springboot SSM

tk.mybatis

连接池

pom

在 pom.xml 文件中引入 druid-spring-boot-starter 依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.10</version>
</dependency>

引入数据库连接依赖

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

配置 application.yml

spring:
  datasource:
    druid:
      url: jdbc:mysql://ip:port/dbname?useUnicode=true&characterEncoding=utf-8&useSSL=false
      username: root
      password: 123456
      initial-size: 1
      min-idle: 1
      max-active: 20
      test-on-borrow: true
      driver-class-name: com.mysql.jdbc.Driver

使用 MyBatis 的 Maven 插件生成代码

pom

<build>
    <plugins>
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.5</version>
            <configuration>
                <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                <overwrite>true</overwrite>
                <verbose>true</verbose>
            </configuration>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>${mysql.version}</version>
                </dependency>
                <dependency>
                    <groupId>tk.mybatis</groupId>
                    <artifactId>mapper</artifactId>
                    <version>3.4.4</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>

在 src/main/resources/generator/ 目录下创建 generatorConfig.xml 配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <!-- 引入数据库连接配置 -->
    <properties resource="jdbc.properties"/>

    <context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="beginningDelimiter" value="`"/>
        <property name="endingDelimiter" value="`"/>

        <!-- 配置 tk.mybatis 插件 -->
        <plugin type="tk.mybatis.mapper.generator.MapperPlugin">
            <property name="mappers" value="com.funtl.utils.MyMapper"/>
        </plugin>

        <!-- 配置数据库连接 -->
        <jdbcConnection
                driverClass="${jdbc.driverClass}"
                connectionURL="${jdbc.connectionURL}"
                userId="${jdbc.username}"
                password="${jdbc.password}">
        </jdbcConnection>

        <!-- 配置实体类存放路径 -->
        <javaModelGenerator targetPackage="com.funtl.hello.spring.boot.entity" targetProject="src/main/java"/>

        <!-- 配置 XML 存放路径 -->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/>

        <!-- 配置 DAO 存放路径 -->
        <javaClientGenerator
                targetPackage="com.funtl.hello.spring.boot.mapper"
                targetProject="src/main/java"
                type="XMLMAPPER"/>

        <!-- 配置需要生成的表，% 代表所有 -->
        <table tableName="%">
            <!-- mysql 配置 -->
            <generatedKey column="id" sqlStatement="Mysql" identity="true"/>
        </table>
    </context>
</generatorConfiguration>

在 src/main/resources 目录下创建 jdbc.properties 数据源配置：

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.connectionURL=jdbc:mysql://ip:port/dbname?useUnicode=true&characterEncoding=utf-8&useSSL=false
jdbc.username=root
jdbc.password=123456

Spring Boot 整合 tk.mybatis

pom

<dependency>
    <groupId>tk.mybatis</groupId>
    <artifactId>mapper-spring-boot-starter</artifactId>
    <version>2.0.2</version>
</dependency>

配置 application.yml

mybatis:
    type-aliases-package: 实体类的存放路径，如：com.funtl.hello.spring.boot.entity
    mapper-locations: classpath:mapper/*.xml

重构

重构mapper

创建一个通用的父级接口

主要作用是让 DAO 层的接口继承该接口，以达到使用 tk.mybatis 的目的,这里mapper抽取出来放到通用的项目中

package tk.mybatis.mapper;

import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;

/**
 * 自己的 Mapper
 * 特别注意，该接口不能被扫描到，否则会出错
 * <p>Title: MyMapper</p>
 * <p>Description: </p>
 *
 * @author Lusifer
 * @version 1.0.0
 * @date 2018/5/29 0:57
 */
public interface MyMapper<T> extends Mapper<T>, MySqlMapper<T> {
}

Mapper继承之前的通用父级mapper

import org.faramita.itoken.common.domain.TbSysUser;
import org.springframework.stereotype.Repository;
import tk.mybatis.mapper.MyMapper;

@Repository
public interface TbSysUserExtendMapper extends MyMapper<TbSysUser> {
}

重构BaseService

常用的crud等service抽取出来，放到commons工程中

这里的BaseDomain是领域模型的基类，就是entity实体类把通用的字段抽取出来，然后entity就可以继承该类，省略重复的类的书写

package org.faramita.itoken.common.service;

import com.github.pagehelper.PageInfo;
import org.faramita.itoken.common.domain.BaseDomain;

public interface BaseService<T extends BaseDomain> {
    int insert(T t, String createBy);

    int delete(T t);

    int update(T t, String updateBy);

    int count(T t);

    T selectOne(T t);

    PageInfo<T> page(int pageNum, int pageSize, T t);
}

实际service继承之前的通用父级service，有特殊的就这里添加就行了。

package org.faramita.itoken.service.admin.service;

import org.faramita.itoken.common.domain.BaseDomain;
import org.faramita.itoken.common.service.BaseService;

public interface AdminService extends BaseService<TbSysUser> {
}

重构BaseServiceImpl

package org.faramita.itoken.common.service.impl;

import org.faramita.itoken.common.domain.BaseDomain;
import org.faramita.itoken.common.service.BaseService;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import tk.mybatis.mapper.MyMapper;

import java.util.Date;

@Service
@Transactional(readOnly = true)
public abstract class BaseServiceImpl<T extends BaseDomain, D extends MyMapper<T>> implements BaseService<T> {

    @Autowired
    private D dao;

    @Override
    @Transactional(readOnly = false)
    public int insert(T t, String createBy) {
        t.setCreateBy(createBy);
        t.setCreateDate(new Date());
        t.setUpdateBy(createBy);
        t.setUpdateDate(new Date());
        return dao.insert(t);
    }

    @Override
    @Transactional(readOnly = false)
    public int delete(T t) {
        return dao.delete(t);
    }

    @Override
    @Transactional(readOnly = false)
    public int update(T t, String updateBy) {
        t.setUpdateBy(updateBy);
        t.setUpdateDate(new Date());
        return dao.updateByPrimaryKey(t);
    }

    @Override
    public int count(T t) {
        return dao.selectCount(t);
    }

    @Override
    public T selectOne(T t) {
        return dao.selectOne(t);
    }

    @Override
    public PageInfo<T> page(int pageNum, int pageSize, T t) {
        PageHelper pageHelper = new PageHelper();
        pageHelper.startPage(pageNum, pageSize);

        PageInfo<T> pageInfo = new PageInfo<>(dao.select(t));
        return pageInfo;
    }
}

实际serviceImpl继承之前的通用父级service，有特殊的就这里添加就行了。

implements AdminService ,这里泛型用TbSysUser说明service中操作的是TbSysUser类

extends BaseServiceImpl<TbSysUser,TbSysUserMapper>，这里泛型用TbSysUser和TbSysUserMapper，说明serviceImpl中操作的是TbSysUser类和TbSysUserMapper

package org.faramita.itoken.service.admin.service.impl;

import org.faramita.itoken.common.domain.TbSysUser;
import org.faramita.itoken.common.mapper.TbSysUserMapper;
import org.faramita.itoken.common.service.impl.BaseServiceImpl;
import org.faramita.itoken.service.admin.service.AdminService;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
@Transactional(readOnly = true)
public class AdminServiceImpl extends BaseServiceImpl<TbSysUser,TbSysUserMapper> implements AdminService

}