Spring学习笔记 (12)

aop:aspectj-autoproxy：说明

通过aop命名空间的<aop:aspectj-autoproxy />声明自动为spring容器中那些配置@aspectJ切面的bean创建代理，织入切面。当然，spring 在内部依旧采用AnnotationAwareAspectJAutoProxyCreator进行自动代理的创建工作，但具体实现的细节已经被<aop:aspectj-autoproxy />隐藏起来了 <aop:aspectj-autoproxy />有一个proxy-target-class属性，默认为false，表示使用jdk动态代理织入增强，当配为<aop:aspectj-autoproxy poxy-target-class="true"/>时，表示使用CGLib动态代理技术织入增强。不过即使proxy-target-class设置为false，如果目标类没有声明接口，则spring将自动使用CGLib动态代理。 9、整合MyBatis 9.1、步骤

1、导入相关jar包

junit

<dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency>

mybatis

<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency>

mysql-connector-java

<dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency>

spring相关

<dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.10.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.10.RELEASE</version> </dependency>

aspectJ AOP 织入器

<!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.4</version> </dependency>

mybatis-spring整合包 【重点】

<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency>

配置Maven静态资源过滤问题！

<build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>true</filtering> </resource> </resources> </build>

编写配置文件

代码实现

9.2、回忆MyBatis

编写pojo实体类

package com.kuang.pojo; public class User { private int id; //id private String name; //姓名 private String pwd; //密码 }

实现mybatis的配置文件

<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <typeAliases> <package/> </typeAliases> <environments default="development"> <environment> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property value="com.mysql.jdbc.Driver"/> <property value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&amp;useUnicode=true&amp;characterEncoding=utf8"/> <property value="root"/> <property value="123456"/> </dataSource> </environment> </environments> <mappers> <package/> </mappers> </configuration>

UserDao接口编写

public interface UserMapper { public List<User> selectUser(); }

接口对应的Mapper映射文件

<?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.kuang.dao.UserMapper"> <select resultType="User"> select * from user </select> </mapper>

测试类

@Test public void selectUser() throws IOException { String resource = "mybatis-config.xml"; InputStream inputStream = Resources.getResourceAsStream(resource); SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); SqlSession sqlSession = sqlSessionFactory.openSession(); UserMapper mapper = sqlSession.getMapper(UserMapper.class); List<User> userList = mapper.selectUser(); for (User user: userList){ System.out.println(user); } sqlSession.close(); } 9.3、MyBatis-Spring学习

引入Spring之前需要了解mybatis-spring包中的一些重要类；