一、实例化Bean

1. 通过默认构造方法实创建Bean

public class Bean1 {    public Bean1() {        System.out.println(this.getClass().getSimpleName() + " has been created");    }}

2. 通过静态工厂方法创建Bean

public class Bean1Factory {    public static Bean1 createBean1() {        return new Bean1();    }}

3. 通过工厂实例方法创建Bean

public class Bean2Factory {    public Bean2 createBean2() {        return new Bean2();    } }

二、注入Bean

public class Bean3 {    private final Bean1 bean1;    private final String stringValue1;    private final Integer integerValue1;    private Bean2 bean2;    private String stringValue2;    private Integer integerValue2;    private List
     
       stringList;    private List
      
        bean2List;    private Map
       
         simpleMap;    private Map
        
          ObjectMap;    private Set
         
           stringSet;    private Set
          
            bean2Set; private Properties properties; private String stringValue3; public Bean3(Bean1 bean1, String stringValue1, Integer integerValue1) { } public Bean3(Bean1 bean1, String stringValue1, Integer integerValue1) { this.bean1 = bean1; this.stringValue1 = stringValue1; this.integerValue1 = integerValue1; System.out.println(this.getClass().getSimpleName() + " has been created"); } //get/set ......}
          
         
        
       
      
     

1. 通过构造方法注入Bean

其中，index、name、type无需全部都有，可区分是哪个参数即可。

简化版

2. 通过set方法注入Bean

简化版

3. 集合类型注入Bean

List

     
         
              
                   
        
         ccccc
                    
        
         ddddd
                
           
          
              
                   
                    
                
           
      
     

Map

Set

     
         
              
                   
        
         eeeee
                    
        
         fffff
                
           
          
              
                   
                
           
      
     

Properties

         
              
                   
        
         value1
                    
        
         value2
                
           
      
     

4. null值注入Bean

5. 注入内部bean