这是它用于存储有关特定用户的详细信息的bean类。它有两个名为init和destroy的方法。当bean被初始化和销毁时需要调用它。什么时候在spring中调用bean的destroy方法?
package org.springframework.HelloWorld.beans;
public class User {
private int userId;
private String userName;
private String address;
private String mobileNumber;
public User() {
super();
}
public User(int userId, String userName, String address, String mobileNumber) {
super();
this.userId = userId;
this.userName = userName;
this.address = address;
this.mobileNumber = mobileNumber;
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getMobileNumber() {
return mobileNumber;
}
public void setMobileNumber(String mobileNumber) {
this.mobileNumber = mobileNumber;
}
@Override
public String toString() {
return "User [userId=" + userId + ", userName=" + userName
+ ", address=" + address + ", mobileNumber=" + mobileNumber
+ "]";
}
public void init(){
System.out.println("Initialized");
}
public void destroy(){
System.out.println("Destroyed");
}
}
这是我用过的主要方法。这里我从Beans.xml文件中获取User对象。
public static void main(String[] args) {
@SuppressWarnings("resource")
ApplicationContext ctx = new ClassPathXmlApplicationContext("Beans.xml");
User user = (User) ctx.getBean("user");
System.out.println(user);
user.setUserName("Gnanadurai Asudoss");
user.setAddress("Chxxxxx");
System.out.println(user);
user = (User) ctx.getBean("user");
System.out.println(user);
user=null;
}
下面是Beans.xml文件,这里我提到了bean,init方法和destroy方法。
<bean id="user" class="org.springframework.HelloWorld.beans.User" init-method="init" destroy-method="destroy">
\t \t <property name="userId" value="1"></property>
\t \t <property name="userName" value="Gnanadurai"></property>
\t \t <property name="address" value="Saxxxx"></property>
\t \t <property name="mobileNumber" value="xxxxxxxx49"></property>
\t </bean>
这是我得到的输出。在这里你可以看到初始化方法被调用,并且不调用Destroy方法。
Initialized
User [userId=1, userName=Gnanadurai, address=Saxxx, mobileNumber=xxxxxxxx49]
User [userId=1, userName=Gnanadurai Asudoss, address=Chxxxx, mobileNumber=xxxxxxxx49]
User [userId=17505, userName=Gnanadurai Asudoss, address=Chxxxx, mobileNumber=xxxxxxxx49]
所以我不知道何时销毁方法会被调用..你能告诉我什么时候它会被调用。给我举个例子。
谢谢...
是的,它的工作......感谢兄弟...... – 2015-03-02 11:29:12