Spring框架学习05 引用外部属性文件和基于XML的自动装配

使用Spring创建数据库连接池，加载外部属性文件dbconfig.properties 

dbconfig.properties 文件配置如下：

jdbc.username=root
jdbc.password=12345678
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/test
jdbc.driverClass=com.mysql.jdbc.Driver

 加载外部属性文件，引入了classpath类路径下面的dbconfig文件

 基于XML的自动装配

Person类

package com.sf.jin;

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


public class Person {
    private String name;
    private Integer age;
    private String email;
    private String gender;
    private Car car;
    private List bookList;
    private Map mpas;
    private Properties properties;

    public Person() {
        System.out.println("无参构造器");
    }

    public Person(String name, Integer age, String email, String gender) {
        System.out.println("有参构造器");
        this.name = name;
        this.age = age;
        this.email = email;
        this.gender = gender;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }

    public Car getCar() {
        return car;
    }

    public void setCar(Car car) {
        this.car = car;
    }

    public List getBookList() {
        return bookList;
    }

    public void setBookList(List bookList) {
        this.bookList = bookList;
    }

    public Map getMpas() {
        return mpas;
    }

    public void setMpas(Map mpas) {
        this.mpas = mpas;
    }

    public Properties getProperties() {
        return properties;
    }

    public void setProperties(Properties properties) {
        this.properties = properties;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + ''' +
                ", age=" + age +
                ", email='" + email + ''' +
                ", gender='" + gender + ''' +
                ", car=" + car +
                ", bookList=" + bookList +
                ", mpas=" + mpas +
                ", properties=" + properties +
                '}';
    }
}

Car类

package com.sf.jin;


public class Car {
    private String carName;
    private Integer price;
    private String color;

    public String getCarName() {
        return carName;
    }

    public void setCarName(String carName) {
        this.carName = carName;
    }

    public Integer getPrice() {
        return price;
    }

    public void setPrice(Integer price) {
        this.price = price;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    @Override
    public String toString() {
        return "Car{" +
                "carName='" + carName + ''' +
                ", price=" + price +
                ", color='" + color + ''' +
                '}';
    }
}

 给Person赋值Car的值，使用 property：ref 这是手动赋值，使用autowire进行自动装配更方便，

主要有 autowire="byName"根据名字进行装配和  autowire="byType"根据类型进行装配