第一種：XML裝配

xml裝配有兩種方式：

第一種：利用有參構(gòu)造方法注入

User類：

package com.liu.xml;import java.util.List; //xml裝配bean的兩種方式 public class User {private String username;private Integer password;private List<String> list;//第一種：利用有差構(gòu)造方法裝配beanpublic User(String username, Integer password, List<String> list) {super();this.username = username;this.password = password;this.list = list;}@Overridepublic String toString() {return "User [username=" + username + ", password=" + password + ", list=" + list + "]";}}

ApplicationContext.xml配置文件：

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans-4.3.xsd"><!-- 有參構(gòu)造方法注入裝配user --><bean id = "user2" class = "com.liu.xml.User"><constructor-arg index = "0" value = "lisi"></constructor-arg><constructor-arg index = "1" value = "123456"></constructor-arg><constructor-arg><!-- 注入list --><list><value>listvalue1</value><value>listvalue1</value><value>listvalue1</value></list></constructor-arg></bean></beans>

測試類：

package com.liu.xml;import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;public class XmlBeanTest {public static void main(String[] args) {//獲取配置文件路徑String xmlpath ="com/liu/xml/ApplicationContext.xml";//加載配置文件ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlpath);//輸出有參構(gòu)造方法注入的結(jié)果User user2 = (User) applicationContext.getBean("user2");System.out.println(user2);}}

第二種：利用無參構(gòu)造方法和setter方法注入

User類：

package com.liu.xml;import java.util.List; //xml裝配bean的兩種方式 public class User {private String username;private Integer password;private List<String> list;//第二種：無參構(gòu)造方法和setter方法注入public User() {super();}public void setUsername(String username) {this.username = username;}public void setPassword(Integer password) {this.password = password;}public void setList(List<String> list) {this.list = list;}@Overridepublic String toString() {return "User [username=" + username + ", password=" + password + ", list=" + list + "]";}}

ApplicationContext.xml配置文件：

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans-4.3.xsd"><!-- 無參構(gòu)造方法和setter裝配user --><bean id = "user1" class = "com.liu.xml.User"><property name="username" value = "zhangsan"></property><property name="password" value = "123456"></property><property name="list" ><!-- 注入list --><list><value>listvalue1</value><value>listvalue2</value><value>listvalue3</value></list></property></bean></beans>

測試類：

package com.liu.xml;import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;public class XmlBeanTest {public static void main(String[] args) {//獲取配置文件路徑String xmlpath ="com/liu/xml/ApplicationContext.xml";//加載配置文件ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlpath);//輸出無參構(gòu)造方法注入的結(jié)果User user1 = (User) applicationContext.getBean("user1");System.out.println(user1);}}

兩種方式的輸出結(jié)果：

User [username=zhangsan, password=123456, list=[listvalue1, listvalue2, listvalue3]] User [username=lisi, password=123456, list=[listvalue1, listvalue1, listvalue1]]

第二種：注解裝配

UserDao.java

package annotation;public interface UserDao {public void save();}

UserDaoImpl.java

package annotation;import org.springframework.stereotype.Repository;@Repository("userDao") public class UserDaoImpl implements UserDao {@Overridepublic void save() {// TODO Auto-generated method stubSystem.out.println("UserDao------save");}}

UserService.java

package annotation;public interface UserService {public void save();}

UserServiceImpl.java

package annotation;import javax.annotation.Resource;import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service;@Service("userService") public class UserServiceImpl implements UserService {//@Resource(name = "userDao") 兩種注解都可以 Resource是根據(jù)名稱注解 Autowired是自動注解@Autowiredprivate UserDao userDao;@Overridepublic void save() {// TODO Auto-generated method stubthis.userDao.save();System.out.println("UserSerevice-------save");}}

UserController.java：

package annotation;import javax.annotation.Resource;import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller;@Controller("controller") public class UserController {//@Resource(name = "userService")兩種注解都可以 Resource是根據(jù)名稱注解 Autowired是自動注解@Autowiredprivate UserService userService;public void save() {this.userService.save();System.out.println("UserController------save");}}

ApplicationContext.xml配置文件

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.3.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.3.xsd"><!--第一種方式 --><!-- 使用context命名空間，在配置文件中開啟對應的注解解析器 --><!-- 使用context命名空間的步驟1：添加xmlns:context="http://www.springframework.org/schema/context"2：添加 http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.3.xsd--><context:annotation-config></context:annotation-config><!-- 定義三個bean實例 --><bean id = "userDao" class = "annotation.UserDaoImpl"></bean> <bean id = "userService" class = "annotation.UserServiceImpl"></bean> <bean id = "userController" class = "annotation.UserController"> </bean><!-- 第二種方式 使用context命名空間。通知string掃描包自動對注解解析--><!-- <context:component-scan base-package="annotation"></context:component-scan> --> </beans>

ControllerTest.java測試類：

package annotation;import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;public class ControllerTest { //使用注解進行裝配public static void main(String[] args) {String xmlpath = "annotation/ApplicationContext.xml";ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlpath);//獲取UserController的實例UserController userController = (UserController) applicationContext.getBean("userController");//輸出UserController中的save方法userController.save();}}

輸出結(jié)果：

UserDao------save UserSerevice-------save UserController------save

第三種：自動裝配

UserDao.java：

package zidongzhuangpei;public interface UserDao {public void save();}

UserDaoImpl.java：

package zidongzhuangpei;import org.springframework.stereotype.Repository;@Repository("userDao") public class UserDaoImpl implements UserDao {@Overridepublic void save() {// TODO Auto-generated method stubSystem.out.println("UserDao------save");}}

UserService.java：

package zidongzhuangpei;public interface UserService {public void save();}

UserServiceImpl.java：

package zidongzhuangpei;import javax.annotation.Resource;import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service;@Service("userService") public class UserServiceImpl implements UserService {//@Resource(name = "userDao")@Autowiredprivate UserDao userDao;public void setUserDao(UserDao userDao) {this.userDao = userDao;}@Overridepublic void save() {// TODO Auto-generated method stubthis.userDao.save();System.out.println("UserSerevice-------save");}}

UserController.java：

package zidongzhuangpei;import javax.annotation.Resource;import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller;@Controller("controller") public class UserController {//@Resource(name = "userService")@Autowiredprivate UserService userService;public void setUserService(UserService userService) {this.userService = userService;}public void save() {this.userService.save();System.out.println("UserController------save");}}

ApplicationContext.xml配置文件：

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.3.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.3.xsd"><!-- 使用context命名空間，在配置文件中開啟對應的注解解析器 --><!-- 使用context命名空間的步驟1：添加xmlns:context="http://www.springframework.org/schema/context"2：添加 http://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.3.xsd--><context:annotation-config></context:annotation-config><!-- 定義三個bean實例 --><bean id = "userDao" class = "zidongzhuangpei.UserDaoImpl"></bean> <bean id = "userService" class = "zidongzhuangpei.UserServiceImpl" autowire="byName"></bean> <bean id = "userController" class = "zidongzhuangpei.UserController" autowire="byName"> </bean></beans>

ControllerTest.java測試類：

package zidongzhuangpei;import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext;public class ControllerTest { //使用注解進行裝配public static void main(String[] args) {String xmlpath = "zidongzhuangpei/ApplicationContext.xml";ApplicationContext applicationContext = new ClassPathXmlApplicationContext(xmlpath);//獲取UserController的實例UserController userController = (UserController) applicationContext.getBean("userController");//輸出UserController中的save方法userController.save();}}

運行結(jié)果：

UserDao------save UserSerevice-------save UserController------save

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