mybatis 批量保存demo

这是一个小白写的demo :注意Oracle 和Mysql 批量保存的方式不一样 这里Mysql 批量保存的方式对Oracle 不适用

项目结构：

数据库：Student表 需求就是批量加入学生信息：

数据库配置文件和基础配置文件：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mysql_demo
jdbc.username=root
jdbc.password=root

<?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>
    <properties resource="conf/jdbc.properties"/>
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <setting name="jdbcTypeForNull" value="NULL"/>
    </settings>
    <typeAliases>

        <package name="entity"/>
    </typeAliases>

    <environments default="mybatis-demo">
        <environment id="mybatis-demo">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>
    <databaseIdProvider type="DB_VENDOR">
        <property name="Oracle" value="oracle"/>
        <property name="MySQL" value="mysql"/>




    </databaseIdProvider>
<mappers>
    <package name="mapper"/>

</mappers>






</configuration>

学生实体类：

package entity;

import org.apache.ibatis.type.Alias;

@Alias("student")
public class Student {
    private Integer  sid;
    private String sName;
    private String Ssex;
    private  Teacher teacher;
    private Integer Sagenum;
    private Integer tid;
    public Student() {
    }

    public Student(Integer sid, String sName, String ssex, Integer sagenum, Integer tid) {
        this.sid = sid;
        this.sName = sName;
        Ssex = ssex;
        Sagenum = sagenum;
        this.tid = tid;
    }

    @Override

    public String toString() {
        return "Student{" +
                "sid=" + sid +
                ", sName='" + sName + '\'' +
                ", Ssex='" + Ssex + '\'' +
                ", teacher=" + teacher +
                ", Sagenum=" + Sagenum +
                ", tid=" + tid +
                '}';
    }



    public Student(Integer sid, String sName, String ssex, Teacher teacher, Integer sagenum, Integer tid) {
        this.sid = sid;
        this.sName = sName;
        Ssex = ssex;
        this.teacher = teacher;
        Sagenum = sagenum;
        this.tid = tid;
    }



    public Integer getSid() {
        return sid;
    }

    public void setSid(Integer sid) {
        this.sid = sid;
    }

    public String getsName() {
        return sName;
    }

    public void setsName(String sName) {
        this.sName = sName;
    }

    public String getSsex() {
        return Ssex;
    }

    public void setSsex(String ssex) {
        Ssex = ssex;
    }

    public Teacher getTeacher() {
        return teacher;
    }

    public void setTeacher(Teacher teacher) {
        this.teacher = teacher;
    }

    public Integer getSagenum() {
        return Sagenum;
    }

    public void setSagenum(Integer sagenum) {
        Sagenum = sagenum;
    }

    public Integer getTid() {
        return tid;
    }

    public void setTid(Integer tid) {
        this.tid = tid;
    }
}

mapper :

接口：

package mapper;

import entity.Student;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface StudentMapper {
    public  void addStu(@Param("Stul") List<Student> Stul) ;/*这里用@Param("Stul")给参数List<Student> Stul  起别名 方便后面调用*/


}

 对应的xml:

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


    <insert id="addStu">

        INSERT INTO sTUDENT (sID,SNAME,SSEX,SAGENUM,TID)
        VALUES
        <foreach collection="Stul" item="stu" separator=","><--解释下这里几个标签
foreach 是一个循环语句 作用是遍历集合 这里也就是遍历Stul item 配置的是循环中当前的元素 可以自定义 但是但是要与下面#{}中的元素（stu）一样 separator 是各个元素之间的分隔符-->

            (null,#{stu.sName},#{stu.Ssex},#{stu.Sagenum},#{stu.tid}) <--sid是自增主键 所以设为null-->

        </foreach>



    </insert>

</mapper>

测试类：

import entity.Student;
import mapper.StudentMapper;
import org.apache.ibatis.io.Resources;
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.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

public class Main {
    @Test
    public void add() throws Exception {
        SqlSessionFactory sqlSessionFactory = null;
        String resource = "conf/mybatis-config.xml";
        InputStream inputStream;
        SqlSession sqlSession=null;
        try {
            inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            sqlSession = sqlSessionFactory.openSession();
            StudentMapper studentMapper=sqlSession.getMapper(StudentMapper.class);
            List<Student> studentList=new ArrayList<>();
            studentList.add(new Student(null,"LI1","男",12,12));
            studentList.add(new Student(null,"LI2","男",12,12));

            studentList.add(new Student(null,"LI3","男",12,12));
            studentMapper.addStu(studentList);
            sqlSession.commit();//修改数据库的要提交


        } catch (IOException e) {


        } finally {
            sqlSession.close();
        }
    }
}

 数据库保存结果：