目錄
3、配置DruidConfig關聯yml的配置文件spring.datasource
2）創建mybatis/mapper/EmployeeMapper.xml
3)創建mybatis/mybatis-config.xml
4) 在application.yml文件中配置mybatis文件的位置
1、配置pom.xml
<?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>2.1.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.mi</groupId>
<artifactId>spring-boot-mybatis</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring-boot-mybatis</name>
<description>spring-boot-mybatis project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</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-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.0.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<!--引入自定義數據源-->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.18</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
2、配置application.yml
spring:
datasource:
username: root
password: root
url: jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
# 配置監控統計攔截的filters，去掉後監控界面sql無法統計，'wall'用於防火牆
filters: stat,wall,log4j
maxPoolPreparedStatementPerConnectionSize: 20
useGlobalDataSourceStat: true
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
schema:
- classpath:sql/department.sql
- classpath:sql/employee.sql
3、配置DruidConfig關聯yml的配置文件spring.datasource
package com.mi.config;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/**
* Created by chengwen on 2019/7/3.
*/
@Configuration
public class DruidConfig {
@Bean
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource druid(){
return new DruidDataSource();
}
//配置Druid的監控
//1、配置一個管理後臺的servlet
@Bean
public ServletRegistrationBean statViewServlet(){
ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
Map<String,String> initParms = new HashMap<>();
initParms.put("loginUsername","admin");
initParms.put("loginPassword","123456");
initParms.put("allow",""); //默認是允許所有訪問
initParms.put("deny","192.168.15.21"); //不允許訪問
bean.setInitParameters(initParms);
return bean;
}
//2、配置一個監控的filter
@Bean
public FilterRegistrationBean webStatFilter(){
FilterRegistrationBean bean = new FilterRegistrationBean();
bean.setFilter(new WebStatFilter());
Map<String,String> initParms = new HashMap<>();
initParms.put("exclusions","*.js,*.css,/druid/*");
bean.setInitParameters(initParms);
bean.setUrlPatterns(Arrays.asList("/*"));
return bean;
}
}
4、創建數據庫及數據庫表結構
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for department
-- ----------------------------
DROP TABLE IF EXISTS `department`;
CREATE TABLE `department` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`departmentName` varchar(255) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for employee
-- ----------------------------
DROP TABLE IF EXISTS `employee`;
CREATE TABLE `employee` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`lastName` varchar(255) DEFAULT NULL,
`email` varchar(255) DEFAULT NULL,
`gender` int(2) DEFAULT NULL,
`d_id` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
5、創建對應的實體類
1）Department
package com.mi.bean;
/**
* Created by chengwen on 2019/7/3.
*/
public class Department {
private Integer id;
private String departmentName;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getDepartmentName() {
return departmentName;
}
public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}
}
2）Employee
package com.mi.bean;
/**
* Created by chengwen on 2019/7/3.
*/
public class Employee {
private Integer id;
private String lastName;
private Integer gender;
private String email;
private Integer dId;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getGender() {
return gender;
}
public void setGender(Integer gender) {
this.gender = gender;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Integer getdId() {
return dId;
}
public void setdId(Integer dId) {
this.dId = dId;
}
}
6、創建對應的Mapper
1)創建DepartmentMapper
package com.mi.mapper;
import com.mi.bean.Department;
import org.apache.ibatis.annotations.*;
/**
* Created by chengwen on 2019/7/3.
*/
//指定這是一個操作數據庫的Mapper
@Mapper
public interface DepartmentMapper {
@Select("select * from department where id=#{id}")
public Department getDeptById(Integer id);
@Delete("delete from department where id=#{id}")
public int deleteDeptById(Integer id);
//@Options註解用於獲取自增主鍵返回給前端@Options(useGeneratedKeys = true,keyProperty = "id")
@Options(useGeneratedKeys = true,keyProperty = "id")
@Insert("insert into department(departmentName) values (#{departmentName})")
public int insertDept(Department department);
@Update("update department set departmentName=#{departmentName} where id=#{id}")
public int updateDept(Department department);
}
7、創建DeptController
package com.mi.controller;
import com.mi.bean.Department;
import com.mi.mapper.DepartmentMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
/**
* Created by chengwen on 2019/7/3.
*/
@RestController
public class DeptController {
@Autowired
DepartmentMapper departmentMapper;
@GetMapping("dept/{id}")
public Department getDepartment(@PathVariable("id") Integer id){
return departmentMapper.getDeptById(id);
}
@GetMapping("dept")
public Department insertDept(Department department){
departmentMapper.insertDept(department);
return department;
}
}
8、瀏覽器訪問
1）新增測試：
http://localhost:8080/dept?departmentName=CC
返回結果
{"id":3,"departmentName":"CC"}
2）查詢測試：
http://localhost:8080/dept/1
返回結果
{"id":1,"departmentName":"AA"}
9、解決駝峯命名問題
可以使實體類的駝峯命名與數據庫的下劃線映射成功。
1）使用配置類的方式
package com.mi.config;
import org.apache.ibatis.session.Configuration;
import org.mybatis.spring.boot.autoconfigure.ConfigurationCustomizer;
import org.springframework.context.annotation.Bean;
/**
* Created by chengwen on 2019/7/3.
*/
@org.springframework.context.annotation.Configuration
public class MyBatisConfig {
@Bean
public ConfigurationCustomizer configurationCustomizer(){
return new ConfigurationCustomizer() {
@Override
public void customize(Configuration configuration){
configuration.setMapUnderscoreToCamelCase(true);
}
};
}
}
2）使用配置文件的方式
在application.yml文件中添加配置
# 解決駝峯命名問題
mybatis:
configuration:
map-underscore-to-camel-case: true
10、省寫@Mapper 註解，統一配置在啓動入口
使用@MapperScan(value = "com.mi.mapper")掃描所有Mapper文件
package com.mi;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan(value = "com.mi.mapper")
@SpringBootApplication
public class SpringBootMybatisApplication {
public static void main(String[] args) {
SpringApplication.run(SpringBootMybatisApplication.class, args);
}
}
11、配置文件的方式整合Mybatis
1）創建EmployeeMapper類
package com.mi.mapper;
import com.mi.bean.Employee;
import org.apache.ibatis.annotations.Mapper;
/**
* Created by chengwen on 2019/7/3.
*/
//@Mapper或者mapperScan將接口掃描到容器中
public interface EmployeeMapper {
public Employee getEmpById(Integer id);
public void insertEmp(Employee employee);
}
2）創建mybatis/mapper/EmployeeMapper.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="com.mi.mapper.EmployeeMapper">
<select id="getEmpById" resultType="com.mi.bean.Employee">
SELECT * FROM employee WHERE id=#{id}
</select>
<insert id="insertEmp">
INSERT INTO employee(lastName,email,gender,d_id) VALUES (#{lastName},#{email},#{gender},#{did})
</insert>
</mapper>
3)創建mybatis/mybatis-config.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>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
</configuration>
4) 在application.yml文件中配置mybatis文件的位置
spring:
datasource:
username: root
password: root
url: jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource
initialSize: 5
minIdle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
# 配置監控統計攔截的filters，去掉後監控界面sql無法統計，'wall'用於防火牆
filters: stat,wall,log4j
maxPoolPreparedStatementPerConnectionSize: 20
useGlobalDataSourceStat: true
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
#schema:
# - classpath:sql/department.sql
# - classpath:sql/employee.sql
# 解決駝峯命名問題
mybatis:
#configuration:
# map-underscore-to-camel-case: true
#配置文件的方式整合mybatis
config-location: classpath:/mybatis/mybatis-config.xml
mapper-locations: classpath:/mybatis/mapper/*.xml
5）創建EmpController類
package com.mi.controller;
import com.mi.bean.Employee;
import com.mi.mapper.EmployeeMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
/**
* Created by chengwen on 2019/7/3.
*/
@RestController
public class EmpController {
@Autowired
EmployeeMapper employeeMapper;
@GetMapping("emp/{id}")
public Employee getEmp(@PathVariable("id") Integer id){
return employeeMapper.getEmpById(id);
}
}
6）測試配置版springboot整合mybatis
http://localhost:8080/emp/1
測試結果
{"id":1,"lastName":"zhangsan","gender":1,"email":"[email protected]","dId":1}