获取策略文件的Java服务器端代码import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.ServerSocket;import java.net.Socket;public class SecurityXMLServer implements Runnable {private ServerSocket server;private BufferedReader reader;private BufferedWriter writer;private String xml;public SecurityXMLServer() {    String path = "policyfile文件路径";    //此处的换成相应的读取xml文档的方式如dom或sax //xml = readFile(path, "UTF-8");   /**      注意此处xml文件的内容，为纯字符串，没有xml文档的版本号       */    xml="
     
       "       +"
      
       "    +"
      
      ";    System.out.println("policyfile文件路径: " + path);    System.out.println(xml);       //启动843端口    createServerSocket(843);    new Thread(this).start();}//启动服务器private void createServerSocket(int port){    try {   server = new ServerSocket(port);   System.out.println("服务监听端口：" + port);    } catch (IOException e) {   System.exit(1);    }}//启动服务器线程public void run(){    while (true) {   Socket client = null;   try {       //接收客户端的连接      client = server.accept();      InputStreamReader input = new InputStreamReader(client.getInputStream(), "UTF-8");      reader = new BufferedReader(input);      OutputStreamWriter output = new OutputStreamWriter(client.getOutputStream(), "UTF-8");      writer = new BufferedWriter(output);      //读取客户端发送的数据      StringBuilder data = new StringBuilder();      int c = 0;      while ((c = reader.read()) != -1)      {          if (c != '/0')         data.append((char) c);          else         break;      }      String info = data.toString();      System.out.println("输入的请求: " + info);            //接收到客户端的请求之后，将策略文件发送出去      if(info.indexOf("
     ") >=0)      {          writer.write(xml + "/0");          writer.flush();          System.out.println("将安全策略文件发送至: " + client.getInetAddress());      }      else      {          writer.write("请求无法识别/0");          writer.flush();          System.out.println("请求无法识别: "+client.getInetAddress());      }      client.close();   } catch (Exception e) {      e.printStackTrace();      try {          //发现异常关闭连接          if (client != null) {         client.close();         client = null;          }      } catch (IOException ex) {          ex.printStackTrace();      } finally {          //调用垃圾收集方法          System.gc();      }   }    }}//测试主函数public static void main(String[] args){    new SecurityXMLServer();}}  针对Socket的策略文件