From 0d050011c5df727c12ca1fbf65095648527a7504 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=B5=B5=E6=95=8F?= <3234934487@qq.com>
Date: Tue, 19 Dec 2023 19:44:17 +0800
Subject: [PATCH 1/2] zy
---
.../20231219 SSM\346\241\206\346\236\266.md" | 99 +++++++++++++++++++
1 file changed, 99 insertions(+)
create mode 100644 "56 \350\265\265\346\225\217/20231219 SSM\346\241\206\346\236\266.md"
diff --git "a/56 \350\265\265\346\225\217/20231219 SSM\346\241\206\346\236\266.md" "b/56 \350\265\265\346\225\217/20231219 SSM\346\241\206\346\236\266.md"
new file mode 100644
index 0000000..4935d81
--- /dev/null
+++ "b/56 \350\265\265\346\225\217/20231219 SSM\346\241\206\346\236\266.md"
@@ -0,0 +1,99 @@
+## 笔记
+
+### Maven
+
+~~~ md
+Maven是专门用于管理和构建Java项目的工具,它的主要功能有:
+
+提供了一套标准化的项目结构
+
+提供了一套标准化的构建流程(编译,测试,打包,发布……)
+
+提供了一套依赖管理机制
+
+
+仓库分类:
+本地仓库:自己计算机上的一个目录
+
+中央仓库:由Maven团队维护的全球唯一的仓库
+
+地址: https://repo1.maven.org/maven2/
+
+远程仓库(私服):一般由公司团队搭建的私有仓库,国内镜像也是远程仓库的一种
+当项目中使用坐标引入对应依赖jar包后,首先会查找本地仓库中是否有对应的jar
+包:
+如果有,则在项目直接引用;
+
+如果没有,则去中央仓库中下载对应的jar包到本地仓库。
+
+
+Maven 坐标详解
+
+什么是坐标?
+Maven 中的坐标是==资源的唯一标识==
+使用坐标来定义项目或引入项目中需要的依赖
+
+Maven 坐标主要组成
+groupId:定义当前Maven项目隶属组织名称(通常是域名反写,例如:
+com.mdd)
+artifactId:定义当前Maven项目名称(通常是模块名称,例如 order-service、
+goods-service)
+version:定义当前项目版本号
+
+
+使用坐标引入jar包
+使用坐标引入jar包的步骤:
+
+在项目的 pom.xml 中编写 标签
+在 标签中 使用 引入坐标
+定义坐标的 groupId,artifactId,version
+点击刷新按钮,使坐标生效
+
+
+依赖范围
+通过设置坐标的依赖范围(scope),可以设置 对应jar包的作用范围:编译环境、测试
+环境、运行环境。
+如下图所示给 junit 依赖通过 scope 标签指定依赖的作用范围。 那么这个依赖就
+只能作用在测试环境,其他环境下不能使用。
+
+compile :作用于编译环境、测试环境、运行环境。
+test : 作用于测试环境。典型的就是Junit坐标,以后使用Junit时,都会将scope
+指定为该值
+provided :作用于编译环境、测试环境。我们后面会学习 servlet-api ,在使
+用它时,必须将 scope 设置为该值,不然运行时就会报错
+runtime : 作用于测试环境、运行环境。jdbc驱动一般将 scope 设置为该值,
+当然不设置也没有任何问题
+注意:
+如果引入坐标不指定 scope 标签时,默认就是 compile 值。以后大部分
+jar包都是使用默认值。
+~~~
+
+## 作业
+
+~~~ java
+
+
+ junit
+ junit
+ 4.13.2
+ test
+
+
+~~~
+
+~~~ java
+import org.junit.Test;
+
+public class APP {
+ @Test
+ public void test01(){
+ System.out.println(999);
+ }
+ @Test
+ public void test02(){
+ System.out.println("吃饭了吗");
+ }
+}
+
+~~~
+
--
Gitee
From 410c0d80091864511cbf12e806b97b6203c2e4c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=B5=B5=E6=95=8F?= <3234934487@qq.com>
Date: Tue, 26 Dec 2023 07:32:10 +0800
Subject: [PATCH 2/2] zy
---
...36\345\210\240\346\224\271\346\237\245.md" | 342 ++++++++++++++++++
1 file changed, 342 insertions(+)
create mode 100644 "56 \350\265\265\346\225\217/20231225 mybatis\345\242\236\345\210\240\346\224\271\346\237\245.md"
diff --git "a/56 \350\265\265\346\225\217/20231225 mybatis\345\242\236\345\210\240\346\224\271\346\237\245.md" "b/56 \350\265\265\346\225\217/20231225 mybatis\345\242\236\345\210\240\346\224\271\346\237\245.md"
new file mode 100644
index 0000000..075c853
--- /dev/null
+++ "b/56 \350\265\265\346\225\217/20231225 mybatis\345\242\236\345\210\240\346\224\271\346\237\245.md"
@@ -0,0 +1,342 @@
+## 作业
+
+~~~ java
+package com.dsg;
+
+import com.dsg.mapper.BrandMapper;
+import com.dsg.pojo.Brand;
+import org.apache.ibatis.io.Resources;
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
+import org.apache.ibatis.session.SqlSessionFactoryBuilder;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class MybatistTest {
+ // 查询所有
+ @Test
+ public void test01() throws IOException {
+// 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+
+ SqlSession sqlSession = sqlSessionFactory.openSession();
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ List brands = mapper.selectAll();
+ System.out.println(brands);
+ sqlSession.close();
+ }
+ // 通过id进行查询
+ @Test
+ public void findById() throws IOException {
+ // 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+ SqlSession sqlSession = sqlSessionFactory.openSession();
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ Brand brand = mapper.selectById(1);
+ System.out.println(brand);
+ sqlSession.close();
+ }
+ // 多条件查询,散装参数
+ @Test
+ public void findByCondition() throws IOException {
+ // 定义参数
+ int status = 1;
+ String companyName = "华为";
+ String brandName = "华为";
+
+ companyName = "%" + companyName + "%";
+ brandName = "%" + brandName + "%";
+
+
+ // 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+ SqlSession sqlSession = sqlSessionFactory.openSession();
+ // 获取代理
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ // 执行sql
+ List brands = mapper.selectByCondition(status, companyName, brandName);
+ System.out.println(brands);
+
+ sqlSession.close();
+ }
+ // 多条件查询,用类做参数
+ @Test
+ public void findByCondition01() throws IOException {
+ // 定义参数
+ int status = 1;
+ String companyName = "华为";
+ String brandName = "华为";
+
+ companyName = "%" + companyName + "%";
+ brandName = "%" + brandName + "%";
+
+ Brand brand = new Brand();
+ brand.setBrandName(brandName);
+ brand.setCompanyName(companyName);
+ brand.setStatus(status);
+
+ // 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+ SqlSession sqlSession = sqlSessionFactory.openSession();
+ // 获取代理
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ // 执行sql
+ List brands = mapper.selectByCondition(brand);
+ System.out.println(brands);
+
+ sqlSession.close();
+ }
+ // 多条件查询,用map方法做参数
+ @Test
+ public void findByCondition02() throws IOException {
+ // 定义参数
+ int status = 1;
+ String companyName = "华为";
+ String brandName = "华为";
+
+ companyName = "%" + companyName + "%";
+ brandName = "%" + brandName + "%";
+
+// Brand brand = new Brand();
+// brand.setBrandName(brandName);
+// brand.setCompanyName(companyName);
+// brand.setStatus(status);
+
+ Map map = new HashMap();
+ map.put("status",status);
+ map.put("companyName",companyName);
+ map.put("brandName",brandName);
+
+ // 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+ SqlSession sqlSession = sqlSessionFactory.openSession();
+ // 获取代理
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ // 执行sql
+ List brands = mapper.selectByCondition(map);
+ System.out.println(brands);
+
+ sqlSession.close();
+ }
+ // 添加
+ @Test
+ public void insert() throws IOException {
+ // 定义参数
+ int status = 1;
+ String companyName = "抖营";
+ String brandName = "抖营";
+ String description = "多看大美女,有益身心健康";
+ int ordered = 100;
+
+
+ Brand brand = new Brand();
+ brand.setBrandName(brandName);
+ brand.setCompanyName(companyName);
+ brand.setStatus(status);
+ brand.setDescription(description);
+ brand.setOrdered(ordered);
+
+
+ // 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+ SqlSession sqlSession = sqlSessionFactory.openSession(true);
+ // 获取代理
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ // 执行sql
+ mapper.insert(brand);
+ // 手动提交事务
+// sqlSession.commit();
+ System.out.println(brand.getId());
+ // 释放资源
+ sqlSession.close();
+ }
+ // 修改
+ @Test
+ public void upData() throws IOException {
+ // 定义参数
+ int status = 1;
+ String companyName = "火山短视频";
+ String brandName = "火山短视频";
+ String description = "多看大帅哥,有益身心健康";
+ int ordered = 50;
+ int id = 6;
+
+
+ Brand brand = new Brand();
+ brand.setBrandName(brandName);
+ brand.setCompanyName(companyName);
+ brand.setStatus(status);
+ brand.setDescription(description);
+ brand.setOrdered(ordered);
+ brand.setId(id);
+
+
+ // 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+ SqlSession sqlSession = sqlSessionFactory.openSession(true);
+ // 获取代理
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ // 执行sql
+ mapper.upData(brand);
+ // 手动提交事务
+// sqlSession.commit();
+ System.out.println(brand.getId());
+ // 释放资源
+ sqlSession.close();
+ }
+ // 删除
+ @Test
+ public void delete() throws IOException {
+ int[] ids = {6};
+
+ // 1 加载mybatis的核心配置文件
+ String resource = "mybatis-confing.xml";
+ InputStream inputStream = Resources.getResourceAsStream(resource);
+ SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
+ System.out.println(111);
+
+ SqlSession sqlSession = sqlSessionFactory.openSession(true);
+ // 获取代理
+ BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+ // 执行sql
+ mapper.delete(ids);
+ // 手动提交事务
+// sqlSession.commit();
+ System.out.println(ids);
+ // 释放资源
+ sqlSession.close();
+ }
+}
+
+~~~
+
+~~~ java
+package com.dsg.mapper;
+
+import com.dsg.pojo.Brand;
+import org.apache.ibatis.annotations.Param;
+
+import java.util.List;
+import java.util.Map;
+
+public interface BrandMapper {
+ List selectAll();
+
+ Brand selectById(int id);
+
+ // 散装参数
+ List selectByCondition(
+ @Param("status") int status,
+ @Param("companyName") String companyName,
+ @Param("brandName") String brandName
+ );
+
+ // 用brand对象做参数
+ List selectByCondition(Brand brand);
+
+ // 使用map方法做参数
+ List selectByCondition(Map map);
+
+ // 添加
+ void insert(Brand brand);
+
+ // 修改
+ void upData(Brand brand);
+
+ // 删除
+ void delete(int[] ids);
+}
+
+~~~
+
+~~~ java
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ insert into tb_brand (brand_name,company_name,ordered,description,status)
+ values (#{brandName}, #{companyName}, #{ordered}, #{description}, #{status});
+
+
+
+ update tb_brand
+ set
+ status = #{status},
+ brand_name = #{brandName},
+ company_name = #{companyName},
+ ordered = #{ordered},
+ description = #{description}
+ where id = #{id};
+
+
+
+ delete
+ from tb_brand
+ where id in (
+
+ #{id}
+
+
+ );
+
+
+~~~
+
--
Gitee