Spring的注入方法小结

Spring的注入方法小结

1.setter注入:
beans.xml:
 

<? xml version="1.0" encoding="UTF-8" ?>

<!--
  - Application context definition for JPetStore's business layer.
  - Contains bean references to the transaction manager and to the DAOs in
  - dataAccessContext-local/jta.xml (see web.xml's "contextConfigLocation").
   -->
< beans  xmlns ="http://www.springframework.org/schema/beans"
        xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:aop ="http://www.springframework.org/schema/aop"
        xmlns:tx ="http://www.springframework.org/schema/tx"
        xsi:schemaLocation ="
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
            http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd" >
    
     < bean  name ="userDao"  class ="com.linying.dao.UserDao" ></ bean >
    
     < bean  name ="userDomain"  class ="com.linying.domain.User" ></ bean >
    
     < bean  name ="userAction"  class ="com.linying.service.UserAction" >
         <property name="user" ref="userDomain"></property>
        <property name="userDao" ref="userDao"></property>     
     </ bean >     
    
</ beans >

User.java:
 

package  com.linying.domain;

/**
 * 领域对象
 * 
 *  @author  Ying-er
 * @time 2010-6-20 上午10:01:05
 * @mail [email protected]
 *  @version  1.00
  */
public  class  User {
     private  int  id;

     private  String name;

     private  String password;

     public  User() {
        System.out.println( " User构造 " );
    }

     public  String getName() {
         return  name;
    }

     public  void  setName(String name) {
         this .name  =  name;
    }

     public  String getPassword() {
         return  password;
    }

     public  void  setPassword(String password) {
         this .password  =  password;
    }

     public  int  getId() {
         return  id;
    }

     public  void  setId( int  id) {
         this .id  =  id;
    }
}

UserDao.java:
 

package  com.linying.dao;

import  com.linying.domain.User;

/**
 * UserDao
 * 
 *  @author  Ying-er
 * @time 2010-6-20 上午10:17:55
 * @mail [email protected]
 *  @version  1.00
  */
public  class  UserDao {
     public  UserDao() {
        System.out.println( " UserDao构造 " );
    }

     public  void  insert(User user) {
        System.out.println( " 执行insert方法 " );
    }
}

UserAction.java:
 

package  com.linying.service;

import  com.linying.dao.UserDao;
import  com.linying.domain.User;

/**
 * UserAction
 * 
 *  @author  Ying-er
 * @time 2010-6-20 上午10:28:16
 * @mail [email protected]
 *  @version  1.00
  */
public  class  UserAction {
     private  User user;

     private  UserDao userDao;

     public  UserAction() {
        System.out.println( " UserAction构造 " );
    }

     /**
     * 保存User对象
     * 
      */
     public  void  saveUser() {
        userDao.insert(user);
        System.out.println( " saveUser方法被调用 " );
    }

     public void setUser(User user) {
        this.user = user;
        System.out.println("setUser方法被调用");
    }

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
        System.out.println("setUserDao方法被调用");
    }

}

测试——Main.java:
 

package  com.linying;

import  org.springframework.beans.factory.BeanFactory;
import  org.springframework.context.support.ClassPathXmlApplicationContext;

import  com.linying.service.UserAction;

/**
 * 测试程序入口
 * 
 *  @author  Ying-er
 * @time 2010-6-20 上午11:20:24
 * @mail [email protected]
 *  @version  1.00
  */
public  class  Main {

     /**
     *  @param  args
      */
     public  static  void  main(String[] args) {
         //  TODO Auto-generated method stub
        BeanFactory bf  =  (BeanFactory) ( new  ClassPathXmlApplicationContext(
                 " beans.xml " ));

        UserAction userAction  =  (UserAction) bf.getBean( " userAction " );
        userAction.saveUser();

    }

}

控制台输出：
UserDao构造
User构造
UserAction构造
setUser方法被调用
setUserDao方法被调用
执行insert方法
saveUser方法被调用

2.静态工厂注入：
修改beans.xml:
 

    <bean name="userDao" class="com.linying.factory.DaoFactory" factory-method="getUserDao"></bean>
    
     < bean  name ="userDomain"  class ="com.linying.domain.User" ></ bean >
    
     < bean  name ="userAction"  class ="com.linying.service.UserAction" >
         < property  name ="user"  ref ="userDomain" ></ property >
         < property  name ="userDao"  ref ="userDao" ></ property >     
     </ bean >

增加工厂：
 

package  com.linying.factory;

import  com.linying.dao.UserDao;
/**
 * Dao静态工厂
 *  @author  Ying-er
 * @time 2010-6-20 下午04:23:25
 * @mail [email protected]
 *  @version  1.00
  */
public  class  DaoFactory {
     public  static  UserDao getUserDao(){
         return  new  UserDao();
    }
}

控制台输出：
UserDao构造
User构造
UserAction构造
setUser方法被调用
setUserDao方法被调用
执行insert方法
saveUser方法被调用

3.实例工厂注入：
修改beans.xml：
 

     <bean name="daoFactory" class="com.linying.factory.DaoFactory"></bean>
    
     <bean name="userDao" factory-bean="daoFactory" factory-method="getUserDao"></bean>
    
     < bean  name ="userDomain"  class ="com.linying.domain.User" ></ bean >
    
     < bean  name ="userAction"  class ="com.linying.service.UserAction" >
         < property  name ="user"  ref ="userDomain" ></ property >
         < property  name ="userDao"  ref ="userDao" ></ property >     
     </ bean >

增加实例工厂：
 

package  com.linying.factory;

import  com.linying.dao.UserDao;
/**
 * Dao实例工厂
 *  @author  Ying-er
 * @time 2010-6-20 下午04:23:25
 * @mail [email protected]
 *  @version  1.00
  */
public  class  DaoFactory {
     public  UserDao getUserDao(){
         return  new  UserDao();
    }
}

控制台输出：
UserDao构造
User构造
UserAction构造
setUser方法被调用
setUserDao方法被调用
执行insert方法
saveUser方法被调用

4.构造器注入：
修改beans.xml:
 

    < bean  name ="userDao"  class ="com.linying.dao.UserDao" ></ bean >
    
     < bean  name ="userDomain"  class ="com.linying.domain.User" ></ bean >
    
     < bean  name ="userAction"  class ="com.linying.service.UserAction" >
         <constructor-arg ref="userDomain"></constructor-arg>
        <constructor-arg ref="userDao"></constructor-arg>     
     </ bean >    

修改UserAction.java:
 

package  com.linying.service;

import  com.linying.dao.UserDao;
import  com.linying.domain.User;

/**
 * UserAction
 * 
 *  @author  Ying-er
 * @time 2010-6-20 上午10:28:16
 * @mail [email protected]
 *  @version  1.00
  */
public  class  UserAction {
     private  User user;

     private  UserDao userDao;

     public  UserAction() {
        System.out.println( " UserAction构造 " );
    }

     public UserAction(User user,UserDao userDao){
        System.out.println("UserAction构造(有参构造)");
        this.user = user;
        this.userDao = userDao;
    }
     /**
     * 保存User对象
     * 
      */
     public  void  saveUser() {
        userDao.insert(user);
        System.out.println( " saveUser方法被调用 " );
    }

//     public void setUser(User user) {
//         this.user = user;
//         System.out.println("setUser方法被调用");
//     }
//
//     public void setUserDao(UserDao userDao) {
//         this.userDao = userDao;
//         System.out.println("setUserDao方法被调用");
//     }

}

控制台输出：
UserDao构造
User构造
UserAction构造(有参构造)
执行insert方法
saveUser方法被调用

5.集合注入：
beans.xml:
 

     < bean  name ="daoFactory"  class ="com.linying.factory.DaoFactory" ></ bean >

     < bean  name ="userDao"  factory-bean ="daoFactory"
        factory-method ="getUserDao" >
     </ bean >

     < bean  name ="userDomain"  class ="com.linying.domain.User" >
         < property  name ="id" >
             < value > 1 </ value >
         </ property >
         < property  name ="name"  value ="admin" ></ property >
         < property  name ="password"  value ="123" ></ property >
         <!-- property name="birthday" value="1987-06-20"></property> -->
         < property  name ="listDemo" >
            <list>
                <value>list-1</value>
                <value>list-2</value>
            </list>
         </ property >
         < property  name ="setDemo" >
            <set>
                <value>set-1</value>
                <value>set-2</value>
            </set>
         </ property >
         < property  name ="mapDemo" >
            <map>
                <entry key="k1" value="v1"></entry>
                <entry key="k2" value="v2"></entry>
            </map>
         </ property >
     </ bean >

     < bean  name ="userAction"  class ="com.linying.service.UserAction" >
         < property  name ="user"  ref ="userDomain" ></ property >
         < property  name ="userDao"  ref ="userDao" ></ property >
     </ bean >

User.java:
 

package  com.linying.domain;

import  java.util.Date;
import  java.util.List;
import  java.util.Map;
import  java.util.Set;

/**
 * 领域对象
 * 
 *  @author  Ying-er
 * @time 2010-6-20 上午10:01:05
 * @mail [email protected]
 *  @version  1.00
  */
public  class  User {
     private  int  id;

     private  String name;

     private  String password;

     private  Date birthday;

    private List<String> listDemo;

    private Set<String> setDemo;

    private Map<String, String> mapDemo;

     public  User() {
        System.out.println( " User构造 " );
    }

     public  String getName() {
         return  name;
    }

     public  void  setName(String name) {
         this .name  =  name;
    }

     public  String getPassword() {
         return  password;
    }

     public  void  setPassword(String password) {
         this .password  =  password;
    }

     public  int  getId() {
         return  id;
    }

     public  void  setId( int  id) {
         this .id  =  id;
    }

     public  Date getBirthday() {
         return  birthday;
    }

     public  void  setBirthday(Date birthday) {
         this .birthday  =  birthday;
    }

     public  List < String >  getListDemo() {
         return  listDemo;
    }

     public  void  setListDemo(List < String >  listDemo) {
         this .listDemo  =  listDemo;
    }

     public  Map < String, String >  getMapDemo() {
         return  mapDemo;
    }

     public  void  setMapDemo(Map < String, String >  mapDemo) {
         this .mapDemo  =  mapDemo;
    }

     public  Set < String >  getSetDemo() {
         return  setDemo;
    }

     public  void  setSetDemo(Set < String >  setDemo) {
         this .setDemo  =  setDemo;
    }

}

Main.java:
 

package  com.linying;

import  org.springframework.beans.factory.BeanFactory;
import  org.springframework.context.support.ClassPathXmlApplicationContext;

import  com.linying.service.UserAction;

/**
 * 测试程序入口
 * 
 *  @author  Ying-er
 * @time 2010-6-20 上午11:20:24
 * @mail [email protected]
 *  @version  1.00
  */
public  class  Main {

     /**
     *  @param  args
      */
     public  static  void  main(String[] args) {
         //  TODO Auto-generated method stub
        BeanFactory bf  =  (BeanFactory) ( new  ClassPathXmlApplicationContext(
                 " beans.xml " ));

        UserAction userAction  =  (UserAction) bf.getBean( " userAction " );
        System.out.println(userAction.getUser().getId());
        System.out.println(userAction.getUser().getName());
        System.out.println(userAction.getUser().getPassword());
//         System.out.println(userAction.getUser().getBirthday());
        System.out.println(userAction.getUser().getListDemo());
        System.out.println(userAction.getUser().getSetDemo());
        System.out.println(userAction.getUser().getMapDemo());
    }
}

控制台输出：
UserDao构造
User构造
UserAction构造
setUser方法被调用
setUserDao方法被调用
1
admin
123
[list-1, list-2]
[set-1, set-2]
{k1=v1, k2=v2}