######紧急求助！！！用java程序访问https站点的问题！！！！######

Question

http://www-900.ibm.com/developerWorks/java/jw-tips/tip096/index.shtml

Answer 1

java.sun.com/products/jsse
has examples.

Answer 2

to gdsean(摇滚java):谢谢你的解答，那个文章我看过了。我感觉那好像是针对jdk1.3以前的版本写的。我现在用的是jdk1.4beta3里面已经有了javax.net.*和javax.net.ssl.*,也就是说已经有了HttpsURLConnection这个类。to skyyoung(路人甲):我上次问你时你已经告诉我这个网址了，我也去看了，但是还没有摸着头绪。另附代码如下：希望两位朋友能帮我看看。
import java.net.*;
import java.io.*;
import javax.net.ssl.*;
import java.security.Security;public class TestHttps 
{
    public static void main(String args[])
    {
URL destURL;
        HttpsURLConnection urlConn;
        String request;
        try {
            System.setProperty("java.protocol.handler.pkgs",
                                  "com.sun.net.ssl.internal.www.protocol");
// Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
System.setProperty("javax.net.ssl.trustStore","MyCacertsFile");
destURL = new URL("https://localhost:8443/examples/jsp/checkbox/checkresult.jsp");
urlConn = (HttpsURLConnection)destURL.openConnection();
request="fruit=apples&fruit=oranges";
            urlConn.setDoOutput(true);    
            urlConn.setDoInput(true);     
            urlConn.setUseCaches(false);  
urlConn.setAllowUserInteraction(true);
            urlConn.setRequestProperty("Content-type","application/x-www-form-urlencoded");
            urlConn.setRequestProperty("Content-length", ""+request.length());
            DataOutputStream outStream = new DataOutputStream(urlConn.getOutputStream());
            outStream.writeBytes(request);
outStream.close();
try{
            DataInputStream inStream = new DataInputStream(urlConn.getInputStream());
System.out.println("Print HeaderFile:");
            int i=0;
            while(urlConn.getHeaderField(i)!=null){
               System.out.println(urlConn.getHeaderFieldKey(i)+" "+urlConn.getHeaderField(i));
  i++;
            }
System.out.println("user-agent= "+urlConn.getHeaderField("User-Agent"));
System.out.println("Proxy-Authorization= "+urlConn.getHeaderField("Proxy02"));
System.out.println("method="+urlConn.getRequestMethod());
System.out.println(""+urlConn.getResponseCode());            int ch;
            while ((ch = inStream.read()) >= 0) {
                System.out.print((char) ch);            }
            inStream.close();
            }catch(Exception e){System.out.println("Error"+"\n"+e);}
            }catch (Exception e) {

            e.printStackTrace();
        }
    
    
    }
    
}这段代码也有异常抛出：
java.lang.ClassCastException: com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnectionOldImpl
at TestHttps.main(TestHttps.java:19)

Answer 3

to gdsean(摇滚java):这个文章我已经看过了，但是我感觉它是针对jdk1.3以前的版本说的。因为我现在用的jdk1.4beta3版里已经增加了javax.net.*和javax.net.ssl.*等类包。
也就是说，已经有了HttpsURLConnection这个类，可以用它来建立HTTPS的连接。to skyyoung(路人甲):这个网址在你上次给我解答时我就去看了。现在我也在看，只是有
点莫不着头绪。希望两位朋友能在帮我看看。附调试代码如下：
import java.net.*;
import java.io.*;
import javax.net.ssl.*;
import java.security.Security;public class TestHttps 
{
    public static void main(String args[])
    {
URL destURL;
        HttpsURLConnection urlConn;
        String request;
        try {
            System.setProperty("java.protocol.handler.pkgs",
                                  "com.sun.net.ssl.internal.www.protocol");
// Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
System.setProperty("javax.net.ssl.trustStore","MyCacertsFile");
destURL = new URL("https://localhost:8443/examples/jsp/checkbox/checkresult.jsp");
urlConn = (HttpsURLConnection)destURL.openConnection();
request="fruit=apples&fruit=oranges";
            urlConn.setDoOutput(true);    
            urlConn.setDoInput(true);     
            urlConn.setUseCaches(false);  
urlConn.setAllowUserInteraction(true);
            urlConn.setRequestProperty("Content-type","application/x-www-form-urlencoded");
            urlConn.setRequestProperty("Content-length", ""+request.length());
            DataOutputStream outStream = new DataOutputStream(urlConn.getOutputStream());
            outStream.writeBytes(request);
outStream.close();
try{
            DataInputStream inStream = new DataInputStream(urlConn.getInputStream());
System.out.println("Print HeaderFile:");
            int i=0;
            while(urlConn.getHeaderField(i)!=null){
               System.out.println(urlConn.getHeaderFieldKey(i)+" "+urlConn.getHeaderField(i));
  i++;
            }
System.out.println("user-agent= "+urlConn.getHeaderField("User-Agent"));
System.out.println("Proxy-Authorization= "+urlConn.getHeaderField("Proxy02"));
System.out.println("method="+urlConn.getRequestMethod());
System.out.println(""+urlConn.getResponseCode());            int ch;
            while ((ch = inStream.read()) >= 0) {
                System.out.print((char) ch);            }
            inStream.close();
            }catch(Exception e){System.out.println("Error"+"\n"+e);}
            }catch (Exception e) {

            e.printStackTrace();
        }
    
    
    }
    
}这段代码仍有异常抛出：
java.lang.ClassCastException: com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnectionOldImpl
at TestHttps.main(TestHttps.java:19)

Answer 4

呵呵，我运行你上面的代码的结果是：
java.net.SocketException: Default SSL context init failed: null
        at javax.net.ssl.DefaultSSLSocketFactory.createSocket([DashoPro-V1.2-120
198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpsClient.doConnect([Da
shoPro-V1.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.NetworkClient.openServer(
[DashoPro-V1.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpClient.d([DashoPro-V1
.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpClient.<init>([DashoP
ro-V1.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpsClient.<init>([Dasho
Pro-V1.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpsClient.a([DashoPro-V
1.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpsClient.a([DashoPro-V
1.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnection.connec
t([DashoPro-V1.2-120198])
        at com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnection.getOut
putStream([DashoPro-V1.2-120198])
        at TestHttps.main(TestHttps.java:27)

Answer 5

to cherami(cherami):
可能是因为我的那段代码是连接我本机的tomcat吧。下面的代码是连接https://www.sun.com的。你再帮我看看。
import java.net.*;
import java.io.*;
import javax.net.ssl.*;public class TestHttps{
    private String httpsURL;
    private URL destURL;
    private HttpsURLConnection urlConn;
    private String request;    public void connectURL(){
        try{
            destURL = new URL(httpsURL);
   urlConn = (HttpsURLConnection)destURL.openConnection();
        }catch(Exception e){
            System.out.println("Connect URL Error :"+"\n"+e);
        }
    }    public void doResponse(){
        try{
            DataInputStream inStream = new DataInputStream(urlConn.getInputStream());
   System.out.println("Print HeaderFile:");
            int i=0;
            while(urlConn.getHeaderField(i)!=null){
                System.out.println(urlConn.getHeaderFieldKey(i)+" "+urlConn.getHeaderField(i));
       i++;
            }
   System.out.println("method="+urlConn.getRequestMethod());
   System.out.println(""+urlConn.getResponseCode());    int ch;
            while ((ch = inStream.read()) >= 0) {
                System.out.print((char) ch);
            }
            inStream.close();
        }catch(Exception e){
            System.out.println("Do Response Error"+"\n"+e);
        }
    }    public static void main(String args[]){        TestHttps th = new TestHttps();
        th.httpsURL="https://www.sun.com";
        th.connectURL();
        th.doResponse();
    }
}

Answer 6

这儿有很详细的资料
http://www.onjava.com/pub/a/onjava/2001/05/03/java_security.html

Answer 7

我没有遇到这样的错误，我这里是可以用get post 调用https//*.jsp的！