SpringBoot整合Mybatis你都會了嗎？來看看技术頭條網

2018-09-19 17:25:30 java開發者

learnSpringBootWithMybatis

org.springframework.boot

spring-boot-starter-parent
2.0.5.RELEASE

UTF-8
UTF-8
1.8

org.springframework.boot
spring-boot-starter-web

org.mybatis.spring.boot
mybatis-spring-boot-starter
1.3.2

mysql
mysql-connector-java
runtime

org.springframework.boot
spring-boot-starter-test
test

org.springframework.boot
spring-boot-maven-plugin

6.接下來就要寫代碼了。新建controller,entity,dao,servcie,service.impl包。在資源文件夾中新建mapper包。在資源文件夾中新建application.yml文件。新建完成後的文件目錄如下圖：

SpringBoot/Mybatis

7.編寫application.yml配置文件。內容如下

# 默認使用開發配置
spring:
 profiles:
 active: dev
 
#配置mybatis參數
mybatis:
 type-aliases-package: com.zcz.entity
 mapper-locations: classpath:mapper/*.xml
 
--- 
 
#開發配置
spring:
 profiles: dev
 datasource: 
 url: jdbc:mysql://localhost:3306/learnspringbootwithmybatis
 driver-class-name: com.mysql.jdbc.Driver
 username: root
 password: 123

8.新建數據庫learnspringbootwithmybatis，並在數據庫中新建表user

SpringBoot/Mybatis

9.在entity包中新建User類，代碼如下：

package com.zcz.entity;public class User { private int id; private String name; public int getId() { return id;
 } public void setId(int id) { this.id = id;
 } public String getName() { return name;
 } public void setName(String name) { this.name = name;
 }
 
}

10.在dao中，新建UserDao接口類，並添加@Mapper註解，代碼如下：

類中用到了@Mapper註解，如果你不瞭解他們的用法和意義的話可以參考常用註解記錄

package com.zcz.dao;import java.util.List;import org.apache.ibatis.annotations.Mapper;import com.zcz.entity.User;
@Mapperpublic interface UserDao { public List findAllUser();
}

11.在service中新建UserService 接口，代碼如下：

package com.zcz.service;import java.util.List;import com.zcz.entity.User;public interface UserService { public List getUsers();
}

12.在service.impl中新建UserServiceImpl實現類，實現UserService接口，添加@Service註解，代碼如下：

類中用到了@Service,@Autowired註解，如果你不瞭解他們的用法和意義的話可以參考常用註解記錄

package com.zcz.service.impl;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import com.zcz.dao.UserDao;import com.zcz.entity.User;import com.zcz.service.UserService;
@Servicepublic class UserServiceImpl implements UserService {
 @Autowired private UserDao userDao;
 
 @Override public List getUsers() { // TODO Auto-generated method stub
 return userDao.findAllUser();
 }
}

13.在controller中新建UserController類，並配置訪問路徑，代碼如下：

類中用到了@RestController,@RequestMapping註解，如果你不瞭解他們的用法和意義的話可以參考常用註解記錄

package com.zcz.controller;import java.util.List;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import com.zcz.entity.User;import com.zcz.service.UserService;
@RestController
@RequestMapping("/user")public class UserController {
 
 @Autowired private UserService userService;
 
 @RequestMapping("/getUser") public List getUsers(){ return userService.getUsers();
 }
}

14，在mapper中新建UserMapper.xml

15,修改數據庫，添加兩天記錄