Sring---注入方式 | 易学教程

1.bean.xml 创建完成成为Spring的一个bean，创建完成，然后注入使用：

注：依赖注入：1.依赖：bean对象的创建依赖spring容器。 2.注入：bean对象中的所有属性，由容器来注入。

注入方式：1.构造器注入：

　　　　　　2.set注入：

public class Address {
    private String address;

    public String getAddress() {
        return address;
    }

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

package com.chen.pojo;import java.util.List;import java.util.Map;import java.util.Properties;import java.util.Set;public class Student {    private String name;    private Address address;    private  String[] books;    private List<String> hobbys;    private Map<String,String> cards;    private Set<String> games;    private Properties  info;    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> getCards() {        return cards;    }    public void setCards(Map<String, String> cards) {        this.cards = cards;    }    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;    }    }

<?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/beans https://www.springframework.org/schema/beans/spring-beans.xsd">        <bean id="address" class="com.chen.pojo.Address">            <property name="address" value=""/>        </bean>        <bean id="student" class="com.chen.pojo.Student">            <!--        String name-->            <property name="name" value="chen"/>            <!--        Address addres-->            <property name="address" ref="address"/>            <!--        String[]  books-->            <property name="books">                <array value-type="java.lang.String">                    <value>java数</value>                    <value>java书2</value>                    <value>java书3</value>                </array>            </property>            <!--            List<String> hobbys-->            <property name="hobbys">                <list value-type="java.lang.String">                    <value>游泳</value>                    <value>游泳</value>                    <value>游泳</value>                </list>            </property>            <!--        Map<String,String> cards-->            <property name="cards">                <map value-type="java.lang.String" key-type="java.lang.String">                    <entry key="学生卡" value="123456"/>                    <entry key="学生卡2" value="123fds456"/>                    <entry key="学生卡3" value="1fsf23456"/>                </map>            </property>            <!--           Set<String> games-->            <property name="games">                <set value-type="java.lang.String">                    <value>LOL</value>                    <value>WOW</value>                </set>            </property>            <!--        String wife-->            <property name="wife">                <null/>            </property>            <!--        Properties info-->            <property name="info">                <props>                    <prop key="name">chentao</prop>                    <prop key="sex">男</prop>                </props>            </property>        </bean>        <bean id="hello" class="com.chen.pojo.Hello">            <property name="id" value="1"/>            <property name="name" value="lll"/>        </bean></beans>

　3.P: 和 C：命名空间的用法需要在配置文件里引入头配置链接

C：命名空间需要有参构造函数注入

来源：https://www.cnblogs.com/chencn/p/12331132.html

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