黑马2014 spring后期 ssh整合后期讲解不清楚源码讲解太多 spring重新开始 itcast2016版本

介绍

Spring搭建

约束引入注意事项

导入至eclipse:windows-preference-cata-导入 spring-framework-4.2.4.RELEASE-scheme-beans-最新的版本

新建xml文件, <beans>--edit namespace- 添加xsi

添加cata刚才的添加的scheme

Spring 概念

Ioc di

applicationContext&BeanFactory

spring配置详解

bean元素

spring与strut2结合 scope选择多例

bean init-method属性方法与对应class中的方法对应

factory-method

需要配置2个bean factory-bean属性 factory-method

spring属性注入

index type value 定义参数

基于其他bean的注入

导包 4核心+2日志+1web整合

监听器(设置监听器指定路径) 让applicationContext 随着servletContext启动而启动, 在servletContext(application)启动时候,创建applicationContext存储在servletContext(application)域中, 因此获得servletContext(application)就能获得applicationContext ,然后getBean

使用注解配置spring

命名空间前缀需要

spring中的aop

结论概念:动态代理代理对象和目标对象实现了同个接口 cglib代理对象继承了目标对象

手动使用jdk代理观光代码

package cn.itcast.service;

public interface UserService {

    void save();

    void delete();

    void update();

    void find();

}

UserServiceInterface

package cn.itcast.service;

public class UserServiceImpl implements UserService{

    public void save() {

        System.out.println("save user");

    }

    public void delete() {

        System.out.println("delete user");

    }

    public void update() {

        System.out.println("update user");

    }

    public void find() {

        System.out.println("find user");

    }

}

UserServiceImpl

package cn.itcast.c_proxy;

import java.lang.reflect.InvocationHandler;

import java.lang.reflect.Method;

import java.lang.reflect.Proxy;

import cn.itcast.service.UserService;

import cn.itcast.service.UserServiceImpl;

public class UserServiceProxyFactory implements InvocationHandler{

    private UserService us;

    public UserServiceProxyFactory(UserService us) {

        super();

        this.us = us;

    }

    public UserService getUserServiceProxy(){

        UserService usProxy = (UserService) Proxy.newProxyInstance(UserServiceProxyFactory.class.getClassLoader(), UserServiceImpl.class.getInterfaces(), this);

        return usProxy;

    }

    public Object invoke(Object proxy, Method method, Object[] args)

            throws Throwable {

        System.out.println("打开事务");

        Object invoke = method.invoke(us, args);

        System.out.println("关闭事务");

        return invoke;

    }

}

UseServiceProxyFactory

package cn.itcast.c_proxy;

import org.junit.Test;

import cn.itcast.service.UserService;

import cn.itcast.service.UserServiceImpl;

public class Demo {

    @Test

    public void fun1(){

        UserService us =new UserServiceImpl();

        UserServiceProxyFactory userServiceProxyFactory = new UserServiceProxyFactory(us);

        UserService userServiceProxy = userServiceProxyFactory.getUserServiceProxy();

        userServiceProxy.save();

    }

}

Demo

手动使用cglib代理(了解)