SpringBoot+Mybatis

创建数据库mybatis并创建表customer和student

创建SpringBoot工程






导入依赖

  
        
            mysql
            mysql-connector-java
            5.1.45
        
        
        
            com.baomidou
            mybatis-plus
            3.3.2
        
        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            1.3.2
        

在application.properties添加数据库连接和mapper扫描

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/mybatis?useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=x5

mybatis.mapper-locations=classpath:mapper/*.xml

创建Student和Customer实体类

package com.lijunbo.pojo;

public class Customer {
    private Integer id;
    private String username;
    private String jobs;
    private String phone;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getJobs() {
        return jobs;
    }

    public void setJobs(String jobs) {
        this.jobs = jobs;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }
    @Override
    public String toString() {
        return "Customer{" +
                "id=" + id +
                ", username='" + username + ''' +
                ", jobs='" + jobs + ''' +
                ", phone='" + phone + ''' +
                '}';
    }
}

package com.lijunbo.pojo;

public class Student {
    private Integer id;
    private String name;
    private String pwd;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + ''' +
                ", pwd='" + pwd + ''' +
                '}';
    }
}

创建CustomerDao和StudentDao层

package com.lijunbo.dao;

import com.lijunbo.pojo.Customer;

import java.util.List;

public interface CustomerDao {
    public List query(Customer customer);

    public void add(Customer customer);
}

package com.lijunbo.dao;

import com.lijunbo.pojo.Student;

import java.util.List;

public interface StudentDao {
    public List query();

    public void add(Student student);

}

在resources下创建mapper文件夹并在下面创建studentMapper.xml和customerMapper.xml文件

    
        select * from customer where 1=1
        
        
            and  username=#{username}
        
        
            and jobs=#{jobs}
        
    
    
        insert  into customer(username,jobs,phone) values (#{username},#{jobs},#{phone})
    

    
       select * from student
    
    
        insert  into student(name,pwd) values (#{name},#{pwd})
    

创建service层

package com.lijunbo.service;

import com.lijunbo.pojo.Customer;
import com.lijunbo.pojo.Student;

import java.util.List;

public interface CustomerService {
    public List query(Customer customer);
    public void add(Customer customer, Student student);
}

创建service的接口实现类

package com.lijunbo.service.impl;

import com.lijunbo.dao.CustomerDao;
import com.lijunbo.dao.StudentDao;
import com.lijunbo.pojo.Customer;
import com.lijunbo.pojo.Student;
import com.lijunbo.service.CustomerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class CustomerServiceImpl implements CustomerService {
    @Autowired
    CustomerDao customerDao;
    @Autowired
    StudentDao studentDao;

    public List query(Customer customer) {
        return customerDao.query(customer);
    }

    @Transactional
    public void add(Customer customer, Student student) {
        customerDao.add(customer);
        studentDao.add(student);
    }

}

创建Controller层

package com.lijunbo.controller;


import com.lijunbo.pojo.Customer;
import com.lijunbo.pojo.Student;
import com.lijunbo.service.CustomerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class CustomerController {
    @Autowired
    CustomerService service;

    @RequestMapping("/query")
    public List query(Customer customer){
        List list=service.query(customer);
        System.out.println(list);
        return list;
    }
    @RequestMapping("/add")
    public String add(Customer customer, Student student){
        service.add(customer,student);
        return "1";
    }
}

在SpringBoot自带的启动类上加@MapperScan(“xxxx.xxxx.xxx”)扫描mapper接口

package com.lijunbo;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

@MapperScan({"com.lijunbo.dao"})
public class SpringbootMybatisApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootMybatisApplication.class, args);
    }

}

启动后在浏览器中输入网址：http://localhost:8080/query,就可以输出你数据库中的数据