springboot集成mybatis实例代码

springboot如何配置web项目请参考前一章，在此基础上集成mybatis。

在pom文件中添加mybatis的依赖：

  
   org.mybatis.spring.boot
   mybatis-spring-boot-starter
   1.2.0
  

添加mysql驱动：

  
   mysql
   mysql-connector-java
  

添加druid和fastjson依赖，使用阿里巴巴druid连接池

  
   com.alibaba
   druid
   1.0.28
  
  
   com.alibaba
   fastjson
   1.2.30
  

配置数据源，在application.yml中：

spring:
  datasource:
    name: test
    url: jdbc:mysql://127.0.0.1:3306/test
    username: root
    password: 111111
    # 使用druid数据源
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    filters: stat
    maxActive: 20
    initialSize: 1
    maxWait: 60000
    minIdle: 1
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: select 'x'
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
    maxOpenPreparedStatements: 20

设置mybatis的mapper和model扫描路径：

mybatis:
  mapperLocations: classpath:mapper
public class UserEntity {
 private Long id;
 private String username;
 private String password;

 public Long getId() {
  return id;
 }

 public void setId(Long id) {
  this.id = id;
 }

 public String getUsername() {
  return username;
 }

 public void setUsername(String username) {
  this.username = username;
 }

 public String getPassword() {
  return password;
 }

 public void setPassword(String password) {
  this.password = password;
 }
}

UserDao

package com.yingxinhuitong.demo.dao;

import com.yingxinhuitong.demo.model.UserEntity;
import org.apache.ibatis.annotations.Mapper;

import java.util.List;


@Mapper
public interface UserDao {
 List searchAll();
}

UserMapper.xml

 
 
  
  
  
 
 
 
  select * from tab_user
 

创建一个控制器，注入UserDao，测试一下可不可以查询数据了：

@RestController
public class TestController {

 @Resource
 UserDao userDao;

 @RequestMapping("/getusers")
 public String test() {
  List users = userDao.searchAll();
  String usersJson = JSON.toJSonString(users);
  return usersJson;
 }
}

运行Application.class,启动成功后访问：http://localhost:9000/demo/getusers,输出内容如下：

复制代码 代码如下:
[{"id":1,"password":"000000","username":"test"},{"id":2,"password":"111111","username":"test1"},{"id":3,"password":"222222","username":"test2"}]

至此，springboot已完成对mybatis的集成。

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