springboot-mybatis-mysql

整体结构

pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.5.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>top.heliming.mybatis</groupId>
<artifactId>springboot-mybatis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-mybatis</name>
<description>Demo project for Spring Boot</description>

<properties>
<java.version>1.8</java.version>
<mybatis.version>1.3.2</mybatis.version>
<commons-lang3.version>3.4</commons-lang3.version>
<pagehelper.version>1.2.5</pagehelper.version>
<druid.version>1.1.9</druid.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<!--<scope>test</scope>-->
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<!-- 分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!-- alibaba的druid数据库连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>${druid.version}</version>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

application.yml

server:
port: 8080

spring:
datasource:
name: mysql_test
type: com.alibaba.druid.pool.DruidDataSource
#druid相关配置
druid:
#监控统计拦截的filters
filters: stat
driver-class-name: com.mysql.jdbc.Driver
#基本属性
url: jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true
username: manager
password: 123
#配置初始化大小/最小/最大
initial-size: 5
min-idle: 1
max-active: 20
#获取连接等待超时时间
max-wait: 60000
#间隔多久进行一次检测，检测需要关闭的空闲连接
time-between-eviction-runs-millis: 60000
#一个连接在池中最小生存的时间
min-evictable-idle-time-millis: 300000
validation-query: SELECT 'x'
test-while-idle: true
test-on-borrow: false
test-on-return: false
#打开PSCache，并指定每个连接上PSCache的大小。oracle设为true，mysql设为false。分库分表较多推荐设置为false
pool-prepared-statements: false
max-pool-prepared-statement-per-connection-size: 20

mybatis:
mapper-locations: classpath:mapper/*.xml
type-aliases-package: top.heliming.mybatis.springbootmybatis.pojo

#pagehelper
#如此配置就可使用分页功能,分页注意事项：
#
#在pageHelper.startpage方法后的第一条查询方法才会被分页
#
#带有for update 行锁的语句，不要使用分页插件，会抛异常
pagehelper:
helperDialect: mysql
reasonable: true
supportMethodsArguments: true
params: count=countSql
returnPageInfo: check

pojo

package top.heliming.mybatis.springbootmybatis.pojo;

/**
* 测试实体类
*/
public class User {
private Integer userId;
private String userName;
private String password;
private Long phone;

public Integer getUserId() {
return userId;
}

public void setUserId(Integer userId) {
this.userId = userId;
}

public String getUserName() {
return userName;
}

public void setUserName(String userName) {
this.userName = userName;
}

public String getPassword() {
return password;
}

public void setPassword(String password) {
this.password = password;
}

public Long getPhone() {
return phone;
}

public void setPhone(Long phone) {
this.phone = phone;
}

@Override
public String toString() {
return "User{" +
"userId=" + userId +
", userName='" + userName + '\'' +
", password='" + password + '\'' +
", phone=" + phone +
'}';
}
}

dao

package top.heliming.mybatis.springbootmybatis.dao;

import org.springframework.stereotype.Repository;
import top.heliming.mybatis.springbootmybatis.pojo.User;

import java.util.List;
@Repository
public interface UserDao {
int insert(User user);
List<User> selectUsers();
}

service

package top.heliming.mybatis.springbootmybatis.service;

import com.github.pagehelper.PageInfo;
import top.heliming.mybatis.springbootmybatis.pojo.User;

public interface UserService {
int addUser(User user);

PageInfo<User> findAllUser(int pageNum, int pageSize);
}

Impl

package top.heliming.mybatis.springbootmybatis.service.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import top.heliming.mybatis.springbootmybatis.dao.UserDao;
import top.heliming.mybatis.springbootmybatis.pojo.User;
import top.heliming.mybatis.springbootmybatis.service.UserService;

import java.util.List;

@Service(value = "userService")
public class UserServiceImpl implements UserService {

@Autowired
private UserDao userDao;

@Override
public int addUser(User user) {

return userDao.insert(user);
}

/*
* 这个方法中用到了我们开头配置依赖的分页插件pagehelper
* 很简单，只需要在service层传入参数，然后将参数传递给一个插件的一个静态方法即可；
* pageNum 开始页数
* pageSize 每页显示的数据条数
* */
@Override
public PageInfo<User> findAllUser(int pageNum, int pageSize) {
//将参数传给这个方法就可以实现物理分页了，非常简单。
PageHelper.startPage(pageNum, pageSize);
List<User> users = userDao.selectUsers();
PageInfo result = new PageInfo(users);
return result;
}
}

controller

package top.heliming.mybatis.springbootmybatis.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import top.heliming.mybatis.springbootmybatis.pojo.User;
import top.heliming.mybatis.springbootmybatis.service.UserService;

@RestController
@RequestMapping(value = "/user")
public class UserController {

@Autowired
private UserService userService;

@PostMapping("/add")
public int addUser(User user) {
return userService.addUser(user);
}

@GetMapping("/all")
public Object findAllUser(
@RequestParam(name = "pageNum", required = false, defaultValue = "1")
int pageNum,
@RequestParam(name = "pageSize", required = false, defaultValue = "10")
int pageSize) {
return userService.findAllUser(pageNum, pageSize);
}
}

UserMapper.xml

<?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="top.heliming.mybatis.springbootmybatis.dao.UserDao" >
<sql id="BASE_TABLE">
t_user
</sql>

<sql id="BASE_COLUMN">
userId,userName,password,phone
</sql>

<insert id="insert" parameterType="top.heliming.mybatis.springbootmybatis.pojo.User">
INSERT INTO
<include refid="BASE_TABLE"/>
<trim prefix="(" suffix=")" suffixOverrides=",">
userName,password,
<if test="phone != null">
phone,
</if>
</trim>
<trim prefix="VALUES(" suffix=")" suffixOverrides=",">
#{userName, jdbcType=VARCHAR},#{password, jdbcType=VARCHAR},
<if test="phone != null">
#{phone, jdbcType=VARCHAR},
</if>
</trim>
</insert>

<select id="selectUsers" resultType="top.heliming.mybatis.springbootmybatis.pojo.User">
SELECT
<include refid="BASE_COLUMN"/>
FROM
<include refid="BASE_TABLE"/>
</select>
</mapper>

SpringbootMybatisApplicationTests

package top.heliming.mybatis.springbootmybatis;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootMybatisApplicationTests {

@Test
public void contextLoads() {
}

}

UserControllerTest

package top.heliming.mybatis.springbootmybatis.controller;

import com.github.pagehelper.PageInfo;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import top.heliming.mybatis.springbootmybatis.SpringbootMybatisApplicationTests;
import top.heliming.mybatis.springbootmybatis.dao.UserDao;
import top.heliming.mybatis.springbootmybatis.pojo.User;
import top.heliming.mybatis.springbootmybatis.service.UserService;

import static org.junit.Assert.*;

public class UserControllerTest extends SpringbootMybatisApplicationTests {
@Autowired
private UserService userService;

@Autowired
private UserDao userDao;

@Test
public void addUser() {
User user = new User();
user.setUserName("小红");
user.setPassword("000000");
user.setPhone(13490234321L);
int insert = userDao.insert(user);
assertEquals(insert,1);
user.setUserName("小明");
user.setPassword("000000");
user.setPhone(13490234320L);
insert = userDao.insert(user);
assertEquals(insert,1);
}

@Test
public void findAllUser(){
PageInfo<User> pageInfo =  userService.findAllUser(0, 5);
System.out.println(pageInfo);
assertNotNull(pageInfo);
}

}

test.sql

/*
Navicat Premium Data Transfer

Source Server         : manager
Source Server Type    : MySQL
Source Server Version : 50726
Source Host           : localhost:3306
Source Schema         : test

Target Server Type    : MySQL
Target Server Version : 50726
File Encoding         : 65001

Date: 15/07/2019 00:44:56
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for t_user
-- ----------------------------
DROP TABLE IF EXISTS `t_user`;
CREATE TABLE `t_user` (
`userId` int(11) NOT NULL AUTO_INCREMENT,
`userName` varchar(255) DEFAULT '',
`password` varchar(255) DEFAULT '',
`phone` bigint(11) DEFAULT '0',
PRIMARY KEY (`userId`)
) ENGINE=InnoDB AUTO_INCREMENT=1007 DEFAULT CHARSET=utf8mb4;

-- ----------------------------
-- Records of t_user
-- ----------------------------
BEGIN;
INSERT INTO `t_user` VALUES (1005, '小红', '000000', 13490234321);
INSERT INTO `t_user` VALUES (1006, '小明', '000000', 13490234320);
COMMIT;

SET FOREIGN_KEY_CHECKS = 1;