在Springboot大行其道的时代，任何关于框架的集成都少不了Springboot。
一、创建maven工程并导入相应的包
4.0.0
com.qiu
mybatisplus-springboot
0.0.1-SNAPSHOT
org.springframework.boot
spring-boot-starter-parent
2.0.0.RELEASE
UTF-8
UTF-8
1.8
log4j
log4j
1.2.17
com.alibaba
fastjson
1.2.49
org.springframework.boot
spring-boot-starter-jdbc
org.springframework.boot
spring-boot-starter
org.springframework.boot
spring-boot-starter-thymeleaf
org.springframework.boot
spring-boot-starter-web
mysql
mysql-connector-java
runtime
org.springframework.boot
spring-boot-devtools
runtime
org.springframework.boot
spring-boot-starter-test
test
com.baomidou
mybatis-plus
2.3
com.baomidou
mybatisplus-spring-boot-starter
1.0.5
org.apache.velocity
velocity
1.7
com.alibaba
druid
1.0.28
二、通过mybatis-plus代码生成器生成相应的代码
- 这里参考spring集成mybatis-plus这篇博客有关代码生成器部分
- 这里需要注意的是需要在Mapper接口上加上注解@Mapper，Springboot才可以扫描的到。
@Mapper
public interface UserMapper extends BaseMapper {
}
三、代码生成器中生成的UserService和实现类
- UserService
public interface UserService extends IService {
}
- UserServiceImpl
//由于这里继承ServiceImpl，而这个类导入了UserMapper，因此无需再导入Mapper就可以开发了
@Service
public class UserServiceImpl extends ServiceImpl
implements UserService {
}
四、UserController
@RestController
@RequestMapping("/user")
public class UserController {
//注入UserService 接口
@Autowired
private UserService userService;
@RequestMapping("/getAllUsers")
public String getAllUsers() {
//获取全部列表
List selectList = userService.selectList(null);
return JSON.toJSONString(selectList);
}
@RequestMapping("/delete/{id}")
public String deleteUserById(@PathVariable(name="id")Integer id) {
//根据id删除
boolean deleteById = userService.deleteById(id);
return deleteById==true?"删除成功":"删除失败";
}
}
五、Springboot相关配置
- druid数据源配置
@Configuration
public class DruidDataSourceConfig {
private Logger logger = LoggerFactory.getLogger(DruidDataSourceConfig.class);
@Value("${spring.datasource.url}")
private String dbUrl;
@Value("${spring.datasource.username}")
private String username;
@Value("${spring.datasource.password}")
private String password;
@Value("${spring.datasource.driverClassName}")
private String driverClassName;
@Value("${spring.datasource.initialSize}")
private int initialSize;
@Value("${spring.datasource.minIdle}")
private int minIdle;
@Value("${spring.datasource.maxActive}")
private int maxActive;
@Value("${spring.datasource.maxWait}")
private int maxWait;
@Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
private int timeBetweenEvictionRunsMillis;
@Value("${spring.datasource.minEvictableIdleTimeMillis}")
private int minEvictableIdleTimeMillis;
@Value("${spring.datasource.validationQuery}")
private String validationQuery;
@Value("${spring.datasource.testWhileIdle}")
private boolean testWhileIdle;
@Value("${spring.datasource.testOnBorrow}")
private boolean testOnBorrow;
@Value("${spring.datasource.testOnReturn}")
private boolean testOnReturn;
@Value("${spring.datasource.poolPreparedStatements}")
private boolean poolPreparedStatements;
@Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")
private int maxPoolPreparedStatementPerConnectionSize;
@Value("${spring.datasource.filters}")
private String filters;
@Value("{spring.datasource.connectionProperties}")
private String connectionProperties;
@Bean //声明其为Bean实例
@Primary //在同样的DataSource中，首先使用被标注的DataSource
public DataSource dataSource() {
DruidDataSource datasource = new DruidDataSource();
datasource.setUrl(this.dbUrl);
datasource.setUsername(username);
datasource.setPassword(password);
datasource.setDriverClassName(driverClassName);
//configuration
datasource.setInitialSize(initialSize);
datasource.setMinIdle(minIdle);
datasource.setMaxActive(maxActive);
datasource.setMaxWait(maxWait);
datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
datasource.setValidationQuery(validationQuery);
datasource.setTestWhileIdle(testWhileIdle);
datasource.setTestOnBorrow(testOnBorrow);
datasource.setTestOnReturn(testOnReturn);
datasource.setPoolPreparedStatements(poolPreparedStatements);
datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);
try {
datasource.setFilters(filters);
} catch (SQLException e) {
logger.error("druid configuration initialization filter : {0}", e);
}
datasource.setConnectionProperties(connectionProperties);
return datasource;
}
}
- mybatis-plus相关配置（分页插件和性能优化）
@Configuration
public class MybatisPlusConfig {
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor page = new PaginationInterceptor();
page.setDialectType("mysql");
return page;
}
/***
* plus 的性能优化
* @return
*/
@Bean
public PerformanceInterceptor performanceInterceptor() {
PerformanceInterceptor performanceInterceptor = new PerformanceInterceptor();
/**/
performanceInterceptor.setMaxTime(1000);
/**/
performanceInterceptor.setFormat(true);
return performanceInterceptor;
}
}
- application.properties(Springboot配置文件）```
server.port=8082
# jdbc_config
# 驱动配置信息
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url = jdbc:mysql://127.0.0.1:3306/mybatis
spring.datasource.username = root
spring.datasource.password = 123456
spring.datasource.driverClassName = com.mysql.jdbc.Driver
# 连接池的配置信息
# 初始化大小，最小，最大
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.maxWait=60000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 打开PSCache，并且指定每个连接上PSCache的大小
spring.datasource.poolPreparedStatements=true
spring.datasource.maxPoolPreparedStatementPerConnectionSize=20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
spring.datasource.filters=stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
spring.datasource.connectionProperties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
#mybatisplus
#配置文件位置
#mybatis-plus.config-location=
#mapper文件文职
mybatis-plus.mapper-locations=classpath:mapper/*.xml
#设置别名的包名
mybatis-plus.type-aliases-package=com.、qiu.entity
##主键类型 0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID";
mybatis-plus.global-config.id-type=0
##字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断"
mybatis-plus.global-config.field-strategy=0
# #驼峰下划线转换
mybatis-plus.global-config.db-column-underline=true
#刷新mapper 调试神器
mybatis-plus.global-config.refresh-mapper=true
#数据库大写下划线转换
#mybatis-plus.global-config.capital-mode=true
#序列接口实现类配置
#mybatis-plus.global-config.key-generator=com.baomidou.springboot.xxx
#逻辑删除配置（下面3个配置）
mybatis-plus.global-config.logic-delete-value=0
mybatis-plus.global-config.logic-not-delete-value=1
#自定义SQL注入器
3mybatis-plus.global-config.sql-injector=com.baomidou.mybatisplus.mapper.LogicSqlInjector
mybatis-plus.configuration.map-underscore-to-camel-case=true
mybatis-plus.configuration.cache-enabled=false
六、Springboot启动类
@SpringBootApplication
public class MybatisPlusApplication {
public static void main(String[] args) {
SpringApplication.run(MybatisPlusApplication.class, args);
}
}