spring boot 整合mybatis
阿新 • • 發佈：2017-11-28
參考 plugins odin system stack name incr xmlns xsd
參考： http://blog.csdn.net/saytime/article/details/74783296
spring boot可以使用全註解的方式進行開發，極大的提高了開發效率，為越來越多的公司所使用，
mybatis允許開發者使用sql語句，使開發更具靈活性。下面講一下如何將spring boot 和mybatis整合起來
0：準備數據
CREATE TABLE `tb_user` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT ‘ID‘, `username` varchar(50) NOT NULL COMMENT ‘用戶名‘, `age`int(11) NOT NULL COMMENT ‘年齡‘, `ctm` datetime NOT NULL COMMENT ‘創建時間‘, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8
INSERT INTO `db_test`.`tb_user` (`username`, `age`, `ctm`) VALUES(‘張三‘, ‘18‘, NOW()) ; INSERT INTO `db_test`.`tb_user` (`username`, `age`, `ctm`) VALUES(‘李四‘, ‘20‘, NOW()) ;
1：首先創建maven工程，工程目錄結構圖如下：springBootDemo1
2:添加springboot 的工程依賴pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.liyafei</groupId>
<artifactId>springBootDemo1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<webVersion>3.1</webVersion>
<mybatis-spring-boot.version>1.2.0</mybatis-spring-boot.version>
</properties>
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.RELEASE</version> </parent> <dependencies> <!-- Spring-Mybatis --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.0</version> </dependency> <!-- Add typical dependencies for a web application --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- MySQL --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.35</version> </dependency> </dependencies> <build> <!-- 將工程打包成可執行jar文件 --> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build>
3: 為工程添加配置文件applIcation.yml
application.yml
spring: //數據源
datasource:
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/demo
username: root
password: 1367356
mybatis: //配置mybatis
mapper-locations: classpath:mybatis/mapper/*.xml Mapper所在的配置文件路徑，進行掃描
config-location: classpath:mybatis/mybatis-config.xml mybaits-config文件
type-aliases-package: com.liyafei.dao.pojo <!-- pojo所在的包，與表一一對應-->
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.liyafei.dao.mapper.UserMapper" > <resultMap id="BaseResultMap" type="com.liyafei.dao.pojo.User" > <id column="id" property="id" jdbcType="INTEGER" /> <result column="username" property="username" jdbcType="VARCHAR" /> <result column="age" property="age" jdbcType="INTEGER" /> <result column="ctm" property="ctm" jdbcType="TIMESTAMP"/> </resultMap> <sql id="Base_Column_List" > id, username, age, ctm </sql> <select id="getUserList" resultMap="BaseResultMap" > SELECT <include refid="Base_Column_List" /> FROM tb_user </select> <select id="getUserById" parameterType="java.lang.Integer" resultMap="BaseResultMap" > SELECT <include refid="Base_Column_List" /> FROM tb_user WHERE id = #{id} </select> <insert id="add" parameterType="com.liyafei.dao.pojo.User" > INSERT INTO tb_user (username,age,ctm) VALUES (#{username}, #{age}, now()) </insert> <update id="update" parameterType="java.util.Map" > UPDATE tb_user SET username = #{user.username},age = #{user.age} WHERE id = #{id} </update> <delete id="delete" parameterType="java.lang.Integer" > DELETE FROM tb_user WHERE id = #{id} </delete> </mapper>
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <typeAliases> </typeAliases> </configuration>
4:創建dao層類
public class User {
private int id;
private String username;
private int age;
private Date ctm;
}
package com.liyafei.dao.mapper; import java.util.List; import org.apache.ibatis.annotations.Param; import org.springframework.stereotype.Repository; import com.liyafei.dao.pojo.User; @Repository public interface UserMapper { User getUserById(Integer id); public List<User> getUserList(); public int add(User user); public int update(@Param("id") Integer id, @Param("user") User user); public int delete(Integer id); }
5：創建service層
package com.liyafei.service;
import java.util.List;
import com.liyafei.dao.pojo.User;
public interface UserService {
User getUserById(Integer id);
public List<User> getUserList();
public int add(User user);
public int update(Integer id, User user);
public int delete(Integer id);
}
package com.liyafei.service;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.liyafei.dao.mapper.UserMapper;
import com.liyafei.dao.pojo.User;
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserMapper userMapper;
public User getUserById(Integer id) {
return userMapper.getUserById(id);
}
public List<User> getUserList() {
return userMapper.getUserList();
}
public int add(User user) {
return userMapper.add(user);
}
public int update(Integer id, User user) {
return userMapper.update(id, user);
}
public int delete(Integer id) {
return userMapper.delete(id);
}
}
6：創建controller層
package com.liyafei.controller;
import javax.websocket.server.PathParam;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import com.liyafei.dao.pojo.User;
import com.liyafei.service.UserService;
import com.liyafei.util.JsonResult;
@RestController
public class UserController {
@Autowired
private UserService userService;
/**
* ????ID??????
* @param id
* @return
*/
@RequestMapping(value = "user/{id}", method = RequestMethod.GET)
public ResponseEntity<JsonResult> getUserById (@PathVariable(value="id") String id){
//@ResponseBody
//public String getUserById (@PathVariable(value="id") String id){
System.out.println(id);
JsonResult r = new JsonResult();
int id1=Integer.parseInt(id);
try {
User user = userService.getUserById(id1);
r.setResult(user);
r.setStatus("ok");
} catch (Exception e) {
r.setResult(e.getClass().getName() + ":" + e.getMessage());
r.setStatus("error");
e.printStackTrace();
}
//return "hello world";
return ResponseEntity.ok(r);
}
}
7：創建util工具類
package com.liyafei.util; public class JsonResult { private String status = null; private Object result = null; public JsonResult status(String status) { this.status = status; return this; } public String getStatus() { return status; } public void setStatus(String status) { this.status = status; } public Object getResult() { return result; } public void setResult(Object result) { this.result = result; } }
8：創建主函數，主函數需位於根目錄下，與其同級的包將會被掃描
package com.liyafei; import org.mybatis.spring.annotation.MapperScan; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.ComponentScan; @EnableAutoConfiguration @SpringBootApplication @MapperScan("com.liyafei.dao.mapper") public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
9：啟動工程，進行測試，成功。
spring boot 整合mybatis