spring 配置文件初始执行方法

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本文介绍了一种使用多播协议的SyncManager类实现，用于服务器端的同步管理。通过设置组IP和端口，该类能够创建多播套接字并监听指定的IP地址和端口号。此外，它还提供了发送通知消息的功能，通过多播将消息广播到同一网络内的所有客户端。

<bean id="syncManager" class="com.moto.sqm.util.SyncManager"
  init-method="run">
  <property name="group_ip">
   <value>${groupip}</value>
  </property>
  <property name="group_port">
   <value>${groupport}</value>
  </property>
</bean>

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.MulticastSocket;
import java.net.UnknownHostException;

import javax.swing.JOptionPane;

public class SyncManager {

private String group_ip;
private int group_port;

public void setGroup_ip(String group_ip) {
this.group_ip = group_ip;
}

public void setGroup_port(int group_port) {
this.group_port = group_port;
}

private MulticastSocket multicastSocket;

/*
* public void run() { System.out.println("server start......."); try {
* InetAddress group = InetAddress.getByName(group_ip); multicastSocket =
* new MulticastSocket(group_port); multicastSocket.joinGroup(group); byte[]
* data = new byte[50]; // 鏈～婊＄┖闂翠細琚?濉厖锛屽鏋滄暟鎹暱搴﹁秴鍑烘暟缁勫垯瓒呭嚭鐨勬暟鎹蹇界暐 DatagramPacket
* packet = new DatagramPacket(data, data.length); } catch (Exception e) {
* e.printStackTrace(); return; }
*
* System.out.println("sync manager listen on " + group_ip + ":" +
* group_port + " succ ][][][][][");
*
* }
*
* public void send_notify_msg(String msg) { DatagramPacket packet = new
* DatagramPacket(msg.getBytes(), msg.length()); try {
* multicastSocket.send(packet); } catch (IOException e) {
* e.printStackTrace(); }
*
* }
*/

public void run() {
  try {
   multicastSocket = new MulticastSocket();
  } catch (IOException e) {
   e.printStackTrace();
  }
}

public void send_notify_msg(String msg) {
  try {
   byte[] data = msg.getBytes();
   InetAddress group = InetAddress.getByName(group_ip);
   DatagramPacket packet = new DatagramPacket(data, data.length,
     group, group_port);
   multicastSocket.send(packet);
   System.out.println("send ok");
   // Thread.sleep(1000);
  } catch (IOException ex) {
   // JOptionPane.showMessageDialog(null, "multicast error");
   ex.printStackTrace();
  }
}

}