Spring Boot，Maven，Mybatis，Mysql整合
1、在本地创建一个MYSQL数据库，用户为test,登录用户名为root，密码root
先看下eclipse项目中各文件所在位置
其中有部分内容没有用到，比如MemberWithBLOBs.java，这个是利用工具对应表生成的实体类文件，此处没有用到，忽略。
同时，不再记录如果创建一个MAVEN项目，只将用到的配置进行贴入
2、pom.xml文件的配置
4.0.0
com.cl.sql
sqltest
0.0.1-SNAPSHOT
org.springframework.boot
spring-boot-starter-parent
2.0.0.RELEASE
org.springframework.boot
spring-boot-starter-web
org.mybatis
mybatis
3.5.0
com.alibaba
druid-spring-boot-starter
1.1.9
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.2.0
org.springframework.boot
spring-boot-starter-test
test
mysql
mysql-connector-java
5.1.45
org.mybatis.generator
mybatis-generator-core
1.3.5
tk.mybatis
mapper
3.3.0
org.mybatis.generator
mybatis-generator-maven-plugin
1.3.2
true
true
mysql
mysql-connector-java
${mysql.version}
2、application.properties的配置
# application.properties
############################### 数据库配置 ###############################
#// 数据库名字
spring.datasource.name=test
#// 数据源url， 通过url可以关联数据库
spring.datasource.url=jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8
#// 数据库用户名和密码
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
#// 数据库驱动
spring.datasource.driverClassName=com.mysql.jdbc.Driver
#
############################## mybatis配置 ###############################
#全局映射器启用缓存
mybatis.configuration.cache-enabled=true
#查询时,关闭关联对象及时加载以提高性能
mybatis.configuration.lazy-loading-enabled=false
#按需加载字段(加载字段由SQL指定),不会加载关联表的所有字段,以提高性能
mybatis.configuration.aggressive-lazy-loading=false
#允许返回不同的结果集以达到通用的效果
mybatis.configuration.multiple-result-sets-enabled=true
#对于批量更新操作缓存SQL以提高性能
mybatis.configuration.default-executor-type=REUSE
#数据库执行超时时间
mybatis.configuration.default-statement-timeout=25000
3、启动项
package com.cl.sqltest;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
@SpringBootApplication()
@MapperScan("com.cl.sqltest.*.mapper")
public class MySqlApplication {
public static void main(String[] args){
SpringApplication.run(MySqlApplication.class, args);
}
}
4、Member实体
package com.cl.sqltest.entities.entity;
public class Member {
private Integer memberId;
private String memberName;
private String memberTruename;
private Boolean memberSex;
private String memberBirthday;
private String memberPasswd;
public Integer getMemberId() {
return memberId;
}
public void setMemberId(Integer memberId) {
this.memberId = memberId;
}
public String getMemberName() {
return memberName;
}
public void setMemberName(String memberName) {
this.memberName = memberName == null ? null : memberName.trim();
}
public String getMemberTruename() {
return memberTruename;
}
public void setMemberTruename(String memberTruename) {
this.memberTruename = memberTruename == null ? null : memberTruename.trim();
}
public Boolean getMemberSex() {
return memberSex;
}
public void setMemberSex(Boolean memberSex) {
this.memberSex = memberSex;
}
public String getMemberBirthday() {
return memberBirthday;
}
public void setMemberBirthday(String memberBirthday) {
this.memberBirthday = memberBirthday == null ? null : memberBirthday.trim();
}
public String getMemberPasswd() {
return memberPasswd;
}
public void setMemberPasswd(String memberPasswd) {
this.memberPasswd = memberPasswd == null ? null : memberPasswd.trim();
}
}5、MemberExtendMapper.java接口
package com.cl.sqltest.entities.mapper;
import com.cl.sqltest.entities.entity.Member;
public interface MemberExtendMapper {
int selectCount();
Member getByMemberId(int memberId);
}
6、MemberExtendMapper.xml具体的SQL语句
7、MemberResource.java接口
package com.cl.sqltest.resources;
import com.cl.sqltest.entities.entity.Member;
public interface MemberResource {
public Member getMember(int memberId);
}
8、MemberResourceImp.java接口实现类，控制项
package com.cl.sqltest.resources;
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.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.cl.sqltest.entities.entity.Member;
import com.cl.sqltest.services.MemberService;
@RestController
@RequestMapping(value="/mysqltest")
public class MemberResourceImp implements MemberResource {
@Autowired
MemberService memberService;
public MemberResourceImp(MemberService memberService){
this.memberService = memberService;
}
@Override
@RequestMapping(value="/get/member/{memberId}",method= RequestMethod.GET)
public Member getMember(@PathVariable int memberId) {
Member member = memberService.getMember(memberId);
return member;
}
}
9、具体的实现类MemberService.java
package com.cl.sqltest.services;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.cl.sqltest.entities.entity.Member;
import com.cl.sqltest.entities.mapper.MemberExtendMapper;
@Service
public class MemberService{
private MemberExtendMapper memberExtendMapper;
@Autowired
public MemberService(MemberExtendMapper memberExtendMapper){
this.memberExtendMapper = memberExtendMapper;
}
public Member getMember(int memberId) {
int count = memberExtendMapper.selectCount();
Member member = memberExtendMapper.getByMemberId(memberId);
System.out.println(count);
return member;
}
}
10、项目启动，通过postman或者浏览器调用，可返回结果
