请教各位会JAVA的大神

Question

请问各位JAVA大神，这源代码出了什么问题？
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.StringTokenizer;
/*** @author Robbin Fan ***/
public class IPBanner {
public static final String NETSTAT = "netstat -nt";
public static final String IP_INSERT = "iptables -I INPUT -i eth0 -j DROP -p tcp --dport 80 -s ";
public static final String IP_DEL = "iptables -D INPUT -i eth0 -j DROP -p tcp --dport 80 -s ";
public static final String HOST_IP = "61.129.70.239:80";
public static final long BAN_TIMEOUT = 30 * 60 * 1000L;
public static final long BAN_INTERVAL = 30 * 1000L;
public static final int CONCURRENT = 80;
public static final int SYN_CONCURRENT = 8;
public static final Map banMap = new HashMap();
public static void ban()//throwsException
{
Set banList = dynamicBanIP();
System.out.println();
System.out.println("Time: " + new Date());
Runtime runtime = Runtime.getRuntime();
List expiredIPList = new ArrayList();

for(Iterator iter = banMap.entrySet().iterator(); iter.hasNext();){
Map.Entry entry = (Map.Entry) iter.next();
if((System.currentTimeMillis() - ((Long) entry.getValue()).longValue()) > BAN_TIMEOUT){
expiredIPList.add(entry.getKey());
}
}
for(int i = 0; i try {
runtime.exec(IP_DEL + expiredIPList.get(i));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("DEL IP: " + expiredIPList.get(i));
banMap.remove(expiredIPList.get(i));
}
for(Iterator iter = banList.iterator(); iter.hasNext();){
String ip = (String) iter.next();
if(!banMap.containsKey(ip)){
try {
runtime.exec(IP_INSERT + ip);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
banMap.put(ip, new Long(System.currentTimeMillis()));
System.out.println("BAN IP:" + ip);
}
}
System.out.println("---ban ip list---");
for(Iterator iter = banMap.keySet().iterator(); iter.hasNext();){
String ip = (String) iter.next();
System.out.println(ip);
}
}
public static Set dynamicBanIP()//throwsException
{
String ipstat = null;
Set banList = new HashSet();
List ipList = new ArrayList();
List countList = new ArrayList();
List synCountList = new ArrayList();
List finCountList = new ArrayList();
Runtime runtime = Runtime.getRuntime();
Process process = null;
try {
process = runtime.exec(NETSTAT);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
InputStream input = process.getInputStream();
InputStreamReader inputReader = new InputStreamReader(input);
BufferedReader reader = new BufferedReader(inputReader);
try {
reader.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
reader.readLine();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
while((ipstat = reader.readLine()) != null){
StringTokenizer token = new StringTokenizer(ipstat);
while(token.hasMoreTokens()){
token.nextToken();
token.nextToken();
token.nextToken();
String originalIP = token.nextToken();
String ip = token.nextToken().split(":")[0];
String status = token.nextToken();
if(HOST_IP.equals(originalIP)){
if(!ipList.contains(ip)){
ipList.add(ip);
countList.add(new Integer(1));
if("SYN_RECV".equals(status)){
synCountList.add(new Integer(1));
}else{
synCountList.add(new Integer(0));
}
if("FIN_WAIT1".equals(status)){
finCountList.add(new Integer(1));
}else{
finCountList.add(new Integer(0));
}
}else{
int index = ipList.indexOf(ip);
countList.set(index, new Integer(((Integer) countList.get(index)).intValue() + 1));
if("SYN_RECV".equals(status)){
synCountList.set(index, new Integer(((Integer) synCountList.get(index)).intValue() + 1));
}
if("FIN_WAIT1".equals(status)){
finCountList.set(index, new Integer(((Integer) finCountList.get(index)).intValue() + 1));
}
}
}
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
inputReader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
input.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
process.destroy();
for(int i = 0; i if(((Integer) countList.get(i)).intValue() > CONCURRENT)
banList.add(ipList.get(i));
if(((Integer) synCountList.get(i)).intValue() > SYN_CONCURRENT)
banList.add(ipList.get(i));
if(((Integer) finCountList.get(i)).intValue() > SYN_CONCURRENT)
banList.add(ipList.get(i));
}
return banList;
}
public static void main(String[] args)//throwsException
{while(true){
ban();
try {
Thread.sleep(BAN_INTERVAL);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

Answer 1

import java.util.HashMap;还有他如何还挺热乎还挺热乎投入而后热火分别被风忽然发表回复和你发表回复合法发布会烦恼放不放的