Spring-日志整合与注入

 首先修改pom.xml引入log4j日志依赖： 

    4.0.0

    com.itheima
    spring02
    1.0-SNAPSHOT

    
        
            junit
            junit
            4.11
            test
        
     
        
            org.springframework
            spring-context
            5.1.14.RELEASE
        

        

        
            org.slf4j
            slf4j-log4j12
            1.7.25
        

        
            log4j
            log4j
            1.2.17
        


    

创建log4j的配置文件：

#resources文件夹根目录下
### 配置根
log4j.rootLogger=debug,console

### 日志输出到控制台
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.Target=System.out
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L -%m%n

UserServiceImpl类：添加一个userDAO属性，给它赋初值

package com.itheima;

public class UserServiceImpl implements UserService {

    //private UserDAO userDAO=new UserDAOImpl();//这里也会出现耦合，需要工厂类解耦合

    //使用工厂类解耦合
    //private UserDAO userDAO=BeanFactory.getUserDAO();

    //通用工厂方法
    //private UserDAO userDAO=(UserDAO) BeanFactory.getBean("userDAO");

    private UserDAO userDAO;

    public UserDAO getUserDAO() {
        return userDAO;
    }

    public void setUserDAO(UserDAO userDAO) {
        this.userDAO = userDAO;
    }

    @Override
    public void regist(User user) {
        userDAO.save(user);
    }

    @Override
    public void login(String name, String password) {
        userDAO.queryUserByNameAndPassword(name,password);
    }
}

applicationContext.xml配置文件

SpringTest类：

package com.itheima;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

public class SpringTest {
    //Spring的第一个程序
    @Test
    public void test1(){
        //1.获得spring的工厂
        ApplicationContext ctx=new ClassPathXmlApplicationContext("/applicationContext.xml");
        //2.通过工厂类获得对象
        Person person =(Person) ctx.getBean("person");
        System.out.println("Person="+person);
    }

    
    @Test
    public void test2(){
        //1.获得spring的工厂
        ApplicationContext ctx=new ClassPathXmlApplicationContext("/applicationContext.xml");
        //2.通过工厂类获得对象的重载方法2 不清强制类型转换
//        Person person = ctx.getBean("person", Person.class);
//        System.out.println("Person="+person);

        //这个方法，需要Spring工厂配置文件中只能有一个 tels=person.getTels();
        for (String tel:tels){
            System.out.println("tel="+tel);
        }
        System.out.println("==================");
        //List集合是有序的可以粗重复的元素
        List addresses=person.getAddresses();
        for (String address:addresses){
            System.out.println("address="+address);
        }
        System.out.println("---------------------");
        Map qqs=person.getQqs();
        Set keys=qqs.keySet();
        for (String key:keys){
            System.out.println("key="+key+"  value="+qqs.get(key));
        }
        System.out.println("=================");
        Properties p=person.getP();
        System.out.println("key is key1"+"  value is="+p.getProperty("key1"));
        System.out.println("key is key2"+"  value is="+p.getProperty("key2"));

    }

    @Test
    public void test8(){
        //1.获得spring的工厂
        ApplicationContext ctx=new ClassPathXmlApplicationContext("/applicationContext.xml");
        //2.通过工厂类获得对象
        UserService userService = (UserService) ctx.getBean("userService");

        userService.regist(new User("suns","123456"));
        userService.login("xiaohei","99999");

    }
}

test5：结果：

test6：

7.

8.