Spring依赖注入的两种方式是（ ）和（ ）。 Spring的注入方式和依赖注入方式有什么区别
Spring3.0\u6846\u67b6\u4e2d\u4f9d\u8d56\u6ce8\u5165\u4e3b\u8981\u6709\u51e0\u79cd\u65b9\u5f0f3\u79cd\u65b9\u6cd5
1\u3002\u6784\u9020\u5668\u6ce8\u5165
public class xx {
private Manager manage;
public xx(Manager manage){
this.manage= manage;
}
}
2.setter \u65b9\u6cd5\u6ce8\u5165
public class xx {
private Manager manage;
public void setManager(Manager manage){
this.manage= manage;
}
}
3.\u63a5\u53e3\u6ce8\u5165
public interface Manager{
public void manage(Business business);
}
public class xx {
private Business business;
public void manage(Business business){
this.business = business;
}
}
Type1 \u63a5\u53e3\u6ce8\u5165
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public class ClassA {
private InterfaceB clzB;
public init() {
Ojbect obj =
Class.forName(Config.BImplementation).newInstance();
clzB = (InterfaceB)obj;
}
\u2026\u2026
}
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Apache Avalon\u662f\u4e00\u4e2a\u5178\u578b\u7684Type1\u578bIOC\u5bb9\u5668\u3002
Type2\u6784\u9020\u5b50\u6ce8\u5165
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public class DIByConstructor {
private final DataSource dataSource;
private final String message;
public DIByConstructor(DataSource ds, String msg) {
this.dataSource = ds;
this.message = msg;
}
\u2026\u2026
}
1、Spring通过DI（依赖注入）实现IOC（控制反转），常用的注入方式主要有三种：构造方法注入，setter注入，基于注解的注入。
2、如果题目里只有两个空，那就是setter注入（也就是通过配置文件）和注解注入。
setter注入的写法（配置文件）
<!-- 注册userService -->
<bean id="userService" class="com.lyu.spring.service.impl.UserService">
<!-- 写法一 -->
<!-- <property name="UserDao" ref="userDaoMyBatis"></property> -->
<!-- 写法二 -->
<property name="userDao" ref="userDaoMyBatis"></property>
</bean>
<!-- 注册mybatis实现的dao -->
<bean id="userDaoMyBatis" class="com.lyu.spring.dao.impl.UserDaoMyBatis"></bean>
基于注解的注入
@Resource
@Qualifier("userDaoMyBatis")
private IUserDao userDao;
xml配置
注解
下面两种注解的区别：
@Autowired：Spring注解
@Resource：java规范注解
spring官网文档明确记载
set注入和构造注入
1，Set注入 2，构造注入
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