Spring框架基本代码

2022-10-27 17:25:55

1.准备阶段:

2.基本引入:

接口:

package com.xk.spring.kp01_hello;

public interface IHello {

    public void nice();

}

//实现类:

package com.xk.spring.kp01_hello;

public class Hello implements IHello {

    public void nice() {

        System.out.println("Hello.nice()");

    }

}

//测试类:

package com.xk.spring.kp01_hello;

import org.junit.Test;

import org.springframework.beans.factory.BeanFactory;

import org.springframework.beans.factory.xml.XmlBeanFactory;

import org.springframework.core.io.ClassPathResource;

@SuppressWarnings("deprecation")

public class TestHello {

    // 不采用@Autowired注解,不采用自动装配.

    // 采用面向对象编程思路.

    ClassPathResource resource = new ClassPathResource("HelloSpring.xml");

    BeanFactory factory = new XmlBeanFactory(resource);

    IHello hello = new Hello();

    @Test

    public void testName() throws Exception {

        IHello bean = factory.getBean("HelloSpringBean", IHello.class);

        bean.nice();

        System.out.println("~~~~~~~~~~~~~~~~~~~");

        hello.nice();

    }

}

2. 基本模型:

//接口:

package com.xk.spring.kp02_modules;

public interface ITestmoudles {

    public void sayhello();

}

//实现类:

package com.xk.spring.kp02_modules;

public class TestMoudles implements ITestmoudles {

    public void sayhello() {

        System.out.println("TestMoudles.sayhello()");

    }

    public void init() {

        System.out.println("TestMoudles.init()");

    }

    public void destroy() {

        System.out.println("TestMoudles.destroy()");

    }

}

<!-- xml文件,配置信息 -->

<?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

        http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="ModulesBean" class="com.xk.spring.modules.TestMoudles" init-method="init"

    destroy-method="destroy"/>

</beans>

//测试类

package com.xk.spring.kp02_modules;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.BeanFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

//面向接口编程

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration

// @ContextConfiguration("xml的名字.xml")如果有,则xml的名字不需要是测试类-context

public class TestMoudlesTest {

    /*

     ClassPathResource resource = new ClassPathResource("Moudles.xml");

     BeanFactory factory = new XmlBeanFactory(resource);

     */

    @Autowired //不用new实现类 完全面向接口编程

    BeanFactory factory;

    @Test // 测试

    public void testName() throws Exception {

        ITestmoudles bean = factory.getBean("ModulesBean", ITestmoudles.class);

        bean.sayhello();

    }

}

3.基本传统实现创建bean:

package com.xk.spring.kp03_container.s1_basic;

public interface IContainer {

    public void testcontainer();

}

//实现类:

package com.xk.spring.kp03_container.s1_basic;

public class ContainerImlp implements IContainer {

    public ContainerImlp() {

        System.out.println("ContainerImlp.ContainerImlp()");

    }

    public void init() {

        System.out.println("ContainerImlp.init()");

    }

    public void destroy() {

        System.out.println("ContainerImlp.destory()");

    }

    public void testcontainer() {

        System.out.println("-------------------------");

    }

}

<!-- xml配置  -->

<?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">

        <!-- id= "唯一标识" class= "实现类的权限定"-->

    <bean id="testContainerBean" class="com.xk.spring.kp03_container.s1_basic.ContainerImlp"

    init-method="init" destroy-method="destroy"/> 

    <!-- lazy-init:true 告诉Spring容器, 不再在容器启动的时候实例化对应bean -->

</beans>

注:运行时将第一行注释删掉

//测试类:

package com.xk.spring.kp03_container.s1_basic;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.ApplicationContext;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration

public class ContainerTest {

    //ApplicationContext: 也是一个接口, 继承了BeanFactory, ApplicationContext容器功能更加全面

    @Autowired

    ApplicationContext appCtx;

    @Test

    public void testName() throws Exception {

        IContainer con = appCtx.getBean("testContainerBean", IContainer.class);

        con.testcontainer();

    }

}

4.静态工厂方法生产bean:

package com.xk.spring.kp03_container.s2_staticcreatebean;

public interface IStaticCreateBean {

    public void creatbean();

}

package com.xk.spring.kp03_container.s2_staticcreatebean;

public class StaticCreateBeanImpl implements IStaticCreateBean {

    @Override

    public void creatbean() {

        System.out.println("------------------------");

    }

    public void init() {

        System.out.println("StaticCreateBeanImpl.init()");

    }

    public void destroy() {

        System.out.println("StaticCreateBeanImpl.destroy()");

    }

}

package com.xk.spring.kp03_container.s2_staticcreatebean;

public class StaticCreateBeanFactory {

    public static StaticCreateBeanImpl creatbean() {

        StaticCreateBeanImpl bean = new StaticCreateBeanImpl();

        bean.init();

        bean.destroy();

        bean.creatbean();

        return bean;

    }

}

package com.xk.spring.kp03_container.s2_staticcreatebean;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.ApplicationContext;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration

public class StaticCreateBeanTest {

    @Autowired

    ApplicationContext appCtx;

    @Test

    public void testName() throws Exception {

        IStaticCreateBean bean = appCtx.getBean("StaticCreateBean", IStaticCreateBean.class);

        bean.creatbean();

    }

}

<?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="StaticCreateBean"

        class="com.xk.spring.kp03_container.s2_staticcreatebean.StaticCreateBeanFactory"

        init-method="init" destroy-method="destroy" factory-method="creatbean" />

</beans>

5.BeanFactory:

package com.xk.spring.kp03_container.s3_factorybeancreate;

public interface IFactoryCreateBean {

    public void factory();

}

package com.xk.spring.kp03_container.s3_factorybeancreate;

public class ImplFactoryCreateBean implements IFactoryCreateBean {

    public ImplFactoryCreateBean() {

        System.out.println("ImplFactoryBeanCreate.ImplFactoryBeanCreate()");

    }

    public void init() {

        System.out.println("ImplFactoryBeanCreate.init()");

    }

    public void destory(){

        System.out.println("ImplFactoryBeanCreate.destory()");

    }

    @Override

    public void factory() {

        System.out.println("ImplFactoryBeanCreate.factory()");

    }

}

package com.xk.spring.kp03_container.s3_factorybeancreate;

import org.springframework.beans.factory.FactoryBean;

//创建bean工厂,只需要一个类实现FactoryBean接口,则Spring框架就会默认为该类是一个工厂类

public class CreateBeanFactory implements FactoryBean<ImplFactoryCreateBean> {

    @Override

    public ImplFactoryCreateBean getObject() throws Exception {

        ImplFactoryCreateBean bean = new ImplFactoryCreateBean();

        return bean;

    }

    @Override

    public Class<?> getObjectType() {

        return ImplFactoryCreateBean.class;

    }

    @Override

    public boolean isSingleton() {

        return false;

    }

}

package com.xk.spring.kp03_container.s3_factorybeancreate;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.ApplicationContext;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration

public class FactoryBeanTest {

    /*

     * 自动配置

     *

     * @Autowired可以对成员变量、方法和构造函数进行标注，来完成自动装配的工作，

     * 这里必须明确：@Autowired是根据类型进行自动装配的，如果需要按名称进行装配，则需要配合@Qualifier[1]使用.

     * @Autowired标注可以放在成员变量上，也可以放在成员变量的set方法上。前者，

     * Spring会直接将UserDao类型的唯一一个bean赋值给userDao这个成员变量；后者，

     * Spring会调用setUserDao方法来将UserDao类型的唯一一个bean装配到userDao这个属性。 Spring

     * 2.5引入了 @Autowired 注释，它可以对类成员变量、方法及构造函数进行标注，完成自动装配的工作。

     * 通过 @Autowired的使用来消除set ，get方法。

     */

    @Autowired

    ApplicationContext appCtx;

    @Test

    public void FactoryBean() throws Exception {

        ImplFactoryCreateBean bean = appCtx.getBean("CreateFactoryBean", ImplFactoryCreateBean.class);

        bean.factory();

    }

}

<?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="CreateFactoryBean"

        class="com.xk.spring.kp03_container.s3_factorybeancreate.ImplFactoryCreateBean"

        init-method="init" destroy-method="factory"  />

</beans>

6:instance实例化创建Bean:

package com.xk.spring.kp03_container.s4_instancecreatebeanFactory;

public interface IInstanceCreateBean {

    public void instanceCreate();

}

package com.xk.spring.kp03_container.s4_instancecreatebeanFactory;

public class ImplInatanceCreateBean implements IInstanceCreateBean {

    public ImplInatanceCreateBean() {

        System.out.println("我是构造......");

    }

    public void init() {

        System.out.println("我是init......");

    }

    public void destroy() {

        System.out.println("我是destroy......");

    }

    @Override

    public void instanceCreate() {

        System.out.println("我是实现方法.......");

    }

}

package com.xk.spring.kp03_container.s4_instancecreatebeanFactory;

public class InstanceCreateFactoryBean {

    public ImplInatanceCreateBean create() {

        ImplInatanceCreateBean bean = new ImplInatanceCreateBean();

        bean.init();

        bean.destroy();

        return bean;

    }

}

package com.xk.spring.kp03_container.s4_instancecreatebeanFactory;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.ApplicationContext;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration

public class InstanceCreateFactoryTest {

    @Autowired

    ApplicationContext AppCtx;

    @Test

    public void InstanceFactory() throws Exception {

        IInstanceCreateBean bean = AppCtx.getBean("InstanceCreateFactoryBean", IInstanceCreateBean.class);

        bean.instanceCreate();

    }

}

<?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="InstanceCreateFactoryBean"

        class="com.xk.spring.kp03_container.s4_instancecreatebeanFactory.ImplInatanceCreateBean"

    init-method="init" destroy-method="destroy"/>

</beans>

7.Scope属性使用:

package com.xk.spring.kp03_container.s5_scope;

public interface IScopeBean {

    public void init();

    public void destroy();

    public void scope();

}

package com.xk.spring.kp03_container.s5_scope;

public class ImplScopeBean implements IScopeBean {

    public ImplScopeBean() {

        System.out.println("我是构造...");

    }

    @Override

    public void init() {

        System.out.println("init...");

    }

    @Override

    public void destroy() {

        System.out.println("destroy...");

    }

    @Override

    public void scope() {

        System.out.println("scope...");

    }

}

package com.xk.spring.kp03_container.s5_scope;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.context.ApplicationContext;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration

public class ScopeBeanTest {

    @Autowired

    ApplicationContext AppCtx;

    @Test

    public void Scope() throws Exception {

        IScopeBean bean1 = AppCtx.getBean("ScopeBean", IScopeBean.class);

        IScopeBean bean2 = AppCtx.getBean("ScopeBean", IScopeBean.class);

        System.out.println(bean1==bean2);

        bean1.init();

        bean2.init();

        bean1.destroy();

        bean1.scope();

    }

}

<?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="ScopeBean" class="com.xk.spring.kp03_container.s5_scope.ImplScopeBean"

        init-method="init" destroy-method="destroy" scope="singleton" />

    <!-- scope: singleton: 单例 每次创建的bean相同;

         prototype: 原型类型, 非单例的, 每次getBean都会创建一个新的对象

    -->

</beans>

8.Spring和Struts2练习使用:

工程结构:

package com.xk.spring.exercise.dao;

import com.xk.spring.exercise.domain.Student;

public interface IStudentDao {

    public void save(Student stu);

}

package com.xk.spring.exercise.dao.impl;

import org.springframework.stereotype.Repository;

import com.xk.spring.exercise.dao.IStudentDao;

import com.xk.spring.exercise.domain.Student;

@Repository

public class StudentImpl implements IStudentDao {

    @Override

    public void save(Student stu) {

        System.out.println("保存中..."+stu);

    }

}

//domain

package com.xk.spring.exercise.domain;

public class Student {

    private String name;

    private int id;

    public Student() {

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    @Override

    public String toString() {

        return "Student [name=" + name + ", id=" + id + "]";

    }

}

//action层

package com.xk.spring.exercise.action;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import com.xk.spring.exercise.domain.Student;

import com.xk.spring.exercise.service.IServiceStudent;

@Controller

public class StudentAction {

    @Autowired

    private IServiceStudent service;

    public void save() {

        Student stud = new Student();

        stud.setName("张三");

        stud.setId(10);

        service.save(stud);

    }

}

//Servixe层

//接口

package com.xk.spring.exercise.service;

import com.xk.spring.exercise.domain.Student;

public interface IServiceStudent {

    public void save (Student stu);

}

//实现类:

package com.xk.spring.exercise.service.serviceimpl;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import com.xk.spring.exercise.dao.IStudentDao;

import com.xk.spring.exercise.domain.Student;

import com.xk.spring.exercise.service.IServiceStudent;

@Service

public class ServiceStudentImpl implements IServiceStudent {

    //需要一个dao的实例;

    @Autowired

    private IStudentDao dao;

    @Override

    public void save(Student stu) {

        dao.save(stu);

    }

}

//测试类:

package com.xk.spring.exercise.actionTest;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.xk.spring.exercise.action.StudentAction;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration

public class ActionTest {

    @Autowired

    StudentAction student;

    @Test

    public void testActionTest() throws Exception {

        student.save();

    }

}

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

        xmlns:context="http://www.springframework.org/schema/context"

       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

           http://www.springframework.org/schema/context

           http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="com.xk.spring.exercise"/>

</beans>

码农公寓

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