Mybatis逆向工程

1、针对以下数据表

Id	name	addr	age	job	sal
1	张三	江苏省南京市	35	区域总监	20000
2	李四	江苏省苏州市	32	销售经理	15000
3	王五	四川省成都市	26	销售员	8000
4	赵六	吉林省长春市	27	财务	10000
5	刘七	吉林省吉林市	24	销售员	6000
6	吴八	陕西省西安市	31	销售员	7000

使用mybatis逆向工程，生成对应的model和mapper处理

2、调用逆向工程API向其中插入数据

Id	name	addr	age	job	sal
7	张丽	江苏省南京市	32	销售员	7000
8	张伟	江苏省苏州市	26	职员	5000
9	王晓	上海市	30	区域总监	20000
10	赵敏	上海市	25	财务	10000

3、调用逆向工程API及分页插件，使用查询江苏省员工信息，每3条数据一页

4、调用逆向工程API将所有27岁以上的销售员，工资加1000元

5、调用逆向工程API将陕西省员工删除

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <classPathEntry location="C:\JavaHome\m2\mysql\mysql-connector-java\8.0.26\mysql-connector-java-8.0.26.jar" />

    <context id="mysqlTables" targetRuntime="MyBatis3">
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf8&amp;useUnicode=true&amp;serverTimezone=GMT%2B8&amp;useSSL=false"
                        userId="root"
                        password="zengyu1234">
        </jdbcConnection>

        <javaTypeResolver >
            <property name="forceBigDecimals" value="false" />

        </javaTypeResolver>

        <javaModelGenerator targetPackage="com.xzit.model" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <sqlMapGenerator targetPackage="com.xzit.mapper"  targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.xzit.mapper"  targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <table tableName="teacher"></table>
    </context>
</generatorConfiguration>

package com.xzit.test;

import com.xzit.mapper.TeacherMapper;
import com.xzit.model.Teacher;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;

public class TestInsertTeacher {
    public static void main(String[] args) throws IOException {
        SqlSession session = new SqlSessionFactoryBuilder().build(
                Resources.getResourceAsStream("SqlMapConfig.xml")).openSession();
        TeacherMapper mapper=session.getMapper(TeacherMapper.class);
        mapper.insert(new Teacher(0,"张丽","江苏省南京市",32,"销售员",7000));
        mapper.insert(new Teacher(0,"张伟","江苏省苏州市",26,"职员",5000));
        mapper.insert(new Teacher(0,"王晓","上海市",30,"区域总监",20000));
        mapper.insert(new Teacher(0,"赵敏","上海市",25,"财务",10000));
        session.commit();
        session.close();
    }
}

package com.xzit.test;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.xzit.mapper.TeacherMapper;
import com.xzit.model.Teacher;
import com.xzit.model.TeacherExample;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.util.List;

/*3、调用逆向工程API及分页插件，使用查询江苏省员工信息，每3条数据一页*/
public class TestSelect {
    public static void main(String[] args) throws IOException {
        SqlSession session = new SqlSessionFactoryBuilder().build(
                Resources.getResourceAsStream("SqlMapConfig.xml")).openSession();
        TeacherMapper mapper=session.getMapper(TeacherMapper.class);
        //使用分页查询插件，从第1页开始，每页显示2个
        PageHelper.startPage(2,2);
        TeacherExample example = new TeacherExample();
        example.createCriteria().andAddrLike("%江苏省%");
        List<Teacher> list = mapper.selectByExample(example);
        //将list封装到分页查询对象中
        PageInfo<Teacher> page = new PageInfo<>(list);
        //使用list接收查询结果
        List<Teacher> teachers = page.getList();
        teachers.forEach(System.out::println);
        session.close();
    }
}

package com.xzit.test;

import com.xzit.mapper.TeacherMapper;
import com.xzit.model.Teacher;
import com.xzit.model.TeacherExample;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.util.List;

/*4、调用逆向工程API将所有27岁以上的销售员，工资加1000元*/
public class TestUpdate {
    public static void main(String[] args) throws IOException {
        SqlSession session = new SqlSessionFactoryBuilder().build(
                Resources.getResourceAsStream("SqlMapConfig.xml")).openSession();
        TeacherMapper mapper=session.getMapper(TeacherMapper.class);
        //创建查询对象，先查询出27岁以上的员工
        TeacherExample example = new TeacherExample();
        example.createCriteria().andAgeGreaterThan(27);
        //将超过27岁的员工存进list
        List<Teacher> list = mapper.selectByExample(example);
        //使用for遍历符合条件的每一位员工
        for (Teacher teacherlist:list){
            //将该员工的工资加1000，对象封装成teacherlist
            teacherlist.setSal(teacherlist.getSal()+1000);
            //创建一个对象2
            TeacherExample example2 = new TeacherExample();
            //设置查询条件是该员工的id，查到数据库的这个员工
            example2.createCriteria().andIdEqualTo(teacherlist.getId());
            //使用teacherlist更新这个员工的信息
            mapper.updateByExampleSelective(teacherlist,example2);
            //提交事务
            session.commit();
        }
        session.close();
    }
}

package com.xzit.test;

import com.xzit.mapper.TeacherMapper;
import com.xzit.model.TeacherExample;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;

/*5、调用逆向工程API将陕西省员工删除*/
public class TestDelete {
    public static void main(String[] args) throws IOException {
        SqlSession session = new SqlSessionFactoryBuilder().build(
                Resources.getResourceAsStream("SqlMapConfig.xml")).openSession();
        TeacherMapper mapper=session.getMapper(TeacherMapper.class);
        TeacherExample example = new TeacherExample();
        example.createCriteria().andAddrLike("%陕西省%");
        mapper.deleteByExample(example);
        session.commit();
        session.close();
    }
}