Connected to the target VM, address: '127.0.0.1:52612', transport: 'socket'

<?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="goods">
<!--namespace有点类似于Java中的package-->
    <select id="selectAll" resultType="com.imooc.mybatis.entity.Goods">
<!-- id相当于select语句的别名  -->
        select * from t_goods order by goods_id desc limit 10
    </select>
    <select id="selectById" parameterType="Integer" resultType="com.imooc.mybatis.entity.Goods">
        select * from babytun.t_goods where goods_id=#{value}
    </select>
    <insert id="insert" parameterType="com.imooc.mybatis.entity.Goods">
        INSERT INTO t_goods(title,sub_title,original_cost,current_price,discount,is_free_delivery,category_id)
        VALUES (#{title},#{sub_title},#{original_cost},#{current_price},#{discount},#{is_free_delivery},#{category_id})
    </insert>
</mapper>

• Still throw exception...

package com.imooc.mybatis.entity;
public class Goods {
    private Integer goodsId;           //商品编号
    private String title;              //标题
    private String subTitle;           //子标题
    private Float originalCost;        //原始价格
    private Float currentPrice;        //当前价格
    private Float discount;            //
    private Integer isFreeDelivery;    //是否包邮，1-包邮 0-不包邮
    private Integer categoryId;        //分类编号
    public Integer getGoodsId() {
        return goodsId;
    }
    public void setGoodsId(Integer goodsId) {
        this.goodsId = goodsId;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public String getSubTitle() {
        return subTitle;
    }
    public void setSubTitle(String subTitle) {
        this.subTitle = subTitle;
    }
    public Float getOriginalCost() {
        return originalCost;
    }
    public void setOriginalCost(Float originalCost) {
        this.originalCost = originalCost;
    }
    public Float getCurrentPrice() {
        return currentPrice;
    }
    public void setCurrentPrice(Float currentPrice) {
        this.currentPrice = currentPrice;
    }
    public Float getDiscount() {
        return discount;
    }
    public void setDiscount(Float discount) {
        this.discount = discount;
    }
    public Integer getIsFreeDelivery() {
        return isFreeDelivery;
    }
    public void setIsFreeDelivery(Integer isFreeDelivery) {
        this.isFreeDelivery = isFreeDelivery;
    }
    public Integer getCategoryId() {
        return categoryId;
    }
    public void setCategoryId(Integer categoryId) {
        this.categoryId = categoryId;
    }
}

package com.imooc.mybatis;
import com.imooc.mybatis.entity.Goods;
import com.imooc.mybatis.utils.MyBatisUtils;
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.Reader;
import java.sql.Connection;
import java.util.List;
public class MyBatisTestor {
//    public void testMyBatiosUtils() throws Exception {
//        SqlSession sqlSession = null;
//        try {
//            sqlSession = MyBatisUtils.openSession();
//            Connection conn = sqlSession.getConnection();
//            System.out.println(conn);
//
//        }catch (Exception e){
//            throw e;
//        }finally {
//            MyBatisUtils.closeSession(sqlSession);
//        }
//
//
//    }
//@Test
//    public void testSqlSessionFactory() throws IOException {
//        //利用Reader加载classpath下的mybatis-config.xml核心配置文件
//        Reader reader = Resources.getResourceAsReader("mybatis-config.xml");
//        //初始化SqlSession对象，同时解析mybatis-config.xml文件
//        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
//        //对mybatis进行了初始化操作
//        System.out.println("SessionFactory Loading successful");
//        SqlSession sqlSession = null;
//        try {
//            //创建SqlSession对象,SqlSession是JDBC扩展类，用于与数据库交互
//            sqlSession = sqlSessionFactory.openSession();
//            //创建数据库连接（测试用）这个语句非必须，正常开发时mybatis会自动帮我们完成
//            Connection conn = sqlSession.getConnection();
//            System.out.println(conn);
//        }catch (Exception e){
//            e.printStackTrace();
//        }finally {
//            if(sqlSession != null){
//                sqlSession.close();
//            }
//        }
//    }
//    @Test
// public void testSelectAll(){
//     SqlSession session=null;
//     session = MyBatisUtils.openSession();
//     List<Goods> list= session.selectList("goods.selectAll");
//     for(Goods goods:list){
//         System.out.println(goods.getTitle());
//     }
// }
// public void testSelectById() throws Exception {
//     SqlSession session = null;
//     try {
//         session = MyBatisUtils.openSession();
//         Goods goods = session.selectOne("goods.selectById", 1603);
//         System.out.println(goods.getTitle());
//     }catch (Exception e){
//         throw e;
//     }finally {
//         MyBatisUtils.closeSession(session);
//     }
//     }
     @Test
     public void insertTest()throws Exception{
         SqlSession session = null;
         try {
             session = MyBatisUtils.openSession();
             Goods goods = new Goods();
             goods.setTitle("test");
             goods.setSubTitle("1234");
             goods.setOriginalCost(2000f);
             goods.setCurrentPrice(1000f);
             goods.setDiscount(0.5f);
             goods.setIsFreeDelivery(1);
             goods.setCategoryId(43);
             int num = session.insert("goods.insert",goods);
             System.out.println(num);
             session.commit();
             System.out.println(goods.getGoodsId());
         }catch (Exception e){
             if(session!=null){
                 session.rollback();
             }
             throw e;
         }finally {
             MyBatisUtils.closeSession(session);
         }
     }
}

There is no getter for property named 'sub_title' in 'class com.imooc.mybatis.entity.Goods'

"C:\Program Files\Java\jdk1.8.0_162\bin\java.exe" -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2021.3.2\lib\idea_rt.jar=53603:C:\Program Files\JetBrains\IntelliJ IDEA 2021.3.2\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\JetBrains\IntelliJ IDEA 2021.3.2\lib\idea_rt.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2021.3.2\plugins\junit\lib\junit5-rt.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2021.3.2\plugins\junit\lib\junit-rt.jar;C:\Program 

org.apache.ibatis.exceptions.PersistenceException: 

### Error updating database.  Cause: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'sub_title' in 'class com.imooc.mybatis.entity.Goods'

### The error may exist in mappers/goods.xml

### The error may involve goods.insert-Inline

### The error occurred while setting parameters

### SQL: INSERT INTO t_goods(title,sub_title,original_cost,current_price,discount,is_free_delivery,category_id)         VALUES (?,?,?,?,?,?,?)

### Cause: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'sub_title' in 'class com.imooc.mybatis.entity.Goods'

Process finished with exit code -1