本文共 4144 字，大约阅读时间需要 13 分钟。

Spring——Spring依赖注入DI（各种类型的元素注入）、p命名空间、c命名空间

一、各种类型的元素注入

实体类pojo

package com.muhan.pojo;import java.util.*;public class User {
       //常量    private String name;    //对象    private Teacher teacher;    //数组    private String[] books;    //list    private List list;    //Map    private Map map;    //Set    private Set set;    //null值    private String girlFriend=null;    //Properties    private Properties properties;    public String getName() {
           return name;    }    public void setName(String name) {
           this.name = name;    }    public Teacher getTeacher() {
           return teacher;    }    public void setTeacher(Teacher teacher) {
           this.teacher = teacher;    }    public String[] getBooks() {
           return books;    }    public void setBooks(String[] books) {
           this.books = books;    }    public List getList() {
           return list;    }    public void setList(List list) {
           this.list = list;    }    public Map getMap() {
           return map;    }    public void setMap(Map map) {
           this.map = map;    }    public Set getSet() {
           return set;    }    public void setSet(Set set) {
           this.set = set;    }    public String getGirlFriend() {
           return girlFriend;    }    public void setGirlFriend(String girlFriend) {
           this.girlFriend = girlFriend;    }    public Properties getProperties() {
           return properties;    }    public void setProperties(Properties properties) {
           this.properties = properties;    }    @Override    public String toString() {
           return "User{" +                "name='" + name + '\'' +                ", teacher=" + teacher +                ", books=" + Arrays.toString(books) +                ", list=" + list +                ", map=" + map +                ", set=" + set +                ", girlFriend='" + girlFriend + '\'' +                ", properties=" + properties +                '}';    }}

Teacher

package com.muhan.pojo;public class Teacher {
       private String name;    public Teacher() {
       }    public Teacher(String name) {
           this.name = name;    }    public String getName() {
           return name;    }    public void setName(String name) {
           this.name = name;    }    @Override    public String toString() {
           return "Teacher{" +                "name='" + name + '\'' +                '}';    }}

在我们日常开发中最常用的是property标签setter注入方式，那么我们就使用setter注入完成各种元素（常量、对象、数组、List、Map、Set、null值、Properties）的注入

   
       
        
            
         
        
        
            
             
             
             
             
             
                 
                      
       
        西游记
                       
       
        水浒传
                       
       
        红楼梦
                       
       
        三国演义
                   
              
             
             
                 
                      
       
        list1
                       
       
        list2
                       
       
        list3
                       
       
        list4
                   
              
             
             
                 
              
             
             
                 
                      
       
        set1
                       
       
        set2
                       
       
        set3
                   
              
             
             
                 
              
             
             
                 
                      
       
        02165055
                       
       
        张三
                       
       
        信管1602
                   
              
         
    
   

二、c命名空间（构造器的注入）

注意：

xmlns:c="http://www.springframework.org/schema/c"

在xsi:schemaLocation中添加：

http://www.springframework.org/schema/c       http://www.springframework.org/schema/c/spring-c.xsd

二、p命名空间（属性的注入）

注意：

xmlns:c="http://www.springframework.org/schema/p"

在xsi:schemaLocation中添加：

http://www.springframework.org/schema/p     http://www.springframework.org/schema/p/spring-p.xsd

转载地址：http://ooiwi.baihongyu.com/