spring boot 2整合mybatis

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency> <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>1.3.2</version>
</dependency> <dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>

mybatis.type-aliases-package = com.example.demo.entityspring.datasource.driverClassName = com.mysql.jdbc.Driver
spring.datasource.url = jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
spring.datasource.username = root
spring.datasource.password =

package com.example.demo.entity;import com.example.demo.enums.UserSexEnum;public class User {
public User() {
super();
} public User(String name, UserSexEnum sex) {
super();
this.name = name;
this.sex = sex;
} private Integer id; private String name; private UserSexEnum sex; 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 == null ? null : name.trim();
} public UserSexEnum getSex() {
return sex;
} public void setSex(UserSexEnum sex) {
this.sex = sex;
} @Override
public String toString() {
return "name " + this.name + ", sex " + this.sex;
}
}

package com.example.demo.enums;public enum UserSexEnum {
MAN,
WOMAN
}

package com.example.demo;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;@SpringBootApplication
@MapperScan("com.example.demo.mapper")
public class DemoApplication extends SpringBootServletInitializer { public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

package com.example.demo.mapper;import java.util.List;import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;import com.example.demo.entity.User;
import com.example.demo.enums.UserSexEnum;public interface UserMapper {
@Select("SELECT * FROM user")
//结果集，关联实体类属性和数据库字段一一对应，如果两边一致，就不需要这个属性来修饰。
@Results({
@Result(property = "sex", column = "sex", javaType = UserSexEnum.class),
})
List<User> getAll(); @Select("SELECT * FROM user WHERE id = #{id}")
@Results({
@Result(property = "sex", column = "sex", javaType = UserSexEnum.class),
})
User getOne(Long id); @Insert("INSERT INTO user(name,sex) VALUES(#{name}, #{sex})")
void insert(User user); @Update("UPDATE user SET name=#{name} WHERE id =#{id}")
void update(User user); @Delete("DELETE FROM user WHERE id =#{id}")
void delete(Long id);
}

package com.example.demo.mapper;import java.util.List;import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;import com.example.demo.entity.User;
import com.example.demo.enums.UserSexEnum;@RunWith(SpringRunner.class)
@SpringBootTest
public class UserMapperTest { @Autowired
private UserMapper UserMapper; @Test
public void testInsert() throws Exception {
UserMapper.insert(new User("aa", UserSexEnum.MAN));
UserMapper.insert(new User("bb", UserSexEnum.WOMAN));
UserMapper.insert(new User("cc", UserSexEnum.WOMAN)); Assert.assertEquals(3, UserMapper.getAll().size());
} @Test
public void testQuery() throws Exception {
List<User> users = UserMapper.getAll();
if(users==null || users.size()==0){
System.out.println("is null");
}else{
System.out.println(users.toString());
}
} @Test
public void testUpdate() throws Exception {
User user = UserMapper.getOne(6l);
System.out.println(user.toString());
user.setName("dd");
UserMapper.update(user);
Assert.assertTrue(("dd".equals(UserMapper.getOne(6l).getName())));
}}

package com.example.demo.web;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;@RestController
public class UserController {
@Autowired
private UserMapper userMapper; @RequestMapping("/getUsers")
public List<User> getUsers() {
List<User> users=userMapper.getAll();
return users;
} @RequestMapping("/getUser")
public User getUser(Long id) {
User user=userMapper.getOne(id);
return user;
} @RequestMapping("/add")
public void save(User user) {
userMapper.insert(user);
} @RequestMapping(value="update")
public void update(User user) {
userMapper.update(user);
} @RequestMapping(value="/delete/{id}")
public void delete(@PathVariable("id") Long id) {
userMapper.delete(id);
}
}

mybatis.config-location = classpath:mybatis/mybatis-config.xml
mybatis.mapper-locations = classpath:mybatis/mapper/*.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>
<settings>
<!-- 控制台打印查询语句 -->
<setting name="logImpl" value="STDOUT_LOGGING" />
</settings>
<typeAliases>
<typeAlias alias="Integer" type="java.lang.Integer" />
<typeAlias alias="Long" type="java.lang.Long" />
<typeAlias alias="HashMap" type="java.util.HashMap" />
<typeAlias alias="LinkedHashMap" type="java.util.LinkedHashMap" />
<typeAlias alias="ArrayList" type="java.util.ArrayList" />
<typeAlias alias="LinkedList" type="java.util.LinkedList" />
</typeAliases>
</configuration>

<?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="com.example.demo.mapper.UserMapper" >
<resultMap id="BaseResultMap" type="com.example.demo.entity.User" >
<id column="id" property="id" jdbcType="BIGINT" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="sex" property="sex" javaType="com.example.demo.enums.UserSexEnum"/>
</resultMap> <sql id="Base_Column_List" >
id, name, sex
</sql> <select id="getAll" resultMap="BaseResultMap" >
SELECT
<include refid="Base_Column_List" />
FROM user
</select> <select id="getOne" parameterType="java.lang.Long" resultMap="BaseResultMap" >
SELECT
<include refid="Base_Column_List" />
FROM user
WHERE id = #{id}
</select> <insert id="insert" parameterType="com.example.demo.entity.User" >
INSERT INTO
user
(name,sex)
VALUES
(#{name}, #{sex})
</insert> <update id="update" parameterType="com.example.demo.entity.User" >
UPDATE
user
SET
name = #{name}
WHERE
id = #{id}
</update> <delete id="delete" parameterType="java.lang.Long" >
DELETE FROM
user
WHERE
id =#{id}
</delete></mapper>

package com.example.demo.mapper;import java.util.List;import com.example.demo.entity.User;public interface UserMapper { List<User> getAll(); User getOne(Long id); void insert(User user); void update(User user); void delete(Long id);
}