代碼：

spring2.2-構(gòu)造方法注入.zip - 藍(lán)奏云文件大小：14.9 K|https://www.lanzouw.com/iLbBBvpug4b

1、定義Category和Product類，定義有參構(gòu)造函數(shù)，

package com.how2j.pojo;public class Category {private int id;private String name;//定義無參構(gòu)造函數(shù)，如果提供了Set方法，則可以使用Set方法注入屬性public Category() {}//定義有參構(gòu)造函數(shù)，可以使用構(gòu)造方法來注入屬性public Category(int id, String name) {this.id = id;this.name = name;}public int getId() {return id;}public void setId(int id) {this.id = id;}@Overridepublic String toString() {return "Category{" +"id=" + id +", name='" + name + '\'' +'}';}public String getName() {return name;}public void setName(String name) {this.name = name;} } package com.how2j.pojo;public class Product {//普通屬于類型private int id;private String name;//引用類型private Category category;public Product() {}public Product(int id, String name, Category category) {this.id = id;this.name = name;this.category = category;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Category getCategory() {return category;}public void setCategory(Category category) {this.category = category;}@Overridepublic String toString() {return "Product{" +"id=" + id +", name='" + name + '\'' +", category=" + category +'}';} }

2、編寫xml文件，

<?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 http://www.springframework.org/schema/beans/spring-beans.xsd"><bean id="c" class="com.how2j.pojo.Category"><constructor-arg name="id" value="1"/><constructor-arg name="name" value="category 1"/></bean><bean id="p" class="com.how2j.pojo.Product"> <!-- 普通屬性--><constructor-arg name="id" value="1"/><constructor-arg name="name" value="product 1"/> <!-- 引用屬性--><constructor-arg name="category" ref="c"/></bean> </beans>

3、測試

package test;import com.how2j.pojo.Category; import com.how2j.pojo.Product; import org.junit.jupiter.api.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;public class TestSpring {@Test//spring的控制翻轉(zhuǎn)public void test1(){ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml" );Category c = (Category) context.getBean("c");System.out.println(c);}@Test//測試spring的屬性注入public void test2(){ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml" );Product p = (Product) context.getBean("p");System.out.println(p);} }

補(bǔ)充：目錄結(jié)構(gòu)如下：

總結(jié)

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