Spring(容器框架)
官网:https://spring.io/projects/spring-framework
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导入spring的包——-Spring Web MVC
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>6.0.11</version>
</dependency> -
优点
spring是容器框架用于配置bean,并维护bean之间关系的框架
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bean是java中的任何一种对象,javabean/service/action/数据源/dao
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ioc控制反转:inverse of control
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aop面向切面
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支持事务
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di依赖注入:dependency injection
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总结:Spring就是一个轻量级的控制反转(IOC)和面向切面(AOP)编程的框架
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组成
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扩展
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Spring Boot
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一个快速开发的脚手架
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基于SpringBoot可以快速的开发单个微服务
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约定大于配置
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Spring Cloud
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SpringCloud是基于SpringBoot实现的
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IOC
HelloSpring
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导包
<?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>com.lsq</groupId>
<artifactId>Spring-Study</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<modules>
<module>spring-01</module>
</modules>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.15.RELEASE</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource><!--源-->
<directory>src/main/java</directory><!--你的文件所在路径-->
<includes><!--包含哪些后缀名文件-->
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
</project> -
创建pojo对象
package com.lsq.pojo;
public class Hello {
private String str;
public String getStr() {
return str;
}
public void setStr(String str) {
this.str = str;
}
@Override
public String toString() {
return "Hello{" +
"str='" + str + '\'' +
'}';
}
} -
编写配置文件
<?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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<!--使用Spring来创建对象,在Spring中这些都称为Bean
类型 变量名 = new 类型();
bean = 对象 new Hello();
id = 变量名
class = new 的对象
property相当于给对象中的属性设置一个值
ref:引用Spring容器中创建好的对象
value:具体的值,基本数据类型
-->
<bean id="hello" class="com.lsq.pojo.Hello">
<property name="str" value="Spring"/>
</bean>
</beans> -
测试
import com.lsq.pojo.Hello;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyTest {
public static void main(String[] args) {
//获取Spring的上下文对象
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
//我们的对象现在都在Spring中管理了,我们要使用直接去里面取出来就可以
Hello hello = (Hello)context.getBean("hello");
System.out.println(hello.toString());
}
}
IOC创建对象的方式
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使用无参构造创建对象,默认!
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假设我们要使用有参构造创建对象
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下标赋值
<bean id="hello" class="com.lsq.pojo.Hello">
<property name="str" value="Spring"/>
</bean> -
类型
<!--第二种:通过类型创建,不建议使用-->
<bean id="user" class="com.lsq.pojo.User">
<constructor-arg index="0" type="java.lang.String" value="七七"/>
</bean> -
参数名
<!--第三种:通过参数名来设置-->
<bean id="user" class="com.lsq.pojo.User">
<constructor-arg name="name" value="罐罐"/>
</bean>
总结:在配置文件加载的时候,容器中管理的对象就已经初始化了
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Spring配置
1. 别名
<!--如果配置了别名,也可以用别名获取到这个对象-->
<alias name="user" alias="user2"/>
2. Bean的配置
<!--
id:bean的唯一标识符,也就是相当于我们的对象名
class:bean对象所对应的全限定名:包名+类型
name:也是别名,而且name可以同时取多个别名
-->
3. import
这个import,一般用于团队开发使用,他可以将多个配置文件,导入合并为一个
假设,现在项目中有多个人开发,这多个人负责不同的类开发,不同的类需要注册在不同的bean中,我们可以利用import将所有人的beans.xml合并为一个总的,使用的时候直接使用总的配置就可以了
依赖注入
构造器注入
Set方式注入【重点】
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依赖注入:Set注入
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依赖:bean对象的创建依赖于容器
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注入:bean对象中的所有属性,由容器来注入
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【环境搭建】
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复杂类型
package com.lsq.pojo;
public class Address {
private String address;
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
} -
真实测试对象
public class Student {
private String name;
private Address address;
private String[] books;
private List<String> hobbys;
private Map<String ,String> card;
private Set<String> games;
private String wife;
private Properties info;
} -
beans.xml
<?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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="student" class="com.lsq.pojo.Student">
<!--第一种:普通值注入,value-->
<property name="name" value="文姬"/>
</bean>
</beans> -
测试类
import com.lsq.pojo.Student;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyTest {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
Student student = (Student)context.getBean("student");
System.out.println(student.getAddress());
}
} -
完善注入信息
<?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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="address" class="com.lsq.pojo.Address">
<property name="address" value="江西"/>
</bean>
<bean id="student" class="com.lsq.pojo.Student">
<!--第一种:普通值注入,value-->
<property name="name" value="文姬"/>
<!--第二种:bean注入,ref-->
<property name="address" ref="address"/>
<!--数组注入-->
<property name="books">
<array>
<value>红楼梦</value>
<value>水浒传</value>
<value>西游记</value>
<value>三国演义</value>
</array>
</property>
<!--list-->
<property name="hobbys">
<list>
<value>听歌</value>
<value>跳舞</value>
<value>敲代码</value>
<value>看电影</value>
</list>
</property>
<!--map-->
<property name="card">
<map>
<entry key="身份证" value="123456"/>
<entry key="银行卡" value="123454567"/>
</map>
</property>
<!--set-->
<property name="games">
<set>
<value>LOL</value>
<value>王者</value>
<value>光遇</value>
</set>
</property>
<!--null-->
<property name="wife">
<null/>
</property>
<!--Properties-->
<property name="info">
<props>
<prop key="学号">170706052</prop>
<prop key="姓名">刘文姬</prop>
<prop key="性别">女</prop>
</props>
</property>
</bean>
</beans>
拓展方式注入
我们可以使用p命名空间和c命名空间进行注入
官方解释
使用
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">
<!--p命名空间注入,可以直接注入属性的值:property-->
<bean id="user" class="com.lsq.pojo.User" p:name="文姬" p:age="23"/>
<!--c命名空间注入,通过构造器注入:constructor-args-->
<bean id="user2" class="com.lsq.pojo.User" c:age="18" c:name="雅雅"/>
</beans>
测试
import com.lsq.pojo.Student;
import com.lsq.pojo.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyTest {
@Test
public void test1(){
ApplicationContext context = new ClassPathXmlApplicationContext("userbeans.xml");
User user = (User)context.getBean("user2");
System.out.println(user);
}
}
注意点:p命名和c命名空间不能直接使用,需要导入xml约束
xmlns:p="http://www.springframework.org/schema/p"
xmlns:c="http://www.springframework.org/schema/c"
bean的作用域
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单例模式(Spring默认机制)
<bean id="user2" class="com.lsq.pojo.User"scope="singleton"/>
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原型模式:每次从容器中get的时候,都会产生一个新对象
<bean id="user2" class="com.lsq.pojo.User" scope="prototype"/>
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其余的request、session、application这些个只能在web开发中使用到
Bean的自动装配
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自动装配是Spring满足bean依赖一种方式
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Spring会在上下文中自动寻找,并自动给bean装配属性
在Spring中有三种装配的方式
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在xml中显示的配置
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在java中显示配置
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隐式的自动装配bean【重要】
ByName自动装配
<!--
byName:会自动在容器上下文中查找,和自己对象set方法后面的值对应的beanid
-->
<bean id="person" class="com.lsq.pojo.Person" autowire="byName">
<property name="name" value="雅雅"/>
</bean>
ByType自动装配
<bean class="com.lsq.pojo.Cat"/>
<bean class="com.lsq.pojo.Dog"/>
<!--
byType:会自动在容器上下文中查找,和自己对象属性类型相同的bean
-->
<bean id="person" class="com.lsq.pojo.Person" autowire="byType">
<property name="name" value="雅雅"/>
</bean>
使用注解实现自动装配
要使用注解须知
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导入约束 :context约束
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配置注解的支持 context:annotation-config/
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<context:annotation-config/>
</beans>
@Autowired
直接在属性上使用即可!也可以在set方式上使用
使用Autowired我们可以不用编写Set方法,前提是你自动装配的属性在IOC(Spring)容器中存在,且符合名字byName
科普:
@Nullable 字段标记了这个注解,说明这个字段可以为null;
public @interface Autowired{
boolean requried() default true;
}
测试代码:
public class Person {
//如果显示定义了Autowired的required属性为false,说明这个对象可以为null,否则不允许为空
@Autowired(required = false)
private Cat cat;
@Autowired
private Dog dog;
private String name;
}
如果 @Autowired自动装配的环境比较复杂,自动装配无法通过一个注解【@Autowired】完成的时候、我们可以使用@Qualifer(value=“xxx”)去配置@Autowired的使用,指定一个唯一的bean对象注入
@Resource
public class Person {
@Resource(name = "cat")
private Cat cat;
private Dog dog;
private String name;
}
总结:
@Autowired和@Resource
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都是用来自动装配的,都可以放在属性字段上
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@Autowired通过byName的方式实现,而且必须要求这个对象存在
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@Resource默认通过byName的方式实现,如果找不到名字,则通过byType实现,如果两个都找不到的情况下,就报错
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执行顺序不同
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@Autowired通过byType的方式实现
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@Resource默认通过byName的方式实现
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使用注解开发
在Spring4之后,要使用注解开发,必须要保证aop的包导入了
使用注解需要导入context约束
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.lsq.pojo"/>
<context:annotation-config/>
</beans>
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bean
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属性如何注入
@Component
public class User {
public String name;
//相当于<property name="name" value="hahahah"/>
@Value("hahahah")
public void setName(String name) {
this.name = name;
}
} -
衍生的注解
@Component有几个衍生注解,我们在web开发中会按照mvc三层架构分层
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dao 【@Repository】
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service 【@Service】
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controller 【@Controller】
-
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自动装配
@Autowired:自动装配通过类型,名字
如果@Autowired不能唯一自动装配上属性,则需要通过@Qualifier(value="xxx")
@Nullable 字段标记了这个注解,说明这个字段可以为null
@Resource 自动装配通过名字,类型 -
作用域
@Component
@Scope("singlton")
public class User {
public String name;
//相当于<property name="name" value="hahahah"/>
@Value("hahahah")
public void setName(String name) {
this.name = name;
}
} -
小结
使用Java的方式配置Spring
配置类
package com.lsq.config;
import com.lsq.pojo.User;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
//这个也会被Spring容器托管,注册到容器中,因为他本来就是一个@Component
//@Configuration代表这是一个配置类,就和我们之前的备beans.xml一样
@Configuration
@ComponentScan("com.lsq.pojo")
@Import(MyConfig2.class)
public class MyConfig {
//注册一个bean,就相当于我们之前写的一个bean标签
//这个方法的名字,就相当于bean标签的id属性
//这个方法的返回值,就相当于bean标签中的class属性
@Bean
public User getUser(){
return new User(); //就是返回要注入到bean的对象
}
}
实体类
package com.lsq.pojo;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
//这里这个注解的意思就是说明 这个类被Spring接管了,注册到了容器中
@Component
public class User {
private String name;
public String getName() {
return name;
}
@Value("文姬") //属性注入值
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "User{" +
"name='" + name + '\'' +
'}';
}
}
测试类
import com.lsq.config.MyConfig;
import com.lsq.pojo.User;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class MyTest {
public static void main(String[] args) {
//如果完全是用了配置类方式去做,我们就只能通过AnnotationConfig上下文来获取容器,通过配置的class对象加载
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(MyConfig.class);
User getUser = (User)context.getBean("getUser");
System.out.println(getUser.getName());
}
}
代理模式
静态代理
-
接口
package com.lsq.demo01;
//租房
public interface Rent {
public void rent();
} -
真实角色
package com.lsq.demo01;
public class Host implements Rent{
@Override
public void rent() {
System.out.println("房东要出租房子");
}
} -
代理角色
package com.lsq.demo01;
public class Proxy implements Rent{
private Host host;
public Proxy() {
}
public Proxy(Host host) {
this.host = host;
}
@Override
public void rent() {
seeHouse();
host.rent();
hetong();
fare();
}
//看房
public void seeHouse(){
System.out.println("中介带你看房");
}
//签租赁合同
public void hetong(){
System.out.println("签租赁合同");
}
//收中介费
public void fare(){
System.out.println("收中介费");
}
} -
客户端访问代理角色
package com.lsq.demo01;
public class Client {
public static void main(String[] args) {
//房东要出租房子
Host host = new Host();
//代理,中介帮房东出租房子,但是代理角色一般会有一些附属操作
Proxy proxy = new Proxy(host);
proxy.rent();
}
}加深理解
接口
package com.lsq.demo02;
public interface UserService {
public void add();
public void delete();
public void update();
public void query();
}真实对象
package com.lsq.demo02;
//真实对象
public class UserServiceImpl implements UserService{
@Override
public void add() {
System.out.println("增加了一个用户");
}
@Override
public void delete() {
System.out.println("删除了一个用户");
}
@Override
public void update() {
System.out.println("更新了一个用户");
}
@Override
public void query() {
System.out.println("查询了一个用户");
}
}代理对象
package com.lsq.demo02;
public class UserServiceProxy implements UserService{
private UserServiceImpl userService;
public void setUserService(UserServiceImpl userService) {
this.userService = userService;
}
@Override
public void add() {
log("add");
userService.add();
}
@Override
public void delete() {
log("delete");
userService.delete();
}
@Override
public void update() {
log("update");
userService.update();
}
@Override
public void query() {
log("query");
userService.query();
}
public void log(String message){
System.out.println("使用了"+message+"方法");
}
}客户端
package com.lsq.demo02;
public class Client {
public static void main(String[] args) {
UserServiceImpl userService = new UserServiceImpl();
UserServiceProxy userServiceProxy = new UserServiceProxy();
userServiceProxy.setUserService(userService);
userServiceProxy.add();
}
}
AOP
动态代理
-
动态代理和静态代理角色一样
-
动态代理的代理类是动态生成的,不是我们直接写的
-
动态代理分为两大类:基于接口的动态代理,基于类的动态代理
-
基于接口——-JDK动态代理
-
基于类:cglib
-
java字节码实现:javasist
动态代理的好处:
-
可以使真实角色操作更加纯粹,不用去关注一些公共的业务
-
公共业务就交给代理角色,实现了业务的分工
-
公共业务发生扩展的时候,方便集中管理
-
一个动态代理类代理的是一个接口,一般就是对应一类业务
-
一个动态代理类可以代理多个类,只要是实现了同一个接口即可
package com.lsq.demo04;
import com.lsq.demo03.Rent;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
//用这个类自动生成代理类
public class ProxyInvocationHandler implements InvocationHandler {
//被代理的接口
private Object target;
public void setTarget(Object target) {
this.target = target;
}
//生成得到代理类
public Object getProxy(){
return Proxy.newProxyInstance(this.getClass().getClassLoader(), target.getClass().getInterfaces(),this);
}
//处理代理实例,并返回结果
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
//动态代理的本质,就是使用反射机制实现
Object result = method.invoke(target, args);
return result;
}
}package com.lsq.demo04;
import com.lsq.demo02.UserService;
import com.lsq.demo02.UserServiceImpl;
import com.lsq.demo03.Host;
import com.lsq.demo04.ProxyInvocationHandler;
import com.lsq.demo03.Rent;
public class Client {
public static void main(String[] args) {
//真实角色
UserServiceImpl userService = new UserServiceImpl();
//代理角色:现在没有
ProxyInvocationHandler pih = new ProxyInvocationHandler();
//通过调用程序处理角色来处理我们要调用的接口对象
pih.setTarget(userService);
UserService proxy = (UserService)pih.getProxy();
proxy.add();
}
} -
使用Spring实现Aop
【重点】使用AOP织入,需要导入一个依赖包
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.19</version>
</dependency>
方式一:使用Spring的API接口
接口
package com.lsq.service;
public interface UserService {
public void add();
public void delete();
public void update();
public void query();
}
实现类
package com.lsq.service;
public class UserServiceImpl implements UserService{
@Override
public void add() {
System.out.println("增加了一个用户");
}
@Override
public void delete() {
System.out.println("删除了一个用户");
}
@Override
public void update() {
System.out.println("修改了一个用户");
}
@Override
public void query() {
System.out.println("查询了一个用户");
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<!--注册bean-->
<bean id="userService" class="com.lsq.service.UserServiceImpl"/>
<bean id="log" class="com.lsq.log.Log"/>
<bean id="afterLog" class="com.lsq.log.AfterLog"/>
<!--配置AOP:需要导入aop的约束-->
<aop:config>
<!--切入点:expression:表达式,execution(要执行的位置! * * * * *)-->
<aop:pointcut id="pointcut" expression="execution(* com.lsq.service.UserServiceImpl.*(..))"/>
<!--执行环绕增加-->
<aop:advisor advice-ref="log" pointcut-ref="pointcut"/>
<aop:advisor advice-ref="afterLog" pointcut-ref="pointcut"/>
</aop:config>
</beans>
测试
import com.lsq.service.UserService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyTest {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
//动态代理代理的是接口
UserService userService = context.getBean("applicationContext.xml", UserService.class);
userService.add();
}
}
方式二:自定义来实现AOP
applicationContext.xml
<bean id="diy" class="com.lsq.diy.DiyPointCut"/>
<aop:config>
<!--自定义切面,ref 要引用的类-->
<aop:aspect ref="diy">
<!--切入点-->
<aop:pointcut id="point" expression="execution(* com.lsq.service.UserServiceImpl.*(..))"/>
<!--通知-->
<aop:before method="before" pointcut-ref="point"/>
<aop:after method="after" pointcut-ref="point"/>
</aop:aspect>
</aop:config>
方式三:使用注解实现
<!--方式三:使用注解定义aop-->
<bean id="diy" class="com.lsq.diy.DiyPointCut"/>
<!--开启注解支持!JDK(默认proxy-target-class="false")cglib (proxy-target-class="true")-->
<aop:aspectj-autoproxy/>
package com.lsq.diy;
//方式三:使用注解方式实现aop
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
@Aspect //标注这是一个切面
public class AnnotationPointcut {
@Before("execution(* com.lsq.service.UserServiceImpl.*(..))")
public void before(){
System.out.println("=========方法执行前========");
}
@After("execution(* com.lsq.service.UserServiceImpl.*(..))")
public void after(){
System.out.println("=========方法执行后========");
}
@Around("execution(* com.lsq.service.UserServiceImpl.*(..))")
public void around(ProceedingJoinPoint jp) throws Throwable {
System.out.println("环绕前");
Object proceed = jp.proceed();
Signature signature = jp.getSignature();
System.out.println(proceed);
System.out.println(signature);
System.out.println("环绕后");
}
}
整合mybatis
步骤:
-
导入jar包
-
junit
-
mybatis
-
mysql数据库
-
spring相关的包
-
aop织入
-
mybatis-spring【新包】
<?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">
<parent>
<artifactId>Spring-Study</artifactId>
<groupId>com.lsq</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-08</artifactId>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.13</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.25</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.15.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.15.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.19</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
</dependencies>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
</project> -
-
编写配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--DataSource:使用Spring的数据源替换Mybatis的配置 c3p0 dbcp druid-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="12345678"/>
</bean>
<!--sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/lsq/dao/UserMapper.xml"/>
</bean>
<!--sqlSessionTemplate:就是我们是用的sqlSession-->
<!-- <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">-->
<!-- <!–只能使用构造器注入sqlSessionFactory,因为它没有set方法–>-->
<!-- <constructor-arg index="0" ref="sqlSessionFactory"/>-->
<!-- </bean>-->
</beans> -
测试
Mybatis-spring
spring-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--DataSource:使用Spring的数据源替换Mybatis的配置 c3p0 dbcp druid-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="12345678"/>
</bean>
<!--sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/lsq/dao/UserMapper.xml"/>
</bean>
<!--sqlSessionTemplate:就是我们是用的sqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--只能使用构造器注入sqlSessionFactory,因为它没有set方法-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<import resource="spring-dao.xml"/>
<bean id="userMapper" class="com.lsq.dao.UserMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<properties resource="db.properties"/>
<typeAliases>
<package name="com.lsq.pojo"/>
</typeAliases>
</configuration>
-
编写数据源配置
<!--DataSource:使用Spring的数据源替换Mybatis的配置 c3p0 dbcp druid-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="12345678"/>
</bean> -
sqlSessionFactory
<!--sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/lsq/dao/UserMapper.xml"/>
</bean> -
sqlSessionTemplate
<!--sqlSessionTemplate:就是我们是用的sqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--只能使用构造器注入sqlSessionFactory,因为它没有set方法-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean> -
需要给接口加实现类
package com.lsq.dao;
import com.lsq.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class UserMapperImpl implements UserMapper{
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
@Override
public List<User> getUserList() {
UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
return userMapper.getUserList();
}
} -
将自己写的实现类注入到Spring中
<bean id="userMapper" class="com.lsq.dao.UserMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean> -
测试使用
import com.lsq.dao.UserMapper;
import com.lsq.pojo.User;
import org.junit.Test;
import org.apache.ibatis.io.Resources;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
public class MyTest {
@Test
public void getUserList() throws IOException {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
List<User> userList = userMapper.getUserList();
for (User user : userList) {
System.out.println(user);
}
}
}
SqlSessionDaoSupport
spring-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd">
<!--DataSource:使用Spring的数据源替换Mybatis的配置 c3p0 dbcp druid-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8&useSSL=false"/>
<property name="username" value="root"/>
<property name="password" value="12345678"/>
</bean>
<!--sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/lsq/dao/UserMapper.xml"/>
</bean>
<!--sqlSessionTemplate:就是我们是用的sqlSession-->
<!-- <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">-->
<!-- <!–只能使用构造器注入sqlSessionFactory,因为它没有set方法–>-->
<!-- <constructor-arg index="0" ref="sqlSessionFactory"/>-->
<!-- </bean>-->
</beans>
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="spring-dao.xml"/>
<!-- <bean id="userMapper" class="com.lsq.dao.UserMapperImpl">-->
<!-- <property name="sqlSession" ref="sqlSession"/>-->
<!-- </bean>-->
<bean id="userMapper2" class="com.lsq.dao.UserMapperImpl2">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
实现类
package com.lsq.dao;
import com.lsq.pojo.User;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import java.util.List;
public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper {
@Override
public List<User> getUserList() {
return getSqlSession().getMapper(UserMapper.class).getUserList();
}
}
测试
import com.lsq.dao.UserMapper;
import com.lsq.pojo.User;
import org.junit.Test;
import org.apache.ibatis.io.Resources;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
public class MyTest {
@Test
public void getUserList() throws IOException {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("userMapper2", UserMapper.class);
List<User> userList = userMapper.getUserList();
for (User user : userList) {
System.out.println(user);
}
}
}
声明式事务
<!--配置声明式事务-->标签:www,spring,Day20,springframework,context,org,import,public From: https://www.cnblogs.com/happyQueen/p/17595283.html
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--结合AOP实现事务的织入-->
<!--配置事务的通知:-->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<!--给哪些方法配置事务-->
<!--配置事务的传播特性:new propagation-->
<tx:attributes>
<tx:method name="add" propagation="REQUIRED"/>
<tx:method name="delete" propagation="REQUIRED"/>
<tx:method name="update" propagation="REQUIRED"/>
<tx:method name="select" read-only="true"/>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--配置事务切入-->
<aop:config>
<aop:pointcut id="pointcut" expression="execution(* com.lsq.dao.*.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"/>
</aop:config>