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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                自動裝配: @Autowired使用自動裝配的方式。將bean容器里面的值自動注入到bean中。 案例: 1、 Java文件: ~~~ public class UserAction { @Autowired private UserService userService; //set方法還是不能缺的,因為autowired也是用setter注入的 public void setUserService(UserService userService) { this.userService = userService; } public void addUser(){ userService.HelloWorld(); } } ~~~ 2、 Xml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/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd" default-autowire="byName"> <bean id="userDao" class="com.spring.dao.UserDaoImpl"></bean> <bean id="userService" class="com.spring.service.UserServiceImpl" scope="prototype"> <property name="userDao" ref="userDao"></property> </bean> <!-- 不用再指定property,這里指明autowire就可以了。 --> <bean id="userAction" class="com.spring.action.UserAction" autowire="byName"> </bean> </beans> ~~~ 值得注意的是。上面的這個byName還有一種方式為byType。 還有它標注的范圍。不難看到在xml文件的聲明部分有一個約束。這個是全局的約束。是為了避免繁瑣性的重復工作而設置的,我想很容易看懂。在此不多說了。
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