网站开发费怎么做会计分录,水果建设网站前的市场分析,建筑人才网代码,wordpress 图片超链接文章目录 1.整合MyBatis1.需求分析2.数据库表设计3.数据库环境配置1.新建maven项目2.pom.xml 引入依赖3.application.yml 配置数据源4.Application.java 编写启动类5.测试6.配置类切换druid数据源7.测试数据源是否成功切换 4.Mybatis基础配置1.编写映射表的bean2.MonsterMapper… 文章目录 1.整合MyBatis1.需求分析2.数据库表设计3.数据库环境配置1.新建maven项目2.pom.xml 引入依赖3.application.yml 配置数据源4.Application.java 编写启动类5.测试6.配置类切换druid数据源7.测试数据源是否成功切换 4.Mybatis基础配置1.编写映射表的bean2.MonsterMapper.java 编写mapper接口3.MonsterMapper.xml 编写mapper.xml实现mapper接口4.application.yml 扫描mapper.xml配置文件的位置5.测试 5.MyBatis高级配置1.方式一在application.yml中配置mybatis.config-location指定mybatis-config.xml配置文件的位置2.方式二直接在application.yml中配置 6.继续编写Service层和Controller层1.MonsterService.java2.MonsterServiceImpl.java3.测试4.MonsterController.java5.测试6.解决时间问题 7.完整文件目录 2.整合MyBatis-Plus1.MyBatis-Plus基本介绍2.数据库表设计3.数据库环境配置1.创建maven项目2.pom.xml 导入依赖3.application.yml 配置数据源4.DruidDataSourceConfig.java 配置类切换druid数据源5.编写启动类Application.java测试运行 4.MyBatis-Plus基础配置1.编写映射表的bean2.MonsterMapper.java 编写Mapper接口3.测试接口方法使用 5.MyBatis-Plus高级配置application.yml 进行配置 6.继续编写Service层和Controller层1.MonsterService.java2.MonsterServiceImpl.java3.测试4.细节说明5.MonsterController.java 7.细节说明1.MapperScan 扫描包下的所有Mapper启动类配置注解 2.TableName bean的类名与表名不一致时使用image-202403172009519713.MyBatis引入了哪些依赖 8.MyBatisX快速开发1.安装插件2.使用方式1.挑一个带小鸟的方法2.直接alt Enter3.生成sql语句4.查看生成的方法5.点击左边的小鸟就可以直接跳转到指定方法或者xml 9.完整文件目录10.MyBatis-Plus小结 1.整合MyBatis
1.需求分析 2.数据库表设计
CREATE DATABASE springboot_mybatis;use springboot_mybatis;CREATE TABLE monster (id INT NOT NULL AUTO_INCREMENT,age INT NOT NULL, birthday DATE DEFAULT NULL, email VARCHAR(255) DEFAULT NULL,gender char(1) DEFAULT NULL,name VARCHAR(255) DEFAULT NULL, salary DOUBLE NOT NULL,PRIMARY KEY (id)
);SELECT * FROM monster;insert into monster values(null, 20, 2000-11-11, nmwsohu.com, 男, 牛魔王, 5000.88);
insert into monster values(null, 10, 2011-11-11, bgjsohu.com, 女, 白骨精, 2000.00);3.数据库环境配置
1.新建maven项目 2.pom.xml 引入依赖 !--导入springboot父工程--parentartifactIdspring-boot-starter-parent/artifactIdgroupIdorg.springframework.boot/groupIdversion2.5.3/version/parent!--引入相关依赖--dependencies!--常规依赖--!--web场景启动器--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependency!--lombok--dependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdoptionaltrue/optional/dependency!--引入测试场景启动器--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactIdscopetest/scope/dependency!--配置处理器--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-configuration-processor/artifactIdoptionaltrue/optional/dependency!--数据库配置--!--引入data-jdbc数据源--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-data-jdbc/artifactId/dependency!--mysql依赖使用版本仲裁--dependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdscoperuntime/scope/dependency!-- 引入 druid 依赖 --dependencygroupIdcom.alibaba/groupIdartifactIddruid/artifactIdversion1.1.17/version/dependency!--MyBatis场景启动器--dependencygroupIdorg.mybatis.spring.boot/groupIdartifactIdmybatis-spring-boot-starter/artifactIdversion2.2.2/version/dependency/dependencies3.application.yml 配置数据源
数据库名用户名密码驱动是mysql8的因为上面使用了版本仲裁
server:port: 8080
spring:datasource: #配置数据源url: jdbc:mysql://localhost:3306/springboot_mybatis?useSSLfalseuseUnicodetruecharacterEncodingUTF-8username: rootpassword: rootdriver-class-name: com.mysql.cj.jdbc.Driver4.Application.java 编写启动类
package com.sun.springboot.mybatis;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** author 孙显圣* version 1.0*/
SpringBootApplication
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
}
5.测试
package com.sun.springboot.mybatis;import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.jdbc.core.JdbcTemplate;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
SpringBootTest
public class ApplicationTest {//依赖注入Resourceprivate JdbcTemplate jdbcTemplate;Testpublic void t1() {//查看目前数据源System.out.println(jdbcTemplate.getDataSource().getClass());}
} 6.配置类切换druid数据源
package com.sun.springboot.mybatis.config;import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Arrays;/*** author 孙显圣* version 1.0*/
Configuration
public class DruidDataSourceConfig {//注入一个德鲁伊数据源ConfigurationProperties(spring.datasource) //读取yaml配置文件的参数获取数据源配置Beanpublic DataSource dataSource() throws SQLException {DruidDataSource druidDataSource new DruidDataSource();druidDataSource.setFilters(stat, wall); //开启sql监控return druidDataSource;}//配置德鲁伊监控sql功能Beanpublic ServletRegistrationBean statViewServlet() {StatViewServlet statViewServlet new StatViewServlet();ServletRegistrationBeanStatViewServlet registrationBean new ServletRegistrationBean(statViewServlet, /druid/*);//配置登录监控页面用户名和密码registrationBean.addInitParameter(loginUsername, root);registrationBean.addInitParameter(loginPassword, root);return registrationBean;}//配置webStatFilterBeanpublic FilterRegistrationBean webStatFilter() {WebStatFilter webStatFilter new WebStatFilter();FilterRegistrationBeanWebStatFilter filterRegistrationBean new FilterRegistrationBean(webStatFilter);//默认对所有 URL 请求监控filterRegistrationBean.setUrlPatterns(Arrays.asList(/*));//排除 URLfilterRegistrationBean.addInitParameter(exclusions, *.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*);return filterRegistrationBean;}
}7.测试数据源是否成功切换
package com.sun.springboot.mybatis;import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.jdbc.core.JdbcTemplate;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
SpringBootTest
public class ApplicationTest {//依赖注入Resourceprivate JdbcTemplate jdbcTemplate;Testpublic void t1() {//查看目前数据源System.out.println(jdbcTemplate.getDataSource().getClass());}
}4.Mybatis基础配置
1.编写映射表的bean
package com.sun.springboot.mybatis.bean;import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;import java.util.Date;/*** author 孙显圣* version 1.0*/
Data
public class Monster {private Integer id;private Integer age;JsonFormat(patternyyyy-MM-dd HH:mm:ss,timezoneGMT8)private Date birthday;private String email;private String name;private String gender;private Double salary;
}
2.MonsterMapper.java 编写mapper接口
使用注解注入容器
package com.sun.springboot.mybatis.mapper;import com.sun.springboot.mybatis.bean.Monster;
import org.apache.ibatis.annotations.Mapper;/*** author 孙显圣* version 1.0*/
Mapper //将接口注入容器
public interface MonsterMapper {public Monster getMonsterById(Integer id);
}
3.MonsterMapper.xml 编写mapper.xml实现mapper接口
使用namespace指定要实现的接口
?xml version1.0 encodingUTF-8 ?
!DOCTYPE mapperPUBLIC -//mybatis.org//DTD Mapper 3.0//ENhttps://mybatis.org/dtd/mybatis-3-mapper.dtd
!--指定要实现的接口--
mapper namespacecom.sun.springboot.mybatis.mapper.MonsterMapperselect idgetMonsterById resultTypecom.sun.springboot.mybatis.bean.Monster parameterTypeIntegerselect * from monster where id #{id}/select
/mapper4.application.yml 扫描mapper.xml配置文件的位置
扫描类路径下mapper文件夹下的所有文件
mybatis:#指定要扫描的mapper.xmlmapper-locations: classpath:mapper/*.xml5.测试
package com.sun.springboot.mybatis;import com.sun.springboot.mybatis.bean.Monster;
import com.sun.springboot.mybatis.mapper.MonsterMapper;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.jdbc.core.JdbcTemplate;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
SpringBootTest
public class ApplicationTest {//依赖注入Resourceprivate JdbcTemplate jdbcTemplate;//注意这里注入的是MonsterMapper的代理对象Resourceprivate MonsterMapper monsterMapper;Testpublic void t1() {//查看目前数据源System.out.println(jdbcTemplate.getDataSource().getClass());}Testpublic void t2() {//测试mybatisMonster monsterById monsterMapper.getMonsterById(1);System.out.println(monsterById);}
} 5.MyBatis高级配置
1.方式一在application.yml中配置mybatis.config-location指定mybatis-config.xml配置文件的位置
2.方式二直接在application.yml中配置
mybatis:#指定要扫描的mapper.xmlmapper-locations: classpath:mapper/*.xml#配置类型别名包这样只要在这个包下的类型都可以简写type-aliases-package: com/sun/springboot/mybatis/bean#输出日志configuration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl6.继续编写Service层和Controller层
1.MonsterService.java
package com.sun.springboot.mybatis.service;import com.sun.springboot.mybatis.bean.Monster;/*** author 孙显圣* version 1.0*/
public interface MonsterService {public Monster getMonsterById(Integer id);
}
2.MonsterServiceImpl.java
package com.sun.springboot.mybatis.service.Impl;import com.sun.springboot.mybatis.bean.Monster;
import com.sun.springboot.mybatis.mapper.MonsterMapper;
import com.sun.springboot.mybatis.service.MonsterService;
import org.springframework.stereotype.Service;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
Service
public class MonsterServiceImpl implements MonsterService {Resourceprivate MonsterMapper monsterMapper; //返回代理对象Overridepublic Monster getMonsterById(Integer id) {return monsterMapper.getMonsterById(id);}
}3.测试
package com.sun.springboot.mybatis;import com.sun.springboot.mybatis.bean.Monster;
import com.sun.springboot.mybatis.mapper.MonsterMapper;
import com.sun.springboot.mybatis.service.MonsterService;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.jdbc.core.JdbcTemplate;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
SpringBootTest
public class ApplicationTest {//依赖注入Resourceprivate MonsterService monsterService;Testpublic void getMonsterById() {Monster monsterById monsterService.getMonsterById(1);System.out.println(monsterById);}
} 4.MonsterController.java
package com.sun.springboot.mybatis.Controller;import com.sun.springboot.mybatis.bean.Monster;
import com.sun.springboot.mybatis.service.MonsterService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.ResponseBody;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
Controller
public class MonsterController {Resourceprivate MonsterService monsterService;GetMapping(/getMonster/{id}) //路径参数的请求ResponseBody //响应一个jsonpublic Monster getMonsterById(PathVariable(id) Integer id) {Monster monsterById monsterService.getMonsterById(id);return monsterById;}
}
5.测试 6.解决时间问题 7.完整文件目录 2.整合MyBatis-Plus
1.MyBatis-Plus基本介绍 2.数据库表设计
CREATE DATABASE springboot_mybatisplus;USE springboot_mybatisplus;CREATE TABLE monster (
id INT NOT NULL AUTO_INCREMENT,
age INT NOT NULL,
birthday DATE DEFAULT NULL,
email VARCHAR(255) DEFAULT NULL,
gender CHAR(1) DEFAULT NULL,
name VARCHAR(255) DEFAULT NULL,
salary DOUBLE NOT NULL,
PRIMARY KEY (id)
);
SELECT * FROM monster;
INSERT INTO monster VALUES(NULL, 20, 2000-11-11, xzjsohu.com, 男, 蝎 子 精 ,
15000.88);
INSERT INTO monster VALUES(NULL, 10, 2011-11-11, ytjsohu.com, 女, 玉 兔 精 ,
18000.88);3.数据库环境配置
1.创建maven项目 2.pom.xml 导入依赖 !--导入springboot父工程--parentartifactIdspring-boot-starter-parent/artifactIdgroupIdorg.springframework.boot/groupIdversion2.5.3/version/parent!--引入相关依赖--dependencies!--常规依赖--!--web场景启动器--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependency!--lombok--dependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdoptionaltrue/optional/dependency!--引入测试场景启动器--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactIdscopetest/scope/dependency!--配置处理器--dependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-configuration-processor/artifactIdoptionaltrue/optional/dependency!--数据库配置--!--mysql依赖使用版本仲裁--dependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdscoperuntime/scope/dependency!-- 引入 druid 依赖 --dependencygroupIdcom.alibaba/groupIdartifactIddruid/artifactIdversion1.1.17/version/dependency!--引入MyBatis-Plus场景启动器会自动引入jdbc和MyBatis--dependencygroupIdcom.baomidou/groupIdartifactIdmybatis-plus-boot-starter/artifactIdversion3.4.3/version/dependency/dependencies3.application.yml 配置数据源
数据库名称用户名密码
server:port: 8080
spring:datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql://localhost:3306/springboot_mybatisplus?useSSLfalseuseUnicodetruecharacterEncodingUTF-8username: rootpassword: root
4.DruidDataSourceConfig.java 配置类切换druid数据源
package com.sun.springboot.mybatisplus.config;import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Arrays;/*** author 孙显圣* version 1.0*/
Configuration
public class DruidDataSourceConfig {//注入一个德鲁伊数据源ConfigurationProperties(spring.datasource) //读取yaml配置文件的参数获取数据源配置Beanpublic DataSource dataSource() throws SQLException {DruidDataSource druidDataSource new DruidDataSource();druidDataSource.setFilters(stat, wall); //开启sql监控return druidDataSource;}//配置德鲁伊监控sql功能Beanpublic ServletRegistrationBean statViewServlet() {StatViewServlet statViewServlet new StatViewServlet();ServletRegistrationBeanStatViewServlet registrationBean new ServletRegistrationBean(statViewServlet, /druid/*);//配置登录监控页面用户名和密码registrationBean.addInitParameter(loginUsername, root);registrationBean.addInitParameter(loginPassword, root);return registrationBean;}//配置webStatFilterBeanpublic FilterRegistrationBean webStatFilter() {WebStatFilter webStatFilter new WebStatFilter();FilterRegistrationBeanWebStatFilter filterRegistrationBean new FilterRegistrationBean(webStatFilter);//默认对所有 URL 请求监控filterRegistrationBean.setUrlPatterns(Arrays.asList(/*));//排除 URLfilterRegistrationBean.addInitParameter(exclusions, *.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*);return filterRegistrationBean;}
}5.编写启动类Application.java测试运行
package com.sun.springboot.mybatisplus;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;/*** author 孙显圣* version 1.0*/
SpringBootApplication
public class Application {public static void main(String[] args) {SpringApplication.run(Application.class, args);}
} 4.MyBatis-Plus基础配置
1.编写映射表的bean
package com.sun.springboot.mybatisplus.bean;import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.Data;import java.util.Date;/*** author 孙显圣* version 1.0*/
Data
public class Monster {private Integer id;private Integer age;JsonFormat(pattern yyyy-MM-dd HH:mm:ss, timezone GMT8)private Date birthday;private String email;private String name;private String gender;private Double salary;
}2.MonsterMapper.java 编写Mapper接口
package com.sun.springboot.mybatisplus.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.sun.springboot.mybatisplus.bean.Monster;
import org.apache.ibatis.annotations.Mapper;/*** author 孙显圣* version 1.0*/
//直接继承BaseMapper接口
Mapper //注入容器
public interface MonsterMapper extends BaseMapperMonster {//如果提供的方法不够用再自定义方法
}
3.测试接口方法使用
package com.sun.springboot.mybatisplus;import com.sun.springboot.mybatisplus.bean.Monster;
import com.sun.springboot.mybatisplus.mapper.MonsterMapper;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
SpringBootTest
public class MonsterMapperTest {//注入针对Mapper接口的代理对象Resourceprivate MonsterMapper monsterMapper;Testpublic void t1() {Monster monster monsterMapper.selectById(1);System.out.println(monster);}
} 5.MyBatis-Plus高级配置
application.yml 进行配置
#进行mybatis-plus配置
mybatis-plus:configuration:log-impl: org.apache.ibatis.logging.stdout.StdOutImpl6.继续编写Service层和Controller层
1.MonsterService.java
package com.sun.springboot.mybatisplus.service.Impl;import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sun.springboot.mybatisplus.bean.Monster;
import com.sun.springboot.mybatisplus.mapper.MonsterMapper;
import com.sun.springboot.mybatisplus.service.MonsterService;
import org.springframework.stereotype.Service;/*** 这里* author 孙显圣* version 1.0*/
Service
public class MonsterServiceImpl extends ServiceImplMonsterMapper, Monster implements MonsterService {//自定义方法实现
}
2.MonsterServiceImpl.java
package com.sun.springboot.mybatisplus.service.Impl;import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sun.springboot.mybatisplus.bean.Monster;
import com.sun.springboot.mybatisplus.mapper.MonsterMapper;
import com.sun.springboot.mybatisplus.service.MonsterService;
import org.springframework.stereotype.Service;/*** 这里* author 孙显圣* version 1.0*/
Service
public class MonsterServiceImpl extends ServiceImplMonsterMapper, Monster implements MonsterService {//自定义方法实现
}
3.测试
package com.sun.springboot.mybatisplus;import com.sun.springboot.mybatisplus.bean.Monster;
import com.sun.springboot.mybatisplus.mapper.MonsterMapper;
import com.sun.springboot.mybatisplus.service.MonsterService;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
SpringBootTest
public class MonsterServiceTest {Resourceprivate MonsterService monsterService;Testpublic void t1() {Monster byId monsterService.getById(2);System.out.println(byId);}
} 4.细节说明
简单来说就是MonsterServiceImpl只需要实现MonsterService接口的方法可以调用IService接口的方法,也可以调用MonsterService接口的方法 5.MonsterController.java
package com.sun.springboot.mybatisplus.controller;import com.sun.springboot.mybatisplus.bean.Monster;
import com.sun.springboot.mybatisplus.service.MonsterService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.ResponseBody;import javax.annotation.Resource;/*** author 孙显圣* version 1.0*/
Controller
public class MonsterController {Resource//注入的是MonsterServiceImpl的bean对象可以直接调用IService接口的方法private MonsterService monsterService;GetMapping(/getMonster/{id})ResponseBodypublic Monster getMonsterById(PathVariable(id) Integer id) {Monster byId monsterService.getById(id);return byId;}
} 7.细节说明
1.MapperScan 扫描包下的所有Mapper
启动类配置注解 2.TableName bean的类名与表名不一致时使用 3.MyBatis引入了哪些依赖 8.MyBatisX快速开发
1.安装插件 2.使用方式
1.挑一个带小鸟的方法 2.直接alt Enter 3.生成sql语句 4.查看生成的方法 5.点击左边的小鸟就可以直接跳转到指定方法或者xml 9.完整文件目录 10.MyBatis-Plus小结
