JAVA MyBatis使用

1、XMl MyBatis

<?xml version="1.0" encoding="UTF-8"?>
<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.jsapi002.spring</groupId>
    <artifactId>boot</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <!--Spring Boot项目需要指定的父项目-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <!--Spring Boot Web项目的starter包，Web项目引入此包-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!--Spring Boot项目数据库读写的starter包，需要数据库读写是引入此包即可-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!--Spring Boot默认情况下不支持JSP模板，推荐使用thymeleaf模板引擎，引入此starter即可-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>
        <!--WebSocket支持-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-websocket</artifactId>
        </dependency>
        <!--mysql连接器-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!--Spring Boot提供的项目打为Jar包的Maven插件，执行mvn package即可打为可启动jar包。-->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

2、propertis

spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=19930228

mybatis.mapper-locations=classpath:mybatis/*.xml
mybatis.type-aliases-package=com.jsapi002.spring.mapper

3、resource/mapper/common.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.jsapi002.spring.mapper.Commondbmapper">
    <select id="getList" resultType="com.jsapi002.spring.User">
        select * from rd_sample where name_cn = "SV681"
    </select>

</mapper>

4、Commondbmapper

package com.jsapi002.spring.mapper;

import com.jsapi002.spring.User;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Component;

@Mapper
@Component
public interface Commondbmapper {
    public User getList();
}

5、使用

package com.jsapi002.spring.controller;

import com.jsapi002.spring.User;
import com.jsapi002.spring.mapper.Commondbmapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@Component
public class TikDemo{
        @Autowired
        private Commondbmapper commondbmapper;

        @RequestMapping("/rest")
        public String com() {
            User res =  commondbmapper.getList();
            return res.toString();
        }
}

6、启动

package com.jsapi002.spring;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.jsapi002.spring.mapper")
public class Main {

    public static void main(String[] args) {
        SpringApplication.run(Main.class);
    }
}