spring IOC

1. xml方式实现IOC



beans.xml

<?xml version="1.0" encoding="UTF-8"?>
<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-2.5.xsd"> 
<bean id="id_personDao" class="cn.sjtu.service.PersonDao" />

<!-- scope="prototype" lazy-init="true -->
<bean id="id_personService" class="cn.sjtu.service.PersonServiceBean"
init-method="init" destroy-method="destroy">

<property name="personDao" ref="id_personDao"></property>

<constructor-arg index="0" ref="id_personDao"></constructor-arg>
<constructor-arg index="1" value="chen"></constructor-arg>

<property name="sets">
<set>
<value>"AA"</value>
<value>"BB"</value>
<value>"CC"</value>
</set>
</property>
<property name="lists">
<set>
<value>"AAA"</value>
<value>"BBB"</value>
<value>"CCC"</value>
</set>
</property>
<property name="maps">
<map>
<entry key="key1" value="value1"></entry>
<entry key="key2" value="value2"></entry>
<entry key="key3" value="value3"></entry>
</map>
</property>
</bean>

</beans>

PersonDao.java

package cn.sjtu.service;

public class PersonDao {
public void add() {
System.out.println("this is PersonDao add method");
}
}

PersonService.java

package cn.sjtu.service;

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

public interface PersonService {

public abstract void save();
public abstract void add();
public abstract Set<String> getSets();
public abstract List<String> getLists();
public abstract Map<String, String> getMaps();
}

PersonServiceBean.java

package cn.sjtu.service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class PersonServiceBean implements PersonService {

private String name;
private PersonDao personDao;
private Set<String> sets = new HashSet<String>();
private List<String> lists = new ArrayList<String>();
private Map<String, String> maps = new HashMap<String, String>();

public Map<String, String> getMaps() {
return maps;
}

public void setMaps(Map<String, String> maps) {
this.maps = maps;
}

public List<String> getLists() {
return lists;
}

public void setLists(List<String> lists) {
this.lists = lists;
}

public Set<String> getSets() {
return sets;
}

public void setSets(Set<String> sets) {
this.sets = sets;
}

public PersonDao getPersonDao() {
return personDao;
}

public void setPersonDao(PersonDao personDao) {
this.personDao = personDao;
}

@Override
public void save() {
System.out.println("this is save method");
}

public PersonServiceBean() {
System.out.println("instanced");
}

public PersonServiceBean(PersonDao personDao, String name) {
System.out.println("instanced2"+name);
personDao.add();
}

public void init() {
System.out.println("this is init method");
}

public void destroy() {
System.out.println("this is destroy method");
}

public void add() {
personDao.add();
}
}

test1.java

package cn.sjtu.spring.test;

import static org.junit.Assert.*;

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

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.sjtu.service.PersonService;

public class test1 {

@Test
public void instanceSpring() {
AbstractApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
PersonService personServiceInstance = (PersonService) ctx.getBean("id_personService");

/*personServiceInstance.add();
Set<String> sets = personServiceInstance.getSets();
List<String> lists = personServiceInstance.getLists();
Map<String, String> maps = personServiceInstance.getMaps();
System.out.println(sets.toString());
System.out.println(lists.toString());
System.out.print(maps.toString());*/

ctx.close();
}

}

2. 注释方式实现IOC



beans.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd"> <context:annotation-config/>

<context:component-scan base-package="cn.sjtu"/> <!--这种方法配合component连bean都不用写 -->

<!--
<bean id="id_personDao" class="cn.sjtu.service.PersonDao" />

<bean id="id_personService" class="cn.sjtu.service.PersonServiceBean" />
-->

</beans>

PersonDao.java

package cn.sjtu.service;

import org.springframework.stereotype.Component;

@Component("id_personDao")
public class PersonDao {
public void add() {
System.out.println("this is PersonDao add method");
}
}

PersonService.java

package cn.sjtu.service;

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

public interface PersonService {

public abstract void save();
public abstract void add();

}

PersonServiceBean.java

package cn.sjtu.service;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;

import org.springframework.stereotype.Component;

@Component("id_personService")
public class PersonServiceBean implements PersonService {

private String name;
@Resource(name="id_personDao") private PersonDao personDao; //不需要get,set方法
private Set<String> sets = new HashSet<String>();
private List<String> lists = new ArrayList<String>();
private Map<String, String> maps = new HashMap<String, String>();

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

@Override
public void save() {
System.out.println("this is save method");
}

public PersonServiceBean() {
System.out.println("instanced");
}

public PersonServiceBean(PersonDao personDao, String name) {
System.out.println("instanced2"+name);
personDao.add();
}

@PostConstruct
public void init() {
System.out.println("this is init method");
}

@PreDestroy
public void destroy() {
System.out.println("this is destroy method");
}

public void add() {
personDao.add();
}
}

test1.java

package cn.sjtu.spring.test;

import static org.junit.Assert.*;

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

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.sjtu.service.PersonService;

public class test1 {

@Test
public void instanceSpring() {
AbstractApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
PersonService personServiceInstance = (PersonService) ctx.getBean("id_personService");

/*personServiceInstance.add();
Set<String> sets = personServiceInstance.getSets();
List<String> lists = personServiceInstance.getLists();
Map<String, String> maps = personServiceInstance.getMaps();
System.out.println(sets.toString());
System.out.println(lists.toString());
System.out.print(maps.toString());*/

personServiceInstance.add();
ctx.close();
}

}