SpringCloud(第 044 篇)链接Mysql数据库简单的集成Mybatis框架采用MapperXml访问数据库
一、大致介绍
1、前面章节讲解的是在方法上面添加sql语句操作,虽然说仅仅只是一种简单的操作,在测试期间可以多试试;
2、但是对于复杂的操作,那种简单也仅仅只是简单的自己用用而已,复杂的还是得采用xml配置;
3、因此本章节就试试采用Mybatis框架通过mapperxml进行对数据的操作;
二、实现步骤
2.1 添加 maven 引用包
4.0.0
springms-provider-user-mysql-mybatis-mapper
1.0-SNAPSHOT
jar
com.springms.cloud
springms-spring-cloud
1.0-SNAPSHOT
org.springframework.boot
spring-boot-starter-data-jpa
org.springframework.boot
spring-boot-starter-web
mysql
mysql-connector-java
org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.1
2.2 添加应用配置文件(springms-provider-user-mysql-mybatis-mapper\src\main\resources\application.yml)
server:
port: 8330
spring:
application:
name: springms-provider-user-mysql-mybatis-mapper #全部小写
#####################################################################################################
# mysql 属性配置
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://ip:3306/hmilyylimh
username: username
password: password
# jpa:
# hibernate:
# #ddl-auto: create #ddl-auto:设为create表示每次都重新建表
# ddl-auto: update #ddl-auto:设为update表示每次都不会重新建表
# show-sql: true
#####################################################################################################
#####################################################################################################
# mybatis mapper xml 配置
mybatis:
# mybatis.type-aliases-package:指定domain类的基包,即指定其在*Mapper.xml文件中可以使用简名来代替全类名(看后边的UserMapper.xml介绍)
type-aliases-package:
mapper-locations: classpath:mybatis/mapper/*.xml
config-location: classpath:mybatis/mybatis-config.xml
#####################################################################################################
#####################################################################################################
# 打印日志
logging:
level:
root: INFO
org.hibernate: INFO
org.hibernate.type.descriptor.sql.BasicBinder: TRACE
org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
com.springms: DEBUG
#####################################################################################################
2.3 添加mybatis配置文件(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/entity/User.java)
2.4 添加用户mapperxml映射文件(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/entity/User.java)
2.5 添加实体用户类User(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/entity/User.java)
package com.springms.cloud.entity;
public class User {
private Long id;
private String username;
private String name;
private Integer age;
private String balance;
public Long getId() {
return this.id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return this.age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getBalance() {
return this.balance;
}
public void setBalance(String balance) {
this.balance = balance;
}
}
2.6 添加用户mapper接口(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/mapper/IUserMapper.java)
package com.springms.cloud.mapper;
import com.springms.cloud.entity.User;
import org.apache.ibatis.annotations.Mapper;
import java.util.List;
/**
* 用户 mybatis 接口文件。
*
* @author hmilyylimh
*
* @version 0.0.1
*
* @date 2017-10-19
*
*/
public interface IUserMapper {
User findUserById(Long id);
List findAllUsers();
int insertUser(User user);
}
2.7 添加用户DAO接口类(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/dao/IUserDao.java)
package com.springms.cloud.dao;
import com.springms.cloud.entity.User;
import java.util.List;
/**
* 简单用户链接Mysql数据库微服务(通过@Repository注解标注该类为持久化操作对象)。
*
* @author hmilyylimh
*
* @version 0.0.1
*
* @date 2017-10-19
*
*/
public interface IUserDao {
User findUserById(Long id);
List findAllUsers();
int insertUser(User user);
}
2.8 添加用户DAO接口类实现类(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/dao/impl/UserDaoImpl.java)
package com.springms.cloud.dao.impl;
import com.springms.cloud.dao.IUserDao;
import com.springms.cloud.entity.User;
import com.springms.cloud.mapper.IUserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.util.List;
/**
* 简单用户链接Mysql数据库微服务(通过@Repository注解标注该类为持久化操作对象)。
*
* @author hmilyylimh
*
* @version 0.0.1
*
* @date 2017-10-19
*
*/
@Repository
public class UserDaoImpl implements IUserDao {
@Autowired
private IUserMapper iUserMapper;
@Override
public User findUserById(Long id) {
return iUserMapper.findUserById(id);
}
@Override
public List findAllUsers() {
return iUserMapper.findAllUsers();
}
@Override
public int insertUser(User user) {
return iUserMapper.insertUser(user);
}
}
2.9 添加用户Service接口类(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/service/IUserService.java)
package com.springms.cloud.service;
import com.springms.cloud.entity.User;
import java.util.List;
/**
* 简单用户链接Mysql数据库微服务(通过@Service注解标注该类为持久化操作对象)。
*
* @author hmilyylimh
*
* @version 0.0.1
*
* @date 2017-10-19
*
*/
public interface IUserService {
User findUserById(Long id);
List findAllUsers();
int insertUser(User user);
}
2.10 添加用户Service接口实现类(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/service/impl/UserServiceImpl.java)
package com.springms.cloud.service.impl;
import com.springms.cloud.dao.IUserDao;
import com.springms.cloud.entity.User;
import com.springms.cloud.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* 简单用户链接Mysql数据库微服务(通过@Service注解标注该类为持久化操作对象)。
*
* @author hmilyylimh
*
* @version 0.0.1
*
* @date 2017-10-19
*
*/
@Service
public class UserServiceImpl implements IUserService {
@Autowired
IUserDao iUserDao;
@Override
public User findUserById(Long id) {
return iUserDao.findUserById(id);
}
@Override
public List findAllUsers() {
return iUserDao.findAllUsers();
}
@Override
public int insertUser(User user) {
return iUserDao.insertUser(user);
}
}
2.11 添加用户Web访问层Controller(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/controller/ProviderUserMysqlMybatisMapperController.java)
package com.springms.cloud.controller;
import com.springms.cloud.entity.User;
import com.springms.cloud.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
/**
* 用户微服务Controller。
*
* @author hmilyylimh
*
* @version 0.0.1
*
* @date 2017-10-19
*
*/
@RestController
public class ProviderUserMysqlMybatisMapperController {
@Autowired
private IUserService iUserService;
@GetMapping("/simple/{id}")
public User findUserById(@PathVariable Long id) {
return this.iUserService.findUserById(id);
}
@GetMapping("/simple/list")
public List findUserList() {
return this.iUserService.findAllUsers();
}
/**
* 添加一个student,使用postMapping接收post请求
*
* http://localhost:8330/simple/addUser?username=user11&age=11&balance=11
*
* @return
*/
@PostMapping("/simple/addUser")
public User addUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){
User user=new User();
user.setUsername(username);
user.setName(username);
user.setAge(age);
user.setBalance(balance);
int result = iUserService.insertUser(user);
if(result > 0){
return user;
}
user.setId(0L);
user.setName(null);
user.setUsername(null);
user.setBalance(null);
return user;
}
}
2.12 添加微服务启动类(springms-provider-user-mysql-mybatis-mapper/src/main/java/com/springms/cloud/MsProviderUserMysqlMybatisMapperApplication.java)
package com.springms.cloud;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
/**
* 链接Mysql数据库简单的集成Mybatis框架采用MapperXml访问数据库。
*
* @author hmilyylimh
*
* @version 0.0.1
*
* @date 2017-10-19
*
*/
@SpringBootApplication
@MapperScan("com.springms.cloud.mapper.**")
public class MsProviderUserMysqlMybatisMapperApplication {
public static void main(String[] args) {
SpringApplication.run(MsProviderUserMysqlMybatisMapperApplication.class, args);
System.out.println("【【【【【【 链接MysqlMybatisMapperXml数据库微服务 】】】】】】已启动.");
}
}
三、测试
/****************************************************************************************
注意:Mybatis 需要加上 entity 等注解才可以使用,不然启动都会报错;
@MapperScan("com.springms.cloud.mapper.**") 或者在每个 Mapper 接口文件上添加 @Mapper 也可以;
一、简单用户链接Mysql数据库微服务(通过 mybatis 链接 mysql 并用 MapperXml 编写数据访问):
1、启动 springms-provider-user-mysql-mybatis-mapper 模块服务,启动1个端口;
2、在浏览器输入地址 http://localhost:8330/simple/10 可以看到用户ID=10的信息成功的被打印出来;
3、使用 IDEA 自带工具 Test Restful WebService 发送 HTTP POST 请求,并添加 username、age、balance三个参数,然后执行请求,并去 mysql 数据库查看数据是否存在,正常情况下 mysql 数据库刚刚插入的数据成功了:
4、使用 REST Client 执行 "/simple/list" 接口,也正常将 mysql 数据库中所有的用户信息打印出来了;
****************************************************************************************/
四、下载地址
https://gitee.com/ylimhhmily/SpringCloudTutorial.git
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