Spring注入,Ioc的具体配置

Posted 2020-10-06 溪山晴雪

Spring框架的IOC注入：

一、Java部分代码：

Person实体类：

  1 package com.ioc;
  2 
  3 import java.util.List;
  4 import java.util.Map;
  5 import java.util.Properties;
  6 import java.util.Set;
  7 
  8 import com.adviceAop.Dancer;
  9 import com.aop.Singer;
 10 
 11 /**
 12  * Spring 各种类型的注入。
 13  * @Person.java
 14  * @author BlueLake
 15  * @2017-9-12 下午2:11:02
 16  */
 17 public class Person {
 18 
 19     //普通类型：字符串类型
 20     private String pname;
 21     //普通类型：字符串类型
 22     private int age;
 23     //集合类型：list 
 24     private List<String> loves;
 25     //集合类型：Set 
 26     private Set<String> books;
 27     //集合类型：Map 
 28     private Map<String,String> heros;
 29     //集合类型：Properties 
 30     private Properties palaces;
 31     //引用类型
 32     private Singer singer;
 33     private Dancer dancer;
 34     
 35     private Emp emp ;
 36     
 37     //addr不加get、set方法，使用构造器注入。
 38     private String addr;
 39     
 40     
 41     
 42     /**
 43      * 无参数构造
 44      */
 45     public Person() {
 46         super();
 47     }
 48     
 49     /**
 50      * 参数构造。
 51      * @param addr
 52      */
 53     public Person(String addr) {
 54         this.addr = addr;
 55     }
 56     
 57     
 58     public String getPname() {
 59         return pname;
 60     }
 61     public void setPname(String pname) {
 62         this.pname = pname;
 63     }
 64     public int getAge() {
 65         return age;
 66     }
 67     public void setAge(int age) {
 68         this.age = age;
 69     }
 70     public List<String> getLoves() {
 71         return loves;
 72     }
 73     public void setLoves(List<String> loves) {
 74         this.loves = loves;
 75     }
 76     public Set<String> getBooks() {
 77         return books;
 78     }
 79     public void setBooks(Set<String> books) {
 80         this.books = books;
 81     }
 82      
 83     public Map<String, String> getHeros() {
 84         return heros;
 85     }
 86 
 87     public void setHeros(Map<String, String> heros) {
 88         this.heros = heros;
 89     }
 90     
 91     public Properties getPalaces() {
 92         return palaces;
 93     }
 94 
 95     public void setPalaces(Properties palaces) {
 96         this.palaces = palaces;
 97     }
 98 
 99     public Singer getSinger() {
100         return singer;
101     }
102     public void setSinger(Singer singer) {
103         this.singer = singer;
104     }
105     public Dancer getDancer() {
106         return dancer;
107     }
108 
109     public void setDancer(Dancer dancer) {
110         this.dancer = dancer;
111     }
112     public Emp getEmp() {
113         return emp;
114     }
115 
116     public void setEmp(Emp emp) {
117         this.emp = emp;
118     }
119 
120     @Override
121     public String toString() {
122         return "Person [pname=" + pname + ", age=" + age + ", loves=" + loves
123                 + ", books=" + books + ", heros=" + heros + ", palaces="
124                 + palaces + ", singer=" + singer + ", dancer=" + dancer
125                 + ", emp=" + emp + ", addr=" + addr + "]";
126     }
127 }

Emp实体类：

 1 package com.ioc;
 2 
 3 import com.aop.Singer;
 4 /**
 5  * 员工类。
 6  * @Emp.java
 7  * @author BlueLake
 8  * @2017-9-12 下午7:27:33
 9  */
10 public class Emp {
11     
12     private String ename;
13     private int age ;
14     private Singer singer;
15     
16     public String getEname() {
17         return ename;
18     }
19     public void setEname(String ename) {
20         this.ename = ename;
21     }
22     public int getAge() {
23         return age;
24     }
25     public void setAge(int age) {
26         this.age = age;
27     }
28     public Singer getSinger() {
29         return singer;
30     }
31     public void setSinger(Singer singer) {
32         this.singer = singer;
33     }
34     
35 }

唱歌类：

 1 package com.aop;
 2 /**
 3  * 唱歌类
 4  * @Singer.java
 5  * @author BlueLake
 6  * @2017-9-12 下午7:28:53
 7  */
 8 public class Singer {
 9 
10     public void sing(){
11         System.out.println("玖月奇迹--你若盛开~~~");
12     }
13 }

 

跳舞类：

 1 package com.adviceAop;
 2 /**
 3  * 跳舞类
 4  * @Dancer.java
 5  * @author BlueLake
 6  * @2017-9-12 下午7:29:14
 7  */
 8 public class Dancer {
 9 
10     public void  dance(String name){
11         System.out.println("杨丽萍来跳孔雀舞~~~"+name);
12 //        throw new RuntimeException("受伤了吗?");
13     }
14 }

 

二、配置applicationContext.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans
 3     xmlns="http://www.springframework.org/schema/beans"
 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 5     xmlns:p="http://www.springframework.org/schema/p"
 6     xmlns:aop="http://www.springframework.org/schema/aop"
 7     xsi:schemaLocation="http://www.springframework.org/schema/beans 
 8     http://www.springframework.org/schema/beans/spring-beans-3.1.xsd 
 9     http://www.springframework.org/schema/aop 
10     http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">
11 
12     <!-- spring基本注入  ，property的name名称要和类里的名称一致。 -->
13     <bean id="person" class="com.ioc.Person" autowire="byName">
14         <!-- 1.构造器注入， 使用constructor-arg标签，必须有这个构造方法 -->
15         <constructor-arg name="addr">
16             <value>祖籍钱塘</value>
17         </constructor-arg>
18         <!-- 2.set 方法注入   使用 property 标签-->
19         <property name="pname"> <value>项羽</value> </property>
20         <property name="age" value="27">  </property>
21         <property name="loves">
22             <list>
23                 <value>塞外骑马</value>
24                 <value>江南采莲</value>
25                 <value>剪烛西窗</value>
26             </list>
27         </property>
28         <property name="books">
29             <set>
30                 <value>小窗幽记</value>
31                 <value>围炉夜话</value>
32                 <value>菜根谭</value>
33             </set>
34         </property>
35         <property name="heros">
36             <map>
37                 <entry>
38                     <key> <value>曹操</value>    </key>
39                     <value>北魏</value>
40                 </entry>
41                 <entry>
42                     <key> <value>赵云</value>    </key>
43                     <value>西蜀</value>
44                 </entry>
45                 <entry>
46                     <key> <value>周瑜</value>    </key>
47                     <value>东吴</value>
48                 </entry>
49             </map>
50         </property>
51         <property name="palaces">
52             <props>
53                 <prop key="china">故宫</prop>
54                 <prop key="russia">克里姆林宫</prop>
55                 <prop key="france">卢浮宫</prop>
56             </props>
57         </property>
58         
59         <!--  set注入，如果是引用类型，依赖注入 ,使用 ref 标签 -->
60         <property name="singer" >
61             <ref bean="singer"/>
62         </property>
63         <property name="dancer" ref="dancer"></property>
64         <!-- 3.自动注入 ，需要写set方法。-->
65         <!-- emp属性没有配置，会根据bean里的  autowire="byName" 自动注入 -->
66     </bean>
67     <!-- 使用p标签注入 ,基本属性直接写入值，依赖属性，指向id -->
68     <bean id="emp" class="com.ioc.Emp" p:ename="张良" p:age="25" p:singer-ref="singer"> 
69     </bean>
70     
71 </beans>

上面少了：<bean id="singer" class="com.aop.Singer"></bean>

　　　　<bean id="dancer" class="com.adviceAop.Dancer" ></bean>

 

三、测试类

 1 package com.ioc;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 
 6 import com.log4j.LoggerTest;
 7 /**
 8  * 测试注入代码
 9  */
10 public class PersonTest {
11 
12     public static void main(String[] args) {
13         //加载Spring配置文件
14         ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
15         //通过bean的  id和 类型，获取类对象
16         Person per = ac.getBean("person",Person.class);
17         System.out.println(per.toString());
18         //添加日志
19 //        LoggerTest.log.info(per.toString());
20         /*
21          * Person [pname=项羽, age=27, loves=[塞外骑马, 江南采莲, 剪烛西窗], 
22          *            books=[小窗幽记, 围炉夜话, 菜根谭], heros={曹操=北魏, 赵云=西蜀, 周瑜=东吴}, 
23          *         palaces={france=卢浮宫, china=故宫, russia=克里姆林宫}, 
24          *         [email protected],  [email protected], 
25          *         [email protected], addr=祖籍钱塘]
26          */
27         
28         //通过bean 的id获取类，再将Object 强转成对应的类型。
29         Emp emp = (Emp) ac.getBean("emp");
30         System.out.println(emp.getEname()+"\t"+emp.getAge());//张良    25
31     }
32 
33 }