsc.testMybatis;

import com.wsc.dao.StudentDao;
import com.wsc.domain.Student;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;

import java.util.Date;
import java.util.List;

/**
 * @version 1.0
 * @ClassName TestStudent
 * @Description TODO
 * @Author WSC
 * @Date 2019/7/1 14:43
 **/
public class TestStudent {
    public SqlSessionFactory sqlSessionFactory;
    @Before
    public void init(){
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(this.getClass().getClassLoader().getResourceAsStream("SqlMapperConfig.xml"));
    }

    /**
     * 查询所有
     */
    @Test
    public void selectAll(){
        SqlSession sqlSession = sqlSessionFactory.openSession();
        StudentDao mapper = sqlSession.getMapper(StudentDao.class);
        List<Student> all = mapper.find();
        for(Student student:all){
            System.out.println(student);
        }
        sqlSession.close();
    }

    /**
     * 删除通过id
     */
    @Test
    public void dropStudent(){
        SqlSession sqlSession = sqlSessionFactory.openSession();
        StudentDao mapper = sqlSession.getMapper(StudentDao.class);
        mapper.drop(15);
        sqlSession.commit();
        sqlSession.close();
    }
    @Test
    public void addStudent(){
        SqlSession sqlSession = sqlSessionFactory.openSession();
        StudentDao mapper = sqlSession.getMapper(StudentDao.class);
        Student student = new Student();
        student.setStudentName("sqwe国");
        student.setAge(20);
        Date date = new Date();
//        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");
//        String format = simpleDateFormat.format(date);
//        try {
//            Date parse = simpleDateFormat.parse(format);
//            System.out.println(parse);
//            student.setBoreDate(parse);
//        } catch (ParseException e) {
//            e.printStackTrace();
//        }
        student.setBoreDate(date);
        student.setClassNo(1);
        mapper.add(student);
        sqlSession.commit();
        sqlSession.close();
    }
}