将数据添加到数据库中发生错误，如何解决？

Question

######将数据添加到数据库中发生错误
数据库如下：

相应代码如下：
mybatis-config.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>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/property_manage"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper class="property.manage.mapper.PropertyMapper"/>
    </mappers>
</configuration>

接口PropertyMapper.java

package property.manage.mapper;

import org.apache.ibatis.annotations.Insert;
import property.manage.entity.Household;

public interface PropertyMapper {

    @Insert("insert into household(name,sex,grade) values(#{name},#{sex},#{grade})")
    int addHousehold(Household household);
}

Household.java

package property.manage.entity;

import lombok.Data;

@Data
public class Household {
    String hid;
    final String name;
    final String sex;
    final int grade;
}

Main.java

package property.manage;

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 property.manage.entity.Household;
import property.manage.mapper.PropertyMapper;

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(Resources.getResourceAsReader("mybatis-config.xml"));
        try(SqlSession sqlSession = factory.openSession(true)){
            PropertyMapper mapper = sqlSession.getMapper(PropertyMapper.class);
            System.out.println(mapper.addHousehold(new Household("小敏","M",1)));
        }
    }
}

运行Main.java时报错：

不改变数据库结构，将（123456789，小敏，M,1）添加到数据库中
求详细代码解决方案

Answer 1

因为你插入的时候没有插入hid，而且你的hid非空

所以这里报错hid没有默认值
这样改

ALTER TABLE household MODIFY hid NOT NULL PRIMARY KEY AUTO_INCREMENT ;

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