主要有兩種方式:

專業(yè)從事成都網(wǎng)站設計、做網(wǎng)站,高端網(wǎng)站制作設計,小程序開發(fā),網(wǎng)站推廣的成都做網(wǎng)站的公司。優(yōu)秀技術團隊竭力真誠服務，采用html5+CSS3前端渲染技術，成都響應式網(wǎng)站建設，讓網(wǎng)站在手機、平板、PC、微信下都能呈現(xiàn)。建站過程建立專項小組，與您實時在線互動，隨時提供解決方案，暢聊想法和感受。

1.通過實現(xiàn)InitializingBean接口的afterPropertiesSet()方法,在方法中處理業(yè)務

2.在配置文件中配置init-method

實現(xiàn)方式1:InitializingBean

@Component

public class InitializingMyBean implements InitializingBean {

? ? @Autowired

private UserRepository userRepository;

@Override

public void afterPropertiesSet() throws Exception {

System.out.println("》》》新增用戶《《《 ");

User user =new User();

user.setName("admin");

user.setPassword("admin123");

user.setAge("23");

user.setSex("男");

User add? = userRepository.save(user);

if(!StringUtils.isEmpty(add)){

System.out.println("新增用戶成功！");

}else{

System.out.println("新增用戶失敗！");

}

}

?

?

}

2.配置文件 ：init-method

xml version="1.0" encoding="UTF-8"?>DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN""http://www.springframework.org/dtd/spring-beans.dtd">

?init-method="init">bean>beans>

3.兩種方式的區(qū)別:

實現(xiàn)InitializingBean接口是直接調用afterPropertiesSet方法，比通過反射調用init-method指定的方法效率相對來說要高點。但是init-method方式消除了對spring的依賴

4.注意:如果在spring初始化bean的時候，如果該bean是實現(xiàn)了InitializingBean接口，并且同時在配置文件中指定了init- method，

?* 系統(tǒng)則是先調用afterPropertiesSet方法，然后在調用init-method中指定的方法

5.InitializingBean和init-mthod同時執(zhí)行的原理:

詳見：org.springframework.beans.factory.support包下的抽象類AbstractAutowireCapableBeanFactory

主要處理代碼如下:

/**

* Give a bean a chance to react now all its properties are set,

* and a chance to know about its owning bean factory (this object).

* This means checking whether the bean implements InitializingBean or defines

* a custom init method, and invoking the necessary callback(s) if it does.

* @param beanName the bean name in the factory (for debugging purposes)

* @param bean the new bean instance we may need to initialize

* @param mbd the merged bean definition that the bean was created with

* (can also be {@code null}, if given an existing bean instance)

* @throws Throwable if thrown by init methods or by the invocation process

* @see #invokeCustomInitMethod

*/

protected void invokeInitMethods(String beanName, final Object bean, RootBeanDefinition mbd)

throws Throwable {

? ? ? ? ? ? //獲取當前bean是否實現(xiàn)了InitializingMyBean接口,如果實現(xiàn)了就執(zhí)行afterPropertiesSet方法

boolean isInitializingBean = (bean instanceof InitializingBean);

if (isInitializingBean && (mbd == null || !mbd.isExternallyManagedInitMethod("afterPropertiesSet"))) {

if (logger.isDebugEnabled()) {

logger.debug("Invoking afterPropertiesSet() on bean with name '" + beanName + "'");

}

if (System.getSecurityManager() != null) {

try {

AccessController.doPrivileged(new PrivilegedExceptionAction