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springboot集成mybatis实例代码

2017-04-20 16:54 1116 查看

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：

<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.2.0</version>
</dependency>

添加mysql驱动：

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>

添加druid和fastjson依赖，使用阿里巴巴druid连接池

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.28</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.30</version>
</dependency>

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/*.xml
typeAliasesPackage: com.yingxinhuitong.demo.model
#更多配置请参见：http://www.mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/

接下来我们新建userMapper.xml,UserEntity以及UserDao：

UserEntity.class

package com.yingxinhuitong.demo.model;
/**
* Created by jack on 2017/4/20.
*/
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;
/**
* Created by jack on 2017/4/20.
*/
@Mapper
public interface UserDao {
List<UserEntity> searchAll();
}

UserMapper.xml

<?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.yingxinhuitong.demo.dao.UserDao" >
<!-- 字段与实体的映射 -->
<resultMap id="BaseResultMap" type="com.yingxinhuitong.demo.model.UserEntity">
<id column="id" property="id" jdbcType="BIGINT" />
<result column="username" property="username" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
</resultMap>
<!-- 根据条件查询，全部 -->
<select id="searchAll" resultMap="BaseResultMap">
select * from tab_user
</select>
</mapper>

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<UserEntity> 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。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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