# wft-spring

**Repository Path**: wft740/wft-spring

## Basic Information

- **Project Name**: wft-spring
- **Description**: No description available
- **Primary Language**: Java
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2022-04-17
- **Last Updated**: 2022-04-17

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# Spring
## Spring对象的创建
* Person对象
```java
package com.wft.bean;

public class Person {
    private Integer id;
    private String name;
    private Integer age;
    private String gender;

    public Person() {
        System.out.println("Person is created.");
    }

    public Person(Integer id) {
        this.id = id;
    }

    public Person(Integer id, String name, Integer age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    public Person(Integer id, String name, String gender) {
        this.id = id;
        this.name = name;
        this.gender = gender;
    }

    public Person(Integer id, String name, Integer age, String gender) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.gender = gender;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public void setPk(Integer id) {
        this.id = id;
    }

    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 getGender() {
        return gender;
    }

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

    @Override
    public String toString() {
        return "Person{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", gender='" + gender + '\'' +
                '}';
    }
}
```
* 配置文件：spring.xml
```xml
<bean id="person" class="com.wft.bean.Person">
    <property name="id" value="1" />
    <property name="name" value="wft" />
    <property name="age" value="18" />
    <property name="gender" value="男" />
</bean>
<!-- scope默认为singleton，表示Spring容器创建的对象为单例；prototype表示为多例 -->
<bean id="person2" class="com.wft.bean.Person" scope="prototype">
    <property name="id" value="1" />
    <property name="name" value="wft" />
    <property name="age" value="18" />
    <property name="gender" value="男" />
</bean>
```
* 获取对象
> 通过Bean的id获取IOC容器中的对象
```java
 @Test
public void test02() {
    ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
    Person person = applicationContext.getBean("person", Person.class);
    System.out.println(person);
}
```
> 通过Bean的类型获取IOC容器中的对象
```java
 @Test
public void test02() {
    // 当有多个Person对象的时候：No qualifying bean of type 'com.wft.bean.Person' available: expected single matching bean but found 2: person,person2
    ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
    Person person = applicationContext.getBean(Person.class);
    System.out.println(person);
}
```

## Spring属性的复制
* 通过构造器给Bean对象赋值