spring框架学习（6）

依赖注入（重点）

6.1构造器注入

6.2set注入（重点）

实体类

package com.yms.entity;

/**

• @Author 杨明书

• @PackageName: com.yms.entity

• @ClassName: Address

• @Description:

• @Date: 2021/12/29 15:06
  */
  public class Address {
  private String address;

  public String getAddress() {
  return address;
  }

  public void setAddress(String address) {
  this.address = address;
  }

  @Override
  public String toString() {
  return "Address{" +
  "address='" + address + ''' +
  '}';
  }
  }

package com.yms.entity;

import java.time.Period;
import java.util.*;

/**

• @Author 杨明书

• @PackageName: com.yms.entity

• @ClassName: Student

• @Description:

• @Date: 2021/12/29 15:05
  */
  public class Student {
  private String name;
  private Address address;
  private String[] books;
  private List hobby;
  private Map<String, String> card;
  private Set grams;
  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 getHobby() {
  return hobby;
  }

  public void setHobby(List hobby) {
  this.hobby = hobby;
  }

  public Map<String, String> getCard() {
  return card;
  }

  public void setCard(Map<String, String> card) {
  this.card = card;
  }

  public Set getGrams() {
  return grams;
  }

  public void setGrams(Set grams) {
  this.grams = grams;
  }

  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;
  }

  @Override
  public String toString() {
  return "Student{" +
  "name='" + name + ''' +
  ", address=" + address.toString() +
  ", books=" + Arrays.toString(books) +
  ", hobby=" + hobby +
  ", card=" + card +
  ", grams=" + grams +
  ", info=" + info +
  ", wife='" + wife + ''' +
  '}';
  }
  }

配置注入

<!--        address引用类型的注入-->
<bean id="address" class="com.yms.entity.Address">
    <property name="address" value="西安"></property>
 </bean>
<!--        单一的string注入-->
<bean id="student" class="com.yms.entity.Student">
    <property name="name" value="李白"></property>
    <!--        address引用类型的注入-->
    <property name="address"  ref="address"></property>
    <!--        数组类型的注入-->
    <property name="books">
        <array>
            <value>1</value>
            <value>2</value>
            <value>3</value>
            <value>4</value>
        </array>
    </property>
    <!--        List类型的注入-->
    <property name="hobby">
        <list>
            <value>一</value>
            <value>二</value>
            <value>三</value>
            <value>四</value>
        </list>
    </property>
    <!--        Map类型的注入-->
    <property name="card">
        <map>
            <entry key="身份证" value="122222222222222222222"></entry>
            <entry key="银行卡" value="7633333333333333333333"></entry>
        </map>
    </property>
    <!--        Set类型的注入-->
    <property name="grams">
        <set>
            <value>lol</value>
            <value>bob</value>
        </set>
    </property>
    <!--        null类型的注入-->
    <property name="wife">
        <null></null>
    </property>

    <!--        Properties类型的注入-->
    <property name="info">
        <props>
            <prop key="学号">T12309</prop>
            <prop key="性别">男</prop>
        </props>
    </property>
  </bean>