一、上一篇學習了服務提供者provider,可是並非單單就學習了服務提供者。中間還穿插使用了Hikari數據源和spring cloud整合mybatis。可是上篇使用mybatis時仍是沿用了老的方式,須要配置mapper對應的xml文件。先來看看上篇使用mybatis的主要步驟java
1、 pom.xml文件引用spring
<dependency>apache
<groupId>org.mybatis</groupId>restful
<artifactId>mybatis-spring</artifactId>mybatis
<version>1.3.2</version>app
</dependency>ide
<dependency>spring-boot
<groupId>org.mybatis.spring.boot</groupId>post
<artifactId>mybatis-spring-boot-starter</artifactId>學習
<version>1.3.2</version>
</dependency>
2、application.yml配置文件加入mybtias配置項
mybatis:
mapperLocations: classpath:sc/provider/dao/*.xml
#configLocation: classpath:mybatis-config.xml
3、編寫mapper文件user-mapper.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="sc.provider.dao.UserDao" >
<select id="getUser" parameterType="java.lang.Long" resultType="sc.provider.model.User">
select id, userName, age, position from t_user where id = #{id,jdbcType=INTEGER}
</select>
<select id="listUser" resultType="sc.provider.model.User">
select id, userName, age, position from t_user
</select>
<insert id="addUser" parameterType="sc.provider.model.User">
insert into t_user (
id, userName, age, position
) values (
#{id,jdbcType=INTEGER},
#{userName,jdbcType=VARCHAR},
#{age,jdbcType=INTEGER},
#{position,jdbcType=VARCHAR}
)
</insert>
<update id="updateUser" parameterType="sc.provider.model.User">
update t_user set
userName = #{userName,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER},
position = #{position,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
<delete id="deleteUser" parameterType="java.lang.Long">
delete from t_user
where id = #{id,jdbcType=INTEGER}
</delete>
</mapper>
4、編寫UserDao.java
package sc.provider.dao;
import java.util.List;
import sc.provider.model.User;
public interface UserDao {
User getUser(Long id);
List<User> listUser();
int addUser(User user);
int updateUser(User user);
int deleteUser(Long id);
}
5、 在ProviderApplication.java添加@MapperScan(basePackages="sc.provider.dao")
通過上面五個步驟才能使用mybatis。本篇將和你們看看不能簡化spring cloud 整合mybatis的步驟(在sc-eureka-client-provider工程上改造)
1、 依賴必不可少
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
2、 刪除application.yml關於mybatis的配置
3、 刪除mapper文件user-mapper.xml文件
4、改造UserDao.java類
package sc.provider.dao;
import java.util.List;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import sc.provider.model.User;
@Mapper
public interface UserDao {
@Select(value="select id, userName, age, position from t_user where id = #{id,jdbcType=INTEGER}")
User getUser(Long id);
@Select(value="select id, userName, age, position from t_user")
List<User> listUser();
@Insert(value="insert into t_user (id, userName, age, position) values ( #{id,jdbcType=INTEGER},#{userName,jdbcType=VARCHAR},#{age,jdbcType=INTEGER},#{position,jdbcType=VARCHAR})")
int addUser(User user);
@Update(value="update t_user set userName = #{userName,jdbcType=VARCHAR},age = #{age,jdbcType=INTEGER},position = #{position,jdbcType=VARCHAR} where id = #{id,jdbcType=INTEGER}")
int updateUser(User user);
@Delete(value=" delete from t_user where id = #{id,jdbcType=INTEGER}")
int deleteUser(Long id);
}
5、 @MapperScan註解必不可少
package sc.provider;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
@SpringBootApplication
@EnableEurekaClient
@MapperScan(basePackages="sc.provider.dao")
public class ProviderApplication {
public static void main(String[] args) {
SpringApplication.run(ProviderApplication.class, args);
}
}
通過以上步驟就把使用xml方式的mybatis改形成使用annotation方式的mybatis了。
二、啓動註冊中心sc-eureka-server,啓動sc-eureka-client-provider-annotation(使用sc-eureka-client-provider項目改造),驗證是否改形成功
方式一:
方式二:
圈住的名字是在application.yml配置的
三、使用postman方法相應restful接口,這裏就不一一訪問了,能夠參考上一篇文章的訪問方式
添加:
http://127.0.0.1:8300/user/addUser
查詢:
http://127.0.0.1:8300/user/getUser/4
列表:
http://127.0.0.1:8300/user/listUser
更新:
http://127.0.0.1:8300/user/updateUser
刪除:
http://127.0.0.1:8300/user/deleteUser/2