spring3.1--IOC(xml配置注入)

设置注入和构造注入

注入分为 设置注入和 构造注入

前面spring3中的例子是设值注入（包括简单类型，引用类型 ）

引用类型用ref，简单类型用value。

其他类型的设置注入

array ,List，Map，Set，Properties

package com.cn.service;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;

import com.cn.dao.DoSomeThingsOracleDao;

public class DoSomeThingsService {

    //删除属性的get,set方法
    private int intValue;
    private String y;
    private DoSomeThingsOracleDao dao;
    
    private int[] arrInt;
    
    private List<String> StrList;
    
    private Set<Long> setLong;
    
    private Map<String, Object> map;
    
    private Properties properties;

    private List<Map<String, Object>> a;
    
    
    public List<Map<String, Object>> getA() {
        return a;
    }

    public void setA(List<Map<String, Object>> a) {
        this.a = a;
    }

    public DoSomeThingsOracleDao getDao() {
        return dao;
    }

    public void setDao(DoSomeThingsOracleDao dao) {
        this.dao = dao;
    }

    public int[] getArrInt() {
        return arrInt;
    }

    public void setArrInt(int[] arrInt) {
        this.arrInt = arrInt;
    }

    public List<String> getStrList() {
        return StrList;
    }

    public void setStrList(List<String> strList) {
        StrList = strList;
    }

    public Set<Long> getSetLong() {
        return setLong;
    }

    public void setSetLong(Set<Long> setLong) {
        this.setLong = setLong;
    }

    public Map<String, Object> getMap() {
        return map;
    }

    public void setMap(Map<String, Object> map) {
        this.map = map;
    }

    public Properties getProperties() {
        return properties;
    }

    public void setProperties(Properties properties) {
        this.properties = properties;
    }

    public void add(){
        System.out.println("service do insert");
        dao.insert();
    }

    @Override
    public String toString() {
        return "DoSomeThingsService [dao=" + dao + ", arrInt=" + Arrays.toString(arrInt) + ", StrList=" + StrList
                + ", setLong=" + setLong + ", map=" + map + ", properties=" + properties + ", a=" + a + "]";
    }

    
}



<?xml version="1.0" encoding="UTF-8"?>
<!-- 增加约束文件 -->
<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="doSomeDao" class="com.cn.dao.DoSomeThingsOracleDao" />
    
    <bean id="doSomeService"  class="com.cn.service.DoSomeThingsService" >
        <property name="dao" ref="doSomeDao"/>
        <!-- array -->
        <property name="arrInt">
            <array>
                <value>5</value>
                <value>4</value>
            </array>
        </property>
        
        <!-- list -->
        <property name="StrList">
            <list>
                <value>test</value>
                <value>234</value>
            </list>
        </property>
        <!-- set -->
        <property name="setLong">
            <set>
                <value>4</value>
                <value>234</value>
            </set>
        </property>
        <!-- map -->
        <property name="map">
            <map>
                <entry key="gts" value-ref="doSomeDao"/>
            </map>
        </property>
        <!-- properties -->
        <property name="properties">
            <props>
                <prop key="lq">eee</prop>
            </props>
        </property>
        
        <property name="a">
            <list>
                <map>
                    <entry key="key1" value-ref="doSomeDao"/>
                    <entry key="key2" value-ref="doSomeDao"/>
                </map>
                <map>
                    <entry key="key3" value-ref="doSomeDao"/>
                    <entry key="key4" value-ref="doSomeDao"/>
                </map>
            </list>
        </property>
        
        
        
    </bean>
    
</beans>




DoSomeThingsService [dao=com.cn.dao.DoSomeThingsOracleDao@5a8e6209, arrInt=[5, 4], StrList=[test, 234], setLong=[4, 234], map={gts=com.cn.dao.DoSomeThingsOracleDao@5a8e6209}, properties={lq=eee}, a=[{key1=com.cn.dao.DoSomeThingsOracleDao@5a8e6209, key2=com.cn.dao.DoSomeThingsOracleDao@5a8e6209}, {key3=com.cn.dao.DoSomeThingsOracleDao@5a8e6209, key4=com.cn.dao.DoSomeThingsOracleDao@5a8e6209}]]

array 可以有三种方式。<array>，<list>，value

    <!-- array -->
        <property name="arrInt">
            <list>
                <value>5</value>
                <value>4</value>
            </list>
        </property>

        <!-- array -->
        <property name="arrInt" value="5,4,8"/>
        

构造注入

构造注入就是利用构造方法来进行属性赋值。

设置注入用的是属性的set方法。

package com.cn.service;

import com.cn.dao.DoSomeThingsOracleDao;

public class DoSomeThingsService {

    //删除属性的get,set方法
    private int intValue;
    private String y;
    private DoSomeThingsOracleDao dao;
    
    public DoSomeThingsService(int intValue,String y,DoSomeThingsOracleDao dao) {
        this.intValue = intValue;
        this.y = y;
        this.dao = dao;
    }
    
    public void add(){
        System.out.println("service do insert");
        dao.insert();
    }
    
    @Override
    public String toString() {
        return "DoSomeThingsService [intValue=" + intValue + ", y=" + y + ", dao=" + dao + "]";
    }
    
}




    <bean id="doSomeDao" class="com.cn.dao.DoSomeThingsOracleDao" />
    
    <bean id="doSomeService"  class="com.cn.service.DoSomeThingsService" >
        <constructor-arg name="intValue" value="6" />
        <constructor-arg name = "y" value ="test"/>
        <constructor-arg name = "dao" ref ="doSomeDao"/>
    </bean>



    public static void main(String[] args) {
        String resource = "applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(resource);
        
        DoSomeThingsService service=  (DoSomeThingsService) ac.getBean("doSomeService");
        System.out.println(service.toString());
        
    }



DoSomeThingsService [intValue=6, y=test, dao=com.cn.dao.DoSomeThingsOracleDao@eec5a4a]

也可以这么写

    <bean id="doSomeService"  class="com.cn.service.DoSomeThingsService" >
        <constructor-arg  index="0" value="6" />
        <constructor-arg  index="1" value ="test"/>
        <constructor-arg  index="2" ref ="doSomeDao"/>
    </bean>


或者

<!-- 省略index 之后，参数的顺序必须和构造函数的参数顺序一致-->

    <bean id="doSomeService"  class="com.cn.service.DoSomeThingsService" >
        <constructor-arg  value="6" />
        <constructor-arg  value ="test"/>
        <constructor-arg  ref ="doSomeDao"/>
    </bean>

自动注入

只有引用类型可以自动注入，由容器spring自动赋值。

有两种方式：

　　　　byName：根据引用类型的属性名字自动注入。配置文件中的id和属性名称一样，数据类型也一样，自动注入。

　　　　byType：根据类的全限定名称自动注入。java中，引用类型的数据类型和配置文件配置的bean 的class是同源关系，能自动注入。

　　　　　　同源关系：1类型一样；2父类和子类的关系；3接口与实现类的关系

自动注入--byName

package com.cn.service;

import com.cn.dao.DoSomeThingsOracleDao;

public class DoSomeThingsService {

    private DoSomeThingsOracleDao dao;

    public DoSomeThingsOracleDao getDao() {
        return dao;
    }

    public void setDao(DoSomeThingsOracleDao dao) {
        this.dao = dao;
    }

    @Override
    public String toString() {
        return "DoSomeThingsService [dao=" + dao + "]";
    }
    
}




    <bean id="dao" class="com.cn.dao.DoSomeThingsOracleDao" />
    
    <bean id="doSomeService"  class="com.cn.service.DoSomeThingsService" autowire="byName">
    </bean>



DoSomeThingsService [dao=com.cn.dao.DoSomeThingsOracleDao@cb644e]

byName 的 dao 的bean id 值必须和 service类中的属性名字一样。并且class是一样的类型

自动注入--byType

符合添加的对象只能有一个

    <bean id="oracleDao" class="com.cn.dao.DoSomeThingsOracleDao" />
    
    <bean id="doSomeService"  class="com.cn.service.DoSomeThingsService" autowire="byType">
    </bean>


DoSomeThingsService [dao=com.cn.dao.DoSomeThingsOracleDao@4bec1f0c]

byType对bean 的id 没有要求。

同源关系还需要再测试一下。