此 demo 演示了 Spring Boot 如何集成通用Mapper插件和分页助手插件，简化Mybatis开发，带给你难以置信的开发体验。
<?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>
<artifactId>spring-boot-demo-orm-mybatis-mapper-page</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-boot-demo-orm-mybatis-mapper-page</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>com.xkcoding</groupId>
<artifactId>spring-boot-demo</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<mybatis.mapper.version>2.0.4</mybatis.mapper.version>
<mybatis.pagehelper.version>1.2.9</mybatis.pagehelper.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- 通用Mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>${mybatis.mapper.version}</version>
</dependency>
<!-- 分页助手 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>${mybatis.pagehelper.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
<build>
<finalName>spring-boot-demo-orm-mybatis-mapper-page</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>/**
* <p>
* 启动器
* </p>
*
* @package: com.xkcoding.orm.mybatis.MapperAndPage
* @description: 启动器
* @author: yangkai.shen
* @date: Created in 2018/11/8 13:43
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
@SpringBootApplication
@MapperScan(basePackages = {"com.xkcoding.orm.mybatis.MapperAndPage.mapper"}) // 注意：这里的 MapperScan 是 tk.mybatis.spring.annotation.MapperScan 这个包下的
public class SpringBootDemoOrmMybatisMapperPageApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootDemoOrmMybatisMapperPageApplication.class, args);
}
}spring:
datasource:
url: jdbc:mysql://127.0.0.1:3306/spring-boot-demo?useUnicode=true&characterEncoding=UTF-8&useSSL=false&autoReconnect=true&failOverReadOnly=false&serverTimezone=GMT%2B8
username: root
password: root
driver-class-name: com.mysql.cj.jdbc.Driver
type: com.zaxxer.hikari.HikariDataSource
initialization-mode: always
continue-on-error: true
schema:
- "classpath:db/schema.sql"
data:
- "classpath:db/data.sql"
hikari:
minimum-idle: 5
connection-test-query: SELECT 1 FROM DUAL
maximum-pool-size: 20
auto-commit: true
idle-timeout: 30000
pool-name: SpringBootDemoHikariCP
max-lifetime: 60000
connection-timeout: 30000
logging:
level:
com.xkcoding: debug
com.xkcoding.orm.mybatis.MapperAndPage.mapper: trace
mybatis:
configuration:
# 下划线转驼峰
map-underscore-to-camel-case: true
mapper-locations: classpath:mappers/*.xml
type-aliases-package: com.xkcoding.orm.mybatis.MapperAndPage.entity
mapper:
mappers:
- tk.mybatis.mapper.common.Mapper
not-empty: true
style: camelhump
wrap-keyword: "`{0}`"
safe-delete: true
safe-update: true
identity: MYSQL
pagehelper:
auto-dialect: true
helper-dialect: mysql
reasonable: true
params: count=countSql/**
* <p>
* UserMapper
* </p>
*
* @package: com.xkcoding.orm.mybatis.MapperAndPage.mapper
* @description: UserMapper
* @author: yangkai.shen
* @date: Created in 2018/11/8 14:15
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
@Component
// 注意：这里的Mapper是tk.mybatis.mapper.common.Mapper包下的
public interface UserMapper extends Mapper<User>, MySqlMapper<User> {
}/**
* <p>
* UserMapper 测试
* </p>
*
* @package: com.xkcoding.orm.mybatis.MapperAndPage.mapper
* @description: UserMapper 测试
* @author: yangkai.shen
* @date: Created in 2018/11/8 14:25
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
@Slf4j
public class UserMapperTest extends SpringBootDemoOrmMybatisMapperPageApplicationTests {
@Autowired
private UserMapper userMapper;
/**
* 测试通用Mapper - 保存
*/
@Test
public void testInsert() {
String salt = IdUtil.fastSimpleUUID();
User testSave3 = User.builder().name("testSave3").password(SecureUtil.md5("123456" + salt)).salt(salt).email("[email protected]").phoneNumber("17300000003").status(1).lastLoginTime(new DateTime()).createTime(new DateTime()).lastUpdateTime(new DateTime()).build();
userMapper.insertUseGeneratedKeys(testSave3);
Assert.assertNotNull(testSave3.getId());
log.debug("【测试主键回写#testSave3.getId()】= {}", testSave3.getId());
}
/**
* 测试通用Mapper - 批量保存
*/
@Test
public void testInsertList() {
List<User> userList = Lists.newArrayList();
for (int i = 4; i < 14; i++) {
String salt = IdUtil.fastSimpleUUID();
User user = User.builder().name("testSave" + i).password(SecureUtil.md5("123456" + salt)).salt(salt).email("testSave" + i + "@xkcoding.com").phoneNumber("1730000000" + i).status(1).lastLoginTime(new DateTime()).createTime(new DateTime()).lastUpdateTime(new DateTime()).build();
userList.add(user);
}
int i = userMapper.insertList(userList);
Assert.assertEquals(userList.size(), i);
List<Long> ids = userList.stream().map(User::getId).collect(Collectors.toList());
log.debug("【测试主键回写#userList.ids】= {}", ids);
}
/**
* 测试通用Mapper - 删除
*/
@Test
public void testDelete() {
Long primaryKey = 1L;
int i = userMapper.deleteByPrimaryKey(primaryKey);
Assert.assertEquals(1, i);
User user = userMapper.selectByPrimaryKey(primaryKey);
Assert.assertNull(user);
}
/**
* 测试通用Mapper - 更新
*/
@Test
public void testUpdate() {
Long primaryKey = 1L;
User user = userMapper.selectByPrimaryKey(primaryKey);
user.setName("通用Mapper名字更新");
int i = userMapper.updateByPrimaryKeySelective(user);
Assert.assertEquals(1, i);
User update = userMapper.selectByPrimaryKey(primaryKey);
Assert.assertNotNull(update);
Assert.assertEquals("通用Mapper名字更新", update.getName());
log.debug("【update】= {}", update);
}
/**
* 测试通用Mapper - 查询单个
*/
@Test
public void testQueryOne(){
User user = userMapper.selectByPrimaryKey(1L);
Assert.assertNotNull(user);
log.debug("【user】= {}", user);
}
/**
* 测试通用Mapper - 查询全部
*/
@Test
public void testQueryAll() {
List<User> users = userMapper.selectAll();
Assert.assertTrue(CollUtil.isNotEmpty(users));
log.debug("【users】= {}", users);
}
/**
* 测试分页助手 - 分页排序查询
*/
@Test
public void testQueryByPageAndSort() {
initData();
int currentPage = 1;
int pageSize = 5;
String orderBy = "id desc";
int count = userMapper.selectCount(null);
PageHelper.startPage(currentPage, pageSize, orderBy);
List<User> users = userMapper.selectAll();
PageInfo<User> userPageInfo = new PageInfo<>(users);
Assert.assertEquals(5, userPageInfo.getSize());
Assert.assertEquals(count, userPageInfo.getTotal());
log.debug("【userPageInfo】= {}", userPageInfo);
}
/**
* 测试通用Mapper - 条件查询
*/
@Test
public void testQueryByCondition() {
initData();
Example example = new Example(User.class);
// 过滤
example.createCriteria().andLike("name", "%Save1%").orEqualTo("phoneNumber", "17300000001");
// 排序
example.setOrderByClause("id desc");
int count = userMapper.selectCountByExample(example);
// 分页
PageHelper.startPage(1, 3);
// 查询
List<User> userList = userMapper.selectByExample(example);
PageInfo<User> userPageInfo = new PageInfo<>(userList);
Assert.assertEquals(3, userPageInfo.getSize());
Assert.assertEquals(count, userPageInfo.getTotal());
log.debug("【userPageInfo】= {}", userPageInfo);
}
/**
* 初始化数据
*/
private void initData() {
testInsertList();
}
}