目录
一、基础工程
1、创建一个数据库:mp
2、添加数据
3、创建初始工程
4、添加依赖
二、Mybatis + Mybatis-Plus
1、创建子工程:mybatis-plus-simple
2、在子工程下添加配置
2.1Mybatis实现查询User
2.1.1、编写User实体对象
2.1.2、编写UserMapper接口
2.1.3、编写UserMapper.xml文件
2.1.4、编写TestMybatis测试
2.2Mybatis+MP实现查询User
2.2.1、将UserMapper继承BaseMapper,将拥有了BaseMapper中的所有方法
2.2.2、使用MP中的MybatisSqlSessionFactoryBuilder进程构建
三、Spring + Mybatis + Mybatis-Plus
1、创建子Module
2、添加pom文件
3、编写jdbc.properties
4、编写applicationContext.xml
5、编写User对象以及UserMapper接口
6、编写测试类
四、SpringBoot + Mybatis + Mybatis-Plus
1、创建一个工springboot程
2、添加依赖
3、添加日志文件及配置
4、编写pojo
5、编写mapper
6、编写测试类
create database if not exists mp;
-- 创建测试表
CREATE TABLE `tb_user` (
`id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键ID',
`user_name` varchar(20) NOT NULL COMMENT '用户名',
`password` varchar(20) NOT NULL COMMENT '密码',
`name` varchar(30) DEFAULT NULL COMMENT '姓名',
`age` int(11) DEFAULT NULL COMMENT '年龄',
`email` varchar(50) DEFAULT NULL COMMENT '邮箱',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
-- 插入测试数据
INSERT INTO `tb_user` (`id`, `user_name`, `password`, `name`, `age`, `email`) VALUES
('1', 'zhangsan', '123456', '张三', '18', '[email protected]');
INSERT INTO `tb_user` (`id`, `user_name`, `password`, `name`, `age`, `email`) VALUES
('2', 'lisi', '123456', '李四', '20', '[email protected]');
INSERT INTO `tb_user` (`id`, `user_name`, `password`, `name`, `age`, `email`) VALUES
('3', 'wangwu', '123456', '王五', '28', '[email protected]');
INSERT INTO `tb_user` (`id`, `user_name`, `password`, `name`, `age`, `email`) VALUES
('4', 'zhaoliu', '123456', '赵六', '21', '[email protected]');
INSERT INTO `tb_user` (`id`, `user_name`, `password`, `name`, `age`, `email`) VALUES
('5', 'sunqi', '123456', '孙七', '24', '[email protected]');
com.baomidou
mybatis-plus
3.1.1
mysql
mysql-connector-java
5.1.47
com.alibaba
druid
1.0.11
org.projectlombok
lombok
true
1.18.4
junit
junit
4.12
org.slf4j
slf4j-log4j12
1.6.4
org.apache.maven.plugins
maven-compiler-plugin
1.8
1.8
日之文件:log4j.properties
log4j.rootLogger=DEBUG,A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=[%t] [%c]-[%p] %m%n
mybatis-config.xml文件:
package com.mp.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
private Long id;
private String userName;
private String password;
private String name;
private Integer age;
private String email;
}
public interface UserMapper {
List findAll();
}
public class TestMybatis {
@Test
public void testUserList() throws Exception{
//读取配置文件
String resource = "mybatis-config.xml";
//加载资源文件。
InputStream inputStream = Resources.getResourceAsStream(resource);
//创建 sqlSessionFactory 工厂
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
//创建 SqlSession 对象
SqlSession sqlSession = sqlSessionFactory.openSession();
//获取一个 UserMapper 的实例
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
//调用方法
List list = userMapper.findAll();
for (User user : list) {
System.out.println(user);
}
}
}
public interface UserMapper extends BaseMapper {
List findAll();
}
public class TestMybatisPlus {
@Test
public void testUserList() throws Exception{
//读取配置文件
String resource = "mybatis-config.xml";
//加载资源文件。
InputStream inputStream = Resources.getResourceAsStream(resource);
//这里使用的是mybatisplus中的MybatisSqlSessionFactoryBuilder
SqlSessionFactory sqlSessionFactory = new MybatisSqlSessionFactoryBuilder().build(inputStream);
//创建 SqlSession 对象
SqlSession sqlSession = sqlSessionFactory.openSession();
//获取一个 UserMapper 的实例
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
// 可以调用BaseMapper中定义的方法
List list = userMapper.selectList(null);
for (User user : list) {
System.out.println(user);
}
}
}
8
8
5.1.6.RELEASE
org.springframework
spring-webmvc
${spring.version}
org.springframework
spring-jdbc
${spring.version}
org.springframework
spring-test
${spring.version}
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/mp?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true&useSSL=false
jdbc.username=root
jdbc.password=root
@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("tb_user")
public class User {
private Long id;
private String userName;
private String password;
private String name;
private Integer age;
private String email;
}
public interface UserMapper extends BaseMapper {
}
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class TestSpringMP {
@Autowired
private UserMapper userMapper;
@Test
public void testSelectList(){
List users = this.userMapper.selectList(null);
for (User user : users) {
System.out.println(user);
}
}
}
在teat下测试可能会读取不到 applicationContext.xml文件,复制一份放在teat目录下即可
org.springframework.boot
spring-boot-starter
com.mysql
mysql-connector-j
runtime
org.projectlombok
lombok
true
org.springframework.boot
spring-boot-starter-test
test
com.baomidou
mybatis-plus-boot-starter
3.1.1
org.slf4j
slf4j-log4j12
log4j.properties:
log4j.rootLogger=DEBUG,A1
log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=[%t] [%c]-[%p] %m%n
编写application.properties文件:
spring.application.name = itcast-mp-springboot
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/mp?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("tb_user")
public class User {
private Long id;
private String userName;
private String password;
private String name;
private Integer age;
private String email;
}
public interface UserMapper extends BaseMapper {
}
@Autowired
private UserMapper userMapper;
@Test
public void testSelect() {
List userList = userMapper.selectList(null);
for (User user : userList) {
System.out.println(user);
}
}