1.构造器注入

之前写过了~~~~

2.Set方式注入【重点】

3.拓展方式注入

2.Set方式注入【重点】

【环境搭建】

1.复杂类型

2.真实测试对象

四个文件

Student实体类的创建：

主要是依据官方文档来建立。那个Address也是为了测试不同的类型，而创建的引入类。主体是这个Student！！！

package com.Li.pojo;import java.util.*;//搭建多种注入方式，所以需要多种参数类型
public class Student {private String name;private Address address;private String[] books;private List<String> hobbys;private Map<String,String> card;private Set<String> games;private Properties info;private String wife;public String getName() {return name;}public void setName(String name) {this.name = name;}public Address getAddress() {return address;}public void setAddress(Address address) {this.address = address;}public String[] getBooks() {return books;}public void setBooks(String[] books) {this.books = books;}public List<String> getHobbys() {return hobbys;}public void setHobbys(List<String> hobbys) {this.hobbys = hobbys;}public Map<String, String> getCard() {return card;}public void setCard(Map<String, String> card) {this.card = card;}public Set<String> getGames() {return games;}public void setGames(Set<String> games) {this.games = games;}public Properties getInfo() {return info;}public void setInfo(Properties info) {this.info = info;}public String getWife() {return wife;}public void setWife(String wife) {this.wife = wife;}@Overridepublic String toString() {return "Student{" +"name='" + name + '\'' +", address=" + address +", books=" + Arrays.toString(books) +", hobbys=" + hobbys +", card=" + card +", games=" + games +", info=" + info +", wife='" + wife + '\'' +'}';}
}

Address实体类的创建：

package com.Li.pojo;public class Address {private String address;public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}
}

beans.xml(最基础的)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd"><!--最基础的创建对象--><bean id="student" class="com.Li.pojo.Student"><property name="name" value="李"/></bean></beans>

MyTest

import com.Li.pojo.Student;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class MyTest {public static void main(String[] args) {ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");Student student = (Student) context.getBean("student");System.out.println(student.getName());}
}

这些配置都没什么好说的，之前都配置过，学过。
测试

输出配置注入的名字

八种注入方式：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttps://www.springframework.org/schema/beans/spring-beans.xsd"><!--注册类--><bean id="address" class="com.Li.pojo.Address"/><!--最基础的创建对象,设置name的值为李--><bean id="student" class="com.Li.pojo.Student"><!--第一种，普通注入，value--><property name="name" value="李"/><!--第二种，bean注入，使用ref。--><property name="address" ref="address"/><!--第三种，数组注入--><property name="books"><array><value>红楼梦</value><value>水浒传</value><value>三国演义</value><value>西游记</value></array></property><!--第四种，List注入--><property name="hobbys"><list><value>听歌</value><value>敲代码</value><value>打球</value></list></property><!--第五种，Map注入（特殊）--><property name="card"><map><entry key="身份证" value="0000000"/><entry key="银行卡" value="1111111"/></map></property><!--第六种，Set注入--><property name="games"><set><value>LOL</value><value>COC</value><value>BOB</value></set></property><!--第七种，null注入--><property name="wife"><null></null></property><!--第八种，Properties注入（特殊）--><property name="info"><props><prop key="driver">20220000</prop><prop key="url">xxx</prop><prop key="password">1111</prop><prop key="username">root</prop></props></property></bean></beans>

测试一下。

发现address有问题，所以给Address类里面增加一个toString方法

测试修改之后：

成功！（因为再bean里面没有设置adress的值，所以为null）

拓展方式注入（了解即可）

User实体类：

package com.Li.pojo;public class User {public String name;public int age;public User() {}public User(String name, int age) {this.name = name;this.age = age;}@Overridepublic String toString() {return "User{" +"name='" + name + '\'' +", age=" + age +'}';}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}
}

userBeans.xml：

导入xml约束：

       xmlns:p="http://www.springframework.org/schema/p"xmlns:c="http://www.springframework.org/schema/c"

测试p与c （p对应无参构造，c对应有参构造）

测试：

   @Testpublic void test2(){ApplicationContext context = new ClassPathXmlApplicationContext("userBeans.xml");User user = context.getBean("user",User.class);//和强转本质一样，只不过换了一种形式System.out.println(user);User user2 = context.getBean("user2",User.class);System.out.println(user2);}