SpringBoot对JavaWeb项目的简单部署

SpringBoot对JavaWeb项目的简单部署

1.基础依赖导入(pom文件)

    <!--       MyBatis整合Spring-boot-->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.1.2</version>
    </dependency>
    
    <!--       mysql连接驱动-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    
    <!--       lombok依赖-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>
    
    <!--       Spring-boot-web项目-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    
    <!--       Druid数据库连接池-->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
        <version>1.1.22</version>
    </dependency>

2.文件配置信息(yml文件)

#tomcat端口号
server:
  port: 8081

#连接数据库信息
spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql:///air?serverTimezone=UTC
    username: root
    password: 123456
    type: com.alibaba.druid.pool.DruidDataSource
    
#spring boot已经集成logback日志
logging:
  level:
    com.hk.firstspringboot.mapper: DEBUG #扫描这个包下,(可以扫描mapper包下的接口类,打印出Sql语句)
    
# mybatis配置
mybatis:
  # 扫描映射文件
  mapper-locations: classpath:mapper/*.xml
  # 配置别名扫描的包
 #type-aliases-package: com.hk.firstspringboot.entity
 #configuration:
    # 开启驼峰映射配置
   #map-underscore-to-camel-case: true

3.其它注意:

1.mapper 接口包要扫描:在启动类上加注解:@MapperScan(basePackages = "例子:com.hk.easycodetest.mapper")

4.SpringBoot开启使用事务

启动类注解:

@EnableTransactionManagement // 启注解事务管理，等同于xml配置方式的 <tx:annotation-driven />

@Transactional(propagation=Propagation.REQUIRED) //默认等同于@Transactional

表示当前方法必须运行在事务中。如果当前事务存在，方法将会在该事务中运行。否则，会启动一个新的事务

https://www.cnblogs.com/kesimin/p/9546225.html

5.mapping的XML文档格式

<?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.hk.easycodetest.dao.DistrictDao">

    <resultMap type="com.hk.easycodetest.entity.District" id="DistrictMap">
        <result property="id" column="id" jdbcType="INTEGER"/>
        <result property="name" column="name" jdbcType="VARCHAR"/>
    </resultMap>

    <!--查询单个-->
    <select id="queryById" resultMap="DistrictMap">
        select
          id, name
        from air.district
        where id = #{id}
    </select>

    <!--查询指定行数据-->
    <select id="queryAllByLimit" resultMap="DistrictMap">
        select
          id, name
        from air.district
        limit #{offset}, #{limit}
    </select>

    <!--通过实体作为筛选条件查询-->
    <select id="queryAll" resultMap="DistrictMap">
        select
        id, name
        from air.district
        <where>
            <if test="id != null">
                and id = #{id}
            </if>
            <if test="name != null and name != ''">
                and name = #{name}
            </if>
        </where>
    </select>

    <!--新增所有列-->
    <insert id="insert" keyProperty="id" useGeneratedKeys="true">
        insert into air.district(name)
        values (#{name})
    </insert>

    <!--通过主键修改数据-->
    <update id="update">
        update air.district
        <set>
            <if test="name != null and name != ''">
                name = #{name},
            </if>
        </set>
        where id = #{id}
    </update>

    <!--通过主键删除-->
    <delete id="deleteById">
        delete from air.district where id = #{id}
    </delete>

</mapper>