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最新推荐文章于 2020-11-02 19:08:39 发布

原创最新推荐文章于 2020-11-02 19:08:39 发布 · 309 阅读

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该博客主要探讨了Spring框架中的配置文件`applicationContext.xml`，详细介绍了如何配置及实例化各种类和接口，包括Speak类、TestSpeak、Print类、Paper接口及其实现类A4Paper和B5Paper，还有Lnk接口以及其实现类colorLnk和GrayLnk。此外，还讨论了用于增强功能的类以及UserDao和UserService接口的实现，如UserDaoImpl和UserServiceImpl。

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applicationContext.xml

<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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-34.1.xsd">

   <bean id="showSpeak1" class="com.oupeng.speak.Speak">
        <property name="speakPerson">
            <value>张嘎</value>
        </property>
        <property name="speakContent">
            <value>三天不打小鬼子，手都痒痒！</value>
        </property>
    </bean>

    <bean id="showSpeak2" class="com.oupeng.speak.Speak">
        <property name="speakPerson">
            <value>Rod</value>
        </property>
        <property name="speakContent">
            <value>世界上有10种人，认识二进制的和不认识二进制的。</value>
        </property>
    </bean>
  </beans>

Speak类

package com.oupeng.speak;

public class Speak {
    private String speakPerson;
    private String speakContent;//说话内容

    public void showSpeak(){
        System.out.println(this.speakPerson+"说：“"+this.speakContent+"”");
    }

    public String getSpeakPerson() {
        return speakPerson;
    }

    public void setSpeakPerson(String speakPerson) {
        this.speakPerson = speakPerson;
    }

    public String getSpeakContent() {
        return speakContent;
    }

    public void setSpeakContent(String speakContent) {
        this.speakContent = speakContent;
    }
}

TestSpeak

package com.oupeng.test;

import com.oupeng.speak.Speak;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpeak {

    @Test
    public void test1() {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        Speak speak1 = (Speak) context.getBean("showSpeak1");
        speak1.showSpeak();
        Speak speak2 = (Speak) context.getBean("showSpeak2");
        speak2.showSpeak();
    }

}

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Print类

package com.oupeng.printer;

import com.oupeng.lnk.Lnk;
import com.oupeng.paper.Paper;

//定义打印机类
public class Printer {
    private Lnk lnk;
    private Paper paper;

//    实现打印机的打印功能
    public void printInfo(){
        System.out.println("打印机在"+this.getPaper().getSize()+"上使用"+this.getLnk().getColor()+"打印人民币。。。。。");
    }

    public Lnk getLnk() {
        return lnk;
    }

    public void setLnk(Lnk lnk) {
        this.lnk = lnk;
    }

    public Paper getPaper() {
        return paper;
    }

    public void setPaper(Paper paper) {
        this.paper = paper;
    }
}

Paper接口

package com.oupeng.paper;
//定义纸张
public interface Paper {
//    定义规格
    public String getSize();//返回纸张的规格
}

A4Paper类

package com.oupeng.paper.impl;

import com.oupeng.paper.Paper;

public class A4Paper implements Paper {


    @Override
    public String getSize() {
        return "A4";
    }
}

B5Paper类

package com.oupeng.paper.impl;

import com.oupeng.paper.Paper;

public class B5Paper implements Paper {

    @Override
    public String getSize() {
        return "B5";
    }
}

Lnk接口

package com.oupeng.lnk;

//定义墨盒
public interface Lnk {
    public String getColor();//显示墨盒的颜色
}

colorLnk类

package com.oupeng.lnk.impl;

import com.oupeng.lnk.Lnk;

public class ColorLnk implements Lnk {
    @Override
    public String getColor() {
        return "彩色墨盒";
    }
}

GrayLnk类

package com.oupeng.lnk.impl;

import com.oupeng.lnk.Lnk;

public class GrayLnk implements Lnk {
    @Override
    public String getColor() {
        return "黑白墨盒";
    }
}

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用于增强的类

package com.oupeng.logger;

import org.apache.log4j.Logger;
import org.aspectj.lang.JoinPoint;

import java.util.Arrays;

//定义用于增强处理的类
public class UserServiceLogger {

    private static final Logger log = Logger.getLogger(UserServiceLogger.class);
    //前置增强
    public void beforePrintLogger(JoinPoint jp) {
        log.info("调用" + jp.getTarget() + "的" + jp.getSignature().getName() + "方法，方法参数" + Arrays.toString(jp.getArgs()));
    }

    //    定义用于后置增强处理的方法
    public void afterReturningPrintLogger(JoinPoint jp, Object result) {
        log.info("调用" + jp.getTarget() + "的" + jp.getSignature().getName() + "方法，方法返回值" + result);
    }
}

UserDao接口

package com.oupeng.dao;

import com.oupeng.pojo.User;

public interface UserDao {
    public int save(User user);
}

UserDaoImpl

package com.oupeng.dao.impl;

import com.oupeng.dao.UserDao;
import com.oupeng.pojo.User;

public class UserDaoImpl implements UserDao {
    @Override
    public int save(User user) {
        System.out.println("保存用户到数据库");
        return 1;
    }
}

UserService接口

package com.oupeng.dao;

import com.oupeng.pojo.User;

public interface UserDao {
    public int  save(User user);
}

UserServiceImpl类

package com.oupeng.service.impl;

import com.oupeng.dao.UserDao;
import com.oupeng.dao.impl.UserDaoImpl;
import com.oupeng.pojo.User;
import com.oupeng.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;

public class UserServiceImpl implements UserService {
    UserDao ud;
    @Override
    public int addNewUser(User user) {
        ud.save(user);
        return 2;
    }


    public void setUd(UserDao ud) {
        this.ud = ud;
    }

    public UserDao getUd() {
        return ud;
    }
}

applicationContext.xml

<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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.1.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
        http://www.springframework.org/schema/task
        http://www.springframework.org/schema/task/spring-task-34.1.xsd">
	<!--    配置数据访问层-->
    <bean id="userDao" class="com.oupeng.dao.impl.UserDaoImpl"/>
    <!--   配置业务逻辑层-->
    <bean id="userService" class="com.oupeng.service.impl.UserServiceImpl">
        <!--        将 com.oupeng.dao.impl.UserDaoImpl创建的对象注入到 ud中使用（这个过程是Spring实现的）-->
        <property name="ud" ref="userDao"></property>
    </bean>

    <!--    配置用于增强处理的Bean组件-->
    <bean id="userServiceLogger" class="com.oupeng.logger.UserServiceLogger"></bean>

    <!--  开始进行AOP的配置  -->
    <aop:config>
        <!--先配置切入点-->
        <aop:pointcut id="pointCut" expression="execution(public int addNewUser(com.oupeng.pojo.User))"/>

        <!--切面-->
        <aop:aspect id="" ref="userServiceLogger">
            <!-- 前置增强-->
            <aop:before method="beforePrintLogger" pointcut-ref="pointCut"/>
            <!--  后置增强-->
            <aop:after-returning method="afterReturningPrintLogger" pointcut-ref="pointCut" returning="result"/>
        </aop:aspect>
    </aop:config>
</beans>

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