Java ServerSocket在转换为SSLSocket时不接受（空指针异常）

我一直在尝试将我在Java中使用套接字制作的客户机/服务器模型转换为SSL。生成包含服务器根文件和中间文件的PKCS12文件后，我使用System.setProperty将客户机和服务器文件中的信任和密钥库更改为PKCS文件。我不确定你是不是想这么做。我还对套接字进行了更改，使用SSLSocketFactory创建了必要的套接字

下面是代码。 客户：

服务器：

public Server(int port)
        {
            System.setProperty("javax.net.ssl.keyStore", "wa.p12");
            System.setProperty("javax.net.ssl.keyStorePassword", "namihana");
            System.setProperty("javax.net.ssl.keyStoreType", "PKCS12");
            System.setProperty("javax.net.ssl.trustStore", "wa.p12");
            System.setProperty("javax.net.ssl.trustStorePassword", "namihana");
            System.setProperty("javax.net.ssl.TrustStoreType", "PKCS12");
             multichoice_answers = new char[30];
             multichoice_answers[0] = 'A';
             multichoice_answers[1] = 'A';
             multichoice_answers[2] = 'D'; 
             multichoice_answers[3] = 'C';
             multichoice_answers[4] = 'C';
             multichoice_answers[5] = 'C';
             multichoice_answers[6] = 'D';
             multichoice_answers[7] = 'B';
             multichoice_answers[8] = 'D';
             multichoice_answers[9] = 'B';
             multichoice_answers[10] = 'C';
             multichoice_answers[11] = 'D';
             multichoice_answers[12] = 'A';
             multichoice_answers[13] = 'D';
             multichoice_answers[14] = 'C';

            try
        {
            SSLServerSocketFactory ssf =  (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
            SSLServerSocket server_socket =  (SSLServerSocket) ssf.createServerSocket(port); 
            System.out.println("Server_socket made");
            Security.addProvider(new Provider()); 
            //server_socket.setSoTimeout(100000); 
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
     }


    public void receive()
    {
        try
        {
             System.out.println("Server connected2");   
             socket_2 =   server_socket.accept();

---

您的

try

块中有一个本地

ServerSocket

变量正在跟踪类成员。

您没有真正提出问题，也没有完全解释问题所在，也没有给出完整的示例来说明问题。看起来你有75%的机会回答一个好问题，但后来放弃了。请编辑您的问题以添加缺少的详细信息。

public Server(int port)
        {
            System.setProperty("javax.net.ssl.keyStore", "wa.p12");
            System.setProperty("javax.net.ssl.keyStorePassword", "namihana");
            System.setProperty("javax.net.ssl.keyStoreType", "PKCS12");
            System.setProperty("javax.net.ssl.trustStore", "wa.p12");
            System.setProperty("javax.net.ssl.trustStorePassword", "namihana");
            System.setProperty("javax.net.ssl.TrustStoreType", "PKCS12");
             multichoice_answers = new char[30];
             multichoice_answers[0] = 'A';
             multichoice_answers[1] = 'A';
             multichoice_answers[2] = 'D'; 
             multichoice_answers[3] = 'C';
             multichoice_answers[4] = 'C';
             multichoice_answers[5] = 'C';
             multichoice_answers[6] = 'D';
             multichoice_answers[7] = 'B';
             multichoice_answers[8] = 'D';
             multichoice_answers[9] = 'B';
             multichoice_answers[10] = 'C';
             multichoice_answers[11] = 'D';
             multichoice_answers[12] = 'A';
             multichoice_answers[13] = 'D';
             multichoice_answers[14] = 'C';

            try
        {
            SSLServerSocketFactory ssf =  (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
            SSLServerSocket server_socket =  (SSLServerSocket) ssf.createServerSocket(port); 
            System.out.println("Server_socket made");
            Security.addProvider(new Provider()); 
            //server_socket.setSoTimeout(100000); 
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
     }


    public void receive()
    {
        try
        {
             System.out.println("Server connected2");   
             socket_2 =   server_socket.accept();