SpringBoot整合Mybatis【非注解形式开发】

• 开发环境
• 整合步骤
• 一个开发DEMO

开发环境

SpringBoot+Maven+Mybatis+Mysql

整合步骤

1.pom.xml文件中引入依赖：

<!-- 整合Mybatis -->

<!-- 引入starter -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
<scope>runtime</scope>
</dependency>

<!-- Mybatis的JDBC驱动包 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>

<!-- 引入第三方数据源 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.6</version>
</dependency>

2.application.properties文件中添加配置信息：

#可以自动识别
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root

spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

3.src/main/resources目录下新建一个Folder->mybatis文件夹，
mybatis目录下新建一个mybatis配置信息文件->mybatis-config.xml

mybatis-config.xml中的配置信息如下：

<?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>
<!-- 这里写配置内容 -->
<settings>
<!-- 配置关闭缓存 -->
<setting name="cacheEnabled" value="false" />
<!-- 配置开启自动驼峰命名法 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>
<!-- 是否自动生成主键 -->
<setting name="useGeneratedKeys" value="false"/>
<!-- 配置默认的执行器。SIMPLE 就是普通的执行器；REUSE 执行器会重用预处理语句（prepared statements）； BATCH 执行器将重用语句并执行批量更新。  -->
<setting name="defaultExecutorType" value="REUSE"/>
<!-- 事务超时时间 -->
<setting name="defaultStatementTimeout" value="600"/>
</settings>

<typeAliases>
<!-- 配置类别名 -->
<typeAlias type="com.springboot20.xdclass.springboot.demo2.domain.Customer" alias="customer" />
</typeAliases>

<mappers>
<!-- 配置映射文件 -->
<mapper resource="mapper/customer.xml" />
</mappers>

</configuration>

4.application.properties文件中添加配置信息：

mybatis.config-location=classpath:/mybatis/mybatis-config.xml

加载mybatis-config.xml配置文件

一个开发DEMO

实现一个客户信息表的增、删、改、查：
1.src/main/java下面新建
domain包存放客户实体类Customer.java
controller包存放客户控制类CustomerController.java
service包存放客户服务接口(interface)类CustomerService.java
service.impl包存放服务实现类CustomerServiceImpl.java
mapper包存放持久层(interface)接口类CustomerMapper.java

2.各类中具体代码如下：
Customer.java:

package com.springboot20.xdclass.springboot.demo2.domain;

import java.io.Serializable;
import java.util.Date;

/**
* 功能描述：Customer 客户   domain 实体类
* @author linxifengbao
*
*/
public class Customer implements Serializable{

private static final long serialVersionUID = 1L;

private Integer id;//主键ID
private String  code;//编码
private String name;//姓名
private Date regTime;//注册时间
private Date updateTime;//更新时间

public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Date getRegTime() {
return regTime;
}
public void setRegTime(Date regTime) {
this.regTime = regTime;
}
public Date getUpdateTime() {
return updateTime;
}
public void setUpdateTime(Date updateTime) {
this.updateTime = updateTime;
}

}

CustomerController.java:
注意点：加

@RestController

类注解

package com.springboot20.xdclass.springboot.demo2.controller;

import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.springboot20.xdclass.springboot.demo2.domain.Customer;
import com.springboot20.xdclass.springboot.demo2.domain.JsonData;
import com.springboot20.xdclass.springboot.demo2.service.CustomerService;

/**
* 功能描述：Customer 客户 Controller 控制类
* @author linxifengbao
*
*/
@RestController
public class CustomerController {

@Autowired
private CustomerService customerService;//注入Service

/**
* 功能描述：添加客户
* postman接口测试：
* http://localhost:8080/api/addCustomer
* Headers设置Content-Type:application/json
* Body传入Json格式对象数据：
* {
*     "name":"张三",
*     "code":"zhangsan",
*     "regTime":null,
*     "updateTime":null
* }
* @param customer
* @return
*/

@RequestMapping(value="/api/addCustomer")
public Object addCustomer(@RequestBody Customer customer){
customer.setRegTime(new Date());
customer.setUpdateTime(new Date());
int id = customerService.addCustomer(customer);
return id;
}

/**
* 功能描述：根据ID获取客户信息
* postman接口测试：
* http://localhost:8080/api/selectCustomerById/13
* @param id
* @return
*/
@RequestMapping(value="/api/selectCustomerById/{id}")
public Object selectCustomerById(@PathVariable int id){
Customer customer = customerService.selectCustomerById(id);
return customer;
}

/**
* 功能描述：修改客户信息
* postman接口测试：
* http://localhost:8080/api/updateCustomer
* Headers设置Content-Type:application/json
* Body传入Json格式对象数据：
* {
*    "id": 13,
*    "code": "zhangsan修改",
*    "name": "张三修改",
*    "regTime":null,
*    "updateTime":null
* }
* @param updateCustomer
* @return
*/
@RequestMapping(value="/api/updateCustomer")
public Object updateCustomer(@RequestBody Customer updateCustomer){
int id = updateCustomer.getId();
//获取客户信息用于前端数据回显
Customer customer = customerService.selectCustomerById(id);
//修改客户信息
customerService.updateCustomer(updateCustomer);
return null;
}

/**
* 功能描述：根据id删除客户信息
* postman接口测试：
* http://localhost:8080/api/deleteCustomerById?id=13
* @param id
* @return
*/
@RequestMapping(value="/api/deleteCustomerById")
public Object deleteCustomerById(int id){
customerService.deleteCustomerById(id);
return null;
}

}

CustomerService.java

package com.springboot20.xdclass.springboot.demo2.service;

import com.springboot20.xdclass.springboot.demo2.domain.Customer;

/**
* 功能描述：Customer 客户 Service 接口类
* @author linxifengbao
*
*/
public interface CustomerService {

/**
* 功能描述：添加客户
* @param customer
*/
public int addCustomer(Customer customer);

/**
* 功能描述：根据ID获取客户信息
* @param id
* @return
*/
public Customer selectCustomerById(int id);

/**
* 功能描述：修改客户信息
* @param updateCustomer
*/
public void updateCustomer(Customer updateCustomer);

/**
* 功能描述：根据ID删除客户信息
* @param id
*/
public void deleteCustomerById(int id);
}

CustomerServiceImpl.java
注意点：加

@Service

类注解(是在service接口实现类中加类注解)

package com.springboot20.xdclass.springboot.demo2.service.impl;

import java.util.Date;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.springboot20.xdclass.springboot.demo2.domain.Customer;
import com.springboot20.xdclass.springboot.demo2.mapper.CustomerMapper;
import com.springboot20.xdclass.springboot.demo2.service.CustomerService;

/**
* 功能描述：Customer 客户 Service 接口实现类
* @author linxifengbao
*
*/
@Service
public class CustomerServiceImpl implements CustomerService{

@Autowired
private CustomerMapper customerMapper;//注入Mapper

/**
* 功能描述：添加客户
*/
@Override
public int addCustomer(Customer customer) {
customerMapper.insertCustomer(customer);
int id = customer.getId();
return id;
}

/**
* 功能描述：根据ID获取客户信息
*/
@Override
public Customer selectCustomerById(int id) {
Customer customer = customerMapper.selectCustomerById(id);
return customer;
}

/**
* 功能描述：修改客户信息
*/
@Override
public void updateCustomer(Customer updateCustomer) {
updateCustomer.setUpdateTime(new Date());
customerMapper.updateCustomer(updateCustomer);
}

/**
* 功能描述：根据Id删除客户信息
*/
@Override
public void deleteCustomerById(int id) {
customerMapper.deleteCustomerById(id);
}

}

CustomerMapper.java
注意点：加

@Mapper

类注解

package com.springboot20.xdclass.springboot.demo2.mapper;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Options;

import com.springboot20.xdclass.springboot.demo2.domain.Customer;

/**
* 功能描述：Customer 客户 Dao层   Mapper 接口类
* @author linxifengbao
*
*/
@Mapper
public interface CustomerMapper {

/**
* 功能描述：添加客户,添加后返回客户的ID,客户ID为自增
* 在mapper.xml的insert sql语句中添加：
* useGeneratedKeys="true" keyProperty="id"
* keyProperty="数据库中的主键字段名对应的实体类字段名" ；【填实体类字段名】
*/

//@Options(useGeneratedKeys=true,keyProperty="id",keyColumn="id")
public int insertCustomer(Customer customer);

/**
* 功能描述：根据ID获取客户信息
* @param id
* @return
*/
public Customer selectCustomerById(int id);

/**
* 功能描述：修改客户信息
* @param updateCustomer
*/
public int updateCustomer(Customer updateCustomer);

/**
* 功能描述：根据ID删除客户信息
* @param id
*/
public int deleteCustomerById(int id);

}

3.src/main/resources下新建mapper文件夹
mapper文件夹下存放customer.xml
该xml文件的加载是在mapper-config.xml文件中配置的

customer.xml中代码如下：
注意点：

<mapper namespace="">

<?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.springboot20.xdclass.springboot.demo2.mapper.CustomerMapper">

<insert id="insertCustomer" useGeneratedKeys="true" keyProperty="id">
insert into t_customer(
name,
code,
reg_time,
update_time
)
value(
#{name},
#{code},
#{regTime},
#{updateTime}
)

</insert>

<select id="selectCustomerById" resultType="customer" parameterType="int">
select * from t_customer
where id = #{id}
</select>

<update id="updateCustomer">
update t_customer
<set>
<if test="name != null and name != ''">
name = #{name},
</if>
<if test="code != null and code != ''">
code = #{code},
</if>
<if test="regTime != null">
reg_time = #{regTime},
</if>
<if test="updateTime != null">
update_time = #{updateTime},
</if>
</set>
where id = #{id}
</update>

<delete id="deleteCustomerById">
delete from t_customer
where id = #{id}
</delete>

</mapper>

4.运行，结合postman进行接口测试

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