用socket保存一个网页上的验证码图片到本地，打开后显示 无法预览 是为什么啊？代码如下：
import *;
import *;
public class HTTPClient{
String host="reg.email.
int port=80;
Socket socket;
public void createSocket()throws Exception{
socket=new Socket(host, port);
}
public void communicate()throws Exception{
StringBuffer sb=new StringBuffer("GET /unireg/call.do?cmd=register.verifyCode&env=369398958183&t=1351924543383 HTTP/1.1\r\n");
sb.append("Host: reg.email.\r\n");
sb.append("Accept: */*\r\n");
sb.append("Accept-Language: zh-cn\r\n");
sb.append("Accept-Encoding: gzip, deflate\r\n");
sb.append("User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)\r\n");
sb.append("Connection: Keep-Alive\r\n\r\n");
OutputStream socketOut=socket.getOutputStream();
socketOut.write(sb.toString().getBytes());
socket.shutdownOutput();
InputStream socketIn=socket.getInputStream();
ByteArrayOutputStream buffer=new ByteArrayOutputStream();
byte[] buff=new byte[1024];
int len=-1;
while((len=socketIn.read(buff))!=-1){
buffer.write(buff,0,len);
}
socket.close();
FileOutputStream fos=new FileOutputStream(new File("c:\\1.jpg"));
OutputStreamWriter osw=new OutputStreamWriter(fos);
osw.write((new String(buffer.toByteArray())).split("\r\n\r\n")[1]);
osw.flush();
osw.close();
}
public static void main(String arch[])throws Exception{
HTTPClient client=new HTTPClient();
client.createSocket();
();
}
}

求指点!!!

各位大神、高手、英雄，走过路过的，指点一下！！！

这是返回的部分数据
HTTP/1.1 200 OK
Server: nginx
Date: Sat, 03 Nov 2012 08:10:52 GMT
Content-Type: image/jpeg;charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Set-Cookie: JSESSIONID=5CF3B05BC9422512233F4431C19E6210; Path=/unireg
pragma: NO-cache
Cache-Control: no-cache
Expries: Thu, 01 Jan 1970 00:00:00 GMT
Content-Language: zh-CN
X-Cache:  from gzip141-192.

你的代码并没有解析这些数据，它们不是图片数据。
另外http链接可以使用HttpURLConnection 进行传输数据，如果非要用socket那就要自己解析返回的数据。

有些图片链接是https的，怎么用HttpURLConnection？指点一下

osw.write((new String(buffer.toByteArray())).split("\r\n\r\n")[1]);
就是将响头和正文分开了啊

人呢？

public class ServletUtil {   


public static HttpURLConnection getHttpsURLConnection(String surl) throws NoSuchAlgorithmException, KeyManagementException, IOException{
        URL url=new URL(surl);
        if(surl.toLowerCase().startsWith("https")){
            SSLContext sc = null;
            TrustAnyHostnameVerifier verifier=null;
            sc = SSLContext.getInstance("SSL");
                sc.init(null, new TrustManager[] { new TrustAnyTrustManager() },
                        new java.security.SecureRandom());
                verifier = new TrustAnyHostnameVerifier();
            HttpsURLConnection httpsCon = (HttpsURLConnection) url.openConnection();
            httpsCon.setSSLSocketFactory(sc.getSocketFactory());
            httpsCon.setHostnameVerifier(verifier);
            return (HttpURLConnection)httpsCon;
        }else{
            return (HttpURLConnection) url.openConnection();
        }
       

    }
}

class TrustAnyTrustManager implements X509TrustManager {

    public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
    }

    public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
    }

    public X509Certificate[] getAcceptedIssuers() {
        return new X509Certificate[] {};
    }
}

class TrustAnyHostnameVerifier implements HostnameVerifier {
    public boolean verify(String hostname, SSLSession session) {
        return true;
    }
}

非常好用，谢谢；顺便问一下HttpClient怎么发送https 请求？非常好用，谢谢；顺便问一下HttpClient怎么发送https 请求？

URL url = new URL(...);
HttpURLConnection link = (HttpURLConnection)url.openConnection();
// 设置头信息：
link.setRequestProperty("...", "...");
link.setRequestProperty("...", "...");
link.setRequestProperty("...", "...");
...

// 默认使用GET方法，如果使用POST：
link.setRequestMethod("POST");
link.setDoOutput(true);

// 连接（如果在获取流的时候没有连接，则会自动连接，所以这句可以省略）：
link.connect();
// 获得输入流：
InputStream in = link.getInputStream();
...
in.close();
// 获得输出流(POST)：
OutputStream out = link.getOutputStream();
...
out.close();

[ 本帖最后由 lz1091914999 于 2012-11-6 23:47 编辑 ]