itcast-spring

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();
    }
}