5/19 19:08

.idea/compiler.xml

@@ -7,6 +7,7 @@
         <sourceOutputDir name="target/generated-sources/annotations" />
         <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
         <outputRelativeToContentRoot value="true" />
+        <module name="spring519" />
         <module name="mybatis516" />
         <module name="demo516" />
         <module name="demo515" />

.idea/encodings.xml

@@ -11,5 +11,7 @@
     <file url="file://$PROJECT_DIR$/mybatis517-518/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/mybatis519/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/mybatis519/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/spring519/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/spring519/src/main/resources" charset="UTF-8" />
   </component>
 </project>

.idea/misc.xml

@@ -13,6 +13,7 @@
         <option value="$PROJECT_DIR$/mybatis517/pom.xml" />
         <option value="$PROJECT_DIR$/mybatis517-518/pom.xml" />
         <option value="$PROJECT_DIR$/mybatis519/pom.xml" />
+        <option value="$PROJECT_DIR$/spring519/pom.xml" />
       </list>
     </option>
   </component>

mybatis519/src/main/java/cn/czyx007/mapper/BrandMapper.java

@@ -1,6 +1,7 @@
 package cn.czyx007.mapper;
 
 import cn.czyx007.bean.Brand;
+import org.apache.ibatis.annotations.CacheNamespace;
 import org.apache.ibatis.annotations.Select;
 import org.apache.ibatis.annotations.Update;
 
@@ -10,6 +11,8 @@ import java.util.List;
  * @author : 张宇轩
  * @createTime : 2023/5/17 - 14:16
  */
+//开启二级缓存
+@CacheNamespace
 public interface BrandMapper {
     //查询所有品牌
     @Select("select * from person_info.tb_brand")

mybatis519/src/main/resources/cn/czyx007/mapper/BrandMapper.xml

@@ -5,4 +5,7 @@
 
 <mapper namespace="cn.czyx007.mapper.BrandMapper">
 
+<!--    开启二级缓存,注解与此处二选一 -->
+<!--    <cache/>-->
+
 </mapper>

mybatis519/src/main/resources/mybatis-config.xml

@@ -20,6 +20,7 @@
         <!--将下划线映射为驼峰-->
         <setting name="mapUnderscoreToCamelCase" value="true"/>
         <setting name="lazyLoadingEnabled" value="true"/>
+        <setting name="cacheEnabled" value="true"/>
     </settings>
 
     <typeAliases>
@@ -28,6 +29,7 @@
 
     <plugins>
         <plugin interceptor="com.github.pagehelper.PageInterceptor">
+            <!-- 启用合理化，防止第一页再点击上一页，最后一页再点击下一页 -->
             <property name="reasonable" value="true"/>
         </plugin>
     </plugins>

mybatis519/src/test/java/TestComputers.java

@@ -48,6 +48,7 @@ public class TestComputers {
         BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
         mapper.getBrandAll().forEach(System.out::println);
 
+        //一级缓存，SqlSession级别
         //更新操作会导致缓存失效
 //        Brand brand = new Brand();
 //        brand.setId(1);
@@ -60,4 +61,42 @@ public class TestComputers {
         BrandMapper mapper1 = sqlSession.getMapper(BrandMapper.class);
         mapper1.getBrandAll().forEach(System.out::println);
     }
+
+    //如果不是同一个SqlSession，一级缓存失效
+    //如果不是同一个SqlSession，二级缓存有效，mapper级别
+    @Test
+    public void test04(){
+        //第一次
+        SqlSession sqlSession = SqlSessionUtil.getSqlSession();
+        BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+        mapper.getBrandAll().forEach(System.out::println);
+        //SqlSession关闭，缓存数据
+        sqlSession.close();
+        //第二次
+        System.out.println("+===========");
+        SqlSession sqlSession1 = SqlSessionUtil.getSqlSession();
+        BrandMapper mapper1 = sqlSession1.getMapper(BrandMapper.class);
+        mapper1.getBrandAll().forEach(System.out::println);
+    }
+
+    @Test
+    public void test05(){
+        //第一次
+        SqlSession sqlSession = SqlSessionUtil.getSqlSession();
+        BrandMapper mapper = sqlSession.getMapper(BrandMapper.class);
+        mapper.getBrandAll().forEach(System.out::println);
+        //更新操作
+        Brand brand = new Brand();
+        brand.setId(88);
+        brand.setBrandName("小花88");
+        mapper.updateBrandById(brand);
+        //SqlSession关闭，缓存数据
+        sqlSession.close();
+        //第二次
+        System.out.println("+===========");
+        SqlSession sqlSession1 = SqlSessionUtil.getSqlSession();
+        BrandMapper mapper1 = sqlSession1.getMapper(BrandMapper.class);
+        mapper1.getBrandAll().forEach(System.out::println);
+    }
+
 }

spring519/pom.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>cn.czyx007</groupId>
+    <artifactId>spring519</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.20</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.2</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework</groupId>
+            <artifactId>spring-context</artifactId>
+            <version>5.3.23</version>
+        </dependency>
+    </dependencies>
+
+</project>

spring519/src/main/java/cn/czyx007/bean/Dog.java

@@ -0,0 +1,22 @@
+package cn.czyx007.bean;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+/**
+ * @author : 张宇轩
+ * @createTime : 2023/5/19 - 15:59
+ */
+@Data
+//@NoArgsConstructor
+@AllArgsConstructor
+public class Dog {
+    public Dog() {
+        System.out.println("狗出生了");
+    }
+
+    private String name;
+    public void eat(){
+        System.out.println(name + "的狗吃骨头...");
+    }
+}

spring519/src/main/resources/spring.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
+    <bean id="dog" class="cn.czyx007.bean.Dog">
+<!--        依赖注入，对 对象属性赋值 -->
+        <property name="name" value="xxx"/>
+    </bean>
+
+</beans>

spring519/src/test/java/TestDemo.java

@@ -0,0 +1,24 @@
+import cn.czyx007.bean.Dog;
+import org.junit.Test;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.support.ClassPathXmlApplicationContext;
+
+/**
+ * @author : 张宇轩
+ * @createTime : 2023/5/19 - 16:00
+ */
+public class TestDemo {
+    @Test
+    public void test1(){
+        Dog dog = new Dog("xxx");
+        dog.eat();
+    }
+
+    @Test
+    public void test2(){
+        ApplicationContext app = new ClassPathXmlApplicationContext("spring.xml");
+        Dog dog = app.getBean("dog", Dog.class);
+//        dog.setName("xxx");
+        dog.eat();
+    }
+}