mybatis 的 配置文件及简单test

1... sqlMapperConfig.xml (配置：数据源 和 映射文件 )

<?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>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://127.0.0.1:3306/studentdb?characterEncoding=utf8" />
                <property name="username" value="root" />
                <property name="password" value="wsc" />
            </dataSource>
        </environment>
    </environments>
    <!--映射文件路径-->
    <mappers>
        <mapper resource="com/wsc/dao/StudentMapper.xml"></mapper>
        <!--        <mapper class="com/wsc/Mapper.xml"></mapper>-->
    </mappers>
</configuration>

 

2...StudentMapper.xml （配置：SQL语句）

<?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="Student">
    <!--    查询所有-->
    <select id="findAll" 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},null,#{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>

 

3...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>testmybatis</groupId>
    <artifactId>testmybatis04</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>
        <!--单元测试-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
        <!--mybatis的依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
         <!--日志资料-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>
</project>

 

4...test01

package com.wsc.testMybatis;

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

import java.io.InputStream;

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

/**
 * @version 1.0
 * @ClassName TestStudent
 * @Description TODO
 * @Author WSC
 * @Date 2019/6/29 17:01
 **/
public class TestStudent {
    public SqlSessionFactory sessionFactory=null;
    @Before
    public void init(){
        InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("SqlMapperConfig.xml");
        sessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
    }
    //查询方法
    @Test
    public void findAll(){
        StudentDao studentDao = new StudentDaoImpl(sessionFactory);
        List<Student> all = studentDao.findAll();
        for(Student list:all){
            System.out.println(list);
        }
    }
    /**
     * 通过id删除
     *
     */
    @Test
    public void drop(){
        StudentDao studentDao = new StudentDaoImpl(sessionFactory);
        studentDao.drop(6);

    };

    /**
     * 通过id 查询
     *
     */
    @Test
    public void selectId(){
        StudentDao studentDao = new StudentDaoImpl(sessionFactory);
        List<Student> students = studentDao.selectId(3);
        System.out.println(students);
    }

    /**
     * 通过对象 添加数据
     *
     */
    @Test
    public void add(){
        StudentDao studentDao = new StudentDaoImpl(sessionFactory);
        Student stu= new Student();

        stu.setStudentName("李国");
        stu.setAge(30);
//        Date date = new Date();
//        SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
//        String format = simpleDateFormat.format(date);

        stu.setClassNo(2);
        studentDao.add(stu);
    }

    /**
     * 模糊查询
     *
     */
    @Test
    public void selectByName(){
        StudentDao studentDao = new StudentDaoImpl(sessionFactory);
        List<Student> list = studentDao.selectByName("李");
        for(Student stu:list){
            System.out.println(stu);
        }
    }

    /**
     * 通过id 修改数据
     *
     */
    @Test
    public void change(){
        StudentDao studentDao = new StudentDaoImpl(sessionFactory);
        Student stu= new Student();
        stu.setStudentNo(19);
        stu.setStudentName("国21家");
        stu.setAge(23);
        Date date = new Date();
        stu.setBoreDate(date);
        stu.setClassNo(1);
        studentDao.change(stu);
    }
}

 

5...test02

package com.wsc.dao;

import entity.Student;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;

import java.io.InputStream;
import java.util.Date;
import java.util.List;

/**
 * @version 1.0
 * @ClassName StudentTest
 * @Description TODO
 * @Author WSC
 * @Date 2019/6/29 8:42
 **/
public class StudentTest {
    @Test
    public void test(){
        // 1...流   加载配置文件 SqlCfig
        InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("SqlCfig.xml");
      //工厂类 实现创建 工厂类实例对象
        SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
      //工厂类实例对象调 build 方法 创建
        SqlSessionFactory build = sqlSessionFactoryBuilder.build(resourceAsStream);
        SqlSession sqlSession = build.openSession();
        List<Object> objects = sqlSession.selectList("wsc.findAll");
        for(Object obj:objects){
            System.out.println(obj);
        }
        //关闭资源
        sqlSession.close();
    }
    //删除
    @Test
    public void drop(){
        // 1...流   加载配置文件 SqlCfig
        InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("SqlCfig.xml");
        //工厂类 实现创建 工厂类实例对象
        SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
        //工厂类实例对象调 build 方法 创建
        SqlSessionFactory build = sqlSessionFactoryBuilder.build(resourceAsStream);
        SqlSession sqlSession = build.openSession();

//        Student stu= new Student();
//        stu.setStudentNo(1);
        int delete = sqlSession.delete("wsc.drop",1);
        System.out.println(delete);
        sqlSession.commit();
//        List<Object> objects = sqlSession.selectList("wsc.findAll");
//        for(Object obj:objects){
//            System.out.println(obj);
//        }
        //关闭资源
        sqlSession.close();
    }
    //查询by id
    @Test
    public void selectById(){
        // 1...流   加载配置文件 SqlCfig
        //1 获取流对象
        InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("SqlCfig.xml");
        //工厂类 实现创建 工厂类实例对象
        // 2获得sqlSessionFactory对象
        SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
        //工厂类实例对象调 build 方法 创建

        SqlSessionFactory build = sqlSessionFactoryBuilder.build(resourceAsStream);
        // 3获得sqlSession对象
        SqlSession sqlSession = build.openSession();

        Student student= new Student();
         student.setStudentNo(2);
        Object o = sqlSession.selectOne("wsc.selectById", student);
        System.out.println(o);

//        List<Object> objects = sqlSession.selectList("wsc.findAll");
//        for(Object obj:objects){
//            System.out.println(obj);
//        }
        //关闭资源
        sqlSession.close();
    }
    //添加数据
    @Test
    public void addById(){
        // 1...流   加载配置文件 SqlCfig
        InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("SqlCfig.xml");
        //工厂类 实现创建 工厂类实例对象
        SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
        //工厂类实例对象调 build 方法 创建
        SqlSessionFactory build = sqlSessionFactoryBuilder.build(resourceAsStream);
        SqlSession sqlSession = build.openSession();

        Student stu= new Student();

        stu.setStudentName("李");
        stu.setAge(30);
//        Date date = new Date();
//        SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
//        String format = simpleDateFormat.format(date);

        stu.setClassNo(2);

        int insert = sqlSession.insert("wsc.add", stu);
        System.out.println(insert);
        //手动提交方式
        sqlSession.commit();
//        List<Object> objects = sqlSession.selectList("wsc.findAll");
//        for(Object obj:objects){
//            System.out.println(obj);
//        }
        //关闭资源
        sqlSession.close();
    }
    //通过姓名模糊查询
    @Test
    public void queryByName(){
        // 1...流   加载配置文件 SqlCfig
        InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("SqlCfig.xml");
        //工厂类 实现创建 工厂类实例对象
        SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
        //工厂类实例对象调 build 方法 创建
        SqlSessionFactory build = sqlSessionFactoryBuilder.build(resourceAsStream);
        SqlSession sqlSession = build.openSession();

//        Student student= new Student();
//        student.setStudentNo(2);
        List<Object> list = sqlSession.selectList("wsc.queryByName", "a");

        for(Object obj:list){
            System.out.println(obj);
        }

//        List<Object> objects = sqlSession.selectList("wsc.findAll");
//
        //关闭资源
        sqlSession.close();
    }
    //修改数据
    @Test
    public void change(){
        // 1...流   加载配置文件 SqlCfig
        InputStream resourceAsStream = this.getClass().getClassLoader().getResourceAsStream("SqlCfig.xml");
        //工厂类 实现创建 工厂类实例对象
        SqlSessionFactoryBuilder sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();
        //工厂类实例对象调 build 方法 创建
        SqlSessionFactory build = sqlSessionFactoryBuilder.build(resourceAsStream);
        SqlSession sqlSession = build.openSession();

        Student stu= new Student();
        stu.setStudentNo(3);
        stu.setStudentName("国30家");
        stu.setAge(20);
        Date date = new Date();
//        SimpleDateFormat simpleDateFormat = new SimpleDateFormat();
//        String format = simpleDateFormat.format(date);
        stu.setBoreDate(date);
        stu.setClassNo(1);

        sqlSession.update("wsc.change", stu);
//        System.out.println(insert);
        //手动提交方式
        sqlSession.commit();
//        List<Object> objects = sqlSession.selectList("wsc.findAll");
//        for(Object obj:objects){
//            System.out.println(obj);
//        }
        //关闭资源
        sqlSession.close();
    }
}