前言
涉及的技术栈：springboot、mybatis、分页插件pagehelper、Druid数据源
gitee源码地址：https://gitee.com/shawsongyue/sevenhee_modules/tree/master/springboot_mybatis
1.基础maven依赖
<!--MyBatis分页插件--> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper-spring-boot-starter</artifactId> <version>1.2.10</version> </dependency> <!--druid数据源--> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid-spring-boot-starter</artifactId> <version>1.1.10</version> </dependency> <!--Mysql数据库驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.19</version> </dependency> <!--mybatis依赖--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.2</version> </dependency> <!--单元测试--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!--集成springmvc框架并实现自动配置 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- Lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency>
2.目录结构与配置文件
#服务配置 server: port: 8080 #spring配置 spring: #数据源 datasource: url: jdbc:mysql://localhost:3306/sevenhee_modules?useUnicode=true&characterEncoding=utf-8&serverTimezone=Asia/Shanghai username: root password: gnnykj.2020 driver-class-name: com.mysql.cj.jdbc.Driver type: com.alibaba.druid.pool.DruidDataSource druid: initial-size: 5 min-idle: 5 max-active: 20 max-wait: 60000 time-between-eviction-runs-millis: 60000 min-evictable-idle-time-millis: 30000 validation-query: SELECT 1 FROM DUAL test-while-idle: true test-on-borrow: true test-on-return: false pool-prepared-statements: true max-pool-prepared-statement-per-connection-size: 20 filter: stat: merge-sql: true slow-sql-millis: 5000 web-stat-filter: enabled: true url-pattern: /* exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*" session-stat-enable: true session-stat-max-count: 100 stat-view-servlet: enabled: true url-pattern: /druid/* reset-enable: true login-username: admin login-password: admin allow: 127.0.0.1 #mybatis配置 mybatis: #xml文件配置路径（两种选择） mapper-locations: #资源目录 # - classpath:mapper/*.xml #src文件目录下 - classpath*:com/**/mapper/impl/*.xml #实体类别名配置 type-aliases-package: com.xsy.sevenhee.modules.entity #分页插件配置 pagehelper: helper-dialect: mysql reasonable: true support-methods-arguments: true params: count=countSql
3.创建数据库表
4.创建实体层(SysUser.class)
import lombok.Data; import lombok.NoArgsConstructor; import java.util.Date; /** * 系统用户 * * @author xiaosongyue * @date 2021/04/14 15:22:11 */ @Data @NoArgsConstructor public class SysUser { private Long id; private String username; private String password; private Date createTime; private Date updateTime; private int deleted; private int version; }
4.创建mapper层(SysUserMapper.class)
import com.xsy.sevenhee.modules.entity.SysUser; import java.util.List; /** * 系统用户映射器 * * @author xiaosongyue * @date 2021/04/14 15:17:17 */ public interface SysUserMapper { /** * 查询全部系统用户 * * @return {@link List<SysUser>} */ List<SysUser> selectAllSysUser(); /** * 插入系统用户 * * @param sysUser 系统用户 * @return int */ int insertSysUser(SysUser sysUser); /** * 删除系统用户 * * @param id id * @return int */ int deleteById(Long id); /** * 更新系统用户 * * @param sysUser 系统用户 * @return int */ int updateSysUserById(SysUser sysUser); }
4.创建xml映射文件(SysUserMapper.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.xsy.sevenhee.modules.mapper.SysUserMapper"> <select id="selectAllSysUser" resultType="SysUser"> select * from sys_user </select> <insert id="insertSysUser" parameterType="SysUser"> insert into sys_user values (#{id},#{username},#{password},#{createTime},#{updateTime},#{deleted},#{version}) </insert> <delete id="deleteById" parameterType="Long"> delete from sys_user where id=#{id} </delete> <update id="updateSysUserById" parameterType="SysUser"> update sys_user set username=#{username},password=#{password},create_time=#{createTime},update_time=#{updateTime},deleted=#{deleted},version=#{version} where id=#{id} </update> </mapper>
6.创建service层(SysUserService.class)
import com.github.pagehelper.PageInfo; import com.xsy.sevenhee.modules.entity.SysUser; import java.util.List; /** * 系统用户服务 * * @author xiaosongyue * @date 2021/04/14 15:53:23 */ public interface SysUserService { /** * 获取全部用户 * * @return {@link List<SysUser>} */ List<SysUser> getAllSysUser(); /** * 添加系统用户 * * @param sysUser 系统用户 * @return int */ int addSysUser(SysUser sysUser); /** * 根据id删除用户 * * @param id id * @return int */ int deleteById(Long id); /** * 根据用户id修改用户信息 * * @param sysUser 系统用户 * @return int */ int modifySysUserById(SysUser sysUser); /** * 获取全部用户，分页 * * @param pageNum 页码 * @param pageSize 页面大小 * @return {@link PageInfo<SysUser>} */ PageInfo<SysUser> getAllSysUserByPage(Integer pageNum, Integer pageSize); }
6.创建service层实现类(SysUserServiceImpl.class)
import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.xsy.sevenhee.modules.entity.SysUser; import com.xsy.sevenhee.modules.mapper.SysUserMapper; import com.xsy.sevenhee.modules.service.SysUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; /** * 系统用户服务实现类 * * @author xiaosongyue * @date 2021/04/14 15:55:13 */ @Service public class SysUserServiceImpl implements SysUserService { @Autowired private SysUserMapper sysUserMapper; @Override public List<SysUser> getAllSysUser() { return sysUserMapper.selectAllSysUser(); } @Override public PageInfo<SysUser> getAllSysUserByPage(Integer pageNum, Integer pageSize) { PageHelper.startPage(pageNum, pageSize); return new PageInfo<>(sysUserMapper.selectAllSysUser()); } @Override public int addSysUser(SysUser sysUser) { return sysUserMapper.insertSysUser(sysUser); } @Override public int deleteById(Long id) { return sysUserMapper.deleteById(id); } @Override public int modifySysUserById(SysUser sysUser) { return sysUserMapper.updateSysUserById(sysUser); } }
7.创建controller层(SysUserController.class)
import com.github.pagehelper.PageInfo; import com.xsy.sevenhee.modules.entity.SysUser; import com.xsy.sevenhee.modules.service.SysUserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.Date; import java.util.List; /** * 系统用户控制器 * * @author xiaosongyue * @date 2021/04/14 16:24:54 */ @RestController @RequestMapping("/sys_user") public class SysUserController { @Autowired private SysUserService sysUserService; /** * 插入 */ @GetMapping("/insert") public void insert(){ SysUser sysUser = new SysUser(); sysUser.setId(22L); sysUser.setCreateTime(new Date()); sysUser.setPassword("1234567"); sysUser.setUpdateTime(new Date()); sysUser.setDeleted(0); sysUser.setVersion(1); sysUser.setUsername("xsxsxsxs"); System.out.println(sysUserService.addSysUser(sysUser)); } /** * 删除通过id */ @GetMapping("/deleteById") public void deleteById(){ System.out.println(sysUserService.deleteById(22L)); } /** * 更新 */ @GetMapping("/update") public void update(){ SysUser sysUser = new SysUser(); sysUser.setUsername("opopop"); sysUser.setId(22L); sysUser.setCreateTime(new Date()); sysUser.setPassword("1234dfasdsds567"); sysUser.setUpdateTime(new Date()); sysUser.setDeleted(0); sysUser.setVersion(1); System.out.println(sysUserService.modifySysUserById(sysUser)); } /** * 获取所用用户 */ @GetMapping("/getAllSysUser") public void getAllSysUser(){ List<SysUser> sysUsers = sysUserService.getAllSysUser(); System.out.println("测试："+sysUsers); } /** * 获取所有用户并分页 */ @GetMapping("/getAllSysUserByPage") public void getAllSysUserByPage(){ PageInfo<SysUser> sysUsers = sysUserService.getAllSysUserByPage(1,3); System.out.println("分页测试："+sysUsers); } }
8.创建主启动类(MybatisApplication.class)
import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; /** * mybatis应用程序 * * @author xiaosongyue * @date 2021/04/14 15:44:28 */ @SpringBootApplication public class MybatisApplication { public static void main(String[] args) { SpringApplication.run(MybatisApplication.class,args); } }
9.访问controller层接口测试
访问路径：http://localhost:8080/sys_user/getAllSysUser
10.访问druid数据源监控
访问路径：http://localhost:8080/druid/login.html
账号密码都是：admin
11.gitee源码地址：
https://gitee.com/shawsongyue/sevenhee_modules/tree/master/springboot_mybatis
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